source: src/Parser/parser.yy@ f1d2c44

Last change on this file since f1d2c44 was 2ab31fd, checked in by Peter A. Buhr <pabuhr@…>, 19 months ago

parse tuple-element declarations but unimplemented
  • Property mode set to 100644
File size: 176.9 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 : Tue Jun 11 16:56:42 2024
13// Update Count : 6638
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 "syntax error, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
226#define MISSING_LOW "syntax error, missing low value for up-to range so index is uninitialized."
227#define MISSING_HIGH "syntax error, missing high value for down-to range so index is uninitialized."
228
229static ForCtrl * makeForCtrl(
230 const CodeLocation & location,
231 DeclarationNode * init,
232 enum OperKinds compop,
233 ExpressionNode * comp,
234 ExpressionNode * inc ) {
235 // Wrap both comp/inc if they are non-null.
236 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
237 compop,
238 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
239 comp ) );
240 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
241 // choose += or -= for upto/downto
242 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
243 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
244 inc ) );
245 // The StatementNode call frees init->name, it must happen later.
246 return new ForCtrl( new StatementNode( init ), comp, inc );
247}
248
249ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
250 if ( index->initializer ) {
251 SemanticError( yylloc, "syntax error, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
252 } // if
253 if ( index->next ) {
254 SemanticError( yylloc, "syntax error, multiple loop indexes disallowed in for-loop declaration." );
255 } // if
256 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
257 return makeForCtrl( location, initDecl, compop, comp, inc );
258} // forCtrl
259
260ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
261 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
262 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
263 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicKind::SignedInt ) ) );
264 } // if
265 DeclarationNode * initDecl = distAttr(
266 DeclarationNode::newTypeof( type, true ),
267 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
268 );
269 return makeForCtrl( location, initDecl, compop, comp, inc );
270} // forCtrl
271
272ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
273 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
274 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
275 } else if ( auto commaExpr = dynamic_cast<ast::CommaExpr *>( index->expr.get() ) ) {
276 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
277 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
278 } else {
279 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
280 } // if
281 } else {
282 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
283 } // if
284} // forCtrl
285
286static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
287 SemanticError( yylloc, "syntax error, adjacent identifiers \"%s\" and \"%s\" are not meaningful in an %s.\n"
288 "Possible cause is misspelled type name or missing generic parameter.",
289 identifier1.c_str(), identifier2.c_str(), kind );
290} // IdentifierBeforeIdentifier
291
292static void IdentifierBeforeType( string & identifier, const char * kind ) {
293 SemanticError( yylloc, "syntax error, identifier \"%s\" cannot appear before a %s.\n"
294 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter.",
295 identifier.c_str(), kind );
296} // IdentifierBeforeType
297
298bool forall = false; // aggregate have one or more forall qualifiers ?
299
300// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
301#define YYLLOC_DEFAULT(Cur, Rhs, N) \
302if ( N ) { \
303 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
304 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
305 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
306 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
307 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
308} else { \
309 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
310 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
311 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
312}
313%}
314
315%define parse.error verbose
316
317// Types declaration for productions
318
319%union {
320 // A raw token can be used.
321 Token tok;
322
323 // The general node types hold some generic node or list of nodes.
324 DeclarationNode * decl;
325 InitializerNode * init;
326 ExpressionNode * expr;
327 StatementNode * stmt;
328 ClauseNode * clause;
329 TypeData * type;
330
331 // Special "nodes" containing compound information.
332 CondCtl * ifctl;
333 ForCtrl * forctl;
334 LabelNode * labels;
335
336 // Various flags and single values that become fields later.
337 ast::AggregateDecl::Aggregate aggKey;
338 ast::TypeDecl::Kind tclass;
339 OperKinds oper;
340 bool is_volatile;
341 EnumHiding enum_hiding;
342 ast::ExceptionKind except_kind;
343 // String passes ownership with it.
344 std::string * str;
345
346 // Narrower node types are used to avoid constant unwrapping.
347 ast::WaitForStmt * wfs;
348 ast::WaitUntilStmt::ClauseNode * wucn;
349 ast::GenericExpr * genexpr;
350}
351
352// ************************ TERMINAL TOKENS ********************************
353
354// keywords
355%token TYPEDEF
356%token EXTERN STATIC AUTO REGISTER
357%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
358%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
359%token NORETURN // C11
360%token CONST VOLATILE
361%token RESTRICT // C99
362%token ATOMIC // C11
363%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
364%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
365%token BOOL COMPLEX IMAGINARY // C99
366%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
367%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
368%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
369%token ZERO_T ONE_T // CFA
370%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE // GCC
371%token OFFSETOF BASETYPEOF TYPEID // CFA
372%token ENUM STRUCT UNION
373%token EXCEPTION // CFA
374%token GENERATOR COROUTINE MONITOR THREAD // CFA
375%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
376// %token RESUME // CFA
377%token LABEL // GCC
378%token SUSPEND // CFA
379%token ATTRIBUTE EXTENSION // GCC
380%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
381%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
382%token CORUN COFOR
383%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
384%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
385%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
386
387// names and constants: lexer differentiates between identifier and typedef names
388%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
389%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
390%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
391%token<tok> DIRECTIVE
392// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
393// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
394// converted into the tuple index (.)(1). e.g., 3.x
395%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
396
397// multi-character operators
398%token ARROW // ->
399%token ICR DECR // ++ --
400%token LS RS // << >>
401%token LE GE EQ NE // <= >= == !=
402%token ANDAND OROR // && ||
403%token ATTR ELLIPSIS // @@ ...
404
405%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
406%token PLUSassign MINUSassign // += -=
407%token LSassign RSassign // <<= >>=
408%token ANDassign ERassign ORassign // &= ^= |=
409
410%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
411%token ATassign // @=
412
413%type<tok> identifier identifier_at identifier_or_type_name attr_name
414%type<tok> quasi_keyword
415%type<expr> string_literal
416%type<str> string_literal_list
417
418%type<enum_hiding> hide_opt visible_hide_opt
419
420// expressions
421%type<expr> constant
422%type<expr> tuple tuple_expression_list
423%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
424%type<expr> primary_expression postfix_expression unary_expression
425%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
426%type<expr> shift_expression relational_expression equality_expression
427%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
428%type<expr> logical_AND_expression logical_OR_expression
429%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
430%type<expr> comma_expression comma_expression_opt
431%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
432%type<ifctl> conditional_declaration
433%type<forctl> for_control_expression for_control_expression_list
434%type<oper> upupeq updown updowneq downupdowneq
435%type<expr> subrange
436%type<decl> asm_name_opt
437%type<expr> asm_operands_opt asm_operands_list asm_operand
438%type<labels> label_list
439%type<expr> asm_clobbers_list_opt
440%type<is_volatile> asm_volatile_opt
441%type<expr> handler_predicate_opt
442%type<genexpr> generic_association generic_assoc_list
443
444// statements
445%type<stmt> statement labeled_statement compound_statement
446%type<stmt> statement_decl statement_decl_list statement_list_nodecl
447%type<stmt> selection_statement
448%type<clause> switch_clause_list_opt switch_clause_list
449%type<expr> case_value
450%type<clause> case_clause case_value_list case_label case_label_list
451%type<stmt> iteration_statement jump_statement
452%type<stmt> expression_statement asm_statement
453%type<stmt> with_statement
454%type<expr> with_clause_opt
455%type<stmt> corun_statement cofor_statement
456%type<stmt> exception_statement
457%type<clause> handler_clause finally_clause
458%type<except_kind> handler_key
459%type<stmt> mutex_statement
460%type<expr> when_clause when_clause_opt waitfor waituntil timeout
461%type<stmt> waitfor_statement waituntil_statement
462%type<wfs> wor_waitfor_clause
463%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
464
465// declarations
466%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
467%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
468%type<decl> abstract_parameter_declaration
469
470%type<aggKey> aggregate_key aggregate_data aggregate_control
471%type<decl> aggregate_type aggregate_type_nobody
472
473%type<decl> assertion assertion_list assertion_list_opt
474
475%type<expr> bit_subrange_size_opt bit_subrange_size
476
477%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
478%type<type> basic_type_name_type
479%type<type> vtable vtable_opt default_opt
480
481%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
482
483%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
484%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
485
486%type<decl> elaborated_type elaborated_type_nobody
487
488%type<decl> enumerator_list enum_type enum_type_nobody enumerator_type
489%type<init> enumerator_value_opt
490
491%type<decl> external_definition external_definition_list external_definition_list_opt
492
493%type<decl> exception_declaration
494
495%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declaring_list field_declarator field_abstract_list_opt field_abstract
496%type<expr> field field_name_list field_name fraction_constants_opt
497
498%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
499
500%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
501%type<decl> identifier_list
502
503%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
504%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
505%type<decl> cfa_abstract_ptr cfa_abstract_tuple
506
507%type<decl> cfa_array_parameter_1st_dimension
508
509%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
510%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
511
512%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
513%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
514
515%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_list_ellipsis_opt
516
517%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
518
519%type<decl> c_declaration static_assert
520%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
521%type<decl> KR_parameter_list KR_parameter_list_opt
522
523%type<decl> parameter_declaration parameter_list parameter_list_ellipsis_opt
524
525%type<decl> paren_identifier paren_type
526
527%type<decl> storage_class storage_class_list
528
529%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
530
531%type<tclass> type_class new_type_class
532%type<decl> type_declarator type_declarator_name type_declaring_list
533
534%type<decl> type_declaration_specifier type_type_specifier
535%type<type> type_name typegen_name
536%type<decl> typedef_name typedef_declaration typedef_expression
537
538%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
539%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
540
541%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
542
543%type<decl> type type_no_function
544%type<decl> type_parameter type_parameter_list type_initializer_opt
545
546%type<expr> type_parameters_opt type_list array_type_list // array_dimension_list
547
548%type<decl> type_qualifier forall type_qualifier_list_opt type_qualifier_list
549%type<type> type_qualifier_name
550%type<decl> type_specifier type_specifier_nobody
551
552%type<decl> variable_declarator variable_ptr variable_array variable_function
553%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
554
555%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
556
557// initializers
558%type<init> initializer initializer_list_opt initializer_opt
559
560// designators
561%type<expr> designator designator_list designation
562
563
564// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
565// .---------. matches IF '(' comma_expression ')' statement . (reduce)
566// if ( C ) S1 else S2
567// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
568// Similar issues exit with the waitfor statement.
569
570// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
571// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
572%precedence THEN // rule precedence for IF/WAITFOR statement
573%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
574%precedence WAND // token precedence for start of WAND in WAITFOR statement
575%precedence OROR // token precedence for start of WOR in WAITFOR statement
576%precedence WOR // token precedence for start of WOR in WAITFOR statement
577%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
578%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
579%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
580%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
581%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
582%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
583%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
584
585
586// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
587// forall( otype T ) struct Foo { T v; };
588// .-----. matches pointer to function returning a generic (which is impossible without a type)
589// Foo ( *fp )( int );
590// `---' matches start of TYPEGENname '('
591// must be:
592// Foo( int ) ( *fp )( int );
593// The same problem occurs here:
594// forall( otype T ) struct Foo { T v; } ( *fp )( int );
595// must be:
596// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
597
598// Order of these lines matters (low-to-high precedence).
599%precedence TYPEGENname
600%precedence '}'
601%precedence '('
602
603// %precedence RESUME
604// %precedence '{'
605// %precedence ')'
606
607%locations // support location tracking for error messages
608
609%start translation_unit // parse-tree root
610
611%%
612// ************************ Namespace Management ********************************
613
614// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
615// which are lexically identical.
616//
617// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
618// foo f; // to allow it to appear in this context
619//
620// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
621// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
622// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
623// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
624// must be distinguished by the lexical scanner.
625//
626// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
627// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
628// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
629// each context that introduces a name scope, a new level is created in the type table and that level is popped on
630// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
631// This requires distinguishing between type names that are local to the current declaration scope and those that
632// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
633//
634// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
635// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
636// around the list separator.
637//
638// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
639// push pop push pop
640
641push:
642 { typedefTable.enterScope(); }
643 ;
644
645pop:
646 { typedefTable.leaveScope(); }
647 ;
648
649// ************************ CONSTANTS ********************************
650
651constant:
652 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
653 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
654 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
655 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
656 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
657 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
658 ;
659
660quasi_keyword: // CFA
661 TIMEOUT
662 | WAND
663 | WOR
664 | CATCH
665 | RECOVER
666 | CATCHRESUME
667 | FIXUP
668 | FINALLY
669 ;
670
671identifier:
672 IDENTIFIER
673 | quasi_keyword
674 ;
675
676identifier_at:
677 identifier
678 | '@' // CFA
679 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
680 ;
681
682string_literal:
683 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
684 ;
685
686string_literal_list: // juxtaposed strings are concatenated
687 STRINGliteral { $$ = $1; } // conversion from tok to str
688 | string_literal_list STRINGliteral
689 {
690 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
691 delete $2; // allocated by lexer
692 $$ = $1; // conversion from tok to str
693 }
694 ;
695
696// ************************ EXPRESSIONS ********************************
697
698primary_expression:
699 IDENTIFIER // typedef name cannot be used as a variable name
700 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
701 | quasi_keyword
702 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
703 | TYPEDIMname // CFA, generic length argument
704 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
705 | tuple
706 | '(' comma_expression ')'
707 { $$ = $2; }
708 | '(' compound_statement ')' // GCC, lambda expression
709 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
710 | type_name '.' identifier // CFA, nested type
711 { $$ = new ExpressionNode( build_qualified_expr( yylloc, DeclarationNode::newFromTypeData( $1 ), build_varref( yylloc, $3 ) ) ); }
712 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
713 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
714 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
715 {
716 // add the missing control expression to the GenericExpr and return it
717 $5->control = maybeMoveBuild( $3 );
718 $$ = new ExpressionNode( $5 );
719 }
720 // | RESUME '(' comma_expression ')'
721 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
722 // | RESUME '(' comma_expression ')' compound_statement
723 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
724 | IDENTIFIER IDENTIFIER // invalid syntax rule
725 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "expression" ); $$ = nullptr; }
726 | IDENTIFIER type_qualifier // invalid syntax rule
727 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
728 | IDENTIFIER storage_class // invalid syntax rule
729 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
730 | IDENTIFIER basic_type_name // invalid syntax rule
731 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
732 | IDENTIFIER TYPEDEFname // invalid syntax rule
733 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
734 | IDENTIFIER TYPEGENname // invalid syntax rule
735 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
736 ;
737
738generic_assoc_list: // C11
739 generic_association
740 | generic_assoc_list ',' generic_association
741 {
742 // steal the association node from the singleton and delete the wrapper
743 assert( 1 == $3->associations.size() );
744 $1->associations.push_back( $3->associations.front() );
745 delete $3;
746 $$ = $1;
747 }
748 ;
749
750generic_association: // C11
751 type_no_function ':' assignment_expression
752 {
753 // create a GenericExpr wrapper with one association pair
754 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
755 }
756 | DEFAULT ':' assignment_expression
757 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
758 ;
759
760postfix_expression:
761 primary_expression
762 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
763 // Historic, transitional: Disallow commas in subscripts.
