source: src/Parser/parser.yy@ dd78dbc

Last change on this file since dd78dbc was daa4cc1, checked in by Peter A. Buhr <pabuhr@…>, 14 months ago

temporary hack to allow parsing of default/named parameters/calls
  • Property mode set to 100644
File size: 178.6 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// parser.yy --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Fri Jul 26 14:09:30 2024
13// Update Count : 6733
14//
15
16// This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C
17// grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been
18// copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar.
19// In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax
20// that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks
21// required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions.
22
23// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24// the grammar.
25
26// The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for:
27//
28// designation with '=' (use ':' instead)
29//
30// This incompatibility is discussed in detail before the "designation" grammar rule. Most of the syntactic extensions
31// from ANSI90 to ANSI11 C are marked with the comment "C99/C11".
32
33// This grammar also has two levels of extensions. The first extensions cover most of the GCC C extensions. All of the
34// syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall (CFA), which
35// fixes several of C's outstanding problems and extends C with many modern language concepts. All of the syntactic
36// extensions for CFA C are marked with the comment "CFA".
37
38%{
39#define YYDEBUG_LEXER_TEXT( yylval ) // lexer loads this up each time
40#define YYDEBUG 1 // get the pretty debugging code to compile
41#define YYERROR_VERBOSE // more information in syntax errors
42
43#undef __GNUC_MINOR__
44
45#include <cstdio>
46#include <sstream>
47#include <stack>
48using namespace std;
49
50#include "DeclarationNode.hpp" // for DeclarationNode, ...
51#include "ExpressionNode.hpp" // for ExpressionNode, ...
52#include "InitializerNode.hpp" // for InitializerNode, ...
53#include "ParserTypes.hpp"
54#include "StatementNode.hpp" // for build_...
55#include "TypedefTable.hpp"
56#include "TypeData.hpp"
57#include "AST/Type.hpp" // for BasicType, BasicKind
58#include "Common/SemanticError.hpp" // error_str
59#include "Common/Utility.hpp" // for maybeMoveBuild, maybeBuild, CodeLo...
60
61// lex uses __null in a boolean context, it's fine.
62#ifdef __clang__
63#pragma GCC diagnostic ignored "-Wparentheses-equality"
64#endif
65
66extern DeclarationNode * parseTree;
67extern ast::Linkage::Spec linkage;
68extern TypedefTable typedefTable;
69
70stack<ast::Linkage::Spec> linkageStack;
71
72bool appendStr( string & to, string & from ) {
73 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
74 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
75 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
76 // easier to let the C compiler handle this case.
77 //
78 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
79 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
80 // e.g., u"a" U"b" L"c" is disallowed.
81
82 if ( from[0] != '"' ) { // encoding ?
83 if ( to[0] != '"' ) { // encoding ?
84 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
85 yyerror( "non-matching string encodings for string-literal concatenation" );
86 return false; // parse error, must call YYERROR in action
87 } else if ( from[1] == '8' ) {
88 from.erase( 0, 1 ); // remove 2nd encoding
89 } // if
90 } else {
91 if ( from[1] == '8' ) { // move encoding to start
92 to = "u8" + to;
93 from.erase( 0, 1 ); // remove 2nd encoding
94 } else {
95 to = from[0] + to;
96 } // if
97 } // if
98 from.erase( 0, 1 ); // remove 2nd encoding
99 } // if
100 to += " " + from; // concatenated into single string
101 return true;
102} // appendStr
103
104DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
105 // Distribute type specifier across all declared variables, e.g., static, const, __attribute__.
106 assert( declList );
107
108 // Do not distribute attributes for aggregates because the attributes surrounding the aggregate belong it not the
109 // variables in the declaration list, e.g.,
110 //
111 // struct __attribute__(( aligned(128) )) S { ...
112 // } v1 __attribute__(( aligned(64) )), v2 __attribute__(( aligned(32) )), v3;
113 // struct S v4;
114 //
115 // v1 => 64, v2 =>32, v3 => 128, v2 => 128
116 //
117 // Anonymous aggregates are a special case because there is no aggregate to bind the attribute to; hence it floats
118 // to the declaration list.
119 //
120 // struct __attribute__(( aligned(128) )) /*anonymous */ { ... } v1;
121 //
122 // v1 => 128
123
124 bool copyattr = ! (typeSpec->type && typeSpec->type->kind == TypeData::Aggregate && ! typeSpec->type->aggregate.anon );
125
126 // addType copies the type information for the aggregate instances from typeSpec into cl's aggInst.aggregate.
127 DeclarationNode * cl = (new DeclarationNode)->addType( typeSpec ); // typeSpec IS DELETED!!!
128
129 // Start at second variable in declaration list and clone the type specifiers for each variable.
130 for ( DeclarationNode * cur = declList->next ; cur != nullptr; cur = cur->next ) {
131 cl->cloneBaseType( cur, copyattr ); // cur is modified
132 } // for
133
134 // Add first variable in declaration list with hidden type information in aggInst.aggregate, which is used by
135 // extractType to recover the type for the aggregate instances.
136 declList->addType( cl, copyattr ); // cl IS DELETED!!!
137 return declList;
138} // distAttr
139
140void distExt( DeclarationNode * declaration ) {
141 // distribute EXTENSION across all declarations
142 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
143 iter->set_extension( true );
144 } // for
145} // distExt
146
147void distInl( DeclarationNode * declaration ) {
148 // distribute INLINE across all declarations
149 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
150 iter->set_inLine( true );
151 } // for
152} // distInl
153
154void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
155 // distribute qualifiers across all non-variable declarations in a distribution statemement
156 for ( DeclarationNode * iter = declaration ; iter != nullptr ; iter = iter->next ) {
157 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
158 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
159 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
160 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
161 DeclarationNode * clone = qualifiers->clone();
162 if ( qualifiers->type ) { // forall clause ? (handles SC)
163 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
164 swap( clone->type->forall, iter->type->aggregate.params );
165 iter->addQualifiers( clone );
166 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
167 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
168 DeclarationNode newnode;
169 swap( newnode.type, iter->type->aggInst.aggregate );
170 swap( clone->type->forall, newnode.type->aggregate.params );
171 newnode.addQualifiers( clone );
172 swap( newnode.type, iter->type->aggInst.aggregate );
173 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
174 swap( clone->type->forall, iter->type->forall );
175 iter->addQualifiers( clone );
176 } // if
177 } else { // just SC qualifiers
178 iter->addQualifiers( clone );
179 } // if
180 } // for
181 delete qualifiers;
182} // distQual
183
184// There is an ambiguity for inline generic-routine return-types and generic routines.
185// forall( otype T ) struct S { int i; } bar( T ) {}
186// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
187// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
188// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
189// forall( otype T ) struct S { int T; };
190// forall( otype W ) bar( W ) {}
191
192void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
193 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
194 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
195 declSpec->type->aggregate.params = nullptr;
196 } // if
197} // rebindForall
198
199string * build_postfix_name( string * name ) {
200 *name = string("__postfix_func_") + *name;
201 return name;
202} // build_postfix_name
203
204DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
205 if ( nullptr == fieldList ) {
206 if ( !( typeSpec->type && typeSpec->type->kind == TypeData::Aggregate ) ) {
207 stringstream ss;
208 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
209 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
210 return nullptr;
211 } // if
212 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
213 fieldList = DeclarationNode::newName( nullptr );
214 } // if
215
216 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
217 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
218 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
219 return temp;
220} // fieldDecl
221
222#define NEW_ZERO new ExpressionNode( build_constantInteger( yylloc, *new string( "0" ) ) )
223#define NEW_ONE new ExpressionNode( build_constantInteger( yylloc, *new string( "1" ) ) )
224#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
225#define MISSING_ANON_FIELD "illegal syntax, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
226#define MISSING_LOW "illegal syntax, missing low value for ascanding range so index is uninitialized."
227#define MISSING_HIGH "illegal syntax, missing high value for descending range so index is uninitialized."
228
229static ForCtrl * makeForCtrl( const CodeLocation & location, DeclarationNode * init, OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
230 // Wrap both comp/inc if they are non-null.
231 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
232 compop,
233 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
234 comp ) );
235 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
236 // choose += or -= for upto/downto
237 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
238 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
239 inc ) );
240 // The StatementNode call frees init->name, it must happen later.
241 return new ForCtrl( new StatementNode( init ), comp, inc );
242}
243
244ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
245 if ( index->initializer ) {
246 SemanticError( yylloc, "illegal syntax, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
247 } // if
248 if ( index->next ) {
249 SemanticError( yylloc, "illegal syntax, multiple loop indexes disallowed in for-loop declaration." );
250 } // if
251 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
252 return makeForCtrl( location, initDecl, compop, comp, inc );
253} // forCtrl
254
255ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
256 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
257 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
258 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicKind::SignedInt ) ) );
259 } // if
260 DeclarationNode * initDecl = distAttr(
261 DeclarationNode::newTypeof( type, true ),
262 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
263 );
264 return makeForCtrl( location, initDecl, compop, comp, inc );
265} // forCtrl
266
267#define MISSING_LOOP_INDEX "illegal syntax, only a single identifier or declaration allowed in initialization, e.g., for ( i; ... ) or for ( int i; ... ). Expression disallowed."
268
269ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
270 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
271 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
272 } else {
273 SemanticError( yylloc, MISSING_LOOP_INDEX ); return nullptr;
274 } // if
275} // forCtrl
276
277ForCtrl * enumRangeCtrl( ExpressionNode * index_expr, OperKinds compop, ExpressionNode * range_over_expr, DeclarationNode * type ) {
278 assert( compop == OperKinds::LEThan || compop == OperKinds::GEThan );
279 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index_expr->expr.get()) ) {
280 DeclarationNode * indexDecl =
281 DeclarationNode::newName( new std::string(identifier->name) )->addType( type );
282 return new ForCtrl( new StatementNode( indexDecl ), range_over_expr, compop );
283 } else {
284 SemanticError( yylloc, MISSING_LOOP_INDEX ); return nullptr;
285 } // if
286} // enumRangeCtrl
287
288static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
289 SemanticError( yylloc, "illegal syntax, adjacent identifiers \"%s\" and \"%s\" are not meaningful in an %s.\n"
290 "Possible cause is misspelled type name or missing generic parameter.",
291 identifier1.c_str(), identifier2.c_str(), kind );
292} // IdentifierBeforeIdentifier
293
294static void IdentifierBeforeType( string & identifier, const char * kind ) {
295 SemanticError( yylloc, "illegal syntax, identifier \"%s\" cannot appear before a %s.\n"
296 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter.",
297 identifier.c_str(), kind );
298} // IdentifierBeforeType
299
300bool forall = false; // aggregate have one or more forall qualifiers ?
301
302// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
303#define YYLLOC_DEFAULT(Cur, Rhs, N) \
304if ( N ) { \
305 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
306 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
307 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
308 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
309 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
310} else { \
311 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
312 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
313 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
314}
315%}
316
317%define parse.error verbose
318
319// Types declaration for productions
320
321%union {
322 // A raw token can be used.
323 Token tok;
324
325 // The general node types hold some generic node or list of nodes.
326 DeclarationNode * decl;
327 InitializerNode * init;
328 ExpressionNode * expr;
329 StatementNode * stmt;
330 ClauseNode * clause;
331 TypeData * type;
332
333 // Special "nodes" containing compound information.
334 CondCtl * ifctl;
335 ForCtrl * forctl;
336 LabelNode * labels;
337
338 // Various flags and single values that become fields later.
339 ast::AggregateDecl::Aggregate aggKey;
340 ast::TypeDecl::Kind tclass;
341 OperKinds oper;
342 bool is_volatile;
343 EnumHiding enum_hiding;
344 ast::ExceptionKind except_kind;
345 // String passes ownership with it.
346 std::string * str;
347
348 // Narrower node types are used to avoid constant unwrapping.
349 ast::WaitForStmt * wfs;
350 ast::WaitUntilStmt::ClauseNode * wucn;
351 ast::GenericExpr * genexpr;
352}
353
354// ************************ TERMINAL TOKENS ********************************
355
356// keywords
357%token TYPEDEF
358%token EXTERN STATIC AUTO REGISTER
359%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
360%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
361%token NORETURN // C11
362%token CONST VOLATILE
363%token RESTRICT // C99
364%token ATOMIC // C11
365%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
366%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
367%token BOOL COMPLEX IMAGINARY // C99
368%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
369%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
370%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
371%token ZERO_T ONE_T // CFA
372%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE COUNTOF // GCC
373%token OFFSETOF BASETYPEOF TYPEID // CFA
374%token ENUM STRUCT UNION
375%token EXCEPTION // CFA
376%token GENERATOR COROUTINE MONITOR THREAD // CFA
377%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
378// %token RESUME // CFA
379%token LABEL // GCC
380%token SUSPEND // CFA
381%token ATTRIBUTE EXTENSION // GCC
382%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
383%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
384%token CORUN COFOR
385%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
386%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
387%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
388
389// names and constants: lexer differentiates between identifier and typedef names
390%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
391%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
392%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
393%token<tok> DIRECTIVE
394// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
395// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
396// converted into the tuple index (.)(1). e.g., 3.x
397%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
398
399// multi-character operators
400%token ARROW // ->
401%token ICR DECR // ++ --
402%token LS RS // << >>
403%token LE GE EQ NE // <= >= == !=
404%token ANDAND OROR // && ||
405%token ATTR ELLIPSIS // @@ ...
406
407%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
408%token PLUSassign MINUSassign // += -=
409%token LSassign RSassign // <<= >>=
410%token ANDassign ERassign ORassign // &= ^= |=
411
412%token ErangeUp ErangeUpEq ErangeDown ErangeDownEq // +~ +~=/~= -~ -~=
413%token ATassign // @=
414
415%type<tok> identifier identifier_at identifier_or_type_name attr_name
416%type<tok> quasi_keyword
417%type<expr> string_literal
418%type<str> string_literal_list
419
420%type<enum_hiding> hide_opt visible_hide_opt
421
422// expressions
423%type<expr> constant
424%type<expr> tuple tuple_expression_list
425%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
426%type<expr> primary_expression postfix_expression unary_expression
427%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
428%type<expr> shift_expression relational_expression equality_expression
429%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
430%type<expr> logical_AND_expression logical_OR_expression
431%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
432%type<expr> comma_expression comma_expression_opt
433%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
434%type<ifctl> conditional_declaration
435%type<forctl> for_control_expression for_control_expression_list
436%type<oper> upupeq updown updowneq downupdowneq
437%type<expr> subrange
438%type<decl> asm_name_opt
439%type<expr> asm_operands_opt asm_operands_list asm_operand
440%type<labels> label_list
441%type<expr> asm_clobbers_list_opt
442%type<is_volatile> asm_volatile_opt
443%type<expr> handler_predicate_opt
444%type<genexpr> generic_association generic_assoc_list
445
446// statements
447%type<stmt> statement labeled_statement compound_statement
448%type<stmt> statement_decl statement_decl_list statement_list_nodecl
449%type<stmt> selection_statement
450%type<clause> switch_clause_list_opt switch_clause_list
451%type<expr> case_value
452%type<clause> case_clause case_value_list case_label case_label_list
453%type<stmt> iteration_statement jump_statement
454%type<stmt> expression_statement asm_statement
455%type<stmt> with_statement
456%type<expr> with_clause_opt
457%type<stmt> corun_statement cofor_statement
458%type<stmt> exception_statement
459%type<clause> handler_clause finally_clause
460%type<except_kind> handler_key
461%type<stmt> mutex_statement
462%type<expr> when_clause when_clause_opt waitfor waituntil timeout
463%type<stmt> waitfor_statement waituntil_statement
464%type<wfs> wor_waitfor_clause
465%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
466
467// declarations
468%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
469%type<decl> abstract_parameter_declarator_opt abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
470%type<decl> abstract_parameter_declaration
471
472%type<aggKey> aggregate_key aggregate_data aggregate_control
473%type<decl> aggregate_type aggregate_type_nobody
474
475%type<decl> assertion assertion_list assertion_list_opt
476
477%type<expr> bit_subrange_size_opt bit_subrange_size
478
479%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
480%type<type> basic_type_name_type
481%type<type> vtable vtable_opt default_opt
482
483%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
484
485%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
486%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
487
488%type<decl> elaborated_type elaborated_type_nobody
489
490%type<decl> enumerator_list enum_type enum_type_nobody enum_key enumerator_type
491%type<init> enumerator_value_opt
492
493%type<decl> external_definition external_definition_list external_definition_list_opt
494
495%type<decl> exception_declaration
496
497%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
498%type<expr> field field_name_list field_name fraction_constants_opt
499
500%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
501
502%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
503%type<decl> identifier_list
504
505%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
506%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
507%type<decl> cfa_abstract_ptr cfa_abstract_tuple
508
509%type<decl> cfa_array_parameter_1st_dimension
510
511%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
512%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
513
514%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
515%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
516
517%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_list_ellipsis_opt
518
519%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
520
521%type<decl> c_declaration static_assert
522%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
523%type<decl> KR_parameter_list KR_parameter_list_opt
524
525%type<decl> parameter_declaration parameter_list parameter_list_ellipsis_opt
526
527%type<decl> paren_identifier paren_type
528
529%type<decl> storage_class storage_class_list
530
531%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
532
533%type<tclass> type_class new_type_class
534%type<decl> type_declarator type_declarator_name type_declaring_list
535
536%type<decl> type_declaration_specifier type_type_specifier
537%type<type> type_name typegen_name
538%type<decl> typedef_name typedef_declaration typedef_expression
539
540%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
541%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
542
543%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
544
545%type<decl> type type_no_function
546%type<decl> type_parameter type_parameter_list type_initializer_opt
547
548%type<expr> type_parameters_opt type_list array_type_list // array_dimension_list
549
550%type<decl> type_qualifier forall type_qualifier_list_opt type_qualifier_list
551%type<type> type_qualifier_name
552%type<decl> type_specifier type_specifier_nobody
553
554%type<decl> variable_declarator variable_ptr variable_array variable_function
555%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
556
557%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
558
559// initializers
560%type<init> initializer initializer_list_opt initializer_opt
561
562// designators
563%type<expr> designator designator_list designation
564
565
566// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
567// .---------. matches IF '(' comma_expression ')' statement . (reduce)
568// if ( C ) S1 else S2
569// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
570// Similar issues exit with the waitfor statement.
