source: src/Parser/parser.yy@ e72fc60

Last change on this file since e72fc60 was 6cef439, checked in by Andrew Beach <ajbeach@…>, 22 months ago

Return 'TypeData *' from some parse rules. Moved TypeData construction over to that file.
  • Property mode set to 100644
File size: 177.9 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 : Wed Mar 6 10:51:55 2024
13// Update Count : 6588
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.h" // for DeclarationNode, ...
51#include "ExpressionNode.h" // for ExpressionNode, ...
52#include "InitializerNode.h" // for InitializerNode, ...
53#include "ParserTypes.h"
54#include "StatementNode.h" // for build_...
55#include "TypedefTable.h"
56#include "TypeData.h"
57#include "Common/SemanticError.h" // error_str
58#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
59
60// lex uses __null in a boolean context, it's fine.
61#ifdef __clang__
62#pragma GCC diagnostic ignored "-Wparentheses-equality"
63#endif
64
65extern DeclarationNode * parseTree;
66extern ast::Linkage::Spec linkage;
67extern TypedefTable typedefTable;
68
69stack<ast::Linkage::Spec> linkageStack;
70
71bool appendStr( string & to, string & from ) {
72 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
73 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
74 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
75 // easier to let the C compiler handle this case.
76 //
77 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
78 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
79 // e.g., u"a" U"b" L"c" is disallowed.
80
81 if ( from[0] != '"' ) { // encoding ?
82 if ( to[0] != '"' ) { // encoding ?
83 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
84 yyerror( "non-matching string encodings for string-literal concatenation" );
85 return false; // parse error, must call YYERROR in action
86 } else if ( from[1] == '8' ) {
87 from.erase( 0, 1 ); // remove 2nd encoding
88 } // if
89 } else {
90 if ( from[1] == '8' ) { // move encoding to start
91 to = "u8" + to;
92 from.erase( 0, 1 ); // remove 2nd encoding
93 } else {
94 to = from[0] + to;
95 } // if
96 } // if
97 from.erase( 0, 1 ); // remove 2nd encoding
98 } // if
99 to += " " + from; // concatenated into single string
100 return true;
101} // appendStr
102
103DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
104 // Distribute type specifier across all declared variables, e.g., static, const, __attribute__.
105 assert( declList );
106
107 // Do not distribute attributes for aggregates because the attributes surrounding the aggregate belong it not the
108 // variables in the declaration list, e.g.,
109 //
110 // struct __attribute__(( aligned(128) )) S { ...
111 // } v1 __attribute__(( aligned(64) )), v2 __attribute__(( aligned(32) )), v3;
112 // struct S v4;
113 //
114 // v1 => 64, v2 =>32, v3 => 128, v2 => 128
115 //
116 // Anonymous aggregates are a special case because there is no aggregate to bind the attribute to; hence it floats
117 // to the declaration list.
118 //
119 // struct __attribute__(( aligned(128) )) /*anonymous */ { ... } v1;
120 //
121 // v1 => 128
122
123 bool copyattr = ! (typeSpec->type && typeSpec->type->kind == TypeData::Aggregate && ! typeSpec->type->aggregate.anon );
124
125 // addType copies the type information for the aggregate instances from typeSpec into cl's aggInst.aggregate.
126 DeclarationNode * cl = (new DeclarationNode)->addType( typeSpec ); // typeSpec IS DELETED!!!
127
128 // Start at second variable in declaration list and clone the type specifiers for each variable.
129 for ( DeclarationNode * cur = declList->next ; cur != nullptr; cur = cur->next ) {
130 cl->cloneBaseType( cur, copyattr ); // cur is modified
131 } // for
132
133 // Add first variable in declaration list with hidden type information in aggInst.aggregate, which is used by
134 // extractType to recover the type for the aggregate instances.
135 declList->addType( cl, copyattr ); // cl IS DELETED!!!
136 return declList;
137} // distAttr
138
139void distExt( DeclarationNode * declaration ) {
140 // distribute EXTENSION across all declarations
141 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
142 iter->set_extension( true );
143 } // for
144} // distExt
145
146void distInl( DeclarationNode * declaration ) {
147 // distribute INLINE across all declarations
148 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
149 iter->set_inLine( true );
150 } // for
151} // distInl
152
153void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
154 // distribute qualifiers across all non-variable declarations in a distribution statemement
155 for ( DeclarationNode * iter = declaration ; iter != nullptr ; iter = iter->next ) {
156 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
157 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
158 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
159 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
160 DeclarationNode * clone = qualifiers->clone();
161 if ( qualifiers->type ) { // forall clause ? (handles SC)
162 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
163 swap( clone->type->forall, iter->type->aggregate.params );
164 iter->addQualifiers( clone );
165 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
166 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
167 DeclarationNode newnode;
168 swap( newnode.type, iter->type->aggInst.aggregate );
169 swap( clone->type->forall, newnode.type->aggregate.params );
170 newnode.addQualifiers( clone );
171 swap( newnode.type, iter->type->aggInst.aggregate );
172 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
173 swap( clone->type->forall, iter->type->forall );
174 iter->addQualifiers( clone );
175 } // if
176 } else { // just SC qualifiers
177 iter->addQualifiers( clone );
178 } // if
179 } // for
180 delete qualifiers;
181} // distQual
182
183// There is an ambiguity for inline generic-routine return-types and generic routines.