764 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
765 // Current: Commas in subscripts make tuples.
766 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, $3->set_last( $5 ) ) ) ) ); }
767 | postfix_expression '[' assignment_expression ']'
768 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
769 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
770 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
771 // equivalent to the old x[i,j].
772 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
773 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
774 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
775 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
776 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
777 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
778 {
779 Token fn;
780 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
781 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $1->set_last( $3 ) ) ) );
782 }
783 | postfix_expression '(' argument_expression_list_opt ')'
784 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
785 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
786 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
787 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg" ) ) ),
788 $3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) ) ) ); }
789 | postfix_expression '`' identifier // CFA, postfix call
790 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
791 | constant '`' identifier // CFA, postfix call
792 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
793 | string_literal '`' identifier // CFA, postfix call
794 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
795
796 // SKULLDUGGERY: The typedef table used for parsing does not store fields in structures. To parse a qualified
797 // name, it is assumed all name-tokens after the first are identifiers, regardless of how the lexer identifies
798 // them. For example:
799 //
800 // struct S;
801 // forall(T) struct T;
802 // union U;
803 // enum E { S, T, E };
804 // struct Z { int S, T, Z, E, U; };
805 // void fred () {
806 // Z z;
807 // z.S; // lexer returns S is TYPEDEFname
808 // z.T; // lexer returns T is TYPEGENname
809 // z.Z; // lexer returns Z is TYPEDEFname
810 // z.U; // lexer returns U is TYPEDEFname
811 // z.E; // lexer returns E is TYPEDEFname
812 // }
813 | postfix_expression '.' identifier
814 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
815 | postfix_expression '.' TYPEDEFname // CFA, SKULLDUGGERY
816 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
817 | postfix_expression '.' TYPEGENname // CFA, SKULLDUGGERY
818 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
819
820 | postfix_expression '.' INTEGERconstant // CFA, tuple index
821 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
822 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
823 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
824 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
825 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
826 | postfix_expression '.' aggregate_control
827 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
828 | postfix_expression ARROW identifier
829 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
830 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
831 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
832 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
833 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
834 | postfix_expression ICR
835 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
836 | postfix_expression DECR
837 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
838 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
839 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
840 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
841 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
842 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
843 {
844 Token fn;
845 fn.str = new string( "^?{}" ); // location undefined
846 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $2->set_last( $4 ) ) );
847 }
848 ;
849
850argument_expression_list_opt:
851 // empty
852 { $$ = nullptr; }
853 | argument_expression_list
854 ;
855
856argument_expression_list:
857 argument_expression
858 | argument_expression_list_opt ',' argument_expression
859 { $$ = $1->set_last( $3 ); }
860 ;
861
862argument_expression:
863 '@' // CFA, default parameter
864 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
865 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
866 | assignment_expression
867 ;
868
869field_name_list: // CFA, tuple field selector
870 field
871 | field_name_list ',' field { $$ = $1->set_last( $3 ); }
872 ;
873
874field: // CFA, tuple field selector
875 field_name
876 | FLOATING_DECIMALconstant field
877 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
878 | FLOATING_DECIMALconstant '[' field_name_list ']'
879 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
880 | field_name '.' field
881 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
882 | field_name '.' '[' field_name_list ']'
883 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
884 | field_name ARROW field
885 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
886 | field_name ARROW '[' field_name_list ']'
887 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
888 ;
889
890field_name:
891 INTEGERconstant fraction_constants_opt
892 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
893 | FLOATINGconstant fraction_constants_opt
894 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
895 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
896 {
897 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
898 }
899 ;
900
901fraction_constants_opt:
902 // empty
903 { $$ = nullptr; }
904 | fraction_constants_opt FLOATING_FRACTIONconstant
905 {
906 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
907 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
908 }
909 ;
910
911unary_expression:
912 postfix_expression
913 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
914 // semantics checks, e.g., ++3, 3--, *3, &&3
915 | constant
916 | string_literal
917 { $$ = $1; }
918 | EXTENSION cast_expression // GCC
919 { $$ = $2->set_extension( true ); }
920 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
921 // { * X; } // dereference X
922 // { * int X; } // CFA declaration of pointer to int
923 | ptrref_operator cast_expression // CFA
924 {
925 switch ( $1 ) {
926 case OperKinds::AddressOf:
927 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
928 break;
929 case OperKinds::PointTo:
930 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
931 break;
932 case OperKinds::And:
933 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
934 break;
935 default:
936 assert( false );
937 }
938 }
939 | unary_operator cast_expression
940 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
941 | ICR unary_expression
942 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
943 | DECR unary_expression
944 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
945 | SIZEOF unary_expression
946 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
947 | SIZEOF '(' type_no_function ')'
948 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
949 | ALIGNOF unary_expression // GCC, variable alignment
950 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
951 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
952 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
953
954 // Cannot use rule "type", which includes cfa_abstract_function, for sizeof/alignof, because of S/R problems on
955 // look ahead, so the cfa_abstract_function is factored out.
956 | SIZEOF '(' cfa_abstract_function ')'
957 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
958 | ALIGNOF '(' cfa_abstract_function ')' // GCC, type alignment
959 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
960
961 | OFFSETOF '(' type_no_function ',' identifier ')'
962 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
963 | TYPEID '(' type ')'
964 {
965 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
966 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
967 }
968 ;
969
970ptrref_operator:
971 '*' { $$ = OperKinds::PointTo; }
972 | '&' { $$ = OperKinds::AddressOf; }
973 // GCC, address of label must be handled by semantic check for ref,ref,label
974 | ANDAND { $$ = OperKinds::And; }
975 ;
976
977unary_operator:
978 '+' { $$ = OperKinds::UnPlus; }
979 | '-' { $$ = OperKinds::UnMinus; }
980 | '!' { $$ = OperKinds::Neg; }
981 | '~' { $$ = OperKinds::BitNeg; }
982 ;
983
984cast_expression:
985 unary_expression
986 | '(' type_no_function ')' cast_expression
987 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
988 | '(' aggregate_control '&' ')' cast_expression // CFA
989 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
990 | '(' aggregate_control '*' ')' cast_expression // CFA
991 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
992 | '(' VIRTUAL ')' cast_expression // CFA
993 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), nullptr ) ); }
994 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
995 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
996 | '(' RETURN type_no_function ')' cast_expression // CFA
997 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
998 | '(' COERCE type_no_function ')' cast_expression // CFA
999 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
1000 | '(' qualifier_cast_list ')' cast_expression // CFA
1001 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
1002// | '(' type_no_function ')' tuple
1003// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
1004 ;
1005
1006qualifier_cast_list:
1007 cast_modifier type_qualifier_name
1008 | cast_modifier MUTEX
1009 | qualifier_cast_list cast_modifier type_qualifier_name
1010 | qualifier_cast_list cast_modifier MUTEX
1011 ;
1012
1013cast_modifier:
1014 '-'
1015 | '+'
1016 ;
1017
1018exponential_expression:
1019 cast_expression
1020 | exponential_expression '\\' cast_expression
1021 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
1022 ;
1023
1024multiplicative_expression:
1025 exponential_expression
1026 | multiplicative_expression '*' exponential_expression
1027 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
1028 | multiplicative_expression '/' exponential_expression
1029 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
1030 | multiplicative_expression '%' exponential_expression
1031 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
1032 ;
1033
1034additive_expression:
1035 multiplicative_expression
1036 | additive_expression '+' multiplicative_expression
1037 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
1038 | additive_expression '-' multiplicative_expression
1039 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
1040 ;
1041
1042shift_expression:
1043 additive_expression
1044 | shift_expression LS additive_expression
1045 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
1046 | shift_expression RS additive_expression
1047 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
1048 ;
1049
1050relational_expression:
1051 shift_expression
1052 | relational_expression '<' shift_expression
1053 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
1054 | relational_expression '>' shift_expression
1055 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
1056 | relational_expression LE shift_expression
1057 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
1058 | relational_expression GE shift_expression
1059 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
1060 ;
1061
1062equality_expression:
1063 relational_expression
1064 | equality_expression EQ relational_expression
1065 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1066 | equality_expression NE relational_expression
1067 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1068 ;
1069
1070AND_expression:
1071 equality_expression
1072 | AND_expression '&' equality_expression
1073 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1074 ;
1075
1076exclusive_OR_expression:
1077 AND_expression
1078 | exclusive_OR_expression '^' AND_expression
1079 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1080 ;
1081
1082inclusive_OR_expression:
1083 exclusive_OR_expression
1084 | inclusive_OR_expression '|' exclusive_OR_expression
1085 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1086 ;
1087
1088logical_AND_expression:
1089 inclusive_OR_expression
1090 | logical_AND_expression ANDAND inclusive_OR_expression
1091 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1092 ;
1093
1094logical_OR_expression:
1095 logical_AND_expression
1096 | logical_OR_expression OROR logical_AND_expression
1097 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1098 ;
1099
1100conditional_expression:
1101 logical_OR_expression
1102 | logical_OR_expression '?' comma_expression ':' conditional_expression
1103 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1104 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1105 { $$ = new ExpressionNode( build_cond( yylloc, $1, nullptr, $4 ) ); }
1106 ;
1107
1108constant_expression:
1109 conditional_expression
1110 ;
1111
1112assignment_expression:
1113 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1114 conditional_expression
1115 | unary_expression assignment_operator assignment_expression
1116 {
1117// if ( $2 == OperKinds::AtAssn ) {
1118// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1119// } else {
1120 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1121// } // if
1122 }
1123 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1124 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1125 ;
1126
1127assignment_expression_opt:
1128 // empty
1129 { $$ = nullptr; }
1130 | assignment_expression
1131 ;
1132
1133assignment_operator:
1134 simple_assignment_operator
1135 | compound_assignment_operator
1136 ;
1137
1138simple_assignment_operator:
1139 '=' { $$ = OperKinds::Assign; }
1140 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1141 ;
1142
1143compound_assignment_operator:
1144 EXPassign { $$ = OperKinds::ExpAssn; }
1145 | MULTassign { $$ = OperKinds::MulAssn; }
1146 | DIVassign { $$ = OperKinds::DivAssn; }
1147 | MODassign { $$ = OperKinds::ModAssn; }
1148 | PLUSassign { $$ = OperKinds::PlusAssn; }
1149 | MINUSassign { $$ = OperKinds::MinusAssn; }
1150 | LSassign { $$ = OperKinds::LSAssn; }
1151 | RSassign { $$ = OperKinds::RSAssn; }
1152 | ANDassign { $$ = OperKinds::AndAssn; }
1153 | ERassign { $$ = OperKinds::ERAssn; }
1154 | ORassign { $$ = OperKinds::OrAssn; }
1155 ;
1156
1157tuple: // CFA, tuple
1158 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1159 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1160// '[' ']'
1161// { $$ = new ExpressionNode( build_tuple() ); }
1162// | '[' push assignment_expression pop ']'
1163// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1164 '[' ',' tuple_expression_list ']'
1165 { $$ = new ExpressionNode( build_tuple( yylloc, (new ExpressionNode( nullptr ))->set_last( $3 ) ) ); }
1166 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1167 { $$ = new ExpressionNode( build_tuple( yylloc, $3->set_last( $6 ) ) ); }
1168 ;
1169
1170tuple_expression_list:
1171 assignment_expression
1172 | '@' // CFA
1173 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1174 | tuple_expression_list ',' assignment_expression
1175 { $$ = $1->set_last( $3 ); }
1176 | tuple_expression_list ',' '@'
1177 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1178 ;
1179
1180comma_expression:
1181 assignment_expression
1182 | comma_expression ',' assignment_expression
1183 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1184 ;
1185
1186comma_expression_opt:
1187 // empty
1188 { $$ = nullptr; }
1189 | comma_expression
1190 ;
1191
1192// ************************** STATEMENTS *******************************
1193
1194statement:
1195 labeled_statement
1196 | compound_statement
1197 | expression_statement
1198 | selection_statement
1199 | iteration_statement
1200 | jump_statement
1201 | with_statement
1202 | mutex_statement
1203 | waitfor_statement
1204 | waituntil_statement
1205 | corun_statement
1206 | cofor_statement
1207 | exception_statement
1208 | enable_disable_statement
1209 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1210 | asm_statement
1211 | DIRECTIVE
1212 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1213 ;
1214
1215labeled_statement:
1216 // labels cannot be identifiers 0 or 1
1217 identifier_or_type_name ':' attribute_list_opt statement
1218 { $$ = $4->add_label( yylloc, $1, $3 ); }
1219 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1220 {
1221 SemanticError( yylloc, "syntx error, label \"%s\" must be associated with a statement, "
1222 "where a declaration, case, or default is not a statement.\n"
1223 "Move the label or terminate with a semicolon.", $1.str->c_str() );
1224 $$ = nullptr;
1225 }
1226 ;
1227
1228compound_statement:
1229 '{' '}'
1230 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1231 | '{' push
1232 local_label_declaration_opt // GCC, local labels appear at start of block
1233 statement_decl_list // C99, intermix declarations and statements
1234 pop '}'
1235 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1236 ;
1237
1238statement_decl_list: // C99
1239 statement_decl
1240 | statement_decl_list statement_decl
1241 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1242 ;
1243
1244statement_decl:
1245 declaration // CFA, new & old style declarations
1246 { $$ = new StatementNode( $1 ); }
1247 | EXTENSION declaration // GCC
1248 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1249 | function_definition
1250 { $$ = new StatementNode( $1 ); }
1251 | EXTENSION function_definition // GCC
1252 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1253 | statement
1254 ;
1255
1256statement_list_nodecl:
1257 statement
1258 | statement_list_nodecl statement
1259 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1260 | statement_list_nodecl error // invalid syntax rule
1261 { SemanticError( yylloc, "syntax error, declarations only allowed at the start of the switch body,"
1262 " i.e., after the '{'." ); $$ = nullptr; }
1263 ;
1264
1265expression_statement:
1266 comma_expression_opt ';'
1267 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1268 ;
1269
1270// "if", "switch", and "choose" require parenthesis around the conditional. See the following ambiguities without
1271// parenthesis:
1272//
1273// if x + y + z; => if ( x ) + y + z or if ( x + y ) + z
1274//
1275// switch O { }
1276//
1277// O{} => object-constructor for conditional, switch body ???
1278// O{} => O for conditional followed by switch body
1279//
1280// C++ has this problem, as it has the same constructor syntax.
1281//
1282// switch sizeof ( T ) { }
1283//
1284// sizeof ( T ) => sizeof of T for conditional followed by switch body
1285// sizeof ( T ) => sizeof of compound literal (T){ }, closing parenthesis ???
1286//
1287// Note the two grammar rules for sizeof (alignof)
1288//
1289// | SIZEOF unary_expression
1290// | SIZEOF '(' type_no_function ')'
1291//
1292// where the first DOES NOT require parenthesis! And C++ inherits this problem from C.