571
572// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
573// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
574%precedence THEN // rule precedence for IF/WAITFOR statement
575%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
576%precedence WAND // token precedence for start of WAND in WAITFOR statement
577%precedence OROR // token precedence for start of WOR in WAITFOR statement
578%precedence WOR // token precedence for start of WOR in WAITFOR statement
579%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
580%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
581%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
582%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
583%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
584%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
585%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
586
587
588// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
589// forall( otype T ) struct Foo { T v; };
590// .-----. matches pointer to function returning a generic (which is impossible without a type)
591// Foo ( *fp )( int );
592// `---' matches start of TYPEGENname '('
593// must be:
594// Foo( int ) ( *fp )( int );
595// The same problem occurs here:
596// forall( otype T ) struct Foo { T v; } ( *fp )( int );
597// must be:
598// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
599
600// Order of these lines matters (low-to-high precedence).
601%precedence TYPEGENname
602%precedence '}'
603%precedence '('
604
605// %precedence RESUME
606// %precedence '{'
607// %precedence ')'
608
609%locations // support location tracking for error messages
610
611%start translation_unit // parse-tree root
612
613%%
614// ************************ Namespace Management ********************************
615
616// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
617// which are lexically identical.
618//
619// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
620// foo f; // to allow it to appear in this context
621//
622// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
623// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
624// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
625// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
626// must be distinguished by the lexical scanner.
627//
628// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
629// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
630// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
631// each context that introduces a name scope, a new level is created in the type table and that level is popped on
632// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
633// This requires distinguishing between type names that are local to the current declaration scope and those that
634// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
635//
636// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
637// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
638// around the list separator.
639//
640// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
641// push pop push pop
642
643push:
644 { typedefTable.enterScope(); }
645 ;
646
647pop:
648 { typedefTable.leaveScope(); }
649 ;
650
651// ************************ CONSTANTS ********************************
652
653constant:
654 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
655 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
656 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
657 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
658 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
659 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
660 ;
661
662quasi_keyword: // CFA
663 TIMEOUT
664 | WAND
665 | WOR
666 | CATCH
667 | RECOVER
668 | CATCHRESUME
669 | FIXUP
670 | FINALLY
671 ;
672
673identifier:
674 IDENTIFIER
675 | quasi_keyword
676 ;
677
678identifier_at:
679 identifier
680 | '@' // CFA
681 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
682 ;
683
684identifier_or_type_name:
685 identifier
686 | TYPEDEFname
687 | TYPEGENname
688 ;
689
690string_literal:
691 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
692 ;
693
694string_literal_list: // juxtaposed strings are concatenated
695 STRINGliteral { $$ = $1; } // conversion from tok to str
696 | string_literal_list STRINGliteral
697 {
698 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
699 delete $2; // allocated by lexer
700 $$ = $1; // conversion from tok to str
701 }
702 ;
703
704// ************************ EXPRESSIONS ********************************
705
706primary_expression:
707 IDENTIFIER // typedef name cannot be used as a variable name
708 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
709 | quasi_keyword
710 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
711 | TYPEDIMname // CFA, generic length argument
712 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
713 | tuple
714 | '(' comma_expression ')'
715 { $$ = $2; }
716 | '(' compound_statement ')' // GCC, lambda expression
717 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
718 | type_name '.' identifier // CFA, nested type
719 { $$ = new ExpressionNode( build_qualified_expr( yylloc, DeclarationNode::newFromTypeData( $1 ), build_varref( yylloc, $3 ) ) ); }
720 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
721 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
722 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
723 {
724 // add the missing control expression to the GenericExpr and return it
725 $5->control = maybeMoveBuild( $3 );
726 $$ = new ExpressionNode( $5 );
727 }
728 // | RESUME '(' comma_expression ')'
729 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
730 // | RESUME '(' comma_expression ')' compound_statement
731 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
732 | IDENTIFIER IDENTIFIER // invalid syntax rule
733 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "expression" ); $$ = nullptr; }
734 | IDENTIFIER type_qualifier // invalid syntax rule
735 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
736 | IDENTIFIER storage_class // invalid syntax rule
737 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
738 | IDENTIFIER basic_type_name // invalid syntax rule
739 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
740 | IDENTIFIER TYPEDEFname // invalid syntax rule
741 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
742 | IDENTIFIER TYPEGENname // invalid syntax rule
743 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
744 ;
745
746generic_assoc_list: // C11
747 generic_association
748 | generic_assoc_list ',' generic_association
749 {
750 // steal the association node from the singleton and delete the wrapper
751 assert( 1 == $3->associations.size() );
752 $1->associations.push_back( $3->associations.front() );
753 delete $3;
754 $$ = $1;
755 }
756 ;
757
758generic_association: // C11
759 type_no_function ':' assignment_expression
760 {
761 // create a GenericExpr wrapper with one association pair
762 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
763 }
764 | DEFAULT ':' assignment_expression
765 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
766 ;
767
768postfix_expression:
769 primary_expression
770 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
771 // Historic, transitional: Disallow commas in subscripts.
772 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
773 // Current: Commas in subscripts make tuples.
774 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, $3->set_last( $5 ) ) ) ) ); }
775 | postfix_expression '[' assignment_expression ']'
776 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
777 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
778 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
779 // equivalent to the old x[i,j].
780 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
781 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
782 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
783 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
784 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
785 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
786 {
787 Token fn;
788 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
789 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $1->set_last( $3 ) ) ) );
790 }
791 | postfix_expression '(' argument_expression_list_opt ')'
792 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
793 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
794 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
795 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg" ) ) ),
796 $3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) ) ) ); }
797 | postfix_expression '`' identifier // CFA, postfix call
798 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
799 | constant '`' identifier // CFA, postfix call
800 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
801 | string_literal '`' identifier // CFA, postfix call
802 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
803
804 // SKULLDUGGERY: The typedef table used for parsing does not store fields in structures. To parse a qualified
805 // name, it is assumed all name-tokens after the first are identifiers, regardless of how the lexer identifies
806 // them. For example:
807 //
808 // struct S;
809 // forall(T) struct T;
810 // union U;
811 // enum E { S, T, E };
812 // struct Z { int S, T, Z, E, U; };
813 // void fred () {
814 // Z z;
815 // z.S; // lexer returns S is TYPEDEFname
816 // z.T; // lexer returns T is TYPEGENname
817 // z.Z; // lexer returns Z is TYPEDEFname
818 // z.U; // lexer returns U is TYPEDEFname
819 // z.E; // lexer returns E is TYPEDEFname
820 // }
821 | postfix_expression '.' identifier_or_type_name
822 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
823
824 | postfix_expression '.' INTEGERconstant // CFA, tuple index
825 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
826 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
827 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
828 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
829 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
830 | postfix_expression '.' aggregate_control
831 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
832 | postfix_expression ARROW identifier
833 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
834 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
835 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
836 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
837 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
838 | postfix_expression ICR
839 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
840 | postfix_expression DECR
841 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
842 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
843 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
844 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
845 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
846 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
847 {
848 Token fn;
849 fn.str = new string( "^?{}" ); // location undefined
850 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $2->set_last( $4 ) ) );
851 }
852 ;
853
854field_name_list: // CFA, tuple field selector
855 field
856 | field_name_list ',' field { $$ = $1->set_last( $3 ); }
857 ;
858
859field: // CFA, tuple field selector
860 field_name
861 | FLOATING_DECIMALconstant field
862 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
863 | FLOATING_DECIMALconstant '[' field_name_list ']'
864 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
865 | field_name '.' field
866 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
867 | field_name '.' '[' field_name_list ']'
868 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
869 | field_name ARROW field
870 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
871 | field_name ARROW '[' field_name_list ']'
872 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
873 ;
874
875field_name:
876 INTEGERconstant fraction_constants_opt
877 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
878 | FLOATINGconstant fraction_constants_opt
879 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
880 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
881 {
882 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
883 }
884 ;
885
886fraction_constants_opt:
887 // empty
888 { $$ = nullptr; }
889 | fraction_constants_opt FLOATING_FRACTIONconstant
890 {
891 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
892 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
893 }
894 ;
895
896unary_expression:
897 postfix_expression
898 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
899 // semantics checks, e.g., ++3, 3--, *3, &&3
900 | constant
901 | string_literal
902 { $$ = $1; }
903 | EXTENSION cast_expression // GCC
904 { $$ = $2->set_extension( true ); }
905 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
906 // { * X; } // dereference X
907 // { * int X; } // CFA declaration of pointer to int
908 | ptrref_operator cast_expression // CFA
909 {
910 switch ( $1 ) {
911 case OperKinds::AddressOf:
912 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
913 break;
914 case OperKinds::PointTo:
915 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
916 break;
917 case OperKinds::And:
918 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
919 break;
920 default:
921 assert( false );
922 }
923 }
924 | unary_operator cast_expression
925 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
926 | ICR unary_expression
927 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
928 | DECR unary_expression
929 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
930 | SIZEOF unary_expression
931 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
932 | SIZEOF '(' type_no_function ')'
933 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
934 | ALIGNOF unary_expression // GCC, variable alignment
935 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
936 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
937 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
938
939 // Cannot use rule "type", which includes cfa_abstract_function, for sizeof/alignof, because of S/R problems on
940 // look ahead, so the cfa_abstract_function is factored out.
941 | SIZEOF '(' cfa_abstract_function ')'
942 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
943 | ALIGNOF '(' cfa_abstract_function ')' // GCC, type alignment
944 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
945
946 | OFFSETOF '(' type_no_function ',' identifier ')'
947 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
948 | TYPEID '(' type ')'
949 {
950 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
951 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
952 }
953 | COUNTOF unary_expression
954 { $$ = new ExpressionNode( new ast::CountExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
955 | COUNTOF '(' type_no_function ')'
956 { $$ = new ExpressionNode( new ast::CountExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
957 ;
958
959ptrref_operator:
960 '*' { $$ = OperKinds::PointTo; }
961 | '&' { $$ = OperKinds::AddressOf; }
962 // GCC, address of label must be handled by semantic check for ref,ref,label
963 | ANDAND { $$ = OperKinds::And; }
964 ;
965
966unary_operator:
967 '+' { $$ = OperKinds::UnPlus; }
968 | '-' { $$ = OperKinds::UnMinus; }
969 | '!' { $$ = OperKinds::Neg; }
970 | '~' { $$ = OperKinds::BitNeg; }
971 ;
972
973cast_expression:
974 unary_expression
975 | '(' type_no_function ')' cast_expression
976 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
977 | '(' aggregate_control '&' ')' cast_expression // CFA
978 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
979 | '(' aggregate_control '*' ')' cast_expression // CFA
980 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
981 | '(' VIRTUAL ')' cast_expression // CFA
982 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), nullptr ) ); }
983 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
984 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
985 | '(' RETURN type_no_function ')' cast_expression // CFA
986 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
987 | '(' COERCE type_no_function ')' cast_expression // CFA
988 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
989 | '(' qualifier_cast_list ')' cast_expression // CFA
990 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
991// | '(' type_no_function ')' tuple
992// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
993 ;
994
995qualifier_cast_list:
996 cast_modifier type_qualifier_name
997 | cast_modifier MUTEX
998 | qualifier_cast_list cast_modifier type_qualifier_name
999 | qualifier_cast_list cast_modifier MUTEX
1000 ;
1001
1002cast_modifier:
1003 '-'
1004 | '+'
1005 ;
1006
1007exponential_expression:
1008 cast_expression
1009 | exponential_expression '\\' cast_expression
1010 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
1011 ;
1012
1013multiplicative_expression:
1014 exponential_expression
1015 | multiplicative_expression '*' exponential_expression
1016 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
1017 | multiplicative_expression '/' exponential_expression
1018 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
1019 | multiplicative_expression '%' exponential_expression
1020 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
1021 ;
1022
1023additive_expression:
1024 multiplicative_expression
1025 | additive_expression '+' multiplicative_expression
1026 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
1027 | additive_expression '-' multiplicative_expression
1028 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
1029 ;
1030
1031shift_expression:
1032 additive_expression
1033 | shift_expression LS additive_expression
1034 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
1035 | shift_expression RS additive_expression
1036 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
1037 ;
1038
1039relational_expression:
1040 shift_expression
1041 | relational_expression '<' shift_expression
1042 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
1043 | relational_expression '>' shift_expression
1044 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
1045 | relational_expression LE shift_expression
1046 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
1047 | relational_expression GE shift_expression
1048 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
1049 ;
1050
1051equality_expression:
1052 relational_expression
1053 | equality_expression EQ relational_expression
1054 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1055 | equality_expression NE relational_expression
1056 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1057 ;
1058
1059AND_expression:
1060 equality_expression
1061 | AND_expression '&' equality_expression
1062 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1063 ;
1064
1065exclusive_OR_expression:
1066 AND_expression
1067 | exclusive_OR_expression '^' AND_expression
1068 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1069 ;
1070
1071inclusive_OR_expression:
1072 exclusive_OR_expression
1073 | inclusive_OR_expression '|' exclusive_OR_expression
1074 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1075 ;
1076
1077logical_AND_expression:
1078 inclusive_OR_expression
1079 | logical_AND_expression ANDAND inclusive_OR_expression
1080 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1081 ;
1082
1083logical_OR_expression:
1084 logical_AND_expression
1085 | logical_OR_expression OROR logical_AND_expression
1086 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1087 ;
1088
1089conditional_expression:
1090 logical_OR_expression
1091 | logical_OR_expression '?' comma_expression ':' conditional_expression
1092 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1093 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1094 { $$ = new ExpressionNode( build_cond( yylloc, $1, nullptr, $4 ) ); }
1095 ;
1096
1097constant_expression:
1098 conditional_expression
1099 ;
1100
1101argument_expression_list_opt:
1102 // empty
1103 { $$ = nullptr; }
1104 | argument_expression_list
1105 ;
1106
1107argument_expression_list:
1108 argument_expression
1109 // | argument_expression_list_opt ',' argument_expression // CFA, allow empty argument
1110 | argument_expression_list ',' argument_expression // no empty argument
1111 { $$ = $1->set_last( $3 ); }
1112 ;
1113
1114argument_expression:
1115 '?' // CFA, default parameter
1116 // { SemanticError( yylloc, "Argument to default parameter is currently unimplemented." ); $$ = nullptr; }
1117 { $$ = new ExpressionNode( build_constantInteger( yylloc, *new string( "2" ) ) ); }
1118 | '?' identifier '=' assignment_expression // CFA, keyword argument
1119 // { SemanticError( yylloc, "keyword argument is currently unimplemented." ); $$ = nullptr; }
1120 { $$ = $4; }
1121 | assignment_expression
1122 ;
1123
1124assignment_expression:
1125 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1126 conditional_expression
1127 | unary_expression assignment_operator assignment_expression
1128 {
1129// if ( $2 == OperKinds::AtAssn ) {
1130// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1131// } else {
1132 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1133// } // if
1134 }
1135 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1136 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1137 ;
1138
1139assignment_expression_opt:
1140 // empty
1141 { $$ = nullptr; }
1142 | assignment_expression
1143 ;
1144
1145assignment_operator:
1146 simple_assignment_operator
1147 | compound_assignment_operator
1148 ;
1149
1150simple_assignment_operator:
1151 '=' { $$ = OperKinds::Assign; }
1152 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1153 ;
1154
1155compound_assignment_operator:
1156 EXPassign { $$ = OperKinds::ExpAssn; }
1157 | MULTassign { $$ = OperKinds::MulAssn; }
1158 | DIVassign { $$ = OperKinds::DivAssn; }
1159 | MODassign { $$ = OperKinds::ModAssn; }
1160 | PLUSassign { $$ = OperKinds::PlusAssn; }
1161 | MINUSassign { $$ = OperKinds::MinusAssn; }
1162 | LSassign { $$ = OperKinds::LSAssn; }
1163 | RSassign { $$ = OperKinds::RSAssn; }
1164 | ANDassign { $$ = OperKinds::AndAssn; }
1165 | ERassign { $$ = OperKinds::ERAssn; }
1166 | ORassign { $$ = OperKinds::OrAssn; }
1167 ;
1168
1169tuple: // CFA, tuple
1170 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1171 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1172// '[' ']'
1173// { $$ = new ExpressionNode( build_tuple() ); }
1174// | '[' push assignment_expression pop ']'
1175// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1176 '[' ',' tuple_expression_list ']'
1177 { $$ = new ExpressionNode( build_tuple( yylloc, (new ExpressionNode( nullptr ))->set_last( $3 ) ) ); }
1178 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1179 { $$ = new ExpressionNode( build_tuple( yylloc, $3->set_last( $6 ) ) ); }
1180 ;
1181
1182tuple_expression_list:
1183 assignment_expression
1184 | '@' // CFA
1185 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1186 | tuple_expression_list ',' assignment_expression
1187 { $$ = $1->set_last( $3 ); }
1188 | tuple_expression_list ',' '@'
1189 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1190 ;
1191
1192comma_expression:
1193 assignment_expression
1194 | comma_expression ',' assignment_expression
1195 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1196 ;
1197
1198comma_expression_opt:
1199 // empty
1200 { $$ = nullptr; }
1201 | comma_expression
1202 ;
1203
1204// ************************** STATEMENTS *******************************
1205
1206statement:
1207 labeled_statement
1208 | compound_statement
1209 | expression_statement
1210 | selection_statement
1211 | iteration_statement
1212 | jump_statement
1213 | with_statement
1214 | mutex_statement
1215 | waitfor_statement
1216 | waituntil_statement
1217 | corun_statement
1218 | cofor_statement
1219 | exception_statement
1220 | enable_disable_statement
1221 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1222 | asm_statement
1223 | DIRECTIVE
1224 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1225 ;
1226
1227labeled_statement:
1228 // labels cannot be identifiers 0 or 1
1229 identifier_or_type_name ':' attribute_list_opt statement
1230 { $$ = $4->add_label( yylloc, $1, $3 ); }
1231 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1232 {
1233 SemanticError( yylloc, "syntx error, label \"%s\" must be associated with a statement, "
1234 "where a declaration, case, or default is not a statement.\n"
1235 "Move the label or terminate with a semicolon.", $1.str->c_str() );
1236 $$ = nullptr;
1237 }
1238 ;
1239
1240compound_statement:
1241 '{' '}'
1242 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1243 | '{' push
1244 local_label_declaration_opt // GCC, local labels appear at start of block
1245 statement_decl_list // C99, intermix declarations and statements
1246 pop '}'
1247 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1248 ;
1249
1250statement_decl_list: // C99
1251 statement_decl
1252 | statement_decl_list statement_decl
1253 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1254 ;
1255
1256statement_decl:
1257 declaration // CFA, new & old style declarations
1258 { $$ = new StatementNode( $1 ); }
1259 | EXTENSION declaration // GCC
1260 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1261 | function_definition
1262 { $$ = new StatementNode( $1 ); }
1263 | EXTENSION function_definition // GCC
1264 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1265 | statement
1266 ;
1267
1268statement_list_nodecl:
1269 statement
1270 | statement_list_nodecl statement
1271 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1272 | statement_list_nodecl error // invalid syntax rule
1273 { SemanticError( yylloc, "illegal syntax, declarations only allowed at the start of the switch body,"
1274 " i.e., after the '{'." ); $$ = nullptr; }
1275 ;
1276
1277expression_statement:
1278 comma_expression_opt ';'
1279 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1280 ;
1281
1282// "if", "switch", and "choose" require parenthesis around the conditional. See the following ambiguities without
1283// parenthesis:
1284//
1285// if x + y + z; => if ( x ) + y + z or if ( x + y ) + z
1286//
1287// switch O { }
1288//
1289// O{} => object-constructor for conditional, switch body ???
1290// O{} => O for conditional followed by switch body
1291//
1292// C++ has this problem, as it has the same constructor syntax.
1293//
1294// switch sizeof ( T ) { }
1295//
1296// sizeof ( T ) => sizeof of T for conditional followed by switch body
1297// sizeof ( T ) => sizeof of compound literal (T){ }, closing parenthesis ???
1298//
1299// Note the two grammar rules for sizeof (alignof)
1300//
1301// | SIZEOF unary_expression
1302// | SIZEOF '(' type_no_function ')'
1303//
1304// where the first DOES NOT require parenthesis! And C++ inherits this problem from C.
1305
1306selection_statement:
1307 IF '(' conditional_declaration ')' statement %prec THEN
1308 // explicitly deal with the shift/reduce conflict on if/else
1309 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1310 | IF '(' conditional_declaration ')' statement ELSE statement
1311 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1312 | SWITCH '(' comma_expression ')' case_clause
1313 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1314 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1315 {
1316 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1317 // The semantics of the declaration list is changed to include associated initialization, which is performed
1318 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1319 // statement around the switch. Statements after the initial declaration list can never be executed, and
1320 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1321 // statement.
1322 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1323 }
1324 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1325 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1326 | CHOOSE '(' comma_expression ')' case_clause // CFA
1327 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1328 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1329 {
1330 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1331 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1332 }
1333 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1334 { SemanticError( yylloc, "illegal syntax, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1335 ;
1336
1337conditional_declaration:
1338 comma_expression
1339 { $$ = new CondCtl( nullptr, $1 ); }
1340 | c_declaration // no semi-colon
1341 { $$ = new CondCtl( $1, nullptr ); }
1342 | cfa_declaration // no semi-colon
1343 { $$ = new CondCtl( $1, nullptr ); }
1344 | declaration comma_expression // semi-colon separated
1345 { $$ = new CondCtl( $1, $2 ); }
1346 ;
1347
1348// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1349// clause allows a list of values and subranges.
1350
1351case_value: // CFA
1352 constant_expression { $$ = $1; }
1353 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1354 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1355 | subrange // CFA, subrange
1356 ;
1357
1358case_value_list: // CFA
1359 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1360 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1361 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1362 ;
1363
1364case_label: // CFA
1365 CASE error // invalid syntax rule
1366 { SemanticError( yylloc, "illegal syntax, case list missing after case." ); $$ = nullptr; }
1367 | CASE case_value_list ':' { $$ = $2; }
1368 | CASE case_value_list error // invalid syntax rule
1369 { SemanticError( yylloc, "illegal syntax, colon missing after case list." ); $$ = nullptr; }
1370 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1371 // A semantic check is required to ensure only one default clause per switch/choose statement.
1372 | DEFAULT error // invalid syntax rule
1373 { SemanticError( yylloc, "illegal syntax, colon missing after default." ); $$ = nullptr; }
1374 ;
1375
1376case_label_list: // CFA
1377 case_label
1378 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1379 ;
1380
1381case_clause: // CFA
1382 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1383 ;
1384
1385switch_clause_list_opt: // CFA
1386 // empty
1387 { $$ = nullptr; }
1388 | switch_clause_list
1389 ;
1390
1391switch_clause_list: // CFA
1392 case_label_list statement_list_nodecl
1393 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1394 | switch_clause_list case_label_list statement_list_nodecl
1395 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1396 ;
1397
1398iteration_statement:
1399 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1400 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1401 | WHILE '(' ')' statement ELSE statement // CFA
1402 {
1403 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1404 SemanticWarning( yylloc, Warning::SuperfluousElse );
1405 }
1406 | WHILE '(' conditional_declaration ')' statement %prec THEN
1407 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1408 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1409 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1410 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1411 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1412 | DO statement WHILE '(' ')' ELSE statement // CFA
1413 {
1414 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1415 SemanticWarning( yylloc, Warning::SuperfluousElse );
1416 }
1417 | DO statement WHILE '(' comma_expression ')' ';'
1418 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1419 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1420 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1421 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1422 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1423 | FOR '(' ')' statement ELSE statement // CFA
1424 {
1425 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1426 SemanticWarning( yylloc, Warning::SuperfluousElse );
1427 }
1428 | FOR '(' for_control_expression_list ')' statement %prec THEN
1429 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1430 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1431 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1432 ;
1433
1434for_control_expression_list:
1435 for_control_expression
1436 | for_control_expression_list ':' for_control_expression
1437 // ForCtrl + ForCtrl:
1438 // init + init => multiple declaration statements that are hoisted
1439 // condition + condition => (expression) && (expression)
1440 // change + change => (expression), (expression)
1441 {
1442 $1->init->set_last( $3->init );
1443 if ( $1->condition ) {
1444 if ( $3->condition ) {
1445 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1446 } // if
1447 } else $1->condition = $3->condition;
1448 if ( $1->change ) {
1449 if ( $3->change ) {
1450 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1451 } // if
1452 } else $1->change = $3->change;
1453 $$ = $1;
1454 }
1455 ;
1456
1457for_control_expression:
1458 ';' comma_expression_opt ';' comma_expression_opt
1459 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1460 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1461 {
1462 $$ = new ForCtrl( $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr, $3, $5 );
1463 }
1464 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1465 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1466
1467 | '@' ';' comma_expression // CFA, empty loop-index
1468 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1469 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1470 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1471
1472 | comma_expression // CFA, anonymous loop-index
1473 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1474 | downupdowneq comma_expression // CFA, anonymous loop-index
1475 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1476
1477 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1478 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1479 | '@' updowneq comma_expression // CFA, anonymous loop-index
1480 {
1481 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1482 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1483 }
1484 | comma_expression updowneq '@' // CFA, anonymous loop-index
1485 {
1486 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1487 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1488 }
1489 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1490 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1491 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1492 {
1493 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1494 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1495 }
1496 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1497 {
1498 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1499 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1500 }
1501 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1502 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1503 | '@' updowneq '@' // CFA, invalid syntax rule
1504 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1505 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1506 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1507 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1508 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1509 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1510 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1511
1512 // These rules accept a comma_expression for the initialization, when only an identifier is correct. Being
1513 // permissive allows for a better error message from forCtrl.
1514 | comma_expression ';' comma_expression // CFA
1515 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1516 | comma_expression ';' downupdowneq comma_expression // CFA
1517 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1518
1519 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1520 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1521 | comma_expression ';' '@' updowneq comma_expression // CFA
1522 {
1523 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1524 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1525 }
1526 | comma_expression ';' comma_expression updowneq '@' // CFA
1527 {
1528 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1529 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1530 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1531 }
1532 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1533 { SemanticError( yylloc, "illegal syntax, missing low/high value for ascending/descending range so index is uninitialized." ); $$ = nullptr; }
1534
1535 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1536 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1537 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1538 {
1539 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1540 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1541 }
1542 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1543 {
1544 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1545 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1546 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1547 }
1548 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1549 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1550 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1551 {
1552 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1553 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1554 }
1555 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1556 {
1557 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1558 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1559 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1560 }
1561 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1562 { SemanticError( yylloc, "illegal syntax, missing low/high value for ascending/descending range so index is uninitialized." ); $$ = nullptr; }
1563
1564 | declaration comma_expression // CFA
1565 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1566 | declaration downupdowneq comma_expression // CFA
1567 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1568
1569 | declaration comma_expression updowneq comma_expression // CFA
1570 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1571 | declaration '@' updowneq comma_expression // CFA
1572 {
1573 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1574 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1575 }
1576 | declaration comma_expression updowneq '@' // CFA
1577 {
1578 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1579 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1580 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1581 }
1582
1583 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1584 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1585 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1586 {
1587 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1588 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1589 }
1590 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1591 {
1592 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1593 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1594 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1595 }
1596 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1597 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1598 | declaration '@' updowneq comma_expression '~' '@' // CFA
1599 {
1600 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1601 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, nullptr );
1602 }
1603 | declaration comma_expression updowneq '@' '~' '@' // CFA
1604 {
1605 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1606 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "illegal syntax, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1607 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1608 }
1609 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1610 { SemanticError( yylloc, "illegal syntax, missing low/high value for ascending/descending range so index is uninitialized." ); $$ = nullptr; }
1611
1612 | comma_expression ';' type_type_specifier // CFA, enum type
1613 {
1614 $$ = enumRangeCtrl( $1, OperKinds::LEThan, new ExpressionNode( new ast::TypeExpr( yylloc, $3->clone()->buildType() ) ), $3 );
1615 }
1616 | comma_expression ';' downupdowneq enum_key // CFA, enum type, reverse direction
1617 {
1618 if ( $3 == OperKinds::GThan ) {
1619 SemanticError( yylloc, "all enumeration ranges are equal (all values). Add an equal, e.g., ~=, -~=." ); $$ = nullptr;
1620 $3 = OperKinds::GEThan;
1621 } // if
1622 $$ = enumRangeCtrl( $1, $3, new ExpressionNode( new ast::TypeExpr( yylloc, $4->clone()->buildType() ) ), $4 );
1623 }
1624 ;
1625
1626enum_key:
1627 type_name
1628 { typedefTable.makeTypedef( *$1->symbolic.name, "enum_type_nobody 1" );
1629 $$ = DeclarationNode::newEnum( $1->symbolic.name, nullptr, false, false ); }
1630 | ENUM identifier
1631 { typedefTable.makeTypedef( *$2, "enum_type_nobody 2" );
1632 $$ = DeclarationNode::newEnum( $2, nullptr, false, false ); }
1633 | ENUM type_name
1634 { typedefTable.makeTypedef( *$2->symbolic.name, "enum_type_nobody 3" );
1635 $$ = DeclarationNode::newEnum( $2->symbolic.name, nullptr, false, false ); }
1636 ;
1637
1638// This rule exists to handle the ambiguity with unary operator '~'. The rule is the same as updowneq minus the '~'.
1639// Specifically, "for ( ~5 )" means the complement of 5, not loop 0..4. Hence, in this case "for ( ~= 5 )", i.e., 0..5,
1640// it is not possible to just remove the '='. The entire '~=' must be removed.
1641downupdowneq:
1642 ErangeUp
1643 { $$ = OperKinds::LThan; }
1644 | ErangeDown
1645 { $$ = OperKinds::GThan; }
1646 | ErangeUpEq
1647 { $$ = OperKinds::LEThan; }
1648 | ErangeDownEq
1649 { $$ = OperKinds::GEThan; }
1650 ;
1651
1652updown:
1653 '~' // shorthand 0 ~ 10 => 0 +~ 10
1654 { $$ = OperKinds::LThan; }
1655 | ErangeUp
1656 { $$ = OperKinds::LThan; }
1657 | ErangeDown
1658 { $$ = OperKinds::GThan; }
1659 ;
1660
1661updowneq:
1662 updown
1663 | ErangeUpEq
1664 { $$ = OperKinds::LEThan; }
1665 | ErangeDownEq
1666 { $$ = OperKinds::GEThan; }
1667 ;
1668
1669jump_statement:
1670 GOTO identifier_or_type_name ';'
1671 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1672 | GOTO '*' comma_expression ';' // GCC, computed goto
1673 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1674 // whereas normal operator precedence yields goto (*i)+3;
1675 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1676 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1677 | fall_through_name ';' // CFA
1678 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1679 | fall_through_name identifier_or_type_name ';' // CFA
1680 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1681 | fall_through_name DEFAULT ';' // CFA
1682 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1683 | CONTINUE ';'
1684 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1685 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1686 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1687 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1688 // the target of the transfer appears only at the start of an iteration statement.