184// forall( otype T ) struct S { int i; } bar( T ) {}
185// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
186// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
187// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
188// forall( otype T ) struct S { int T; };
189// forall( otype W ) bar( W ) {}
190
191void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
192 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
193 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
194 declSpec->type->aggregate.params = nullptr;
195 } // if
196} // rebindForall
197
198string * build_postfix_name( string * name ) {
199 *name = string("__postfix_func_") + *name;
200 return name;
201} // build_postfix_name
202
203DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
204 if ( ! fieldList ) { // field declarator ?
205 if ( ! ( typeSpec->type && (typeSpec->type->kind == TypeData::Aggregate || typeSpec->type->kind == TypeData::Enum) ) ) {
206 stringstream ss;
207 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
208 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
209 return nullptr;
210 } // if
211 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
212 fieldList = DeclarationNode::newName( nullptr );
213 } // if
214
215 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
216 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
217 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
218 return temp;
219} // fieldDecl
220
221#define NEW_ZERO new ExpressionNode( build_constantInteger( yylloc, *new string( "0" ) ) )
222#define NEW_ONE new ExpressionNode( build_constantInteger( yylloc, *new string( "1" ) ) )
223#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
224#define MISSING_ANON_FIELD "syntax error, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
225#define MISSING_LOW "syntax error, missing low value for up-to range so index is uninitialized."
226#define MISSING_HIGH "syntax error, missing high value for down-to range so index is uninitialized."
227
228static ForCtrl * makeForCtrl(
229 const CodeLocation & location,
230 DeclarationNode * init,
231 enum OperKinds compop,
232 ExpressionNode * comp,
233 ExpressionNode * inc ) {
234 // Wrap both comp/inc if they are non-null.
235 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
236 compop,
237 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
238 comp ) );
239 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
240 // choose += or -= for upto/downto
241 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
242 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
243 inc ) );
244 // The StatementNode call frees init->name, it must happen later.
245 return new ForCtrl( new StatementNode( init ), comp, inc );
246}
247
248ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
249 if ( index->initializer ) {
250 SemanticError( yylloc, "syntax error, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
251 } // if
252 if ( index->next ) {
253 SemanticError( yylloc, "syntax error, multiple loop indexes disallowed in for-loop declaration." );
254 } // if
255 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
256 return makeForCtrl( location, initDecl, compop, comp, inc );
257} // forCtrl
258
259ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
260 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
261 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
262 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicType::SignedInt ) ) );
263 } // if
264 DeclarationNode * initDecl = distAttr(
265 DeclarationNode::newTypeof( type, true ),
266 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
267 );
268 return makeForCtrl( location, initDecl, compop, comp, inc );
269} // forCtrl
270
271ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
272 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
273 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
274 } else if ( auto commaExpr = dynamic_cast<ast::CommaExpr *>( index->expr.get() ) ) {
275 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
276 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
277 } else {
278 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
279 } // if
280 } else {
281 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
282 } // if
283} // forCtrl
284
285static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
286 SemanticError( yylloc, "syntax error, adjacent identifiers \"%s\" and \"%s\" are not meaningful in an %s.\n"
287 "Possible cause is misspelled type name or missing generic parameter.",
288 identifier1.c_str(), identifier2.c_str(), kind );
289} // IdentifierBeforeIdentifier
290
291static void IdentifierBeforeType( string & identifier, const char * kind ) {
292 SemanticError( yylloc, "syntax error, identifier \"%s\" cannot appear before a %s.\n"
293 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter.",
294 identifier.c_str(), kind );
295} // IdentifierBeforeType
296
297bool forall = false; // aggregate have one or more forall qualifiers ?
298
299// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
300#define YYLLOC_DEFAULT(Cur, Rhs, N) \
301if ( N ) { \
302 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
303 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
304 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
305 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
306 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
307} else { \
308 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
309 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
310 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
311}
312%}
313
314%define parse.error verbose
315
316// Types declaration for productions
317
318%union {
319 // A raw token can be used.
320 Token tok;
321
322 // The general node types hold some generic node or list of nodes.
323 DeclarationNode * decl;
324 InitializerNode * init;
325 ExpressionNode * expr;
326 StatementNode * stmt;
327 ClauseNode * clause;
328 TypeData * type;
329
330 // Special "nodes" containing compound information.