1293
1294selection_statement:
1295 IF '(' conditional_declaration ')' statement %prec THEN
1296 // explicitly deal with the shift/reduce conflict on if/else
1297 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1298 | IF '(' conditional_declaration ')' statement ELSE statement
1299 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1300 | SWITCH '(' comma_expression ')' case_clause
1301 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1302 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1303 {
1304 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1305 // The semantics of the declaration list is changed to include associated initialization, which is performed
1306 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1307 // statement around the switch. Statements after the initial declaration list can never be executed, and
1308 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1309 // statement.
1310 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1311 }
1312 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1313 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1314 | CHOOSE '(' comma_expression ')' case_clause // CFA
1315 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1316 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1317 {
1318 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1319 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1320 }
1321 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1322 { SemanticError( yylloc, "syntax error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1323 ;
1324
1325conditional_declaration:
1326 comma_expression
1327 { $$ = new CondCtl( nullptr, $1 ); }
1328 | c_declaration // no semi-colon
1329 { $$ = new CondCtl( $1, nullptr ); }
1330 | cfa_declaration // no semi-colon
1331 { $$ = new CondCtl( $1, nullptr ); }
1332 | declaration comma_expression // semi-colon separated
1333 { $$ = new CondCtl( $1, $2 ); }
1334 ;
1335
1336// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1337// clause allows a list of values and subranges.
1338
1339case_value: // CFA
1340 constant_expression { $$ = $1; }
1341 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1342 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1343 | subrange // CFA, subrange
1344 ;
1345
1346case_value_list: // CFA
1347 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1348 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1349 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1350 ;
1351
1352case_label: // CFA
1353 CASE error // invalid syntax rule
1354 { SemanticError( yylloc, "syntax error, case list missing after case." ); $$ = nullptr; }
1355 | CASE case_value_list ':' { $$ = $2; }
1356 | CASE case_value_list error // invalid syntax rule
1357 { SemanticError( yylloc, "syntax error, colon missing after case list." ); $$ = nullptr; }
1358 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1359 // A semantic check is required to ensure only one default clause per switch/choose statement.
1360 | DEFAULT error // invalid syntax rule
1361 { SemanticError( yylloc, "syntax error, colon missing after default." ); $$ = nullptr; }
1362 ;
1363
1364case_label_list: // CFA
1365 case_label
1366 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1367 ;
1368
1369case_clause: // CFA
1370 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1371 ;
1372
1373switch_clause_list_opt: // CFA
1374 // empty
1375 { $$ = nullptr; }
1376 | switch_clause_list
1377 ;
1378
1379switch_clause_list: // CFA
1380 case_label_list statement_list_nodecl
1381 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1382 | switch_clause_list case_label_list statement_list_nodecl
1383 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1384 ;
1385
1386iteration_statement:
1387 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1388 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1389 | WHILE '(' ')' statement ELSE statement // CFA
1390 {
1391 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1392 SemanticWarning( yylloc, Warning::SuperfluousElse );
1393 }
1394 | WHILE '(' conditional_declaration ')' statement %prec THEN
1395 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1396 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1397 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1398 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1399 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1400 | DO statement WHILE '(' ')' ELSE statement // CFA
1401 {
1402 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1403 SemanticWarning( yylloc, Warning::SuperfluousElse );
1404 }
1405 | DO statement WHILE '(' comma_expression ')' ';'
1406 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1407 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1408 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1409 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1410 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1411 | FOR '(' ')' statement ELSE statement // CFA
1412 {
1413 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1414 SemanticWarning( yylloc, Warning::SuperfluousElse );
1415 }
1416 | FOR '(' for_control_expression_list ')' statement %prec THEN
1417 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1418 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1419 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1420 ;
1421
1422for_control_expression_list:
1423 for_control_expression
1424 | for_control_expression_list ':' for_control_expression
1425 // ForCtrl + ForCtrl:
1426 // init + init => multiple declaration statements that are hoisted
1427 // condition + condition => (expression) && (expression)
1428 // change + change => (expression), (expression)
1429 {
1430 $1->init->set_last( $3->init );
1431 if ( $1->condition ) {
1432 if ( $3->condition ) {
1433 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1434 } // if
1435 } else $1->condition = $3->condition;
1436 if ( $1->change ) {
1437 if ( $3->change ) {
1438 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1439 } // if
1440 } else $1->change = $3->change;
1441 $$ = $1;
1442 }
1443 ;
1444
1445for_control_expression:
1446 ';' comma_expression_opt ';' comma_expression_opt
1447 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1448 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1449 {
1450 StatementNode * init = $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr;
1451 $$ = new ForCtrl( init, $3, $5 );
1452 }
1453 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1454 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1455
1456 | '@' ';' comma_expression // CFA, empty loop-index
1457 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1458 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1459 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1460
1461 | comma_expression // CFA, anonymous loop-index
1462 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1463 | downupdowneq comma_expression // CFA, anonymous loop-index
1464 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1465
1466 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1467 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1468 | '@' updowneq comma_expression // CFA, anonymous loop-index
1469 {
1470 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1471 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1472 }
1473 | comma_expression updowneq '@' // CFA, anonymous loop-index
1474 {
1475 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1476 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1477 }
1478 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1479 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1480 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1481 {
1482 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1483 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1484 }
1485 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1486 {
1487 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1488 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1489 }
1490 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1491 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1492 | '@' updowneq '@' // CFA, invalid syntax rule
1493 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1494 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1495 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1496 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1497 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1498 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1499 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1500
1501 | comma_expression ';' comma_expression // CFA
1502 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1503 | comma_expression ';' downupdowneq comma_expression // CFA
1504 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1505
1506 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1507 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1508 | comma_expression ';' '@' updowneq comma_expression // CFA
1509 {
1510 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1511 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1512 }
1513 | comma_expression ';' comma_expression updowneq '@' // CFA
1514 {
1515 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1516 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1517 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1518 }
1519 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1520 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1521
1522 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1523 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1524 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1525 {
1526 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1527 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1528 }
1529 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1530 {
1531 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1532 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1533 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1534 }
1535 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1536 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1537 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1538 {
1539 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1540 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1541 }
1542 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1543 {
1544 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1545 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1546 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1547 }
1548 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1549 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1550
1551 | declaration comma_expression // CFA
1552 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1553 | declaration downupdowneq comma_expression // CFA
1554 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1555
1556 | declaration comma_expression updowneq comma_expression // CFA
1557 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1558 | declaration '@' updowneq comma_expression // CFA
1559 {
1560 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1561 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1562 }
1563 | declaration comma_expression updowneq '@' // CFA
1564 {
1565 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1566 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1567 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1568 }
1569
1570 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1571 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1572 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1573 {
1574 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1575 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1576 }
1577 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1578 {
1579 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1580 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1581 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1582 }
1583 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1584 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1585 | declaration '@' updowneq 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, nullptr );
1589 }
1590 | declaration comma_expression updowneq '@' '~' '@' // CFA
1591 {
1592 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1593 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1594 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1595 }
1596 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1597 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1598
1599 | comma_expression ';' enum_key // CFA, enum type
1600 {
1601 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1602 //$$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1603 }
1604 | comma_expression ';' downupdowneq enum_key // CFA, enum type, reverse direction
1605 {
1606 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) {
1607 SemanticError( yylloc, "syntax error, all enumeration ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr;
1608 }
1609 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1610 }
1611 ;
1612
1613enum_key:
1614 TYPEDEFname
1615 | ENUM TYPEDEFname
1616 ;
1617
1618downupdowneq:
1619 ErangeDown
1620 { $$ = OperKinds::GThan; }
1621 | ErangeUpEq
1622 { $$ = OperKinds::LEThan; }
1623 | ErangeDownEq
1624 { $$ = OperKinds::GEThan; }
1625 ;
1626
1627updown:
1628 '~'
1629 { $$ = OperKinds::LThan; }
1630 | ErangeDown
1631 { $$ = OperKinds::GThan; }
1632 ;
1633
1634updowneq:
1635 updown
1636 | ErangeUpEq
1637 { $$ = OperKinds::LEThan; }
1638 | ErangeDownEq
1639 { $$ = OperKinds::GEThan; }
1640 ;
1641
1642jump_statement:
1643 GOTO identifier_or_type_name ';'
1644 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1645 | GOTO '*' comma_expression ';' // GCC, computed goto
1646 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1647 // whereas normal operator precedence yields goto (*i)+3;
1648 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1649 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1650 | fall_through_name ';' // CFA
1651 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1652 | fall_through_name identifier_or_type_name ';' // CFA
1653 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1654 | fall_through_name DEFAULT ';' // CFA
1655 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1656 | CONTINUE ';'
1657 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1658 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1659 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1660 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1661 // the target of the transfer appears only at the start of an iteration statement.
1662 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1663 | BREAK ';'
1664 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1665 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1666 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1667 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1668 // the target of the transfer appears only at the start of an iteration statement.
1669 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1670 | RETURN comma_expression_opt ';'
1671 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1672 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1673 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1674 | SUSPEND ';'
1675 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1676 | SUSPEND compound_statement
1677 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1678 | SUSPEND COROUTINE ';'
1679 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1680 | SUSPEND COROUTINE compound_statement
1681 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1682 | SUSPEND GENERATOR ';'
1683 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1684 | SUSPEND GENERATOR compound_statement
1685 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1686 | THROW assignment_expression_opt ';' // handles rethrow
1687 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1688 | THROWRESUME assignment_expression_opt ';' // handles reresume
1689 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1690 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1691 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1692 ;
1693
1694fall_through_name: // CFA
1695 FALLTHRU
1696 | FALLTHROUGH
1697 ;
1698
1699with_statement:
1700 WITH '(' type_list ')' statement // support scoped enumeration
1701 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1702 ;
1703
1704// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1705mutex_statement:
1706 MUTEX '(' argument_expression_list_opt ')' statement
1707 {
1708 if ( ! $3 ) { SemanticError( yylloc, "syntax error, mutex argument list cannot be empty." ); $$ = nullptr; }
1709 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1710 }
1711 ;
1712
1713when_clause:
1714 WHEN '(' comma_expression ')' { $$ = $3; }
1715 ;
1716
1717when_clause_opt:
1718 // empty
1719 { $$ = nullptr; }
1720 | when_clause
1721 ;
1722
1723cast_expression_list:
1724 cast_expression
1725 | cast_expression_list ',' cast_expression
1726 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1727 ;
1728
1729timeout:
1730 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1731 ;
1732
1733wor:
1734 OROR
1735 | WOR
1736
1737waitfor:
1738 WAITFOR '(' cast_expression ')'
1739 { $$ = $3; }
1740 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1741 { $$ = $3->set_last( $5 ); }
1742 ;
1743
1744wor_waitfor_clause:
1745 when_clause_opt waitfor statement %prec THEN
1746 // Called first: create header for WaitForStmt.
1747 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1748 | wor_waitfor_clause wor when_clause_opt waitfor statement
1749 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1750 | wor_waitfor_clause wor when_clause_opt ELSE statement
1751 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1752 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1753 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1754 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1755 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1756 { SemanticError( yylloc, "syntax error, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1757 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1758 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1759 ;
1760
1761waitfor_statement:
1762 wor_waitfor_clause %prec THEN
1763 { $$ = new StatementNode( $1 ); }
1764 ;
1765
1766wand:
1767 ANDAND
1768 | WAND
1769 ;
1770
1771waituntil:
1772 WAITUNTIL '(' comma_expression ')'
1773 { $$ = $3; }
1774 ;
1775
1776waituntil_clause:
1777 when_clause_opt waituntil statement
1778 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1779 | '(' wor_waituntil_clause ')'
1780 { $$ = $2; }
1781 ;
1782
1783wand_waituntil_clause:
1784 waituntil_clause %prec THEN
1785 { $$ = $1; }
1786 | waituntil_clause wand wand_waituntil_clause
1787 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1788 ;
1789
1790wor_waituntil_clause:
1791 wand_waituntil_clause
1792 { $$ = $1; }
1793 | wor_waituntil_clause wor wand_waituntil_clause
1794 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1795 | wor_waituntil_clause wor when_clause_opt ELSE statement
1796 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1797 ;
1798
1799waituntil_statement:
1800 wor_waituntil_clause %prec THEN
1801 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1802 ;
1803
1804corun_statement:
1805 CORUN statement
1806 { $$ = new StatementNode( build_corun( yylloc, $2 ) ); }
1807 ;
1808
1809cofor_statement:
1810 COFOR '(' for_control_expression_list ')' statement
1811 { $$ = new StatementNode( build_cofor( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1812 ;
1813
1814exception_statement:
1815 TRY compound_statement handler_clause %prec THEN
1816 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1817 | TRY compound_statement finally_clause
1818 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1819 | TRY compound_statement handler_clause finally_clause
1820 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1821 ;
1822
1823handler_clause:
1824 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1825 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1826 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1827 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1828 ;
1829
1830handler_predicate_opt:
1831 // empty
1832 { $$ = nullptr; }
1833 | ';' conditional_expression { $$ = $2; }
1834 ;
1835
1836handler_key:
1837 CATCH { $$ = ast::Terminate; }
1838 | RECOVER { $$ = ast::Terminate; }
1839 | CATCHRESUME { $$ = ast::Resume; }
1840 | FIXUP { $$ = ast::Resume; }
1841 ;
1842
1843finally_clause:
1844 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1845 ;
1846
1847exception_declaration:
1848 // No SUE declaration in parameter list.