1689 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1690 | BREAK ';'
1691 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1692 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1693 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1694 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1695 // the target of the transfer appears only at the start of an iteration statement.
1696 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1697 | RETURN comma_expression_opt ';'
1698 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1699 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1700 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1701 | SUSPEND ';'
1702 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1703 | SUSPEND compound_statement
1704 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1705 | SUSPEND COROUTINE ';'
1706 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1707 | SUSPEND COROUTINE compound_statement
1708 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1709 | SUSPEND GENERATOR ';'
1710 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1711 | SUSPEND GENERATOR compound_statement
1712 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1713 | THROW assignment_expression_opt ';' // handles rethrow
1714 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1715 | THROWRESUME assignment_expression_opt ';' // handles reresume
1716 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1717 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1718 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1719 ;
1720
1721fall_through_name: // CFA
1722 FALLTHRU
1723 | FALLTHROUGH
1724 ;
1725
1726with_statement:
1727 WITH '(' type_list ')' statement // support scoped enumeration
1728 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1729 ;
1730
1731// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1732mutex_statement:
1733 MUTEX '(' argument_expression_list_opt ')' statement
1734 {
1735 if ( ! $3 ) { SemanticError( yylloc, "illegal syntax, mutex argument list cannot be empty." ); $$ = nullptr; }
1736 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1737 }
1738 ;
1739
1740when_clause:
1741 WHEN '(' comma_expression ')' { $$ = $3; }
1742 ;
1743
1744when_clause_opt:
1745 // empty
1746 { $$ = nullptr; }
1747 | when_clause
1748 ;
1749
1750cast_expression_list:
1751 cast_expression
1752 | cast_expression_list ',' cast_expression
1753 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1754 ;
1755
1756timeout:
1757 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1758 ;
1759
1760wor:
1761 OROR
1762 | WOR
1763
1764waitfor:
1765 WAITFOR '(' cast_expression ')'
1766 { $$ = $3; }
1767 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1768 { $$ = $3->set_last( $5 ); }
1769 ;
1770
1771wor_waitfor_clause:
1772 when_clause_opt waitfor statement %prec THEN
1773 // Called first: create header for WaitForStmt.
1774 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1775 | wor_waitfor_clause wor when_clause_opt waitfor statement
1776 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1777 | wor_waitfor_clause wor when_clause_opt ELSE statement
1778 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1779 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1780 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1781 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1782 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1783 { SemanticError( yylloc, "illegal syntax, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1784 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1785 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1786 ;
1787
1788waitfor_statement:
1789 wor_waitfor_clause %prec THEN
1790 { $$ = new StatementNode( $1 ); }
1791 ;
1792
1793wand:
1794 ANDAND
1795 | WAND
1796 ;
1797
1798waituntil:
1799 WAITUNTIL '(' comma_expression ')'
1800 { $$ = $3; }
1801 ;
1802
1803waituntil_clause:
1804 when_clause_opt waituntil statement
1805 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1806 | '(' wor_waituntil_clause ')'
1807 { $$ = $2; }
1808 ;
1809
1810wand_waituntil_clause:
1811 waituntil_clause %prec THEN
1812 { $$ = $1; }
1813 | waituntil_clause wand wand_waituntil_clause
1814 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1815 ;
1816
1817wor_waituntil_clause:
1818 wand_waituntil_clause
1819 { $$ = $1; }
1820 | wor_waituntil_clause wor wand_waituntil_clause
1821 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1822 | wor_waituntil_clause wor when_clause_opt ELSE statement
1823 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1824 ;
1825
1826waituntil_statement:
1827 wor_waituntil_clause %prec THEN
1828 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1829 ;
1830
1831corun_statement:
1832 CORUN statement
1833 { $$ = new StatementNode( build_corun( yylloc, $2 ) ); }
1834 ;
1835
1836cofor_statement:
1837 COFOR '(' for_control_expression_list ')' statement
1838 { $$ = new StatementNode( build_cofor( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1839 ;
1840
1841exception_statement:
1842 TRY compound_statement handler_clause %prec THEN
1843 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1844 | TRY compound_statement finally_clause
1845 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1846 | TRY compound_statement handler_clause finally_clause
1847 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1848 ;
1849
1850handler_clause:
1851 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1852 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1853 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1854 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1855 ;
1856
1857handler_predicate_opt:
1858 // empty
1859 { $$ = nullptr; }
1860 | ';' conditional_expression { $$ = $2; }
1861 ;
1862
1863handler_key:
1864 CATCH { $$ = ast::Terminate; }
1865 | RECOVER { $$ = ast::Terminate; }
1866 | CATCHRESUME { $$ = ast::Resume; }
1867 | FIXUP { $$ = ast::Resume; }
1868 ;
1869
1870finally_clause:
1871 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1872 ;
1873
1874exception_declaration:
1875 // No SUE declaration in parameter list.
1876 type_specifier_nobody
1877 | type_specifier_nobody declarator
1878 { $$ = $2->addType( $1 ); }
1879 | type_specifier_nobody variable_abstract_declarator
1880 { $$ = $2->addType( $1 ); }
1881 | cfa_abstract_declarator_tuple identifier // CFA
1882 { $$ = $1->addName( $2 ); }
1883 | cfa_abstract_declarator_tuple // CFA
1884 ;
1885
1886enable_disable_statement:
1887 enable_disable_key identifier_list compound_statement
1888 ;
1889
1890enable_disable_key:
1891 ENABLE
1892 | DISABLE
1893 ;
1894
1895asm_statement:
1896 ASM asm_volatile_opt '(' string_literal ')' ';'
1897 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1898 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1899 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1900 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1901 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1902 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1903 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1904 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1905 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1906 ;
1907
1908asm_volatile_opt: // GCC
1909 // empty
1910 { $$ = false; }
1911 | VOLATILE
1912 { $$ = true; }
1913 ;
1914
1915asm_operands_opt: // GCC
1916 // empty
1917 { $$ = nullptr; } // use default argument
1918 | asm_operands_list
1919 ;
1920
1921asm_operands_list: // GCC
1922 asm_operand
1923 | asm_operands_list ',' asm_operand
1924 { $$ = $1->set_last( $3 ); }
1925 ;
1926
1927asm_operand: // GCC
1928 string_literal '(' constant_expression ')'
1929 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1930 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1931 {
1932 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1933 delete $2.str;
1934 }
1935 ;
1936
1937asm_clobbers_list_opt: // GCC
1938 // empty
1939 { $$ = nullptr; } // use default argument
1940 | string_literal
1941 { $$ = $1; }
1942 | asm_clobbers_list_opt ',' string_literal
1943 { $$ = $1->set_last( $3 ); }
1944 ;
1945
1946label_list:
1947 identifier
1948 {
1949 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1950 delete $1; // allocated by lexer
1951 }
1952 | label_list ',' identifier
1953 {
1954 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1955 delete $3; // allocated by lexer
1956 }
1957 ;
1958
1959// ****************************** DECLARATIONS *********************************
1960
1961declaration_list_opt: // used at beginning of switch statement
1962 // empty
1963 { $$ = nullptr; }
1964 | declaration_list
1965 ;
1966
1967declaration_list:
1968 declaration
1969 | declaration_list declaration
1970 { $$ = $1->set_last( $2 ); }
1971 ;
1972
1973KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1974 // empty
1975 { $$ = nullptr; }
1976 | KR_parameter_list
1977 ;
1978
1979KR_parameter_list:
1980 c_declaration ';'
1981 { $$ = $1; }
1982 | KR_parameter_list c_declaration ';'
1983 { $$ = $1->set_last( $2 ); }
1984 ;
1985
1986local_label_declaration_opt: // GCC, local label
1987 // empty
1988 | local_label_declaration_list
1989 ;
1990
1991local_label_declaration_list: // GCC, local label
1992 LABEL local_label_list ';'
1993 | local_label_declaration_list LABEL local_label_list ';'
1994 ;
1995
1996local_label_list: // GCC, local label
1997 identifier_or_type_name
1998 | local_label_list ',' identifier_or_type_name
1999 ;
2000
2001declaration: // old & new style declarations
2002 c_declaration ';'
2003 | cfa_declaration ';' // CFA
2004 | static_assert ';' // C11
2005 ;
2006
2007static_assert:
2008 STATICASSERT '(' constant_expression ',' string_literal ')' // C11
2009 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
2010 | STATICASSERT '(' constant_expression ')' // CFA
2011 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
2012
2013// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
2014// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
2015// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
2016// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
2017// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
2018// block, but cannot be mixed within a specific declaration.
2019//
2020// CFA C
2021// [10] int x; int x[10]; // array of 10 integers
2022// [10] * char y; char *y[10]; // array of 10 pointers to char
2023
2024cfa_declaration: // CFA
2025 cfa_variable_declaration
2026 | cfa_typedef_declaration
2027 | cfa_function_declaration
2028 | type_declaring_list
2029 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
2030 | trait_specifier
2031 ;
2032
2033cfa_variable_declaration: // CFA
2034 cfa_variable_specifier initializer_opt
2035 { $$ = $1->addInitializer( $2 ); }
2036 | declaration_qualifier_list cfa_variable_specifier initializer_opt
2037 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
2038 // them as a type_qualifier cannot appear in that context.
2039 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
2040 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
2041 { $$ = $1->set_last( $1->cloneType( $5 )->addInitializer( $6 ) ); }
2042 ;
2043
2044cfa_variable_specifier: // CFA
2045 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2046 // storage-class
2047 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
2048 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2049 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
2050 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2051 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
2052 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
2053
2054 // [ int s, int t ]; // declare s and t
2055 // [ int, int ] f();
2056 // [] g( int );
2057 // [ int x, int y ] = f(); // declare x and y, initialize each from f
2058 // g( x + y );
2059 | cfa_function_return asm_name_opt
2060 { SemanticError( yylloc, "tuple-element declarations is currently unimplemented." ); $$ = nullptr; }
2061 | type_qualifier_list cfa_function_return asm_name_opt
2062 { SemanticError( yylloc, "tuple variable declaration is currently unimplemented." ); $$ = nullptr; }
2063 ;
2064
2065cfa_function_declaration: // CFA
2066 cfa_function_specifier
2067 | type_qualifier_list cfa_function_specifier
2068 { $$ = $2->addQualifiers( $1 ); }
2069 | declaration_qualifier_list cfa_function_specifier
2070 { $$ = $2->addQualifiers( $1 ); }
2071 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
2072 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
2073 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')'
2074 {
2075 // Append the return type at the start (left-hand-side) to each identifier in the list.
2076 DeclarationNode * ret = new DeclarationNode;
2077 ret->type = maybeCopy( $1->type->base );
2078 $$ = $1->set_last( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
2079 }
2080 ;
2081
2082cfa_function_specifier: // CFA
2083 '[' ']' identifier '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2084 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2085 | '[' ']' TYPEDEFname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2086 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2087 // | '[' ']' TYPEGENname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2088 // { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2089
2090 // identifier_or_type_name must be broken apart because of the sequence:
2091 //
2092 // '[' ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
2093 // '[' ']' type_specifier
2094 //
2095 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
2096 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
2097 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2098 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
2099 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2100 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2101 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2102 ;
2103
2104cfa_function_return: // CFA
2105 '[' push cfa_parameter_list pop ']'
2106 { $$ = DeclarationNode::newTuple( $3 ); }
2107 | '[' push cfa_parameter_list ',' cfa_abstract_parameter_list pop ']'
2108 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
2109 { $$ = DeclarationNode::newTuple( $3->set_last( $5 ) ); }
2110 ;
2111
2112cfa_typedef_declaration: // CFA
2113 TYPEDEF cfa_variable_specifier
2114 {
2115 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
2116 $$ = $2->addTypedef();
2117 }
2118 | TYPEDEF cfa_function_specifier
2119 {
2120 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2121 $$ = $2->addTypedef();
2122 }
2123 | cfa_typedef_declaration ',' identifier
2124 {
2125 typedefTable.addToEnclosingScope( *$3, TYPEDEFname, "cfa_typedef_declaration 3" );
2126 $$ = $1->set_last( $1->cloneType( $3 ) );
2127 }
2128 ;
2129
2130// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2131// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2132
2133typedef_declaration:
2134 TYPEDEF type_specifier declarator
2135 {
2136 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2137 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2138 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2139 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2140 }
2141 | typedef_declaration ',' declarator
2142 {
2143 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2144 $$ = $1->set_last( $1->cloneBaseType( $3 )->addTypedef() );
2145 }
2146 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2147 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2148 | type_specifier TYPEDEF declarator
2149 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2150 | type_specifier TYPEDEF type_qualifier_list declarator
2151 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2152 ;
2153
2154typedef_expression:
2155 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2156 TYPEDEF identifier '=' assignment_expression
2157 {
2158 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2159 }
2160 | typedef_expression ',' identifier '=' assignment_expression
2161 {
2162 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2163 }
2164 ;
2165
2166c_declaration:
2167 declaration_specifier declaring_list
2168 { $$ = distAttr( $1, $2 ); }
2169 | typedef_declaration
2170 | typedef_expression // deprecated GCC, naming expression type
2171 | sue_declaration_specifier
2172 {
2173 assert( $1->type );
2174 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2175 SemanticError( yylloc, "illegal syntax, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2176 }
2177 // enums are never empty declarations because there must have at least one enumeration.
2178 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2179 SemanticError( yylloc, "illegal syntax, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2180 }
2181 }
2182 ;
2183
2184declaring_list:
2185 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2186 // storage-class
2187 variable_declarator asm_name_opt initializer_opt
2188 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2189 | variable_type_redeclarator asm_name_opt initializer_opt
2190 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2191
2192 | general_function_declarator asm_name_opt
2193 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2194 | general_function_declarator asm_name_opt '=' VOID
2195 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2196
2197 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2198 { $$ = $1->set_last( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2199 ;
2200
2201general_function_declarator:
2202 function_type_redeclarator
2203 | function_declarator
2204 ;
2205
2206declaration_specifier: // type specifier + storage class
2207 basic_declaration_specifier
2208 | type_declaration_specifier
2209 | sue_declaration_specifier
2210 | sue_declaration_specifier invalid_types // invalid syntax rule
2211 {
2212 SemanticError( yylloc, "illegal syntax, expecting ';' at end of \"%s\" declaration.",
2213 ast::AggregateDecl::aggrString( $1->type->aggregate.kind ) );
2214 $$ = nullptr;
2215 }
2216 ;
2217
2218invalid_types:
2219 aggregate_key
2220 | basic_type_name
2221 | indirect_type
2222 ;
2223
2224declaration_specifier_nobody: // type specifier + storage class - {...}
2225 // Preclude SUE declarations in restricted scopes:
2226 //
2227 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2228 //
2229 // because it is impossible to call f due to name equivalence.
2230 basic_declaration_specifier
2231 | sue_declaration_specifier_nobody
2232 | type_declaration_specifier
2233 ;
2234
2235type_specifier: // type specifier
2236 basic_type_specifier
2237 | sue_type_specifier
2238 | type_type_specifier
2239 ;
2240
2241type_specifier_nobody: // type specifier - {...}
2242 // Preclude SUE declarations in restricted scopes:
2243 //
2244 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2245 //
2246 // because it is impossible to call f due to name equivalence.
2247 basic_type_specifier
2248 | sue_type_specifier_nobody
2249 | type_type_specifier
2250 ;
2251
2252type_qualifier_list_opt: // GCC, used in asm_statement
2253 // empty
2254 { $$ = nullptr; }
2255 | type_qualifier_list
2256 ;
2257
2258type_qualifier_list:
2259 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2260 //
2261 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2262 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2263 // appeared only once.