331 CondCtl * ifctl;
332 ForCtrl * forctl;
333 LabelNode * labels;
334
335 // Various flags and single values that become fields later.
336 ast::AggregateDecl::Aggregate aggKey;
337 ast::TypeDecl::Kind tclass;
338 OperKinds oper;
339 bool is_volatile;
340 EnumHiding enum_hiding;
341 ast::ExceptionKind except_kind;
342 // String passes ownership with it.
343 std::string * str;
344
345 // Narrower node types are used to avoid constant unwrapping.
346 ast::WaitForStmt * wfs;
347 ast::WaitUntilStmt::ClauseNode * wucn;
348 ast::GenericExpr * genexpr;
349}
350
351// ************************ TERMINAL TOKENS ********************************
352
353// keywords
354%token TYPEDEF
355%token EXTERN STATIC AUTO REGISTER
356%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
357%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
358%token NORETURN // C11
359%token CONST VOLATILE
360%token RESTRICT // C99
361%token ATOMIC // C11
362%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
363%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
364%token BOOL COMPLEX IMAGINARY // C99
365%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
366%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
367%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
368%token ZERO_T ONE_T // CFA
369%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE // GCC
370%token OFFSETOF BASETYPEOF TYPEID // CFA
371%token ENUM STRUCT UNION
372%token EXCEPTION // CFA
373%token GENERATOR COROUTINE MONITOR THREAD // CFA
374%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
375// %token RESUME // CFA
376%token LABEL // GCC
377%token SUSPEND // CFA
378%token ATTRIBUTE EXTENSION // GCC
379%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
380%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
381%token CORUN COFOR
382%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
383%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
384%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
385
386// names and constants: lexer differentiates between identifier and typedef names
387%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
388%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
389%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
390%token<tok> DIRECTIVE
391// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
392// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
393// converted into the tuple index (.)(1). e.g., 3.x
394%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
395
396// multi-character operators
397%token ARROW // ->
398%token ICR DECR // ++ --
399%token LS RS // << >>
400%token LE GE EQ NE // <= >= == !=
401%token ANDAND OROR // && ||
402%token ATTR ELLIPSIS // @@ ...
403
404%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
405%token PLUSassign MINUSassign // += -=
406%token LSassign RSassign // <<= >>=
407%token ANDassign ERassign ORassign // &= ^= |=
408
409%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
410%token ATassign // @=
411
412%type<tok> identifier identifier_at identifier_or_type_name attr_name
413%type<tok> quasi_keyword
414%type<expr> string_literal
415%type<str> string_literal_list
416
417%type<enum_hiding> hide_opt visible_hide_opt
418
419// expressions
420%type<expr> constant
421%type<expr> tuple tuple_expression_list
422%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
423%type<expr> primary_expression postfix_expression unary_expression
424%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
425%type<expr> shift_expression relational_expression equality_expression
426%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
427%type<expr> logical_AND_expression logical_OR_expression
428%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
429%type<expr> comma_expression comma_expression_opt
430%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
431%type<ifctl> conditional_declaration
432%type<forctl> for_control_expression for_control_expression_list
433%type<oper> upupeq updown updowneq downupdowneq
434%type<expr> subrange
435%type<decl> asm_name_opt
436%type<expr> asm_operands_opt asm_operands_list asm_operand
437%type<labels> label_list
438%type<expr> asm_clobbers_list_opt
439%type<is_volatile> asm_volatile_opt
440%type<expr> handler_predicate_opt
441%type<genexpr> generic_association generic_assoc_list
442
443// statements
444%type<stmt> statement labeled_statement compound_statement
445%type<stmt> statement_decl statement_decl_list statement_list_nodecl
446%type<stmt> selection_statement
447%type<clause> switch_clause_list_opt switch_clause_list
448%type<expr> case_value
449%type<clause> case_clause case_value_list case_label case_label_list
450%type<stmt> iteration_statement jump_statement
451%type<stmt> expression_statement asm_statement
452%type<stmt> with_statement
453%type<expr> with_clause_opt
454%type<stmt> corun_statement cofor_statement
455%type<stmt> exception_statement
456%type<clause> handler_clause finally_clause
457%type<except_kind> handler_key
458%type<stmt> mutex_statement
459%type<expr> when_clause when_clause_opt waitfor waituntil timeout
460%type<stmt> waitfor_statement waituntil_statement
461%type<wfs> wor_waitfor_clause
462%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
463
464// declarations
465%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
466%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
467%type<decl> abstract_parameter_declaration
468
469%type<aggKey> aggregate_key aggregate_data aggregate_control
470%type<decl> aggregate_type aggregate_type_nobody
471
472%type<decl> assertion assertion_list assertion_list_opt
473
474%type<expr> bit_subrange_size_opt bit_subrange_size
475
476%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
477%type<type> basic_type_name_type
478%type<type> vtable vtable_opt default_opt
479
480%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
481
482%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
483%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
484
485%type<decl> elaborated_type elaborated_type_nobody
486
487%type<decl> enumerator_list enum_type enum_type_nobody
488%type<init> enumerator_value_opt
489
490%type<decl> external_definition external_definition_list external_definition_list_opt
491
492%type<decl> exception_declaration
493
494%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
495%type<expr> field field_name_list field_name fraction_constants_opt
496
497%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
498
499%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
500%type<decl> identifier_list
501