1849 type_specifier_nobody
1850 | type_specifier_nobody declarator
1851 { $$ = $2->addType( $1 ); }
1852 | type_specifier_nobody variable_abstract_declarator
1853 { $$ = $2->addType( $1 ); }
1854 | cfa_abstract_declarator_tuple identifier // CFA
1855 { $$ = $1->addName( $2 ); }
1856 | cfa_abstract_declarator_tuple // CFA
1857 ;
1858
1859enable_disable_statement:
1860 enable_disable_key identifier_list compound_statement
1861 ;
1862
1863enable_disable_key:
1864 ENABLE
1865 | DISABLE
1866 ;
1867
1868asm_statement:
1869 ASM asm_volatile_opt '(' string_literal ')' ';'
1870 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1871 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1872 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1873 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1874 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1875 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1876 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1877 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1878 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1879 ;
1880
1881asm_volatile_opt: // GCC
1882 // empty
1883 { $$ = false; }
1884 | VOLATILE
1885 { $$ = true; }
1886 ;
1887
1888asm_operands_opt: // GCC
1889 // empty
1890 { $$ = nullptr; } // use default argument
1891 | asm_operands_list
1892 ;
1893
1894asm_operands_list: // GCC
1895 asm_operand
1896 | asm_operands_list ',' asm_operand
1897 { $$ = $1->set_last( $3 ); }
1898 ;
1899
1900asm_operand: // GCC
1901 string_literal '(' constant_expression ')'
1902 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1903 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1904 {
1905 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1906 delete $2.str;
1907 }
1908 ;
1909
1910asm_clobbers_list_opt: // GCC
1911 // empty
1912 { $$ = nullptr; } // use default argument
1913 | string_literal
1914 { $$ = $1; }
1915 | asm_clobbers_list_opt ',' string_literal
1916 { $$ = $1->set_last( $3 ); }
1917 ;
1918
1919label_list:
1920 identifier
1921 {
1922 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1923 delete $1; // allocated by lexer
1924 }
1925 | label_list ',' identifier
1926 {
1927 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1928 delete $3; // allocated by lexer
1929 }
1930 ;
1931
1932// ****************************** DECLARATIONS *********************************
1933
1934declaration_list_opt: // used at beginning of switch statement
1935 // empty
1936 { $$ = nullptr; }
1937 | declaration_list
1938 ;
1939
1940declaration_list:
1941 declaration
1942 | declaration_list declaration
1943 { $$ = $1->set_last( $2 ); }
1944 ;
1945
1946KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1947 // empty
1948 { $$ = nullptr; }
1949 | KR_parameter_list
1950 ;
1951
1952KR_parameter_list:
1953 c_declaration ';'
1954 { $$ = $1; }
1955 | KR_parameter_list c_declaration ';'
1956 { $$ = $1->set_last( $2 ); }
1957 ;
1958
1959local_label_declaration_opt: // GCC, local label
1960 // empty
1961 | local_label_declaration_list
1962 ;
1963
1964local_label_declaration_list: // GCC, local label
1965 LABEL local_label_list ';'
1966 | local_label_declaration_list LABEL local_label_list ';'
1967 ;
1968
1969local_label_list: // GCC, local label
1970 identifier_or_type_name
1971 | local_label_list ',' identifier_or_type_name
1972 ;
1973
1974declaration: // old & new style declarations
1975 c_declaration ';'
1976 | cfa_declaration ';' // CFA
1977 | static_assert // C11
1978 ;
1979
1980static_assert:
1981 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1982 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
1983 | STATICASSERT '(' constant_expression ')' ';' // CFA
1984 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
1985
1986// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1987// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1988// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1989// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1990// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1991// block, but cannot be mixed within a specific declaration.
1992//
1993// CFA C
1994// [10] int x; int x[10]; // array of 10 integers
1995// [10] * char y; char *y[10]; // array of 10 pointers to char
1996
1997cfa_declaration: // CFA
1998 cfa_variable_declaration
1999 | cfa_typedef_declaration
2000 | cfa_function_declaration
2001 | type_declaring_list
2002 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
2003 | trait_specifier
2004 ;
2005
2006cfa_variable_declaration: // CFA
2007 cfa_variable_specifier initializer_opt
2008 { $$ = $1->addInitializer( $2 ); }
2009 | declaration_qualifier_list cfa_variable_specifier initializer_opt
2010 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
2011 // them as a type_qualifier cannot appear in that context.
2012 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
2013 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
2014 { $$ = $1->set_last( $1->cloneType( $5 )->addInitializer( $6 ) ); }
2015 ;
2016
2017cfa_variable_specifier: // CFA
2018 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2019 // storage-class
2020 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
2021 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2022 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
2023 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2024 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
2025 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
2026
2027 // [ int s, int t ]; // declare s and t
2028 // [ int, int ] f();
2029 // [] g( int );
2030 // [ int x, int y ] = f(); // declare x and y, initialize each from f
2031 // g( x + y );
2032 | cfa_function_return asm_name_opt
2033 { SemanticError( yylloc, "tuple-element declarations is currently unimplemented." ); $$ = nullptr; }
2034 | type_qualifier_list cfa_function_return asm_name_opt
2035 { SemanticError( yylloc, "tuple variable declaration is currently unimplemented." ); $$ = nullptr; }
2036 ;
2037
2038cfa_function_declaration: // CFA
2039 cfa_function_specifier
2040 | type_qualifier_list cfa_function_specifier
2041 { $$ = $2->addQualifiers( $1 ); }
2042 | declaration_qualifier_list cfa_function_specifier
2043 { $$ = $2->addQualifiers( $1 ); }
2044 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
2045 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
2046 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')'
2047 {
2048 // Append the return type at the start (left-hand-side) to each identifier in the list.
2049 DeclarationNode * ret = new DeclarationNode;
2050 ret->type = maybeCopy( $1->type->base );
2051 $$ = $1->set_last( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
2052 }
2053 ;
2054
2055cfa_function_specifier: // CFA
2056 '[' ']' identifier '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2057 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2058 | '[' ']' TYPEDEFname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2059 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2060 // | '[' ']' TYPEGENname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2061 // { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2062
2063 // identifier_or_type_name must be broken apart because of the sequence:
2064 //
2065 // '[' ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
2066 // '[' ']' type_specifier
2067 //
2068 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
2069 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
2070 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2071 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
2072 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2073 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2074 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2075 ;
2076
2077cfa_function_return: // CFA
2078 '[' push cfa_parameter_list pop ']'
2079 { $$ = DeclarationNode::newTuple( $3 ); }
2080 | '[' push cfa_parameter_list ',' cfa_abstract_parameter_list pop ']'
2081 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
2082 { $$ = DeclarationNode::newTuple( $3->set_last( $5 ) ); }
2083 ;
2084
2085cfa_typedef_declaration: // CFA
2086 TYPEDEF cfa_variable_specifier
2087 {
2088 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
2089 $$ = $2->addTypedef();
2090 }
2091 | TYPEDEF cfa_function_specifier
2092 {
2093 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2094 $$ = $2->addTypedef();
2095 }
2096 | cfa_typedef_declaration ',' identifier
2097 {
2098 typedefTable.addToEnclosingScope( *$3, TYPEDEFname, "cfa_typedef_declaration 3" );
2099 $$ = $1->set_last( $1->cloneType( $3 ) );
2100 }
2101 ;
2102
2103// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2104// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2105
2106typedef_declaration:
2107 TYPEDEF type_specifier declarator
2108 {
2109 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2110 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2111 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2112 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2113 }
2114 | typedef_declaration ',' declarator
2115 {
2116 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2117 $$ = $1->set_last( $1->cloneBaseType( $3 )->addTypedef() );
2118 }
2119 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2120 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2121 | type_specifier TYPEDEF declarator
2122 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2123 | type_specifier TYPEDEF type_qualifier_list declarator
2124 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2125 ;
2126
2127typedef_expression:
2128 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2129 TYPEDEF identifier '=' assignment_expression
2130 {
2131 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2132 }
2133 | typedef_expression ',' identifier '=' assignment_expression
2134 {
2135 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2136 }
2137 ;
2138
2139c_declaration:
2140 declaration_specifier declaring_list
2141 { $$ = distAttr( $1, $2 ); }
2142 | typedef_declaration
2143 | typedef_expression // deprecated GCC, naming expression type
2144 | sue_declaration_specifier
2145 {
2146 assert( $1->type );
2147 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2148 SemanticError( yylloc, "syntax error, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2149 }
2150 // enums are never empty declarations because there must have at least one enumeration.
2151 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2152 SemanticError( yylloc, "syntax error, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2153 }
2154 }
2155 ;
2156
2157declaring_list:
2158 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2159 // storage-class
2160 variable_declarator asm_name_opt initializer_opt
2161 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2162 | variable_type_redeclarator asm_name_opt initializer_opt
2163 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2164
2165 | general_function_declarator asm_name_opt
2166 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2167 | general_function_declarator asm_name_opt '=' VOID
2168 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2169
2170 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2171 { $$ = $1->set_last( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2172 ;
2173
2174general_function_declarator:
2175 function_type_redeclarator
2176 | function_declarator
2177 ;
2178
2179declaration_specifier: // type specifier + storage class
2180 basic_declaration_specifier
2181 | type_declaration_specifier
2182 | sue_declaration_specifier
2183 | sue_declaration_specifier invalid_types // invalid syntax rule
2184 {
2185 SemanticError( yylloc, "syntax error, expecting ';' at end of \"%s\" declaration.",
2186 ast::AggregateDecl::aggrString( $1->type->aggregate.kind ) );
2187 $$ = nullptr;
2188 }
2189 ;
2190
2191invalid_types:
2192 aggregate_key
2193 | basic_type_name
2194 | indirect_type
2195 ;
2196
2197declaration_specifier_nobody: // type specifier + storage class - {...}
2198 // Preclude SUE declarations in restricted scopes:
2199 //
2200 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2201 //
2202 // because it is impossible to call f due to name equivalence.
2203 basic_declaration_specifier
2204 | sue_declaration_specifier_nobody
2205 | type_declaration_specifier
2206 ;
2207
2208type_specifier: // type specifier
2209 basic_type_specifier
2210 | sue_type_specifier
2211 | type_type_specifier
2212 ;
2213
2214type_specifier_nobody: // type specifier - {...}
2215 // Preclude SUE declarations in restricted scopes:
2216 //
2217 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2218 //
2219 // because it is impossible to call f due to name equivalence.
2220 basic_type_specifier
2221 | sue_type_specifier_nobody
2222 | type_type_specifier
2223 ;
2224
2225type_qualifier_list_opt: // GCC, used in asm_statement
2226 // empty
2227 { $$ = nullptr; }
2228 | type_qualifier_list
2229 ;
2230
2231type_qualifier_list:
2232 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2233 //
2234 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2235 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2236 // appeared only once.
2237 type_qualifier
2238 | type_qualifier_list type_qualifier
2239 { $$ = $1->addQualifiers( $2 ); }
2240 ;
2241
2242type_qualifier:
2243 type_qualifier_name
2244 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2245 | attribute // trick handles most attribute locations
2246 ;
2247
2248type_qualifier_name:
2249 CONST
2250 { $$ = build_type_qualifier( ast::CV::Const ); }
2251 | RESTRICT
2252 { $$ = build_type_qualifier( ast::CV::Restrict ); }
2253 | VOLATILE
2254 { $$ = build_type_qualifier( ast::CV::Volatile ); }
2255 | ATOMIC
2256 { $$ = build_type_qualifier( ast::CV::Atomic ); }
2257
2258 // forall is a CV qualifier because it can appear in places where SC qualifiers are disallowed.
2259 //
2260 // void foo( forall( T ) T (*)( T ) ); // forward declaration
2261 // void bar( static int ); // static disallowed (gcc/CFA)
2262 | forall
2263 { $$ = build_forall( $1 ); }
2264 ;
2265
2266forall:
2267 FORALL '(' type_parameter_list ')' // CFA
2268 { $$ = $3; }
2269 ;
2270
2271declaration_qualifier_list:
2272 storage_class_list
2273 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2274 { $$ = $1->addQualifiers( $2 ); }
2275 | declaration_qualifier_list type_qualifier_list storage_class_list
2276 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2277 ;
2278
2279storage_class_list:
2280 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2281 // only one of each is specified, except for inline, which can appear with the others.
2282 //
2283 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2284 // specifiers in a declaration.
2285 storage_class
2286 | storage_class_list storage_class
2287 { $$ = $1->addQualifiers( $2 ); }
2288 ;
2289
2290storage_class:
2291 EXTERN
2292 { $$ = DeclarationNode::newStorageClass( ast::Storage::Extern ); }
2293 | STATIC
2294 { $$ = DeclarationNode::newStorageClass( ast::Storage::Static ); }
2295 | AUTO
2296 { $$ = DeclarationNode::newStorageClass( ast::Storage::Auto ); }
2297 | REGISTER
2298 { $$ = DeclarationNode::newStorageClass( ast::Storage::Register ); }
2299 | THREADLOCALGCC // GCC
2300 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalGcc ); }
2301 | THREADLOCALC11 // C11
2302 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalC11 ); }
2303 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2304 | INLINE // C99
2305 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Inline ); }
2306 | FORTRAN // C99
2307 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Fortran ); }
2308 | NORETURN // C11
2309 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Noreturn ); }
2310 ;
2311
2312basic_type_name:
2313 basic_type_name_type
2314 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2315 ;
2316
2317// Just an intermediate value for conversion.
2318basic_type_name_type:
2319 VOID
2320 { $$ = build_basic_type( TypeData::Void ); }
2321 | BOOL // C99
2322 { $$ = build_basic_type( TypeData::Bool ); }
2323 | CHAR
2324 { $$ = build_basic_type( TypeData::Char ); }
2325 | INT
2326 { $$ = build_basic_type( TypeData::Int ); }
2327 | INT128
2328 { $$ = build_basic_type( TypeData::Int128 ); }
2329 | UINT128
2330 { $$ = addType( build_basic_type( TypeData::Int128 ), build_signedness( TypeData::Unsigned ) ); }
2331 | FLOAT
2332 { $$ = build_basic_type( TypeData::Float ); }
2333 | DOUBLE
2334 { $$ = build_basic_type( TypeData::Double ); }
2335 | uuFLOAT80
2336 { $$ = build_basic_type( TypeData::uuFloat80 ); }
2337 | uuFLOAT128
2338 { $$ = build_basic_type( TypeData::uuFloat128 ); }
2339 | uFLOAT16
2340 { $$ = build_basic_type( TypeData::uFloat16 ); }
2341 | uFLOAT32
2342 { $$ = build_basic_type( TypeData::uFloat32 ); }
2343 | uFLOAT32X
2344 { $$ = build_basic_type( TypeData::uFloat32x ); }
2345 | uFLOAT64
2346 { $$ = build_basic_type( TypeData::uFloat64 ); }
2347 | uFLOAT64X
2348 { $$ = build_basic_type( TypeData::uFloat64x ); }
2349 | uFLOAT128
2350 { $$ = build_basic_type( TypeData::uFloat128 ); }
2351 | DECIMAL32
2352 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2353 | DECIMAL64
2354 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2355 | DECIMAL128
2356 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2357 | COMPLEX // C99
2358 { $$ = build_complex_type( TypeData::Complex ); }
2359 | IMAGINARY // C99
2360 { $$ = build_complex_type( TypeData::Imaginary ); }
2361 | SIGNED
2362 { $$ = build_signedness( TypeData::Signed ); }
2363 | UNSIGNED
2364 { $$ = build_signedness( TypeData::Unsigned ); }
2365 | SHORT
2366 { $$ = build_length( TypeData::Short ); }
2367 | LONG
2368 { $$ = build_length( TypeData::Long ); }
2369 | VA_LIST // GCC, __builtin_va_list
2370 { $$ = build_builtin_type( TypeData::Valist ); }
2371 | AUTO_TYPE
2372 { $$ = build_builtin_type( TypeData::AutoType ); }
2373 | vtable
2374 ;
2375
2376vtable_opt:
2377 // empty
2378 { $$ = nullptr; }
2379 | vtable
2380 ;
2381
2382vtable:
2383 VTABLE '(' type_name ')' default_opt
2384 { $$ = build_vtable_type( $3 ); }
2385 ;
2386
2387default_opt:
2388 // empty
2389 { $$ = nullptr; }
2390 | DEFAULT
2391 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2392 ;
2393
2394basic_declaration_specifier:
2395 // A semantic check is necessary for conflicting storage classes.