2264 type_qualifier
2265 | type_qualifier_list type_qualifier
2266 { $$ = $1->addQualifiers( $2 ); }
2267 ;
2268
2269type_qualifier:
2270 type_qualifier_name
2271 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2272 | attribute // trick handles most attribute locations
2273 ;
2274
2275type_qualifier_name:
2276 CONST
2277 { $$ = build_type_qualifier( ast::CV::Const ); }
2278 | RESTRICT
2279 { $$ = build_type_qualifier( ast::CV::Restrict ); }
2280 | VOLATILE
2281 { $$ = build_type_qualifier( ast::CV::Volatile ); }
2282 | ATOMIC
2283 { $$ = build_type_qualifier( ast::CV::Atomic ); }
2284
2285 // forall is a CV qualifier because it can appear in places where SC qualifiers are disallowed.
2286 //
2287 // void foo( forall( T ) T (*)( T ) ); // forward declaration
2288 // void bar( static int ); // static disallowed (gcc/CFA)
2289 | forall
2290 { $$ = build_forall( $1 ); }
2291 ;
2292
2293forall:
2294 FORALL '(' type_parameter_list ')' // CFA
2295 { $$ = $3; }
2296 ;
2297
2298declaration_qualifier_list:
2299 storage_class_list
2300 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2301 { $$ = $1->addQualifiers( $2 ); }
2302 | declaration_qualifier_list type_qualifier_list storage_class_list
2303 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2304 ;
2305
2306storage_class_list:
2307 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2308 // only one of each is specified, except for inline, which can appear with the others.
2309 //
2310 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2311 // specifiers in a declaration.
2312 storage_class
2313 | storage_class_list storage_class
2314 { $$ = $1->addQualifiers( $2 ); }
2315 ;
2316
2317storage_class:
2318 EXTERN
2319 { $$ = DeclarationNode::newStorageClass( ast::Storage::Extern ); }
2320 | STATIC
2321 { $$ = DeclarationNode::newStorageClass( ast::Storage::Static ); }
2322 | AUTO
2323 { $$ = DeclarationNode::newStorageClass( ast::Storage::Auto ); }
2324 | REGISTER
2325 { $$ = DeclarationNode::newStorageClass( ast::Storage::Register ); }
2326 | THREADLOCALGCC // GCC
2327 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalGcc ); }
2328 | THREADLOCALC11 // C11
2329 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalC11 ); }
2330 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2331 | INLINE // C99
2332 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Inline ); }
2333 | FORTRAN // C99
2334 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Fortran ); }
2335 | NORETURN // C11
2336 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Noreturn ); }
2337 ;
2338
2339basic_type_name:
2340 basic_type_name_type
2341 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2342 ;
2343
2344// Just an intermediate value for conversion.
2345basic_type_name_type:
2346 VOID
2347 { $$ = build_basic_type( TypeData::Void ); }
2348 | BOOL // C99
2349 { $$ = build_basic_type( TypeData::Bool ); }
2350 | CHAR
2351 { $$ = build_basic_type( TypeData::Char ); }
2352 | INT
2353 { $$ = build_basic_type( TypeData::Int ); }
2354 | INT128
2355 { $$ = build_basic_type( TypeData::Int128 ); }
2356 | UINT128
2357 { $$ = addType( build_basic_type( TypeData::Int128 ), build_signedness( TypeData::Unsigned ) ); }
2358 | FLOAT
2359 { $$ = build_basic_type( TypeData::Float ); }
2360 | DOUBLE
2361 { $$ = build_basic_type( TypeData::Double ); }
2362 | uuFLOAT80
2363 { $$ = build_basic_type( TypeData::uuFloat80 ); }
2364 | uuFLOAT128
2365 { $$ = build_basic_type( TypeData::uuFloat128 ); }
2366 | uFLOAT16
2367 { $$ = build_basic_type( TypeData::uFloat16 ); }
2368 | uFLOAT32
2369 { $$ = build_basic_type( TypeData::uFloat32 ); }
2370 | uFLOAT32X
2371 { $$ = build_basic_type( TypeData::uFloat32x ); }
2372 | uFLOAT64
2373 { $$ = build_basic_type( TypeData::uFloat64 ); }
2374 | uFLOAT64X
2375 { $$ = build_basic_type( TypeData::uFloat64x ); }
2376 | uFLOAT128
2377 { $$ = build_basic_type( TypeData::uFloat128 ); }
2378 | DECIMAL32
2379 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2380 | DECIMAL64
2381 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2382 | DECIMAL128
2383 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2384 | COMPLEX // C99
2385 { $$ = build_complex_type( TypeData::Complex ); }
2386 | IMAGINARY // C99
2387 { $$ = build_complex_type( TypeData::Imaginary ); }
2388 | SIGNED
2389 { $$ = build_signedness( TypeData::Signed ); }
2390 | UNSIGNED
2391 { $$ = build_signedness( TypeData::Unsigned ); }
2392 | SHORT
2393 { $$ = build_length( TypeData::Short ); }
2394 | LONG
2395 { $$ = build_length( TypeData::Long ); }
2396 | VA_LIST // GCC, __builtin_va_list
2397 { $$ = build_builtin_type( TypeData::Valist ); }
2398 | AUTO_TYPE
2399 { $$ = build_builtin_type( TypeData::AutoType ); }
2400 | vtable
2401 ;
2402
2403vtable_opt:
2404 // empty
2405 { $$ = nullptr; }
2406 | vtable
2407 ;
2408
2409vtable:
2410 VTABLE '(' type_name ')' default_opt
2411 { $$ = build_vtable_type( $3 ); }
2412 ;
2413
2414default_opt:
2415 // empty
2416 { $$ = nullptr; }
2417 | DEFAULT
2418 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2419 ;
2420
2421basic_declaration_specifier:
2422 // A semantic check is necessary for conflicting storage classes.
2423 basic_type_specifier
2424 | declaration_qualifier_list basic_type_specifier
2425 { $$ = $2->addQualifiers( $1 ); }
2426 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2427 { $$ = $1->addQualifiers( $2 ); }
2428 | basic_declaration_specifier storage_class type_qualifier_list
2429 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2430 | basic_declaration_specifier storage_class basic_type_specifier
2431 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2432 ;
2433
2434basic_type_specifier:
2435 direct_type
2436 // Cannot have type modifiers, e.g., short, long, etc.
2437 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2438 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2439 ;
2440
2441direct_type:
2442 basic_type_name
2443 | type_qualifier_list basic_type_name
2444 { $$ = $2->addQualifiers( $1 ); }
2445 | direct_type type_qualifier
2446 { $$ = $1->addQualifiers( $2 ); }
2447 | direct_type basic_type_name
2448 { $$ = $1->addType( $2 ); }
2449 ;
2450
2451indirect_type:
2452 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2453 { $$ = $3; }
2454 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2455 { $$ = DeclarationNode::newTypeof( $3 ); }
2456 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2457 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2458 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2459 { $$ = DeclarationNode::newTypeof( $3, true ); }
2460 | ZERO_T // CFA
2461 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::Zero ) ); }
2462 | ONE_T // CFA
2463 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::One ) ); }
2464 ;
2465
2466sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2467 sue_type_specifier
2468 | declaration_qualifier_list sue_type_specifier
2469 { $$ = $2->addQualifiers( $1 ); }
2470 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2471 { $$ = $1->addQualifiers( $2 ); }
2472 | sue_declaration_specifier storage_class type_qualifier_list
2473 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2474 ;
2475
2476sue_type_specifier: // struct, union, enum + type specifier
2477 elaborated_type
2478 | type_qualifier_list
2479 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2480 elaborated_type
2481 { $$ = $3->addQualifiers( $1 ); }
2482 | sue_type_specifier type_qualifier
2483 {
2484 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2485 $$ = $1->addQualifiers( $2 );
2486 }
2487 ;
2488
2489sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2490 sue_type_specifier_nobody
2491 | declaration_qualifier_list sue_type_specifier_nobody
2492 { $$ = $2->addQualifiers( $1 ); }
2493 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2494 { $$ = $1->addQualifiers( $2 ); }
2495 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2496 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2497 ;
2498
2499sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2500 elaborated_type_nobody
2501 | type_qualifier_list elaborated_type_nobody
2502 { $$ = $2->addQualifiers( $1 ); }
2503 | sue_type_specifier_nobody type_qualifier
2504 { $$ = $1->addQualifiers( $2 ); }
2505 ;
2506
2507type_declaration_specifier:
2508 type_type_specifier
2509 | declaration_qualifier_list type_type_specifier
2510 { $$ = $2->addQualifiers( $1 ); }
2511 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2512 { $$ = $1->addQualifiers( $2 ); }
2513 | type_declaration_specifier storage_class type_qualifier_list
2514 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2515 ;
2516
2517type_type_specifier: // typedef types
2518 type_name
2519 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2520 | type_qualifier_list type_name
2521 { $$ = DeclarationNode::newFromTypeData( $2 )->addQualifiers( $1 ); }
2522 | type_type_specifier type_qualifier
2523 { $$ = $1->addQualifiers( $2 ); }
2524 ;
2525
2526type_name:
2527 TYPEDEFname
2528 { $$ = build_typedef( $1 ); }
2529 | '.' TYPEDEFname
2530 { $$ = build_qualified_type( build_global_scope(), build_typedef( $2 ) ); }
2531 | type_name '.' TYPEDEFname
2532 { $$ = build_qualified_type( $1, build_typedef( $3 ) ); }
2533 | typegen_name
2534 | '.' typegen_name
2535 { $$ = build_qualified_type( build_global_scope(), $2 ); }
2536 | type_name '.' typegen_name
2537 { $$ = build_qualified_type( $1, $3 ); }
2538 ;
2539
2540typegen_name: // CFA
2541 TYPEGENname
2542 { $$ = build_type_gen( $1, nullptr ); }
2543 | TYPEGENname '(' ')'
2544 { $$ = build_type_gen( $1, nullptr ); }
2545 | TYPEGENname '(' type_list ')'
2546 { $$ = build_type_gen( $1, $3 ); }
2547 ;
2548
2549elaborated_type: // struct, union, enum
2550 aggregate_type
2551 | enum_type
2552 ;
2553
2554elaborated_type_nobody: // struct, union, enum - {...}
2555 aggregate_type_nobody
2556 | enum_type_nobody
2557 ;
2558
2559// ************************** AGGREGATE *******************************
2560
2561aggregate_type: // struct, union
2562 aggregate_key attribute_list_opt
2563 { forall = false; } // reset
2564 '{' field_declaration_list_opt '}' type_parameters_opt
2565 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2566 | aggregate_key attribute_list_opt identifier
2567 {
2568 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2569 forall = false; // reset
2570 }
2571 '{' field_declaration_list_opt '}' type_parameters_opt
2572 {
2573 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2574 }
2575 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2576 {
2577 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2578 forall = false; // reset
2579 }
2580 '{' field_declaration_list_opt '}' type_parameters_opt
2581 {
2582 DeclarationNode::newFromTypeData( build_typedef( $3 ) );
2583 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2584 }
2585 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2586 {
2587 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2588 forall = false; // reset
2589 }
2590 '{' field_declaration_list_opt '}' type_parameters_opt
2591 {
2592 DeclarationNode::newFromTypeData( build_type_gen( $3, nullptr ) );
2593 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2594 }
2595 | aggregate_type_nobody
2596 ;
2597
2598type_parameters_opt:
2599 // empty
2600 { $$ = nullptr; } %prec '}'
2601 | '(' type_list ')'
2602 { $$ = $2; }
2603 ;
2604
2605aggregate_type_nobody: // struct, union - {...}
2606 aggregate_key attribute_list_opt identifier
2607 {
2608 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2609 forall = false; // reset
2610 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2611 }
2612 | aggregate_key attribute_list_opt type_name
2613 {
2614 forall = false; // reset
2615 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2616 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2617 // delete newFromTypeGen.
2618 if ( $3->kind == TypeData::SymbolicInst && ! $3->symbolic.isTypedef ) {
2619 $$ = DeclarationNode::newFromTypeData( $3 )->addQualifiers( $2 );
2620 } else {
2621 $$ = DeclarationNode::newAggregate( $1, $3->symbolic.name, $3->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2622 $3->symbolic.name = nullptr; // copied to $$
2623 $3->symbolic.actuals = nullptr;
2624 delete $3;
2625 }
2626 }
2627 ;
2628
2629aggregate_key:
2630 aggregate_data
2631 | aggregate_control
2632 ;
2633
2634aggregate_data:
2635 STRUCT vtable_opt
2636 { $$ = ast::AggregateDecl::Struct; }
2637 | UNION
2638 { $$ = ast::AggregateDecl::Union; }
2639 | EXCEPTION // CFA
2640 { $$ = ast::AggregateDecl::Exception; }
2641 ;
2642
2643aggregate_control: // CFA
2644 MONITOR
2645 { $$ = ast::AggregateDecl::Monitor; }
2646 | MUTEX STRUCT
2647 { $$ = ast::AggregateDecl::Monitor; }
2648 | GENERATOR
2649 { $$ = ast::AggregateDecl::Generator; }
2650 | MUTEX GENERATOR
2651 {
2652 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2653 $$ = ast::AggregateDecl::NoAggregate;
2654 }
2655 | COROUTINE
2656 { $$ = ast::AggregateDecl::Coroutine; }
2657 | MUTEX COROUTINE
2658 {
2659 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2660 $$ = ast::AggregateDecl::NoAggregate;
2661 }
2662 | THREAD
2663 { $$ = ast::AggregateDecl::Thread; }
2664 | MUTEX THREAD
2665 {
2666 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2667 $$ = ast::AggregateDecl::NoAggregate;
2668 }
2669 ;
2670
2671field_declaration_list_opt:
2672 // empty
2673 { $$ = nullptr; }
2674 | field_declaration_list_opt field_declaration
2675 { $$ = $1 ? $1->set_last( $2 ) : $2; }
2676 ;
2677
2678field_declaration:
2679 type_specifier field_declaring_list_opt ';'
2680 {
2681 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2682 $$ = fieldDecl( $1, $2 );
2683 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2684 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2685 // printf( "\tattr %s\n", attr->name.c_str() );
2686 // } // for
2687 }
2688 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2689 {
2690 SemanticError( yylloc, "illegal syntax, expecting ';' at end of previous declaration." );
2691 $$ = nullptr;
2692 }
2693 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2694 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2695 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2696 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2697 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2698 {
2699 if ( ! $3 ) { // field declarator ?
2700 $3 = DeclarationNode::newName( nullptr );
2701 } // if
2702 $3->inLine = true;
2703 $$ = distAttr( $2, $3 ); // mark all fields in list
2704 distInl( $3 );
2705 }
2706 | INLINE aggregate_control ';' // CFA
2707 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2708 | typedef_declaration ';' // CFA
2709 | cfa_field_declaring_list ';' // CFA, new style field declaration
2710 | EXTENSION cfa_field_declaring_list ';' // GCC
2711 { distExt( $2 ); $$ = $2; } // mark all fields in list
2712 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2713 { $$ = $2; } // mark all fields in list
2714 | cfa_typedef_declaration ';' // CFA
2715 | static_assert ';' // C11
2716 ;
2717
2718field_declaring_list_opt:
2719 // empty
2720 { $$ = nullptr; }
2721 | field_declarator
2722 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2723 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2724 ;
2725
2726field_declarator:
2727 bit_subrange_size // C special case, no field name
2728 { $$ = DeclarationNode::newBitfield( $1 ); }
2729 | variable_declarator bit_subrange_size_opt
2730 // A semantic check is required to ensure bit_subrange only appears on integral types.
2731 { $$ = $1->addBitfield( $2 ); }
2732 | variable_type_redeclarator bit_subrange_size_opt
2733 // A semantic check is required to ensure bit_subrange only appears on integral types.
2734 { $$ = $1->addBitfield( $2 ); }
2735 | function_type_redeclarator bit_subrange_size_opt
2736 // A semantic check is required to ensure bit_subrange only appears on integral types.
2737 { $$ = $1->addBitfield( $2 ); }
2738 ;
2739
2740field_abstract_list_opt:
2741 // empty
2742 { $$ = nullptr; }
2743 | field_abstract
2744 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2745 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2746 ;
2747
2748field_abstract:
2749 // no bit fields
2750 variable_abstract_declarator
2751 ;
2752
2753cfa_field_declaring_list: // CFA, new style field declaration
2754 // bit-fields are handled by C declarations
2755 cfa_abstract_declarator_tuple identifier_or_type_name
2756 { $$ = $1->addName( $2 ); }
2757 | cfa_field_declaring_list ',' identifier_or_type_name
2758 { $$ = $1->set_last( $1->cloneType( $3 ) ); }
2759 ;
2760
2761cfa_field_abstract_list: // CFA, new style field declaration
2762 // bit-fields are handled by C declarations
2763 cfa_abstract_declarator_tuple
2764 | cfa_field_abstract_list ','
2765 { $$ = $1->set_last( $1->cloneType( 0 ) ); }
2766 ;
2767
2768bit_subrange_size_opt:
2769 // empty
2770 { $$ = nullptr; }
2771 | bit_subrange_size
2772 ;
2773
2774bit_subrange_size:
2775 ':' assignment_expression
2776 { $$ = $2; }
2777 ;
2778
2779// ************************** ENUMERATION *******************************
2780
2781enum_type:
2782 // anonymous, no type name
2783 ENUM attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2784 {
2785 if ( $3 == EnumHiding::Hide ) {
2786 SemanticError( yylloc, "illegal syntax, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2787 } // if
2788 $$ = DeclarationNode::newEnum( nullptr, $5, true, false )->addQualifiers( $2 );
2789 }
2790 | ENUM enumerator_type attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2791 {
2792 if ( $2 && ($2->storageClasses.val != 0 || $2->type->qualifiers.any()) ) {
2793 SemanticError( yylloc, "illegal syntax, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2794 }
2795 if ( $4 == EnumHiding::Hide ) {
2796 SemanticError( yylloc, "illegal syntax, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2797 } // if
2798 $$ = DeclarationNode::newEnum( nullptr, $6, true, true, $2 )->addQualifiers( $3 );
2799 }
2800
2801 // named type
2802 | ENUM attribute_list_opt identifier
2803 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2804 hide_opt '{' enumerator_list comma_opt '}'
2805 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2806 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2807 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2808 | ENUM enumerator_type attribute_list_opt identifier attribute_list_opt
2809 {
2810 if ( $2 && ($2->storageClasses.any() || $2->type->qualifiers.val != 0) ) {
2811 SemanticError( yylloc, "illegal syntax, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2812 }
2813 typedefTable.makeTypedef( *$4, "enum_type 2" );
2814 }
2815 hide_opt '{' enumerator_list comma_opt '}'
2816 { $$ = DeclarationNode::newEnum( $4, $9, true, true, $2, $7 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2817 | ENUM enumerator_type attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2818 { $$ = DeclarationNode::newEnum( $4->name, $8, true, true, $2, $6 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2819
2820 // forward declaration
2821 | enum_type_nobody
2822 ;
2823
2824enumerator_type:
2825 '(' ')' // pure enumeration
2826 { $$ = nullptr; }
2827 | '(' cfa_abstract_parameter_declaration ')' // typed enumeration
2828 { $$ = $2; }
2829 ;
2830
2831hide_opt:
2832 // empty
2833 { $$ = EnumHiding::Visible; }
2834 | '!'
2835 { $$ = EnumHiding::Hide; }
2836 ;
2837
2838enum_type_nobody: // enum - {...}
2839 ENUM attribute_list_opt identifier
2840 {
2841 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2842 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2843 }
2844 | ENUM attribute_list_opt type_name
2845 {
2846 typedefTable.makeTypedef( *$3->symbolic.name, "enum_type_nobody 2" );
2847 $$ = DeclarationNode::newEnum( $3->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2848 }
2849 ;
2850
2851enumerator_list:
2852 visible_hide_opt identifier_or_type_name enumerator_value_opt
2853 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2854 | INLINE type_name
2855 {
2856 $$ = DeclarationNode::newEnumInLine( $2->symbolic.name );
2857 $2->symbolic.name = nullptr;
2858 delete $2;
2859 }
2860 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2861 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2862 | enumerator_list ',' INLINE type_name
2863 { $$ = $1->set_last( DeclarationNode::newEnumInLine( $4->symbolic.name ) ); }
2864 ;
2865
2866visible_hide_opt:
2867 hide_opt
2868 | '^'
2869 { $$ = EnumHiding::Visible; }
2870 ;
2871
2872enumerator_value_opt:
2873 // empty
2874 { $$ = nullptr; }
2875 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2876 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2877 // | simple_assignment_operator initializer
2878 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2879 ;
2880
2881// ************************** FUNCTION PARAMETERS *******************************
2882
2883parameter_list_ellipsis_opt:
2884 // empty
2885 { $$ = nullptr; }
2886 | ELLIPSIS
2887 { $$ = nullptr; }
2888 | parameter_list
2889 | parameter_list ',' ELLIPSIS
2890 { $$ = $1->addVarArgs(); }
2891 ;
2892
2893parameter_list: // abstract + real
2894 parameter_declaration
2895 | abstract_parameter_declaration
2896 | parameter_list ',' parameter_declaration
2897 { $$ = $1->set_last( $3 ); }
2898 | parameter_list ',' abstract_parameter_declaration
2899 { $$ = $1->set_last( $3 ); }
2900 ;
2901
2902cfa_parameter_list_ellipsis_opt: // CFA, abstract + real
2903 // empty
2904 { $$ = DeclarationNode::newFromTypeData( build_basic_type( TypeData::Void ) ); }
2905 | ELLIPSIS
2906 { $$ = nullptr; }
2907 | cfa_parameter_list
2908 | cfa_abstract_parameter_list
2909 | cfa_parameter_list ',' cfa_abstract_parameter_list
2910 { $$ = $1->set_last( $3 ); }
2911 | cfa_parameter_list ',' ELLIPSIS
2912 { $$ = $1->addVarArgs(); }
2913 | cfa_abstract_parameter_list ',' ELLIPSIS
2914 { $$ = $1->addVarArgs(); }
2915 ;
2916
2917cfa_parameter_list: // CFA
2918 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2919 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2920 cfa_parameter_declaration
2921 | cfa_abstract_parameter_list ',' cfa_parameter_declaration
2922 { $$ = $1->set_last( $3 ); }
2923 | cfa_parameter_list ',' cfa_parameter_declaration
2924 { $$ = $1->set_last( $3 ); }
2925 | cfa_parameter_list ',' cfa_abstract_parameter_list ',' cfa_parameter_declaration
2926 { $$ = $1->set_last( $3 )->set_last( $5 ); }
2927 ;
2928
2929cfa_abstract_parameter_list: // CFA, new & old style abstract
2930 cfa_abstract_parameter_declaration
2931 | cfa_abstract_parameter_list ',' cfa_abstract_parameter_declaration
2932 { $$ = $1->set_last( $3 ); }
2933 ;
2934
2935// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2936// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2937
2938parameter_declaration:
2939 // No SUE declaration in parameter list.
2940 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2941 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2942 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2943 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2944 ;
2945
2946abstract_parameter_declaration:
2947 declaration_specifier_nobody default_initializer_opt
2948 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2949 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2950 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2951 ;
2952
2953cfa_parameter_declaration: // CFA, new & old style parameter declaration
2954 parameter_declaration
2955 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2956 { $$ = $1->addName( $2 ); }
2957 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2958 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2959 { $$ = $1->addName( $2 ); }
2960 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2961 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2962 | cfa_function_specifier // int f( "int fp()" );
2963 ;
2964
2965cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2966 abstract_parameter_declaration
2967 | cfa_identifier_parameter_declarator_no_tuple
2968 | cfa_abstract_tuple
2969 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2970 | type_qualifier_list cfa_abstract_tuple
2971 { $$ = $2->addQualifiers( $1 ); }
2972 | cfa_abstract_function // int f( "int ()" );
2973 ;
2974
2975// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2976// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2977// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2978
2979identifier_list: // K&R-style parameter list => no types
2980 identifier
2981 { $$ = DeclarationNode::newName( $1 ); }
2982 | identifier_list ',' identifier
2983 { $$ = $1->set_last( DeclarationNode::newName( $3 ) ); }
2984 ;
2985
2986type_no_function: // sizeof, alignof, cast (constructor)
2987 cfa_abstract_declarator_tuple // CFA
2988 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2989 | type_specifier abstract_declarator
2990 { $$ = $2->addType( $1 ); }
2991 ;
2992
2993type: // typeof, assertion
2994 type_no_function
2995 | cfa_abstract_function // CFA
2996 ;
2997
2998initializer_opt:
2999 // empty
3000 { $$ = nullptr; }
3001 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
3002 | '=' VOID { $$ = new InitializerNode( true ); }
3003 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
3004 ;
3005
3006initializer:
3007 assignment_expression { $$ = new InitializerNode( $1 ); }
3008 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
3009 ;
3010
3011initializer_list_opt:
3012 // empty
3013 { $$ = nullptr; }
3014 | initializer
3015 | designation initializer { $$ = $2->set_designators( $1 ); }
3016 | initializer_list_opt ',' initializer { $$ = $1->set_last( $3 ); }
3017 | initializer_list_opt ',' designation initializer { $$ = $1->set_last( $4->set_designators( $3 ) ); }
3018 ;
3019
3020// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
3021// '=' to separator the designator from the initializer value, as in:
3022//
3023// int x[10] = { [1] = 3 };
3024//
3025// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
3026// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
3027// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
3028// shift/reduce conflicts
3029
3030designation:
3031 designator_list ':' // C99, CFA uses ":" instead of "="
3032 | identifier_at ':' // GCC, field name
3033 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
3034 ;
3035
3036designator_list: // C99
3037 designator
3038 | designator_list designator
3039 { $$ = $1->set_last( $2 ); }
3040 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
3041 ;
3042
3043designator:
3044 '.' identifier_at // C99, field name
3045 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
3046 | '[' push assignment_expression pop ']' // C99, single array element
3047 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
3048 { $$ = $3; }
3049 | '[' push subrange pop ']' // CFA, multiple array elements
3050 { $$ = $3; }
3051 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
3052 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
3053 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
3054 { $$ = $4; }
3055 ;
3056
3057// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
3058// rather than an object-oriented type system. This required four groups of extensions:
3059//
3060// Overloading: function, data, and operator identifiers may be overloaded.
3061//
3062// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
3063// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
3064// definitions of new types. Type declarations with storage class "extern" provide opaque types.
3065//
3066// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
3067// site. A polymorphic function is not a template; it is a function, with an address and a type.
3068//
3069// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
3070// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
3071// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
3072// types provide the operations declared by a specification. Assertions are normally used to declare requirements
3073// on type arguments of polymorphic functions.
3074
3075type_parameter_list: // CFA
3076 type_parameter
3077 | type_parameter_list ',' type_parameter
3078 { $$ = $1->set_last( $3 ); }
3079 ;
3080
3081type_initializer_opt: // CFA
3082 // empty
3083 { $$ = nullptr; }
3084 | '=' type
3085 { $$ = $2; }
3086 ;
3087
3088type_parameter: // CFA
3089 type_class identifier_or_type_name
3090 {
3091 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
3092 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
3093 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
3094 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
3095 }
3096 type_initializer_opt assertion_list_opt
3097 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3098 | identifier_or_type_name new_type_class
3099 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
3100 type_initializer_opt assertion_list_opt
3101 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3102 | '[' identifier_or_type_name ']'
3103 {
3104 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
3105 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
3106 }
3107 // | type_specifier identifier_parameter_declarator
3108 | assertion_list
3109 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
3110 | ENUM '(' identifier_or_type_name ')' identifier_or_type_name new_type_class type_initializer_opt assertion_list_opt
3111 {
3112 typedefTable.addToScope( *$3, TYPEDIMname, "type_parameter 4" );
3113 typedefTable.addToScope( *$5, TYPEDIMname, "type_parameter 5" );
3114 $$ = DeclarationNode::newTypeParam( $6, $5 )->addTypeInitializer( $7 )->addAssertions( $8 );
3115 }
3116 ;
3117
3118new_type_class: // CFA
3119 // empty
3120 { $$ = ast::TypeDecl::Otype; }
3121 | '&'
3122 { $$ = ast::TypeDecl::Dtype; }
3123 | '*'
3124 { $$ = ast::TypeDecl::DStype; } // Dtype + sized
3125 // | '(' '*' ')' // Gregor made me do it
3126 // { $$ = ast::TypeDecl::Ftype; }
3127 | ELLIPSIS
3128 { $$ = ast::TypeDecl::Ttype; }
3129 ;
3130
3131type_class: // CFA
3132 OTYPE
3133 { $$ = ast::TypeDecl::Otype; }
3134 | DTYPE
3135 { $$ = ast::TypeDecl::Dtype; }
3136 | FTYPE
3137 { $$ = ast::TypeDecl::Ftype; }
3138 | TTYPE
3139 { $$ = ast::TypeDecl::Ttype; }
3140 ;
3141
3142assertion_list_opt: // CFA
3143 // empty
3144 { $$ = nullptr; }
3145 | assertion_list
3146 ;
3147
3148assertion_list: // CFA
3149 assertion
3150 | assertion_list assertion
3151 { $$ = $1->set_last( $2 ); }
3152 ;
3153
3154assertion: // CFA
3155 '|' identifier_or_type_name '(' type_list ')'
3156 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3157 | '|' '{' push trait_declaration_list pop '}'
3158 { $$ = $4; }
3159 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3160 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3161 ;
3162
3163type_list: // CFA
3164 type
3165 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3166 | assignment_expression
3167 | type_list ',' type
3168 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3169 | type_list ',' assignment_expression
3170 { $$ = $1->set_last( $3 ); }
3171 ;
3172
3173type_declaring_list: // CFA
3174 OTYPE type_declarator
3175 { $$ = $2; }
3176 | storage_class_list OTYPE type_declarator
3177 { $$ = $3->addQualifiers( $1 ); }
3178 | type_declaring_list ',' type_declarator
3179 { $$ = $1->set_last( $3->copySpecifiers( $1 ) ); }
3180 ;
3181
3182type_declarator: // CFA
3183 type_declarator_name assertion_list_opt
3184 { $$ = $1->addAssertions( $2 ); }
3185 | type_declarator_name assertion_list_opt '=' type
3186 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3187 ;
3188
3189type_declarator_name: // CFA
3190 identifier_or_type_name
3191 {
3192 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3193 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3194 }
3195 | identifier_or_type_name '(' type_parameter_list ')'
3196 {
3197 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3198 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3199 }
3200 ;
3201
3202trait_specifier: // CFA
3203 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3204 {
3205 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3206 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3207 }
3208 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3209 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3210 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3211 {
3212 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3213 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3214 }
3215 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3216 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3217 ;
3218
3219trait_declaration_list: // CFA
3220 trait_declaration
3221 | trait_declaration_list pop push trait_declaration
3222 { $$ = $1->set_last( $4 ); }
3223 ;
3224
3225trait_declaration: // CFA
3226 cfa_trait_declaring_list ';'
3227 | trait_declaring_list ';'
3228 ;
3229
3230cfa_trait_declaring_list: // CFA
3231 cfa_variable_specifier
3232 | cfa_function_specifier
3233 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3234 { $$ = $1->set_last( $1->cloneType( $5 ) ); }
3235 ;
3236
3237trait_declaring_list: // CFA
3238 type_specifier declarator
3239 { $$ = $2->addType( $1 ); }
3240 | trait_declaring_list pop ',' push declarator
3241 { $$ = $1->set_last( $1->cloneBaseType( $5 ) ); }
3242 ;
3243
3244// **************************** EXTERNAL DEFINITIONS *****************************
3245
3246translation_unit:
3247 // empty, input file
3248 | external_definition_list
3249 { parseTree = parseTree ? parseTree->set_last( $1 ) : $1; }
3250 ;
3251
3252external_definition_list:
3253 push external_definition pop
3254 { $$ = $2; }
3255 | external_definition_list push external_definition pop
3256 { $$ = $1 ? $1->set_last( $3 ) : $3; }
3257 ;
3258
3259external_definition_list_opt:
3260 // empty
3261 { $$ = nullptr; }
3262 | external_definition_list
3263 ;
3264
3265up:
3266 { typedefTable.up( forall ); forall = false; }
3267 ;
3268
3269down:
3270 { typedefTable.down(); }
3271 ;
3272
3273external_definition:
3274 DIRECTIVE
3275 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3276 | declaration
3277 {
3278 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3279 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3280 // disallowed at the moment.