2396 basic_type_specifier
2397 | declaration_qualifier_list basic_type_specifier
2398 { $$ = $2->addQualifiers( $1 ); }
2399 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2400 { $$ = $1->addQualifiers( $2 ); }
2401 | basic_declaration_specifier storage_class type_qualifier_list
2402 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2403 | basic_declaration_specifier storage_class basic_type_specifier
2404 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2405 ;
2406
2407basic_type_specifier:
2408 direct_type
2409 // Cannot have type modifiers, e.g., short, long, etc.
2410 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2411 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2412 ;
2413
2414direct_type:
2415 basic_type_name
2416 | type_qualifier_list basic_type_name
2417 { $$ = $2->addQualifiers( $1 ); }
2418 | direct_type type_qualifier
2419 { $$ = $1->addQualifiers( $2 ); }
2420 | direct_type basic_type_name
2421 { $$ = $1->addType( $2 ); }
2422 ;
2423
2424indirect_type:
2425 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2426 { $$ = $3; }
2427 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2428 { $$ = DeclarationNode::newTypeof( $3 ); }
2429 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2430 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2431 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2432 { $$ = DeclarationNode::newTypeof( $3, true ); }
2433 | ZERO_T // CFA
2434 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::Zero ) ); }
2435 | ONE_T // CFA
2436 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::One ) ); }
2437 ;
2438
2439sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2440 sue_type_specifier
2441 | declaration_qualifier_list sue_type_specifier
2442 { $$ = $2->addQualifiers( $1 ); }
2443 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2444 { $$ = $1->addQualifiers( $2 ); }
2445 | sue_declaration_specifier storage_class type_qualifier_list
2446 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2447 ;
2448
2449sue_type_specifier: // struct, union, enum + type specifier
2450 elaborated_type
2451 | type_qualifier_list
2452 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2453 elaborated_type
2454 { $$ = $3->addQualifiers( $1 ); }
2455 | sue_type_specifier type_qualifier
2456 {
2457 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2458 $$ = $1->addQualifiers( $2 );
2459 }
2460 ;
2461
2462sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2463 sue_type_specifier_nobody
2464 | declaration_qualifier_list sue_type_specifier_nobody
2465 { $$ = $2->addQualifiers( $1 ); }
2466 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2467 { $$ = $1->addQualifiers( $2 ); }
2468 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2469 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2470 ;
2471
2472sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2473 elaborated_type_nobody
2474 | type_qualifier_list elaborated_type_nobody
2475 { $$ = $2->addQualifiers( $1 ); }
2476 | sue_type_specifier_nobody type_qualifier
2477 { $$ = $1->addQualifiers( $2 ); }
2478 ;
2479
2480type_declaration_specifier:
2481 type_type_specifier
2482 | declaration_qualifier_list type_type_specifier
2483 { $$ = $2->addQualifiers( $1 ); }
2484 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2485 { $$ = $1->addQualifiers( $2 ); }
2486 | type_declaration_specifier storage_class type_qualifier_list
2487 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2488 ;
2489
2490type_type_specifier: // typedef types
2491 type_name
2492 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2493 | type_qualifier_list type_name
2494 { $$ = DeclarationNode::newFromTypeData( $2 )->addQualifiers( $1 ); }
2495 | type_type_specifier type_qualifier
2496 { $$ = $1->addQualifiers( $2 ); }
2497 ;
2498
2499type_name:
2500 TYPEDEFname
2501 { $$ = build_typedef( $1 ); }
2502 | '.' TYPEDEFname
2503 { $$ = build_qualified_type( build_global_scope(), build_typedef( $2 ) ); }
2504 | type_name '.' TYPEDEFname
2505 { $$ = build_qualified_type( $1, build_typedef( $3 ) ); }
2506 | typegen_name
2507 | '.' typegen_name
2508 { $$ = build_qualified_type( build_global_scope(), $2 ); }
2509 | type_name '.' typegen_name
2510 { $$ = build_qualified_type( $1, $3 ); }
2511 ;
2512
2513typegen_name: // CFA
2514 TYPEGENname
2515 { $$ = build_type_gen( $1, nullptr ); }
2516 | TYPEGENname '(' ')'
2517 { $$ = build_type_gen( $1, nullptr ); }
2518 | TYPEGENname '(' type_list ')'
2519 { $$ = build_type_gen( $1, $3 ); }
2520 ;
2521
2522elaborated_type: // struct, union, enum
2523 aggregate_type
2524 | enum_type
2525 ;
2526
2527elaborated_type_nobody: // struct, union, enum - {...}
2528 aggregate_type_nobody
2529 | enum_type_nobody
2530 ;
2531
2532// ************************** AGGREGATE *******************************
2533
2534aggregate_type: // struct, union
2535 aggregate_key attribute_list_opt
2536 { forall = false; } // reset
2537 '{' field_declaration_list_opt '}' type_parameters_opt
2538 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2539 | aggregate_key attribute_list_opt identifier
2540 {
2541 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2542 forall = false; // reset
2543 }
2544 '{' field_declaration_list_opt '}' type_parameters_opt
2545 {
2546 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2547 }
2548 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2549 {
2550 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2551 forall = false; // reset
2552 }
2553 '{' field_declaration_list_opt '}' type_parameters_opt
2554 {
2555 DeclarationNode::newFromTypeData( build_typedef( $3 ) );
2556 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2557 }
2558 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2559 {
2560 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2561 forall = false; // reset
2562 }
2563 '{' field_declaration_list_opt '}' type_parameters_opt
2564 {
2565 DeclarationNode::newFromTypeData( build_type_gen( $3, nullptr ) );
2566 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2567 }
2568 | aggregate_type_nobody
2569 ;
2570
2571type_parameters_opt:
2572 // empty
2573 { $$ = nullptr; } %prec '}'
2574 | '(' type_list ')'
2575 { $$ = $2; }
2576 ;
2577
2578aggregate_type_nobody: // struct, union - {...}
2579 aggregate_key attribute_list_opt identifier
2580 {
2581 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2582 forall = false; // reset
2583 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2584 }
2585 | aggregate_key attribute_list_opt type_name
2586 {
2587 forall = false; // reset
2588 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2589 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2590 // delete newFromTypeGen.
2591 if ( $3->kind == TypeData::SymbolicInst && ! $3->symbolic.isTypedef ) {
2592 $$ = DeclarationNode::newFromTypeData( $3 )->addQualifiers( $2 );
2593 } else {
2594 $$ = DeclarationNode::newAggregate( $1, $3->symbolic.name, $3->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2595 $3->symbolic.name = nullptr; // copied to $$
2596 $3->symbolic.actuals = nullptr;
2597 delete $3;
2598 }
2599 }
2600 ;
2601
2602aggregate_key:
2603 aggregate_data
2604 | aggregate_control
2605 ;
2606
2607aggregate_data:
2608 STRUCT vtable_opt
2609 { $$ = ast::AggregateDecl::Struct; }
2610 | UNION
2611 { $$ = ast::AggregateDecl::Union; }
2612 | EXCEPTION // CFA
2613 { $$ = ast::AggregateDecl::Exception; }
2614 ;
2615
2616aggregate_control: // CFA
2617 MONITOR
2618 { $$ = ast::AggregateDecl::Monitor; }
2619 | MUTEX STRUCT
2620 { $$ = ast::AggregateDecl::Monitor; }
2621 | GENERATOR
2622 { $$ = ast::AggregateDecl::Generator; }
2623 | MUTEX GENERATOR
2624 {
2625 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2626 $$ = ast::AggregateDecl::NoAggregate;
2627 }
2628 | COROUTINE
2629 { $$ = ast::AggregateDecl::Coroutine; }
2630 | MUTEX COROUTINE
2631 {
2632 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2633 $$ = ast::AggregateDecl::NoAggregate;
2634 }
2635 | THREAD
2636 { $$ = ast::AggregateDecl::Thread; }
2637 | MUTEX THREAD
2638 {
2639 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2640 $$ = ast::AggregateDecl::NoAggregate;
2641 }
2642 ;
2643
2644field_declaration_list_opt:
2645 // empty
2646 { $$ = nullptr; }
2647 | field_declaration_list_opt field_declaration
2648 { $$ = $1 ? $1->set_last( $2 ) : $2; }
2649 ;
2650
2651field_declaration:
2652 type_specifier field_declaring_list_opt ';'
2653 {
2654 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2655 $$ = fieldDecl( $1, $2 );
2656 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2657 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2658 // printf( "\tattr %s\n", attr->name.c_str() );
2659 // } // for
2660 }
2661 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2662 {
2663 SemanticError( yylloc, "syntax error, expecting ';' at end of previous declaration." );
2664 $$ = nullptr;
2665 }
2666 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2667 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2668 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2669 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2670 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2671 {
2672 if ( ! $3 ) { // field declarator ?
2673 $3 = DeclarationNode::newName( nullptr );
2674 } // if
2675 $3->inLine = true;
2676 $$ = distAttr( $2, $3 ); // mark all fields in list
2677 distInl( $3 );
2678 }
2679 | INLINE aggregate_control ';' // CFA
2680 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2681 | typedef_declaration ';' // CFA
2682 | cfa_field_declaring_list ';' // CFA, new style field declaration
2683 | EXTENSION cfa_field_declaring_list ';' // GCC
2684 { distExt( $2 ); $$ = $2; } // mark all fields in list
2685 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2686 { $$ = $2; } // mark all fields in list
2687 | cfa_typedef_declaration ';' // CFA
2688 | static_assert // C11
2689 ;
2690
2691field_declaring_list_opt:
2692 // empty
2693 { $$ = nullptr; }
2694 | field_declaring_list
2695 ;
2696
2697field_declaring_list:
2698 field_declarator
2699 | field_declaring_list ',' attribute_list_opt field_declarator
2700 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2701 ;
2702
2703field_declarator:
2704 bit_subrange_size // C special case, no field name
2705 { $$ = DeclarationNode::newBitfield( $1 ); }
2706 | variable_declarator bit_subrange_size_opt
2707 // A semantic check is required to ensure bit_subrange only appears on integral types.
2708 { $$ = $1->addBitfield( $2 ); }
2709 | variable_type_redeclarator bit_subrange_size_opt
2710 // A semantic check is required to ensure bit_subrange only appears on integral types.
2711 { $$ = $1->addBitfield( $2 ); }
2712 | function_type_redeclarator bit_subrange_size_opt
2713 // A semantic check is required to ensure bit_subrange only appears on integral types.
2714 { $$ = $1->addBitfield( $2 ); }
2715 ;
2716
2717field_abstract_list_opt:
2718 // empty
2719 { $$ = nullptr; }
2720 | field_abstract
2721 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2722 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2723 ;
2724
2725field_abstract:
2726 // no bit fields
2727 variable_abstract_declarator
2728 ;
2729
2730cfa_field_declaring_list: // CFA, new style field declaration
2731 // bit-fields are handled by C declarations
2732 cfa_abstract_declarator_tuple identifier_or_type_name
2733 { $$ = $1->addName( $2 ); }
2734 | cfa_field_declaring_list ',' identifier_or_type_name
2735 { $$ = $1->set_last( $1->cloneType( $3 ) ); }
2736 ;
2737
2738cfa_field_abstract_list: // CFA, new style field declaration
2739 // bit-fields are handled by C declarations
2740 cfa_abstract_declarator_tuple
2741 | cfa_field_abstract_list ','
2742 { $$ = $1->set_last( $1->cloneType( 0 ) ); }
2743 ;
2744
2745bit_subrange_size_opt:
2746 // empty
2747 { $$ = nullptr; }
2748 | bit_subrange_size
2749 ;
2750
2751bit_subrange_size:
2752 ':' assignment_expression
2753 { $$ = $2; }
2754 ;
2755
2756// ************************** ENUMERATION *******************************
2757
2758enum_type:
2759 // anonymous, no type name
2760 ENUM attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2761 {
2762 if ( $3 == EnumHiding::Hide ) {
2763 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2764 } // if
2765 $$ = DeclarationNode::newEnum( nullptr, $5, true, false )->addQualifiers( $2 );
2766 }
2767 | ENUM enumerator_type attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2768 {
2769 if ( $2 && ($2->storageClasses.val != 0 || $2->type->qualifiers.any()) ) {
2770 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2771 }
2772 if ( $4 == EnumHiding::Hide ) {
2773 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2774 } // if
2775 $$ = DeclarationNode::newEnum( nullptr, $6, true, true, $2 )->addQualifiers( $3 );
2776 }
2777
2778 // named type
2779 | ENUM attribute_list_opt identifier
2780 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2781 hide_opt '{' enumerator_list comma_opt '}'
2782 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2783 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2784 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2785 | ENUM enumerator_type attribute_list_opt identifier attribute_list_opt
2786 {
2787 if ( $2 && ($2->storageClasses.any() || $2->type->qualifiers.val != 0) ) {
2788 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2789 }
2790 typedefTable.makeTypedef( *$4, "enum_type 2" );
2791 }
2792 hide_opt '{' enumerator_list comma_opt '}'
2793 { $$ = DeclarationNode::newEnum( $4, $9, true, true, $2, $7 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2794 | ENUM enumerator_type attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2795 { $$ = DeclarationNode::newEnum( $4->name, $8, true, true, $2, $6 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2796
2797 // forward declaration
2798 | enum_type_nobody
2799 ;
2800
2801enumerator_type:
2802 '(' ')' // pure enumeration
2803 { $$ = nullptr; }
2804 | '(' cfa_abstract_parameter_declaration ')' // typed enumeration
2805 { $$ = $2; }
2806 ;
2807
2808hide_opt:
2809 // empty
2810 { $$ = EnumHiding::Visible; }
2811 | '!'