3281 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static &&
3282 $1->type && $1->type->kind == TypeData::AggregateInst ) {
3283 if ( $1->type->aggInst.aggregate->aggregate.anon ) {
3284 SemanticError( yylloc, "extern anonymous aggregate is currently unimplemented." ); $$ = nullptr;
3285 }
3286 }
3287 }
3288 | IDENTIFIER IDENTIFIER
3289 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3290 | IDENTIFIER type_qualifier // invalid syntax rule
3291 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3292 | IDENTIFIER storage_class // invalid syntax rule
3293 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3294 | IDENTIFIER basic_type_name // invalid syntax rule
3295 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3296 | IDENTIFIER TYPEDEFname // invalid syntax rule
3297 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3298 | IDENTIFIER TYPEGENname // invalid syntax rule
3299 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3300 | external_function_definition
3301 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3302 {
3303 distExt( $2 ); // mark all fields in list
3304 $$ = $2;
3305 }
3306 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3307 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3308 | EXTERN STRINGliteral
3309 {
3310 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3311 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3312 }
3313 up external_definition down
3314 {
3315 linkage = linkageStack.top();
3316 linkageStack.pop();
3317 $$ = $5;
3318 }
3319 | EXTERN STRINGliteral // C++-style linkage specifier
3320 {
3321 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3322 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3323 }
3324 '{' up external_definition_list_opt down '}'
3325 {
3326 linkage = linkageStack.top();
3327 linkageStack.pop();
3328 $$ = $6;
3329 }
3330 // global distribution
3331 | type_qualifier_list
3332 {
3333 if ( $1->type->qualifiers.any() ) {
3334 SemanticError( yylloc, "illegal syntax, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3335 }
3336 if ( $1->type->forall ) forall = true; // remember generic type
3337 }
3338 '{' up external_definition_list_opt down '}' // CFA, namespace
3339 {
3340 distQual( $5, $1 );
3341 forall = false;
3342 $$ = $5;
3343 }
3344 | declaration_qualifier_list
3345 {
3346 if ( $1->type && $1->type->qualifiers.any() ) {
3347 SemanticError( yylloc, "illegal syntax, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3348 }
3349 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3350 }
3351 '{' up external_definition_list_opt down '}' // CFA, namespace
3352 {
3353 distQual( $5, $1 );
3354 forall = false;
3355 $$ = $5;
3356 }
3357 | declaration_qualifier_list type_qualifier_list
3358 {
3359 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3360 SemanticError( yylloc, "illegal syntax, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3361 }
3362 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3363 }
3364 '{' up external_definition_list_opt down '}' // CFA, namespace
3365 {
3366 distQual( $6, $1->addQualifiers( $2 ) );
3367 forall = false;
3368 $$ = $6;
3369 }
3370 | ';' // empty declaration
3371 { $$ = nullptr; }
3372 ;
3373
3374external_function_definition:
3375 function_definition
3376 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3377 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3378 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3379 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3380 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3381 | function_declarator compound_statement
3382 { $$ = $1->addFunctionBody( $2 ); }
3383 | KR_function_declarator KR_parameter_list_opt compound_statement
3384 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3385 ;
3386
3387with_clause_opt:
3388 // empty
3389 { $$ = nullptr; forall = false; }
3390 | WITH '(' type_list ')' attribute_list_opt // support scoped enumeration
3391 {
3392 $$ = $3; forall = false;
3393 if ( $5 ) {
3394 SemanticError( yylloc, "illegal syntax, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3395 $$ = nullptr;
3396 } // if
3397 }
3398 ;
3399
3400function_definition:
3401 cfa_function_declaration with_clause_opt compound_statement // CFA
3402 {
3403 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3404 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3405 $1->get_last()->addFunctionBody( $3, $2 );
3406 $$ = $1;
3407 }
3408 | declaration_specifier function_declarator with_clause_opt compound_statement
3409 {
3410 rebindForall( $1, $2 );
3411 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3412 }
3413 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3414 {
3415 rebindForall( $1, $2 );
3416 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3417 }
3418 // handles default int return type, OBSOLESCENT (see 1)
3419 | type_qualifier_list function_declarator with_clause_opt compound_statement
3420 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3421 // handles default int return type, OBSOLESCENT (see 1)
3422 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3423 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3424 // handles default int return type, OBSOLESCENT (see 1)
3425 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3426 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3427
3428 // Old-style K&R function definition, OBSOLESCENT (see 4)
3429 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3430 {
3431 rebindForall( $1, $2 );
3432 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3433 }
3434 // handles default int return type, OBSOLESCENT (see 1)
3435 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3436 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3437 // handles default int return type, OBSOLESCENT (see 1)
3438 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3439 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3440 // handles default int return type, OBSOLESCENT (see 1)
3441 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3442 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3443 ;
3444
3445declarator:
3446 variable_declarator
3447 | variable_type_redeclarator
3448 | function_declarator
3449 | function_type_redeclarator
3450 ;
3451
3452subrange:
3453 constant_expression '~' constant_expression // CFA, integer subrange
3454 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3455 ;
3456
3457// **************************** ASM *****************************
3458
3459asm_name_opt: // GCC
3460 // empty
3461 { $$ = nullptr; }
3462 | ASM '(' string_literal ')' attribute_list_opt
3463 {
3464 DeclarationNode * name = new DeclarationNode();
3465 name->asmName = maybeMoveBuild( $3 );
3466 $$ = name->addQualifiers( $5 );
3467 }
3468 ;
3469
3470// **************************** ATTRIBUTE *****************************
3471
3472attribute_list_opt: // GCC
3473 // empty
3474 { $$ = nullptr; }
3475 | attribute_list
3476 ;
3477
3478attribute_list: // GCC
3479 attribute
3480 | attribute_list attribute
3481 { $$ = $2->addQualifiers( $1 ); }
3482 ;
3483
3484attribute: // GCC
3485 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3486 { $$ = $4; }
3487 | ATTRIBUTE '(' attribute_name_list ')' // CFA
3488 { $$ = $3; }
3489 | ATTR '(' attribute_name_list ')' // CFA
3490 { $$ = $3; }
3491 ;
3492
3493attribute_name_list: // GCC
3494 attribute_name
3495 | attribute_name_list ',' attribute_name
3496 { $$ = $3->addQualifiers( $1 ); }
3497 ;
3498
3499attribute_name: // GCC
3500 // empty
3501 { $$ = nullptr; }
3502 | attr_name
3503 { $$ = DeclarationNode::newAttribute( $1 ); }
3504 | attr_name '(' argument_expression_list_opt ')'
3505 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3506 ;
3507
3508attr_name: // GCC
3509 identifier_or_type_name
3510 | FALLTHROUGH
3511 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3512 | CONST
3513 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3514 ;
3515
3516// ============================================================================
3517// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3518// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3519// in:
3520//
3521// int (*f())[10] { ... };
3522// ... (*f())[3] += 1; // definition mimics usage
3523//
3524// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3525// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3526// ============================================================================
3527
3528// ----------------------------------------------------------------------------
3529// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3530// to define a variable or function prototype, e.g.:
3531//
3532// valid declaration invalid definition
3533// ----------------- ------------------
3534// int f; int f {}
3535// int *f; int *f {}
3536// int f[10]; int f[10] {}
3537// int (*f)(int); int (*f)(int) {}
3538//
3539// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3540// variable_declarator and function_declarator.
3541// ----------------------------------------------------------------------------
3542
3543// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3544// declaring an array of functions versus a pointer to an array of functions.
3545
3546paren_identifier:
3547 identifier_at
3548 { $$ = DeclarationNode::newName( $1 ); }
3549 | '?' identifier
3550 // { SemanticError( yylloc, "keyword parameter is currently unimplemented." ); $$ = nullptr; }
3551 { $$ = DeclarationNode::newName( $2 ); }
3552 | '(' paren_identifier ')' // redundant parenthesis
3553 { $$ = $2; }
3554 ;
3555
3556variable_declarator:
3557 paren_identifier attribute_list_opt
3558 { $$ = $1->addQualifiers( $2 ); }
3559 | variable_ptr
3560 | variable_array attribute_list_opt
3561 { $$ = $1->addQualifiers( $2 ); }
3562 | variable_function attribute_list_opt
3563 { $$ = $1->addQualifiers( $2 ); }
3564 ;
3565
3566variable_ptr:
3567 ptrref_operator variable_declarator
3568 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3569 | ptrref_operator type_qualifier_list variable_declarator
3570 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3571 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3572 { $$ = $2->addQualifiers( $4 ); }
3573 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3574 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3575 ;
3576
3577variable_array:
3578 paren_identifier array_dimension
3579 { $$ = $1->addArray( $2 ); }
3580 | '(' variable_ptr ')' array_dimension
3581 { $$ = $2->addArray( $4 ); }
3582 | '(' attribute_list variable_ptr ')' array_dimension
3583 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3584 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3585 { $$ = $2->addArray( $4 ); }
3586 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3587 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3588 | '(' variable_array ')' // redundant parenthesis
3589 { $$ = $2; }
3590 | '(' attribute_list variable_array ')' // redundant parenthesis
3591 { $$ = $3->addQualifiers( $2 ); }
3592 ;
3593
3594variable_function:
3595 '(' variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3596 { $$ = $2->addParamList( $5 ); }
3597 | '(' attribute_list variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3598 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3599 | '(' variable_function ')' // redundant parenthesis
3600 { $$ = $2; }
3601 | '(' attribute_list variable_function ')' // redundant parenthesis
3602 { $$ = $3->addQualifiers( $2 ); }
3603 ;
3604
3605// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3606// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3607// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3608
3609function_declarator:
3610 function_no_ptr attribute_list_opt
3611 { $$ = $1->addQualifiers( $2 ); }
3612 | function_ptr
3613 | function_array attribute_list_opt
3614 { $$ = $1->addQualifiers( $2 ); }
3615 ;
3616
3617function_no_ptr:
3618 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3619 { $$ = $1->addParamList( $3 ); }
3620 | '(' function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3621 { $$ = $2->addParamList( $5 ); }
3622 | '(' attribute_list function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3623 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3624 | '(' function_no_ptr ')' // redundant parenthesis
3625 { $$ = $2; }
3626 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3627 { $$ = $3->addQualifiers( $2 ); }
3628 ;
3629
3630function_ptr:
3631 ptrref_operator function_declarator
3632 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3633 | ptrref_operator type_qualifier_list function_declarator
3634 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3635 | '(' function_ptr ')' attribute_list_opt
3636 { $$ = $2->addQualifiers( $4 ); }
3637 | '(' attribute_list function_ptr ')' attribute_list_opt
3638 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3639 ;
3640
3641function_array:
3642 '(' function_ptr ')' array_dimension
3643 { $$ = $2->addArray( $4 ); }
3644 | '(' attribute_list function_ptr ')' array_dimension
3645 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3646 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3647 { $$ = $2->addArray( $4 ); }
3648 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3649 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3650 | '(' function_array ')' // redundant parenthesis
3651 { $$ = $2; }
3652 | '(' attribute_list function_array ')' // redundant parenthesis
3653 { $$ = $3->addQualifiers( $2 ); }
3654 ;
3655
3656// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3657//
3658// f( a, b, c ) int a, *b, c[]; {}
3659//
3660// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3661// returning arrays and functions versus pointers to arrays and functions.
3662
3663KR_function_declarator:
3664 KR_function_no_ptr
3665 | KR_function_ptr
3666 | KR_function_array
3667 ;
3668
3669KR_function_no_ptr:
3670 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3671 { $$ = $1->addIdList( $3 ); }
3672 | '(' KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3673 { $$ = $2->addParamList( $5 ); }
3674 | '(' attribute_list KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3675 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3676 | '(' KR_function_no_ptr ')' // redundant parenthesis
3677 { $$ = $2; }
3678 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3679 { $$ = $3->addQualifiers( $2 ); }
3680 ;
3681
3682KR_function_ptr:
3683 ptrref_operator KR_function_declarator
3684 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3685 | ptrref_operator type_qualifier_list KR_function_declarator
3686 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3687 | '(' KR_function_ptr ')'
3688 { $$ = $2; }
3689 | '(' attribute_list KR_function_ptr ')'
3690 { $$ = $3->addQualifiers( $2 ); }
3691 ;
3692
3693KR_function_array:
3694 '(' KR_function_ptr ')' array_dimension
3695 { $$ = $2->addArray( $4 ); }
3696 | '(' attribute_list KR_function_ptr ')' array_dimension
3697 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3698 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3699 { $$ = $2->addArray( $4 ); }
3700 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3701 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3702 | '(' KR_function_array ')' // redundant parenthesis
3703 { $$ = $2; }
3704 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3705 { $$ = $3->addQualifiers( $2 ); }
3706 ;
3707
3708// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3709//
3710// typedef int foo;
3711// {
3712// int foo; // redefine typedef name in new scope
3713// }
3714
3715paren_type:
3716 typedef_name
3717 {
3718 // hide type name in enclosing scope by variable name
3719 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3720 }
3721 | '(' paren_type ')'
3722 { $$ = $2; }
3723 ;
3724
3725variable_type_redeclarator:
3726 paren_type attribute_list_opt
3727 { $$ = $1->addQualifiers( $2 ); }
3728 | variable_type_ptr
3729 | variable_type_array attribute_list_opt
3730 { $$ = $1->addQualifiers( $2 ); }
3731 | variable_type_function attribute_list_opt
3732 { $$ = $1->addQualifiers( $2 ); }
3733 ;
3734
3735variable_type_ptr:
3736 ptrref_operator variable_type_redeclarator
3737 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3738 | ptrref_operator type_qualifier_list variable_type_redeclarator
3739 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3740 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3741 { $$ = $2->addQualifiers( $4 ); }
3742 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3743 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3744 ;
3745
3746variable_type_array:
3747 paren_type array_dimension
3748 { $$ = $1->addArray( $2 ); }
3749 | '(' variable_type_ptr ')' array_dimension
3750 { $$ = $2->addArray( $4 ); }
3751 | '(' attribute_list variable_type_ptr ')' array_dimension
3752 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3753 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3754 { $$ = $2->addArray( $4 ); }
3755 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3756 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3757 | '(' variable_type_array ')' // redundant parenthesis
3758 { $$ = $2; }
3759 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3760 { $$ = $3->addQualifiers( $2 ); }
3761 ;
3762
3763variable_type_function:
3764 '(' variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3765 { $$ = $2->addParamList( $5 ); }
3766 | '(' attribute_list variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3767 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3768 | '(' variable_type_function ')' // redundant parenthesis
3769 { $$ = $2; }
3770 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3771 { $$ = $3->addQualifiers( $2 ); }
3772 ;
3773
3774// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3775// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3776// arrays and functions.
3777
3778function_type_redeclarator:
3779 function_type_no_ptr attribute_list_opt
3780 { $$ = $1->addQualifiers( $2 ); }
3781 | function_type_ptr
3782 | function_type_array attribute_list_opt
3783 { $$ = $1->addQualifiers( $2 ); }
3784 ;
3785
3786function_type_no_ptr:
3787 paren_type '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3788 { $$ = $1->addParamList( $3 ); }
3789 | '(' function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3790 { $$ = $2->addParamList( $5 ); }
3791 | '(' attribute_list function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3792 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3793 | '(' function_type_no_ptr ')' // redundant parenthesis
3794 { $$ = $2; }
3795 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3796 { $$ = $3->addQualifiers( $2 ); }
3797 ;
3798
3799function_type_ptr:
3800 ptrref_operator function_type_redeclarator
3801 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3802 | ptrref_operator type_qualifier_list function_type_redeclarator
3803 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3804 | '(' function_type_ptr ')' attribute_list_opt
3805 { $$ = $2->addQualifiers( $4 ); }
3806 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3807 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3808 ;
3809
3810function_type_array:
3811 '(' function_type_ptr ')' array_dimension
3812 { $$ = $2->addArray( $4 ); }
3813 | '(' attribute_list function_type_ptr ')' array_dimension
3814 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3815 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3816 { $$ = $2->addArray( $4 ); }
3817 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3818 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3819 | '(' function_type_array ')' // redundant parenthesis
3820 { $$ = $2; }
3821 | '(' attribute_list function_type_array ')' // redundant parenthesis
3822 { $$ = $3->addQualifiers( $2 ); }
3823 ;
3824
3825// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3826// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3827// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3828// pointers to arrays and functions.