2812 { $$ = EnumHiding::Hide; }
2813 ;
2814
2815enum_type_nobody: // enum - {...}
2816 ENUM attribute_list_opt identifier
2817 {
2818 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2819 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2820 }
2821 | ENUM attribute_list_opt type_name
2822 {
2823 typedefTable.makeTypedef( *$3->symbolic.name, "enum_type_nobody 2" );
2824 $$ = DeclarationNode::newEnum( $3->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2825 }
2826 ;
2827
2828enumerator_list:
2829 visible_hide_opt identifier_or_type_name enumerator_value_opt
2830 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2831 | INLINE type_name
2832 {
2833 $$ = DeclarationNode::newEnumInLine( $2->symbolic.name );
2834 $2->symbolic.name = nullptr;
2835 delete $2;
2836 }
2837 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2838 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2839 | enumerator_list ',' INLINE type_name
2840 { $$ = $1->set_last( DeclarationNode::newEnumInLine( $4->symbolic.name ) ); }
2841 ;
2842
2843visible_hide_opt:
2844 hide_opt
2845 | '^'
2846 { $$ = EnumHiding::Visible; }
2847 ;
2848
2849enumerator_value_opt:
2850 // empty
2851 { $$ = nullptr; }
2852 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2853 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2854 // | simple_assignment_operator initializer
2855 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2856 ;
2857
2858// ************************** FUNCTION PARAMETERS *******************************
2859
2860parameter_list_ellipsis_opt:
2861 // empty
2862 { $$ = nullptr; }
2863 | ELLIPSIS
2864 { $$ = nullptr; }
2865 | parameter_list
2866 | parameter_list ',' ELLIPSIS
2867 { $$ = $1->addVarArgs(); }
2868 ;
2869
2870parameter_list: // abstract + real
2871 parameter_declaration
2872 | abstract_parameter_declaration
2873 | parameter_list ',' parameter_declaration
2874 { $$ = $1->set_last( $3 ); }
2875 | parameter_list ',' abstract_parameter_declaration
2876 { $$ = $1->set_last( $3 ); }
2877 ;
2878
2879cfa_parameter_list_ellipsis_opt: // CFA, abstract + real
2880 // empty
2881 { $$ = DeclarationNode::newFromTypeData( build_basic_type( TypeData::Void ) ); }
2882 | ELLIPSIS
2883 { $$ = nullptr; }
2884 | cfa_parameter_list
2885 | cfa_abstract_parameter_list
2886 | cfa_parameter_list ',' cfa_abstract_parameter_list
2887 { $$ = $1->set_last( $3 ); }
2888 | cfa_parameter_list ',' ELLIPSIS
2889 { $$ = $1->addVarArgs(); }
2890 | cfa_abstract_parameter_list ',' ELLIPSIS
2891 { $$ = $1->addVarArgs(); }
2892 ;
2893
2894cfa_parameter_list: // CFA
2895 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2896 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2897 cfa_parameter_declaration
2898 | cfa_abstract_parameter_list ',' cfa_parameter_declaration
2899 { $$ = $1->set_last( $3 ); }
2900 | cfa_parameter_list ',' cfa_parameter_declaration
2901 { $$ = $1->set_last( $3 ); }
2902 | cfa_parameter_list ',' cfa_abstract_parameter_list ',' cfa_parameter_declaration
2903 { $$ = $1->set_last( $3 )->set_last( $5 ); }
2904 ;
2905
2906cfa_abstract_parameter_list: // CFA, new & old style abstract
2907 cfa_abstract_parameter_declaration
2908 | cfa_abstract_parameter_list ',' cfa_abstract_parameter_declaration
2909 { $$ = $1->set_last( $3 ); }
2910 ;
2911
2912// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2913// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2914
2915parameter_declaration:
2916 // No SUE declaration in parameter list.
2917 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2918 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2919 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2920 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2921 ;
2922
2923abstract_parameter_declaration:
2924 declaration_specifier_nobody default_initializer_opt
2925 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2926 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2927 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2928 ;
2929
2930cfa_parameter_declaration: // CFA, new & old style parameter declaration
2931 parameter_declaration
2932 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2933 { $$ = $1->addName( $2 ); }
2934 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2935 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2936 { $$ = $1->addName( $2 ); }
2937 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2938 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2939 | cfa_function_specifier // int f( "int fp()" );
2940 ;
2941
2942cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2943 abstract_parameter_declaration
2944 | cfa_identifier_parameter_declarator_no_tuple
2945 | cfa_abstract_tuple
2946 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2947 | type_qualifier_list cfa_abstract_tuple
2948 { $$ = $2->addQualifiers( $1 ); }
2949 | cfa_abstract_function // int f( "int ()" );
2950 ;
2951
2952// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2953// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2954// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2955
2956identifier_list: // K&R-style parameter list => no types
2957 identifier
2958 { $$ = DeclarationNode::newName( $1 ); }
2959 | identifier_list ',' identifier
2960 { $$ = $1->set_last( DeclarationNode::newName( $3 ) ); }
2961 ;
2962
2963identifier_or_type_name:
2964 identifier
2965 | TYPEDEFname
2966 | TYPEGENname
2967 ;
2968
2969type_no_function: // sizeof, alignof, cast (constructor)
2970 cfa_abstract_declarator_tuple // CFA
2971 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2972 | type_specifier abstract_declarator
2973 { $$ = $2->addType( $1 ); }
2974 ;
2975
2976type: // typeof, assertion
2977 type_no_function
2978 | cfa_abstract_function // CFA
2979 ;
2980
2981initializer_opt:
2982 // empty
2983 { $$ = nullptr; }
2984 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2985 | '=' VOID { $$ = new InitializerNode( true ); }
2986 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2987 ;
2988
2989initializer:
2990 assignment_expression { $$ = new InitializerNode( $1 ); }
2991 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2992 ;
2993
2994initializer_list_opt:
2995 // empty
2996 { $$ = nullptr; }
2997 | initializer
2998 | designation initializer { $$ = $2->set_designators( $1 ); }
2999 | initializer_list_opt ',' initializer { $$ = $1->set_last( $3 ); }
3000 | initializer_list_opt ',' designation initializer { $$ = $1->set_last( $4->set_designators( $3 ) ); }
3001 ;
3002
3003// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
3004// '=' to separator the designator from the initializer value, as in:
3005//
3006// int x[10] = { [1] = 3 };
3007//
3008// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
3009// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
3010// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
3011// shift/reduce conflicts
3012
3013designation:
3014 designator_list ':' // C99, CFA uses ":" instead of "="
3015 | identifier_at ':' // GCC, field name
3016 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
3017 ;
3018
3019designator_list: // C99
3020 designator
3021 | designator_list designator
3022 { $$ = $1->set_last( $2 ); }
3023 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
3024 ;
3025
3026designator:
3027 '.' identifier_at // C99, field name
3028 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
3029 | '[' push assignment_expression pop ']' // C99, single array element
3030 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
3031 { $$ = $3; }
3032 | '[' push subrange pop ']' // CFA, multiple array elements
3033 { $$ = $3; }
3034 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
3035 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
3036 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
3037 { $$ = $4; }
3038 ;
3039
3040// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
3041// rather than an object-oriented type system. This required four groups of extensions:
3042//
3043// Overloading: function, data, and operator identifiers may be overloaded.
3044//
3045// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
3046// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
3047// definitions of new types. Type declarations with storage class "extern" provide opaque types.
3048//
3049// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
3050// site. A polymorphic function is not a template; it is a function, with an address and a type.
3051//
3052// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
3053// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
3054// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
3055// types provide the operations declared by a specification. Assertions are normally used to declare requirements
3056// on type arguments of polymorphic functions.
3057
3058type_parameter_list: // CFA
3059 type_parameter
3060 | type_parameter_list ',' type_parameter
3061 { $$ = $1->set_last( $3 ); }
3062 ;
3063
3064type_initializer_opt: // CFA
3065 // empty
3066 { $$ = nullptr; }
3067 | '=' type
3068 { $$ = $2; }
3069 ;
3070
3071type_parameter: // CFA
3072 type_class identifier_or_type_name
3073 {
3074 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
3075 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
3076 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
3077 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
3078 }
3079 type_initializer_opt assertion_list_opt
3080 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3081 | identifier_or_type_name new_type_class
3082 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
3083 type_initializer_opt assertion_list_opt
3084 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3085 | '[' identifier_or_type_name ']'
3086 {
3087 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
3088 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
3089 }
3090 // | type_specifier identifier_parameter_declarator
3091 | assertion_list
3092 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
3093 | ENUM '(' identifier_or_type_name ')' identifier_or_type_name new_type_class type_initializer_opt assertion_list_opt
3094 {
3095 typedefTable.addToScope( *$3, TYPEDIMname, "type_parameter 4" );
3096 typedefTable.addToScope( *$5, TYPEDIMname, "type_parameter 5" );
3097 $$ = DeclarationNode::newTypeParam( $6, $5 )->addTypeInitializer( $7 )->addAssertions( $8 );
3098 }
3099 ;
3100
3101new_type_class: // CFA
3102 // empty
3103 { $$ = ast::TypeDecl::Otype; }
3104 | '&'
3105 { $$ = ast::TypeDecl::Dtype; }
3106 | '*'
3107 { $$ = ast::TypeDecl::DStype; } // Dtype + sized
3108 // | '(' '*' ')' // Gregor made me do it
3109 // { $$ = ast::TypeDecl::Ftype; }
3110 | ELLIPSIS
3111 { $$ = ast::TypeDecl::Ttype; }
3112 ;
3113
3114type_class: // CFA
3115 OTYPE
3116 { $$ = ast::TypeDecl::Otype; }
3117 | DTYPE
3118 { $$ = ast::TypeDecl::Dtype; }
3119 | FTYPE
3120 { $$ = ast::TypeDecl::Ftype; }
3121 | TTYPE
3122 { $$ = ast::TypeDecl::Ttype; }
3123 ;
3124
3125assertion_list_opt: // CFA
3126 // empty
3127 { $$ = nullptr; }
3128 | assertion_list
3129 ;
3130
3131assertion_list: // CFA
3132 assertion
3133 | assertion_list assertion
3134 { $$ = $1->set_last( $2 ); }
3135 ;
3136
3137assertion: // CFA
3138 '|' identifier_or_type_name '(' type_list ')'
3139 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3140 | '|' '{' push trait_declaration_list pop '}'
3141 { $$ = $4; }
3142 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3143 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3144 ;
3145
3146type_list: // CFA
3147 type
3148 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3149 | assignment_expression
3150 | type_list ',' type
3151 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3152 | type_list ',' assignment_expression
3153 { $$ = $1->set_last( $3 ); }
3154 ;
3155
3156type_declaring_list: // CFA
3157 OTYPE type_declarator
3158 { $$ = $2; }
3159 | storage_class_list OTYPE type_declarator
3160 { $$ = $3->addQualifiers( $1 ); }
3161 | type_declaring_list ',' type_declarator
3162 { $$ = $1->set_last( $3->copySpecifiers( $1 ) ); }
3163 ;
3164
3165type_declarator: // CFA
3166 type_declarator_name assertion_list_opt
3167 { $$ = $1->addAssertions( $2 ); }
3168 | type_declarator_name assertion_list_opt '=' type
3169 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3170 ;
3171
3172type_declarator_name: // CFA
3173 identifier_or_type_name
3174 {
3175 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3176 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3177 }
3178 | identifier_or_type_name '(' type_parameter_list ')'
3179 {
3180 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3181 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3182 }
3183 ;
3184
3185trait_specifier: // CFA
3186 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3187 {
3188 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3189 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3190 }
3191 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3192 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3193 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3194 {
3195 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3196 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3197 }
3198 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3199 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3200 ;
3201
3202trait_declaration_list: // CFA
3203 trait_declaration
3204 | trait_declaration_list pop push trait_declaration
3205 { $$ = $1->set_last( $4 ); }
3206 ;
3207
3208trait_declaration: // CFA
3209 cfa_trait_declaring_list ';'
3210 | trait_declaring_list ';'
3211 ;
3212
3213cfa_trait_declaring_list: // CFA
3214 cfa_variable_specifier
3215 | cfa_function_specifier
3216 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3217 { $$ = $1->set_last( $1->cloneType( $5 ) ); }
3218 ;
3219
3220trait_declaring_list: // CFA
3221 type_specifier declarator
3222 { $$ = $2->addType( $1 ); }
3223 | trait_declaring_list pop ',' push declarator
3224 { $$ = $1->set_last( $1->cloneBaseType( $5 ) ); }
3225 ;
3226
3227// **************************** EXTERNAL DEFINITIONS *****************************
3228
3229translation_unit:
3230 // empty, input file
3231 | external_definition_list
3232 { parseTree = parseTree ? parseTree->set_last( $1 ) : $1; }
3233 ;
3234
3235external_definition_list:
3236 push external_definition pop
3237 { $$ = $2; }
3238 | external_definition_list push external_definition pop
3239 { $$ = $1 ? $1->set_last( $3 ) : $3; }
3240 ;
3241
3242external_definition_list_opt:
3243 // empty
3244 { $$ = nullptr; }
3245 | external_definition_list
3246 ;
3247
3248up:
3249 { typedefTable.up( forall ); forall = false; }
3250 ;
3251
3252down:
3253 { typedefTable.down(); }
3254 ;
3255
3256external_definition:
3257 DIRECTIVE
3258 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3259 | declaration
3260 {
3261 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3262 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3263 // disallowed at the moment.
3264 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static &&
3265 $1->type && $1->type->kind == TypeData::AggregateInst ) {
3266 if ( $1->type->aggInst.aggregate->aggregate.anon ) {
3267 SemanticError( yylloc, "extern anonymous aggregate is currently unimplemented." ); $$ = nullptr;
3268 }
3269 }
3270 }
3271 | IDENTIFIER IDENTIFIER
3272 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3273 | IDENTIFIER type_qualifier // invalid syntax rule
3274 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3275 | IDENTIFIER storage_class // invalid syntax rule
3276 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3277 | IDENTIFIER basic_type_name // invalid syntax rule
3278 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3279 | IDENTIFIER TYPEDEFname // invalid syntax rule
3280 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3281 | IDENTIFIER TYPEGENname // invalid syntax rule
3282 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3283 | external_function_definition
3284 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3285 {
3286 distExt( $2 ); // mark all fields in list
3287 $$ = $2;
3288 }
3289 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3290 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3291 | EXTERN STRINGliteral
3292 {
3293 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3294 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3295 }
3296 up external_definition down
3297 {
3298 linkage = linkageStack.top();
3299 linkageStack.pop();
3300 $$ = $5;
3301 }
3302 | EXTERN STRINGliteral // C++-style linkage specifier
3303 {
3304 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3305 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3306 }
3307 '{' up external_definition_list_opt down '}'
3308 {
3309 linkage = linkageStack.top();
3310 linkageStack.pop();
3311 $$ = $6;
3312 }
3313 // global distribution
3314 | type_qualifier_list
3315 {
3316 if ( $1->type->qualifiers.any() ) {
3317 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3318 }
3319 if ( $1->type->forall ) forall = true; // remember generic type
3320 }
3321 '{' up external_definition_list_opt down '}' // CFA, namespace
3322 {
3323 distQual( $5, $1 );
3324 forall = false;
3325 $$ = $5;
3326 }
3327 | declaration_qualifier_list
3328 {
3329 if ( $1->type && $1->type->qualifiers.any() ) {
3330 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3331 }
3332 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3333 }
3334 '{' up external_definition_list_opt down '}' // CFA, namespace
3335 {
3336 distQual( $5, $1 );
3337 forall = false;
3338 $$ = $5;
3339 }
3340 | declaration_qualifier_list type_qualifier_list
3341 {
3342 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3343 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3344 }
3345 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3346 }
3347 '{' up external_definition_list_opt down '}' // CFA, namespace
3348 {
3349 distQual( $6, $1->addQualifiers( $2 ) );
3350 forall = false;
3351 $$ = $6;
3352 }
3353 ;
3354
3355external_function_definition:
3356 function_definition
3357 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3358 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3359 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3360 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3361 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3362 | function_declarator compound_statement
3363 { $$ = $1->addFunctionBody( $2 ); }
3364 | KR_function_declarator KR_parameter_list_opt compound_statement
3365 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3366 ;
3367
3368with_clause_opt:
3369 // empty
3370 { $$ = nullptr; forall = false; }
3371 | WITH '(' type_list ')' attribute_list_opt // support scoped enumeration
3372 {
3373 $$ = $3; forall = false;
3374 if ( $5 ) {
3375 SemanticError( yylloc, "syntax error, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3376 $$ = nullptr;
3377 } // if
3378 }
3379 ;
3380
3381function_definition:
3382 cfa_function_declaration with_clause_opt compound_statement // CFA
3383 {
3384 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3385 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3386 $1->get_last()->addFunctionBody( $3, $2 );
3387 $$ = $1;
3388 }
3389 | declaration_specifier function_declarator with_clause_opt compound_statement
3390 {
3391 rebindForall( $1, $2 );
3392 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3393 }
3394 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3395 {
3396 rebindForall( $1, $2 );
3397 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3398 }
3399 // handles default int return type, OBSOLESCENT (see 1)
3400 | type_qualifier_list function_declarator with_clause_opt compound_statement
3401 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3402 // handles default int return type, OBSOLESCENT (see 1)
3403 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3404 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3405 // handles default int return type, OBSOLESCENT (see 1)
3406 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3407 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3408
3409 // Old-style K&R function definition, OBSOLESCENT (see 4)
3410 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3411 {
3412 rebindForall( $1, $2 );
3413 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3414 }
3415 // handles default int return type, OBSOLESCENT (see 1)
3416 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3417 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3418 // handles default int return type, OBSOLESCENT (see 1)
3419 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3420 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3421 // handles default int return type, OBSOLESCENT (see 1)
3422 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3423 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3424 ;
3425
3426declarator:
3427 variable_declarator
3428 | variable_type_redeclarator
3429 | function_declarator
3430 | function_type_redeclarator
3431 ;
3432
3433subrange:
3434 constant_expression '~' constant_expression // CFA, integer subrange
3435 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3436 ;
3437
3438// **************************** ASM *****************************
3439
3440asm_name_opt: // GCC
3441 // empty
3442 { $$ = nullptr; }
3443 | ASM '(' string_literal ')' attribute_list_opt
3444 {
3445 DeclarationNode * name = new DeclarationNode();
3446 name->asmName = maybeMoveBuild( $3 );
3447 $$ = name->addQualifiers( $5 );
3448 }
3449 ;
3450
3451// **************************** ATTRIBUTE *****************************
3452
3453attribute_list_opt: // GCC
3454 // empty
3455 { $$ = nullptr; }
3456 | attribute_list
3457 ;
3458
3459attribute_list: // GCC
3460 attribute
3461 | attribute_list attribute
3462 { $$ = $2->addQualifiers( $1 ); }
3463 ;
3464
3465attribute: // GCC
3466 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3467 { $$ = $4; }
3468 | ATTRIBUTE '(' attribute_name_list ')' // CFA
3469 { $$ = $3; }
3470 | ATTR '(' attribute_name_list ')' // CFA
3471 { $$ = $3; }
3472 ;
3473
3474attribute_name_list: // GCC
3475 attribute_name
3476 | attribute_name_list ',' attribute_name
3477 { $$ = $3->addQualifiers( $1 ); }
3478 ;
3479
3480attribute_name: // GCC
3481 // empty
3482 { $$ = nullptr; }
3483 | attr_name
3484 { $$ = DeclarationNode::newAttribute( $1 ); }
3485 | attr_name '(' argument_expression_list_opt ')'
3486 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3487 ;
3488
3489attr_name: // GCC
3490 IDENTIFIER
3491 | quasi_keyword
3492 | TYPEDEFname
3493 | TYPEGENname
3494 | FALLTHROUGH
3495 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3496 | CONST
3497 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3498 ;
3499
3500// ============================================================================
3501// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3502// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3503// in:
3504//
3505// int (*f())[10] { ... };
3506// ... (*f())[3] += 1; // definition mimics usage
3507//
3508// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3509// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3510// ============================================================================
3511
3512// ----------------------------------------------------------------------------
3513// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3514// to define a variable or function prototype, e.g.:
3515//
3516// valid declaration invalid definition
3517// ----------------- ------------------
3518// int f; int f {}
3519// int *f; int *f {}
3520// int f[10]; int f[10] {}
3521// int (*f)(int); int (*f)(int) {}
3522//
3523// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3524// variable_declarator and function_declarator.
3525// ----------------------------------------------------------------------------
3526
3527// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3528// declaring an array of functions versus a pointer to an array of functions.
3529
3530paren_identifier:
3531 identifier_at
3532 { $$ = DeclarationNode::newName( $1 ); }
3533 | '(' paren_identifier ')' // redundant parenthesis
3534 { $$ = $2; }
3535 ;
3536
3537variable_declarator:
3538 paren_identifier attribute_list_opt
3539 { $$ = $1->addQualifiers( $2 ); }
3540 | variable_ptr
3541 | variable_array attribute_list_opt
3542 { $$ = $1->addQualifiers( $2 ); }
3543 | variable_function attribute_list_opt
3544 { $$ = $1->addQualifiers( $2 ); }
3545 ;
3546
3547variable_ptr:
3548 ptrref_operator variable_declarator
3549 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3550 | ptrref_operator type_qualifier_list variable_declarator
3551 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3552 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3553 { $$ = $2->addQualifiers( $4 ); }
3554 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3555 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3556 ;
3557
3558variable_array:
3559 paren_identifier array_dimension
3560 { $$ = $1->addArray( $2 ); }
3561 | '(' variable_ptr ')' array_dimension
3562 { $$ = $2->addArray( $4 ); }
3563 | '(' attribute_list variable_ptr ')' array_dimension
3564 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3565 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3566 { $$ = $2->addArray( $4 ); }
3567 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3568 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3569 | '(' variable_array ')' // redundant parenthesis
3570 { $$ = $2; }
3571 | '(' attribute_list variable_array ')' // redundant parenthesis
3572 { $$ = $3->addQualifiers( $2 ); }
3573 ;
3574
3575variable_function:
3576 '(' variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3577 { $$ = $2->addParamList( $5 ); }
3578 | '(' attribute_list variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3579 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3580 | '(' variable_function ')' // redundant parenthesis
3581 { $$ = $2; }
3582 | '(' attribute_list variable_function ')' // redundant parenthesis
3583 { $$ = $3->addQualifiers( $2 ); }
3584 ;
3585
3586// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3587// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3588// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3589
3590function_declarator:
3591 function_no_ptr attribute_list_opt
3592 { $$ = $1->addQualifiers( $2 ); }
3593 | function_ptr
3594 | function_array attribute_list_opt
3595 { $$ = $1->addQualifiers( $2 ); }
3596 ;
3597
3598function_no_ptr:
3599 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3600 { $$ = $1->addParamList( $3 ); }
3601 | '(' function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3602 { $$ = $2->addParamList( $5 ); }
3603 | '(' attribute_list function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3604 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3605 | '(' function_no_ptr ')' // redundant parenthesis
3606 { $$ = $2; }
3607 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3608 { $$ = $3->addQualifiers( $2 ); }
3609 ;
3610
3611function_ptr:
3612 ptrref_operator function_declarator
3613 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3614 | ptrref_operator type_qualifier_list function_declarator
3615 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3616 | '(' function_ptr ')' attribute_list_opt
3617 { $$ = $2->addQualifiers( $4 ); }
3618 | '(' attribute_list function_ptr ')' attribute_list_opt
3619 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3620 ;
3621
3622function_array:
3623 '(' function_ptr ')' array_dimension
3624 { $$ = $2->addArray( $4 ); }
3625 | '(' attribute_list function_ptr ')' array_dimension
3626 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3627 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3628 { $$ = $2->addArray( $4 ); }
3629 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3630 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3631 | '(' function_array ')' // redundant parenthesis
3632 { $$ = $2; }
3633 | '(' attribute_list function_array ')' // redundant parenthesis
3634 { $$ = $3->addQualifiers( $2 ); }
3635 ;
3636
3637// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3638//
3639// f( a, b, c ) int a, *b, c[]; {}
3640//
3641// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3642// returning arrays and functions versus pointers to arrays and functions.
3643
3644KR_function_declarator:
3645 KR_function_no_ptr
3646 | KR_function_ptr
3647 | KR_function_array
3648 ;
3649
3650KR_function_no_ptr:
3651 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3652 { $$ = $1->addIdList( $3 ); }
3653 | '(' KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3654 { $$ = $2->addParamList( $5 ); }
3655 | '(' attribute_list KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3656 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3657 | '(' KR_function_no_ptr ')' // redundant parenthesis
3658 { $$ = $2; }
3659 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3660 { $$ = $3->addQualifiers( $2 ); }
3661 ;
3662
3663KR_function_ptr:
3664 ptrref_operator KR_function_declarator
3665 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3666 | ptrref_operator type_qualifier_list KR_function_declarator
3667 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3668 | '(' KR_function_ptr ')'
3669 { $$ = $2; }
3670 | '(' attribute_list KR_function_ptr ')'
3671 { $$ = $3->addQualifiers( $2 ); }
3672 ;
3673
3674KR_function_array:
3675 '(' KR_function_ptr ')' array_dimension
3676 { $$ = $2->addArray( $4 ); }
3677 | '(' attribute_list KR_function_ptr ')' array_dimension
3678 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3679 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3680 { $$ = $2->addArray( $4 ); }
3681 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3682 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3683 | '(' KR_function_array ')' // redundant parenthesis
3684 { $$ = $2; }
3685 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3686 { $$ = $3->addQualifiers( $2 ); }
3687 ;
3688
3689// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3690//
3691// typedef int foo;
3692// {
3693// int foo; // redefine typedef name in new scope
3694// }
3695
3696paren_type:
3697 typedef_name
3698 {
3699 // hide type name in enclosing scope by variable name
3700 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3701 }
3702 | '(' paren_type ')'
3703 { $$ = $2; }
3704 ;
3705
3706variable_type_redeclarator:
3707 paren_type attribute_list_opt
3708 { $$ = $1->addQualifiers( $2 ); }
3709 | variable_type_ptr
3710 | variable_type_array attribute_list_opt
3711 { $$ = $1->addQualifiers( $2 ); }
3712 | variable_type_function attribute_list_opt
3713 { $$ = $1->addQualifiers( $2 ); }
3714 ;
3715
3716variable_type_ptr:
3717 ptrref_operator variable_type_redeclarator
3718 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3719 | ptrref_operator type_qualifier_list variable_type_redeclarator
3720 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3721 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3722 { $$ = $2->addQualifiers( $4 ); }
3723 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3724 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3725 ;
3726
3727variable_type_array:
3728 paren_type array_dimension
3729 { $$ = $1->addArray( $2 ); }
3730 | '(' variable_type_ptr ')' array_dimension
3731 { $$ = $2->addArray( $4 ); }
3732 | '(' attribute_list variable_type_ptr ')' array_dimension
3733 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3734 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3735 { $$ = $2->addArray( $4 ); }
3736 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3737 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3738 | '(' variable_type_array ')' // redundant parenthesis
3739 { $$ = $2; }
3740 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3741 { $$ = $3->addQualifiers( $2 ); }
3742 ;
3743
3744variable_type_function:
3745 '(' variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3746 { $$ = $2->addParamList( $5 ); }
3747 | '(' attribute_list variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3748 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3749 | '(' variable_type_function ')' // redundant parenthesis
3750 { $$ = $2; }
3751 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3752 { $$ = $3->addQualifiers( $2 ); }
3753 ;
3754
3755// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3756// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3757// arrays and functions.
3758
3759function_type_redeclarator:
3760 function_type_no_ptr attribute_list_opt
3761 { $$ = $1->addQualifiers( $2 ); }
3762 | function_type_ptr
3763 | function_type_array attribute_list_opt
3764 { $$ = $1->addQualifiers( $2 ); }
3765 ;
3766
3767function_type_no_ptr:
3768 paren_type '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3769 { $$ = $1->addParamList( $3 ); }
3770 | '(' function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3771 { $$ = $2->addParamList( $5 ); }
3772 | '(' attribute_list function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3773 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3774 | '(' function_type_no_ptr ')' // redundant parenthesis
3775 { $$ = $2; }
3776 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3777 { $$ = $3->addQualifiers( $2 ); }
3778 ;
3779
3780function_type_ptr:
3781 ptrref_operator function_type_redeclarator
3782 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3783 | ptrref_operator type_qualifier_list function_type_redeclarator
3784 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3785 | '(' function_type_ptr ')' attribute_list_opt
3786 { $$ = $2->addQualifiers( $4 ); }
3787 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3788 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3789 ;
3790
3791function_type_array:
3792 '(' function_type_ptr ')' array_dimension
3793 { $$ = $2->addArray( $4 ); }
3794 | '(' attribute_list function_type_ptr ')' array_dimension
3795 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3796 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3797 { $$ = $2->addArray( $4 ); }
3798 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3799 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3800 | '(' function_type_array ')' // redundant parenthesis
3801 { $$ = $2; }
3802 | '(' attribute_list function_type_array ')' // redundant parenthesis
3803 { $$ = $3->addQualifiers( $2 ); }
3804 ;
3805
3806// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3807// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3808// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3809// pointers to arrays and functions.
3810
3811identifier_parameter_declarator:
3812 paren_identifier attribute_list_opt
3813 { $$ = $1->addQualifiers( $2 ); }
3814 | '&' MUTEX paren_identifier attribute_list_opt
3815 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3816 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3817 | identifier_parameter_ptr
3818 | identifier_parameter_array attribute_list_opt
3819 { $$ = $1->addQualifiers( $2 ); }
3820 | identifier_parameter_function attribute_list_opt
3821 { $$ = $1->addQualifiers( $2 ); }
3822 ;
3823
3824identifier_parameter_ptr:
3825 ptrref_operator identifier_parameter_declarator
3826 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3827 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3828 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3829 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3830 { $$ = $2->addQualifiers( $4 ); }
3831 ;
3832
3833identifier_parameter_array:
3834 paren_identifier array_parameter_dimension
3835 { $$ = $1->addArray( $2 ); }
3836 | '(' identifier_parameter_ptr ')' array_dimension
3837 { $$ = $2->addArray( $4 ); }
3838 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3839 { $$ = $2->addArray( $4 ); }
3840 | '(' identifier_parameter_array ')' // redundant parenthesis
3841 { $$ = $2; }
3842 ;
3843
3844identifier_parameter_function:
3845 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3846 { $$ = $1->addParamList( $3 ); }
3847 | '(' identifier_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3848 { $$ = $2->addParamList( $5 ); }
3849 | '(' identifier_parameter_function ')' // redundant parenthesis
3850 { $$ = $2; }
3851 ;
3852
3853// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3854// e.g.:
3855//
3856// typedef int foo;
3857// forall( otype T ) struct foo;
3858// int f( int foo ); // redefine typedef name in new scope
3859//
3860// and allows the C99 array options, which can only appear in a parameter list.