3829
3830identifier_parameter_declarator:
3831 paren_identifier attribute_list_opt
3832 { $$ = $1->addQualifiers( $2 ); }
3833 | '&' MUTEX paren_identifier attribute_list_opt
3834 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3835 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3836 | identifier_parameter_ptr
3837 | identifier_parameter_array attribute_list_opt
3838 { $$ = $1->addQualifiers( $2 ); }
3839 | identifier_parameter_function attribute_list_opt
3840 { $$ = $1->addQualifiers( $2 ); }
3841 ;
3842
3843identifier_parameter_ptr:
3844 ptrref_operator identifier_parameter_declarator
3845 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3846 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3847 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3848 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3849 { $$ = $2->addQualifiers( $4 ); }
3850 ;
3851
3852identifier_parameter_array:
3853 paren_identifier array_parameter_dimension
3854 { $$ = $1->addArray( $2 ); }
3855 | '(' identifier_parameter_ptr ')' array_dimension
3856 { $$ = $2->addArray( $4 ); }
3857 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3858 { $$ = $2->addArray( $4 ); }
3859 | '(' identifier_parameter_array ')' // redundant parenthesis
3860 { $$ = $2; }
3861 ;
3862
3863identifier_parameter_function:
3864 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3865 { $$ = $1->addParamList( $3 ); }
3866 | '(' identifier_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3867 { $$ = $2->addParamList( $5 ); }
3868 | '(' identifier_parameter_function ')' // redundant parenthesis
3869 { $$ = $2; }
3870 ;
3871
3872// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3873// e.g.:
3874//
3875// typedef int foo;
3876// forall( otype T ) struct foo;
3877// int f( int foo ); // redefine typedef name in new scope
3878//
3879// and allows the C99 array options, which can only appear in a parameter list.
3880
3881type_parameter_redeclarator:
3882 typedef_name attribute_list_opt
3883 { $$ = $1->addQualifiers( $2 ); }
3884 | '&' MUTEX typedef_name attribute_list_opt
3885 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3886 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3887 | type_parameter_ptr
3888 | type_parameter_array attribute_list_opt
3889 { $$ = $1->addQualifiers( $2 ); }
3890 | type_parameter_function attribute_list_opt
3891 { $$ = $1->addQualifiers( $2 ); }
3892 ;
3893
3894typedef_name:
3895 TYPEDEFname
3896 { $$ = DeclarationNode::newName( $1 ); }
3897 | TYPEGENname
3898 { $$ = DeclarationNode::newName( $1 ); }
3899 ;
3900
3901type_parameter_ptr:
3902 ptrref_operator type_parameter_redeclarator
3903 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3904 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3905 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3906 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3907 { $$ = $2->addQualifiers( $4 ); }
3908 ;
3909
3910type_parameter_array:
3911 typedef_name array_parameter_dimension
3912 { $$ = $1->addArray( $2 ); }
3913 | '(' type_parameter_ptr ')' array_parameter_dimension
3914 { $$ = $2->addArray( $4 ); }
3915 ;
3916
3917type_parameter_function:
3918 typedef_name '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3919 { $$ = $1->addParamList( $3 ); }
3920 | '(' type_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3921 { $$ = $2->addParamList( $5 ); }
3922 ;
3923
3924// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3925// which the type applies, e.g.:
3926//
3927// sizeof( int );
3928// sizeof( int * );
3929// sizeof( int [10] );
3930// sizeof( int (*)() );
3931// sizeof( int () );
3932//
3933// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3934// and functions versus pointers to arrays and functions.
3935
3936abstract_declarator:
3937 abstract_ptr
3938 | abstract_array attribute_list_opt
3939 { $$ = $1->addQualifiers( $2 ); }
3940 | abstract_function attribute_list_opt
3941 { $$ = $1->addQualifiers( $2 ); }
3942 ;
3943
3944abstract_ptr:
3945 ptrref_operator
3946 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3947 | ptrref_operator type_qualifier_list
3948 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3949 | ptrref_operator abstract_declarator
3950 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3951 | ptrref_operator type_qualifier_list abstract_declarator
3952 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3953 | '(' abstract_ptr ')' attribute_list_opt
3954 { $$ = $2->addQualifiers( $4 ); }
3955 ;
3956
3957abstract_array:
3958 array_dimension
3959 | '(' abstract_ptr ')' array_dimension
3960 { $$ = $2->addArray( $4 ); }
3961 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3962 { $$ = $2->addArray( $4 ); }
3963 | '(' abstract_array ')' // redundant parenthesis
3964 { $$ = $2; }
3965 ;
3966
3967abstract_function:
3968 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3969 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3970 | '(' abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3971 { $$ = $2->addParamList( $5 ); }
3972 | '(' abstract_function ')' // redundant parenthesis
3973 { $$ = $2; }
3974 ;
3975
3976array_dimension:
3977 // Only the first dimension can be empty.
3978 '[' ']'
3979 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3980 | '[' ']' multi_array_dimension
3981 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3982 // Cannot use constant_expression because of tuples => semantic check
3983 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3984 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3985 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3986
3987 // If needed, the following parses and does not use comma_expression, so the array structure can be built.
3988 // | '[' push assignment_expression pop ',' push array_dimension_list pop ']' // CFA
3989
3990 | '[' push array_type_list pop ']' // CFA
3991 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3992 | multi_array_dimension
3993 ;
3994
3995// array_dimension_list:
3996// assignment_expression
3997// | array_dimension_list ',' assignment_expression
3998// ;
3999
4000array_type_list:
4001 basic_type_name
4002 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
4003 | type_name
4004 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
4005 | assignment_expression upupeq assignment_expression
4006 | array_type_list ',' basic_type_name
4007 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
4008 | array_type_list ',' type_name
4009 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
4010 | array_type_list ',' assignment_expression upupeq assignment_expression
4011 ;
4012
4013upupeq:
4014 '~'
4015 { $$ = OperKinds::LThan; }
4016 | ErangeUpEq
4017 { $$ = OperKinds::LEThan; }
4018 ;
4019
4020multi_array_dimension:
4021 '[' push assignment_expression pop ']'
4022 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
4023 | '[' push '*' pop ']' // C99
4024 { $$ = DeclarationNode::newVarArray( 0 ); }
4025 | multi_array_dimension '[' push assignment_expression pop ']'
4026 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
4027 | multi_array_dimension '[' push '*' pop ']' // C99
4028 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
4029 ;
4030
4031// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
4032// identifier to which the type applies, e.g.:
4033//
4034// int f( int ); // not handled here
4035// int f( int * ); // abstract function-prototype parameter; no parameter name specified
4036// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
4037// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
4038//
4039// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
4040// and functions versus pointers to arrays and functions. In addition, the pattern handles the special meaning of
4041// parenthesis around a typedef name:
4042//
4043// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
4044// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
4045// not as redundant parentheses around the identifier."
4046//
4047// For example:
4048//
4049// typedef float T;
4050// int f( int ( T [5] ) ); // see abstract_parameter_declarator
4051// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
4052// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
4053// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
4054//
4055// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
4056// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
4057// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
4058// functions.
4059
4060abstract_parameter_declarator_opt:
4061 // empty
4062 { $$ = nullptr; }
4063 | abstract_parameter_declarator
4064 ;
4065
4066abstract_parameter_declarator:
4067 abstract_parameter_ptr
4068 | '&' MUTEX attribute_list_opt
4069 { $$ = DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
4070 OperKinds::AddressOf )->addQualifiers( $3 ); }
4071 | abstract_parameter_array attribute_list_opt
4072 { $$ = $1->addQualifiers( $2 ); }
4073 | abstract_parameter_function attribute_list_opt
4074 { $$ = $1->addQualifiers( $2 ); }
4075 ;
4076
4077abstract_parameter_ptr:
4078 ptrref_operator
4079 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4080 | ptrref_operator type_qualifier_list
4081 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4082 | ptrref_operator abstract_parameter_declarator
4083 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4084 | ptrref_operator type_qualifier_list abstract_parameter_declarator
4085 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4086 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
4087 { $$ = $2->addQualifiers( $4 ); }
4088 ;
4089
4090abstract_parameter_array:
4091 array_parameter_dimension
4092 | '(' abstract_parameter_ptr ')' array_parameter_dimension
4093 { $$ = $2->addArray( $4 ); }
4094 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
4095 { $$ = $2->addArray( $4 ); }
4096 | '(' abstract_parameter_array ')' // redundant parenthesis
4097 { $$ = $2; }
4098 ;
4099
4100abstract_parameter_function:
4101 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4102 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
4103 | '(' abstract_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4104 { $$ = $2->addParamList( $5 ); }
4105 | '(' abstract_parameter_function ')' // redundant parenthesis
4106 { $$ = $2; }
4107 ;
4108
4109array_parameter_dimension:
4110 // Only the first dimension can be empty or have qualifiers.
4111 array_parameter_1st_dimension
4112 | array_parameter_1st_dimension multi_array_dimension
4113 { $$ = $1->addArray( $2 ); }
4114 | multi_array_dimension
4115 ;
4116
4117// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
4118//
4119// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
4120// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
4121
4122array_parameter_1st_dimension:
4123 '[' ']'
4124 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
4125 // multi_array_dimension handles the '[' '*' ']' case
4126 | '[' push type_qualifier_list '*' pop ']' // remaining C99
4127 { $$ = DeclarationNode::newVarArray( $3 ); }
4128 | '[' push type_qualifier_list pop ']'
4129 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
4130 // multi_array_dimension handles the '[' assignment_expression ']' case
4131 | '[' push type_qualifier_list assignment_expression pop ']'
4132 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4133 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
4134 { $$ = DeclarationNode::newArray( $5, $4, true ); }
4135 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
4136 { $$ = DeclarationNode::newArray( $5, $3, true ); }
4137 ;
4138
4139// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
4140//
4141// struct S {
4142// int;
4143// int *;
4144// int [10];
4145// int (*)();
4146// };
4147
4148variable_abstract_declarator:
4149 variable_abstract_ptr
4150 | variable_abstract_array attribute_list_opt
4151 { $$ = $1->addQualifiers( $2 ); }
4152 | variable_abstract_function attribute_list_opt
4153 { $$ = $1->addQualifiers( $2 ); }
4154 ;
4155
4156variable_abstract_ptr:
4157 ptrref_operator
4158 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4159 | ptrref_operator type_qualifier_list
4160 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4161 | ptrref_operator variable_abstract_declarator
4162 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4163 | ptrref_operator type_qualifier_list variable_abstract_declarator
4164 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4165 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4166 { $$ = $2->addQualifiers( $4 ); }
4167 ;
4168
4169variable_abstract_array:
4170 array_dimension
4171 | '(' variable_abstract_ptr ')' array_dimension
4172 { $$ = $2->addArray( $4 ); }
4173 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4174 { $$ = $2->addArray( $4 ); }
4175 | '(' variable_abstract_array ')' // redundant parenthesis
4176 { $$ = $2; }
4177 ;
4178
4179variable_abstract_function:
4180 '(' variable_abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4181 { $$ = $2->addParamList( $5 ); }
4182 | '(' variable_abstract_function ')' // redundant parenthesis
4183 { $$ = $2; }
4184 ;
4185
4186// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4187// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4188
4189cfa_identifier_parameter_declarator_tuple: // CFA
4190 cfa_identifier_parameter_declarator_no_tuple
4191 | cfa_abstract_tuple
4192 | type_qualifier_list cfa_abstract_tuple
4193 { $$ = $2->addQualifiers( $1 ); }
4194 ;
4195
4196cfa_identifier_parameter_declarator_no_tuple: // CFA
4197 cfa_identifier_parameter_ptr
4198 | cfa_identifier_parameter_array
4199 ;
4200
4201cfa_identifier_parameter_ptr: // CFA
4202 // No SUE declaration in parameter list.
4203 ptrref_operator type_specifier_nobody
4204 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4205 | type_qualifier_list ptrref_operator type_specifier_nobody
4206 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4207 | ptrref_operator cfa_abstract_function
4208 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4209 | type_qualifier_list ptrref_operator cfa_abstract_function
4210 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4211 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4212 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4213 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4214 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4215 ;
4216
4217cfa_identifier_parameter_array: // CFA
4218 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4219 // shift/reduce conflict with new-style empty (void) function return type.
4220 '[' ']' type_specifier_nobody
4221 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4222 | cfa_array_parameter_1st_dimension type_specifier_nobody
4223 { $$ = $2->addNewArray( $1 ); }
4224 | '[' ']' multi_array_dimension type_specifier_nobody
4225 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4226 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4227 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4228 | multi_array_dimension type_specifier_nobody
4229 { $$ = $2->addNewArray( $1 ); }
4230
4231 | '[' ']' cfa_identifier_parameter_ptr
4232 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4233 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4234 { $$ = $2->addNewArray( $1 ); }
4235 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4236 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4237 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4238 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4239 | multi_array_dimension cfa_identifier_parameter_ptr
4240 { $$ = $2->addNewArray( $1 ); }
4241 ;
4242
4243cfa_array_parameter_1st_dimension:
4244 '[' push type_qualifier_list '*' pop ']' // remaining C99
4245 { $$ = DeclarationNode::newVarArray( $3 ); }
4246 | '[' push type_qualifier_list assignment_expression pop ']'
4247 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4248 | '[' push declaration_qualifier_list assignment_expression pop ']'
4249 // declaration_qualifier_list must be used because of shift/reduce conflict with
4250 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4251 // appear in this context.
4252 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4253 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4254 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4255 ;
4256
4257// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4258// identifier to which the type applies, e.g.:
4259//
4260// [int] f( int ); // abstract variable parameter; no parameter name specified
4261// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4262//
4263// These rules need LR(3):
4264//
4265// cfa_abstract_tuple identifier_or_type_name
4266// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
4267//
4268// since a function return type can be syntactically identical to a tuple type:
4269//
4270// [int, int] t;
4271// [int, int] f( int );
4272//
4273// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4274// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4275// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4276// duplicated when appearing with cfa_function_specifier.
4277
4278cfa_abstract_declarator_tuple: // CFA
4279 cfa_abstract_tuple
4280 | type_qualifier_list cfa_abstract_tuple
4281 { $$ = $2->addQualifiers( $1 ); }
4282 | cfa_abstract_declarator_no_tuple
4283 ;
4284
4285cfa_abstract_declarator_no_tuple: // CFA
4286 cfa_abstract_ptr
4287 | cfa_abstract_array
4288 ;
4289
4290cfa_abstract_ptr: // CFA
4291 ptrref_operator type_specifier
4292 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4293 | type_qualifier_list ptrref_operator type_specifier
4294 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4295 | ptrref_operator cfa_abstract_function
4296 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4297 | type_qualifier_list ptrref_operator cfa_abstract_function
4298 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4299 | ptrref_operator cfa_abstract_declarator_tuple
4300 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4301 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4302 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4303 ;
4304
4305cfa_abstract_array: // CFA
4306 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4307 // empty (void) function return type.
4308 '[' ']' type_specifier
4309 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4310 | '[' ']' multi_array_dimension type_specifier
4311 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4312 | multi_array_dimension type_specifier
4313 { $$ = $2->addNewArray( $1 ); }
4314 | '[' ']' cfa_abstract_ptr
4315 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4316 | '[' ']' multi_array_dimension cfa_abstract_ptr
4317 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4318 | multi_array_dimension cfa_abstract_ptr
4319 { $$ = $2->addNewArray( $1 ); }
4320 ;
4321
4322cfa_abstract_tuple: // CFA
4323 '[' push cfa_abstract_parameter_list pop ']'
4324 { $$ = DeclarationNode::newTuple( $3 ); }
4325 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4326 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4327 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4328 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4329 ;
4330
4331cfa_abstract_function: // CFA
4332 '[' ']' '(' cfa_parameter_list_ellipsis_opt ')'
4333 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4334 | cfa_abstract_tuple '(' push cfa_parameter_list_ellipsis_opt pop ')'
4335 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4336 | cfa_function_return '(' push cfa_parameter_list_ellipsis_opt pop ')'
4337 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4338 ;
4339
4340// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4341// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4342//
4343// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4344// the declaration specifiers in a declaration is an obsolescent feature."
4345//
4346// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4347// prototype-format parameter type declarators) is an obsolescent feature."
4348//
4349// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4350// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4351
4352// ************************ MISCELLANEOUS ********************************
4353
4354comma_opt: // redundant comma
4355 // empty
4356 | ','
4357 ;
4358
4359default_initializer_opt:
4360 // empty
4361 { $$ = nullptr; }
4362 | '=' assignment_expression
4363 { $$ = $2; }
4364 ;
4365
4366%%
4367
4368// ----end of grammar----
4369
4370// Local Variables: //
4371// mode: c++ //
4372// tab-width: 4 //
4373// compile-command: "bison -Wcounterexamples parser.yy" //
4374// End: //
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