3861
3862type_parameter_redeclarator:
3863 typedef_name attribute_list_opt
3864 { $$ = $1->addQualifiers( $2 ); }
3865 | '&' MUTEX typedef_name attribute_list_opt
3866 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3867 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3868 | type_parameter_ptr
3869 | type_parameter_array attribute_list_opt
3870 { $$ = $1->addQualifiers( $2 ); }
3871 | type_parameter_function attribute_list_opt
3872 { $$ = $1->addQualifiers( $2 ); }
3873 ;
3874
3875typedef_name:
3876 TYPEDEFname
3877 { $$ = DeclarationNode::newName( $1 ); }
3878 | TYPEGENname
3879 { $$ = DeclarationNode::newName( $1 ); }
3880 ;
3881
3882type_parameter_ptr:
3883 ptrref_operator type_parameter_redeclarator
3884 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3885 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3886 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3887 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3888 { $$ = $2->addQualifiers( $4 ); }
3889 ;
3890
3891type_parameter_array:
3892 typedef_name array_parameter_dimension
3893 { $$ = $1->addArray( $2 ); }
3894 | '(' type_parameter_ptr ')' array_parameter_dimension
3895 { $$ = $2->addArray( $4 ); }
3896 ;
3897
3898type_parameter_function:
3899 typedef_name '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3900 { $$ = $1->addParamList( $3 ); }
3901 | '(' type_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3902 { $$ = $2->addParamList( $5 ); }
3903 ;
3904
3905// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3906// which the type applies, e.g.:
3907//
3908// sizeof( int );
3909// sizeof( int * );
3910// sizeof( int [10] );
3911// sizeof( int (*)() );
3912// sizeof( int () );
3913//
3914// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3915// and functions versus pointers to arrays and functions.
3916
3917abstract_declarator:
3918 abstract_ptr
3919 | abstract_array attribute_list_opt
3920 { $$ = $1->addQualifiers( $2 ); }
3921 | abstract_function attribute_list_opt
3922 { $$ = $1->addQualifiers( $2 ); }
3923 ;
3924
3925abstract_ptr:
3926 ptrref_operator
3927 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3928 | ptrref_operator type_qualifier_list
3929 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3930 | ptrref_operator abstract_declarator
3931 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3932 | ptrref_operator type_qualifier_list abstract_declarator
3933 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3934 | '(' abstract_ptr ')' attribute_list_opt
3935 { $$ = $2->addQualifiers( $4 ); }
3936 ;
3937
3938abstract_array:
3939 array_dimension
3940 | '(' abstract_ptr ')' array_dimension
3941 { $$ = $2->addArray( $4 ); }
3942 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3943 { $$ = $2->addArray( $4 ); }
3944 | '(' abstract_array ')' // redundant parenthesis
3945 { $$ = $2; }
3946 ;
3947
3948abstract_function:
3949 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3950 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3951 | '(' abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3952 { $$ = $2->addParamList( $5 ); }
3953 | '(' abstract_function ')' // redundant parenthesis
3954 { $$ = $2; }
3955 ;
3956
3957array_dimension:
3958 // Only the first dimension can be empty.
3959 '[' ']'
3960 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3961 | '[' ']' multi_array_dimension
3962 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3963 // Cannot use constant_expression because of tuples => semantic check
3964 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3965 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3966 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3967
3968 // If needed, the following parses and does not use comma_expression, so the array structure can be built.
3969 // | '[' push assignment_expression pop ',' push array_dimension_list pop ']' // CFA
3970
3971 | '[' push array_type_list pop ']' // CFA
3972 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3973 | multi_array_dimension
3974 ;
3975
3976// array_dimension_list:
3977// assignment_expression
3978// | array_dimension_list ',' assignment_expression
3979// ;
3980
3981array_type_list:
3982 basic_type_name
3983 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3984 | type_name
3985 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3986 | assignment_expression upupeq assignment_expression
3987 | array_type_list ',' basic_type_name
3988 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3989 | array_type_list ',' type_name
3990 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3991 | array_type_list ',' assignment_expression upupeq assignment_expression
3992 ;
3993
3994upupeq:
3995 '~'
3996 { $$ = OperKinds::LThan; }
3997 | ErangeUpEq
3998 { $$ = OperKinds::LEThan; }
3999 ;
4000
4001multi_array_dimension:
4002 '[' push assignment_expression pop ']'
4003 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
4004 | '[' push '*' pop ']' // C99
4005 { $$ = DeclarationNode::newVarArray( 0 ); }
4006 | multi_array_dimension '[' push assignment_expression pop ']'
4007 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
4008 | multi_array_dimension '[' push '*' pop ']' // C99
4009 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
4010 ;
4011
4012// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
4013// identifier to which the type applies, e.g.:
4014//
4015// int f( int ); // not handled here
4016// int f( int * ); // abstract function-prototype parameter; no parameter name specified
4017// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
4018// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
4019//
4020// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
4021// and functions versus pointers to arrays and functions. In addition, the pattern handles the
4022// special meaning of parenthesis around a typedef name:
4023//
4024// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
4025// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
4026// not as redundant parentheses around the identifier."
4027//
4028// For example:
4029//
4030// typedef float T;
4031// int f( int ( T [5] ) ); // see abstract_parameter_declarator
4032// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
4033// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
4034// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
4035//
4036// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
4037// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
4038// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
4039// functions.
4040
4041abstract_parameter_declarator_opt:
4042 // empty
4043 { $$ = nullptr; }
4044 | abstract_parameter_declarator
4045 ;
4046
4047abstract_parameter_declarator:
4048 abstract_parameter_ptr
4049 | '&' MUTEX attribute_list_opt
4050 { $$ = DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
4051 OperKinds::AddressOf )->addQualifiers( $3 ); }
4052 | abstract_parameter_array attribute_list_opt
4053 { $$ = $1->addQualifiers( $2 ); }
4054 | abstract_parameter_function attribute_list_opt
4055 { $$ = $1->addQualifiers( $2 ); }
4056 ;
4057
4058abstract_parameter_ptr:
4059 ptrref_operator
4060 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4061 | ptrref_operator type_qualifier_list
4062 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4063 | ptrref_operator abstract_parameter_declarator
4064 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4065 | ptrref_operator type_qualifier_list abstract_parameter_declarator
4066 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4067 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
4068 { $$ = $2->addQualifiers( $4 ); }
4069 ;
4070
4071abstract_parameter_array:
4072 array_parameter_dimension
4073 | '(' abstract_parameter_ptr ')' array_parameter_dimension
4074 { $$ = $2->addArray( $4 ); }
4075 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
4076 { $$ = $2->addArray( $4 ); }
4077 | '(' abstract_parameter_array ')' // redundant parenthesis
4078 { $$ = $2; }
4079 ;
4080
4081abstract_parameter_function:
4082 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4083 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
4084 | '(' abstract_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4085 { $$ = $2->addParamList( $5 ); }
4086 | '(' abstract_parameter_function ')' // redundant parenthesis
4087 { $$ = $2; }
4088 ;
4089
4090array_parameter_dimension:
4091 // Only the first dimension can be empty or have qualifiers.
4092 array_parameter_1st_dimension
4093 | array_parameter_1st_dimension multi_array_dimension
4094 { $$ = $1->addArray( $2 ); }
4095 | multi_array_dimension
4096 ;
4097
4098// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
4099//
4100// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
4101// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
4102
4103array_parameter_1st_dimension:
4104 '[' ']'
4105 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
4106 // multi_array_dimension handles the '[' '*' ']' case
4107 | '[' push type_qualifier_list '*' pop ']' // remaining C99
4108 { $$ = DeclarationNode::newVarArray( $3 ); }
4109 | '[' push type_qualifier_list pop ']'
4110 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
4111 // multi_array_dimension handles the '[' assignment_expression ']' case
4112 | '[' push type_qualifier_list assignment_expression pop ']'
4113 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4114 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
4115 { $$ = DeclarationNode::newArray( $5, $4, true ); }
4116 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
4117 { $$ = DeclarationNode::newArray( $5, $3, true ); }
4118 ;
4119
4120// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
4121//
4122// struct S {
4123// int;
4124// int *;
4125// int [10];
4126// int (*)();
4127// };
4128
4129variable_abstract_declarator:
4130 variable_abstract_ptr
4131 | variable_abstract_array attribute_list_opt
4132 { $$ = $1->addQualifiers( $2 ); }
4133 | variable_abstract_function attribute_list_opt
4134 { $$ = $1->addQualifiers( $2 ); }
4135 ;
4136
4137variable_abstract_ptr:
4138 ptrref_operator
4139 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4140 | ptrref_operator type_qualifier_list
4141 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4142 | ptrref_operator variable_abstract_declarator
4143 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4144 | ptrref_operator type_qualifier_list variable_abstract_declarator
4145 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4146 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4147 { $$ = $2->addQualifiers( $4 ); }
4148 ;
4149
4150variable_abstract_array:
4151 array_dimension
4152 | '(' variable_abstract_ptr ')' array_dimension
4153 { $$ = $2->addArray( $4 ); }
4154 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4155 { $$ = $2->addArray( $4 ); }
4156 | '(' variable_abstract_array ')' // redundant parenthesis
4157 { $$ = $2; }
4158 ;
4159
4160variable_abstract_function:
4161 '(' variable_abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4162 { $$ = $2->addParamList( $5 ); }
4163 | '(' variable_abstract_function ')' // redundant parenthesis
4164 { $$ = $2; }
4165 ;
4166
4167// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4168// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4169
4170cfa_identifier_parameter_declarator_tuple: // CFA
4171 cfa_identifier_parameter_declarator_no_tuple
4172 | cfa_abstract_tuple
4173 | type_qualifier_list cfa_abstract_tuple
4174 { $$ = $2->addQualifiers( $1 ); }
4175 ;
4176
4177cfa_identifier_parameter_declarator_no_tuple: // CFA
4178 cfa_identifier_parameter_ptr
4179 | cfa_identifier_parameter_array
4180 ;
4181
4182cfa_identifier_parameter_ptr: // CFA
4183 // No SUE declaration in parameter list.
4184 ptrref_operator type_specifier_nobody
4185 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4186 | type_qualifier_list ptrref_operator type_specifier_nobody
4187 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4188 | ptrref_operator cfa_abstract_function
4189 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4190 | type_qualifier_list ptrref_operator cfa_abstract_function
4191 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4192 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4193 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4194 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4195 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4196 ;
4197
4198cfa_identifier_parameter_array: // CFA
4199 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4200 // shift/reduce conflict with new-style empty (void) function return type.
4201 '[' ']' type_specifier_nobody
4202 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4203 | cfa_array_parameter_1st_dimension type_specifier_nobody
4204 { $$ = $2->addNewArray( $1 ); }
4205 | '[' ']' multi_array_dimension type_specifier_nobody
4206 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4207 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4208 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4209 | multi_array_dimension type_specifier_nobody
4210 { $$ = $2->addNewArray( $1 ); }
4211
4212 | '[' ']' cfa_identifier_parameter_ptr
4213 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4214 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4215 { $$ = $2->addNewArray( $1 ); }
4216 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4217 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4218 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4219 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4220 | multi_array_dimension cfa_identifier_parameter_ptr
4221 { $$ = $2->addNewArray( $1 ); }
4222 ;
4223
4224cfa_array_parameter_1st_dimension:
4225 '[' push type_qualifier_list '*' pop ']' // remaining C99
4226 { $$ = DeclarationNode::newVarArray( $3 ); }
4227 | '[' push type_qualifier_list assignment_expression pop ']'
4228 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4229 | '[' push declaration_qualifier_list assignment_expression pop ']'
4230 // declaration_qualifier_list must be used because of shift/reduce conflict with
4231 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4232 // appear in this context.
4233 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4234 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4235 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4236 ;
4237
4238// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4239// identifier to which the type applies, e.g.:
4240//
4241// [int] f( int ); // abstract variable parameter; no parameter name specified
4242// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4243//
4244// These rules need LR(3):
4245//
4246// cfa_abstract_tuple identifier_or_type_name
4247// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
4248//
4249// since a function return type can be syntactically identical to a tuple type:
4250//
4251// [int, int] t;
4252// [int, int] f( int );
4253//
4254// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4255// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4256// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4257// duplicated when appearing with cfa_function_specifier.
4258
4259cfa_abstract_declarator_tuple: // CFA
4260 cfa_abstract_tuple
4261 | type_qualifier_list cfa_abstract_tuple
4262 { $$ = $2->addQualifiers( $1 ); }
4263 | cfa_abstract_declarator_no_tuple
4264 ;
4265
4266cfa_abstract_declarator_no_tuple: // CFA
4267 cfa_abstract_ptr
4268 | cfa_abstract_array
4269 ;
4270
4271cfa_abstract_ptr: // CFA
4272 ptrref_operator type_specifier
4273 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4274 | type_qualifier_list ptrref_operator type_specifier
4275 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4276 | ptrref_operator cfa_abstract_function
4277 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4278 | type_qualifier_list ptrref_operator cfa_abstract_function
4279 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4280 | ptrref_operator cfa_abstract_declarator_tuple
4281 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4282 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4283 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4284 ;
4285
4286cfa_abstract_array: // CFA
4287 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4288 // empty (void) function return type.
4289 '[' ']' type_specifier
4290 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4291 | '[' ']' multi_array_dimension type_specifier
4292 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4293 | multi_array_dimension type_specifier
4294 { $$ = $2->addNewArray( $1 ); }
4295 | '[' ']' cfa_abstract_ptr
4296 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4297 | '[' ']' multi_array_dimension cfa_abstract_ptr
4298 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4299 | multi_array_dimension cfa_abstract_ptr
4300 { $$ = $2->addNewArray( $1 ); }
4301 ;
4302
4303cfa_abstract_tuple: // CFA
4304 '[' push cfa_abstract_parameter_list pop ']'
4305 { $$ = DeclarationNode::newTuple( $3 ); }
4306 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4307 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4308 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4309 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4310 ;
4311
4312cfa_abstract_function: // CFA
4313 '[' ']' '(' cfa_parameter_list_ellipsis_opt ')'
4314 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4315 | cfa_abstract_tuple '(' push cfa_parameter_list_ellipsis_opt pop ')'
4316 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4317 | cfa_function_return '(' push cfa_parameter_list_ellipsis_opt pop ')'
4318 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4319 ;
4320
4321// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4322// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4323//
4324// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4325// the declaration specifiers in a declaration is an obsolescent feature."
4326//
4327// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4328// prototype-format parameter type declarators) is an obsolescent feature."
4329//
4330// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4331// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4332
4333// ************************ MISCELLANEOUS ********************************
4334
4335comma_opt: // redundant comma
4336 // empty
4337 | ','
4338 ;
4339
4340default_initializer_opt:
4341 // empty
4342 { $$ = nullptr; }
4343 | '=' assignment_expression
4344 { $$ = $2; }
4345 ;
4346
4347%%
4348
4349// ----end of grammar----
4350
4351// Local Variables: //
4352// mode: c++ //
4353// tab-width: 4 //
4354// compile-command: "bison -Wcounterexamples parser.yy" //
4355// End: //
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