502%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
503%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
504%type<decl> cfa_abstract_ptr cfa_abstract_tuple
505
506%type<decl> cfa_array_parameter_1st_dimension
507
508%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
509%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
510
511%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
512%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
513
514%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_list_ellipsis_opt
515
516%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
517
518%type<decl> c_declaration static_assert
519%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
520%type<decl> KR_parameter_list KR_parameter_list_opt
521
522%type<decl> parameter_declaration parameter_list parameter_list_ellipsis_opt
523
524%type<decl> paren_identifier paren_type
525
526%type<decl> storage_class storage_class_list
527
528%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
529
530%type<tclass> type_class new_type_class
531%type<decl> type_declarator type_declarator_name type_declaring_list
532
533%type<decl> type_declaration_specifier type_type_specifier
534%type<type> type_name typegen_name
535%type<decl> typedef_name typedef_declaration typedef_expression
536
537%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
538%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
539
540%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
541
542%type<decl> type type_no_function
543%type<decl> type_parameter type_parameter_list type_initializer_opt
544
545%type<expr> type_parameters_opt type_list array_type_list // array_dimension_list
546
547%type<decl> type_qualifier forall type_qualifier_list_opt type_qualifier_list
548%type<type> type_qualifier_name
549%type<decl> type_specifier type_specifier_nobody
550
551%type<decl> variable_declarator variable_ptr variable_array variable_function
552%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
553
554%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
555
556// initializers
557%type<init> initializer initializer_list_opt initializer_opt
558
559// designators
560%type<expr> designator designator_list designation
561
562
563// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
564// .---------. matches IF '(' comma_expression ')' statement . (reduce)
565// if ( C ) S1 else S2
566// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
567// Similar issues exit with the waitfor statement.
568
569// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
570// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
571%precedence THEN // rule precedence for IF/WAITFOR statement
572%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
573%precedence WAND // token precedence for start of WAND in WAITFOR statement
574%precedence OROR // token precedence for start of WOR in WAITFOR statement
575%precedence WOR // token precedence for start of WOR in WAITFOR statement
576%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
577%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
578%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
579%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
580%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
581%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
582%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
583
584
585// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
586// forall( otype T ) struct Foo { T v; };
587// .-----. matches pointer to function returning a generic (which is impossible without a type)
588// Foo ( *fp )( int );
589// `---' matches start of TYPEGENname '('
590// must be:
591// Foo( int ) ( *fp )( int );
592// The same problem occurs here:
593// forall( otype T ) struct Foo { T v; } ( *fp )( int );
594// must be:
595// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
596
597// Order of these lines matters (low-to-high precedence).
598%precedence TYPEGENname
599%precedence '}'
600%precedence '('
601
602// %precedence RESUME
603// %precedence '{'
604// %precedence ')'
605
606%locations // support location tracking for error messages
607
608%start translation_unit // parse-tree root
609
610%%
611// ************************ Namespace Management ********************************
612
613// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
614// which are lexically identical.
615//
616// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
617// foo f; // to allow it to appear in this context
618//
619// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
620// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
621// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
622// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
623// must be distinguished by the lexical scanner.
624//
625// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
626// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
627// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
628// each context that introduces a name scope, a new level is created in the type table and that level is popped on
629// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
630// This requires distinguishing between type names that are local to the current declaration scope and those that
631// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
632//
633// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
634// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
635// around the list separator.
636//
637// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
638// push pop push pop
639
640push:
641 { typedefTable.enterScope(); }
642 ;
643
644pop:
645 { typedefTable.leaveScope(); }
646 ;
647
648// ************************ CONSTANTS ********************************
649
650constant:
651 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
652 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
653 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
654 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
655 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
656 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
657 ;
658
659quasi_keyword: // CFA
660 TIMEOUT
661 | WAND
662 | WOR
663 | CATCH
664 | RECOVER
665 | CATCHRESUME
666 | FIXUP
667 | FINALLY
668 ;
669
670identifier:
671 IDENTIFIER
672 | quasi_keyword
673 ;
674
675identifier_at:
676 identifier
677 | '@' // CFA
678 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
679 ;
680
681string_literal:
682 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
683 ;
684
685string_literal_list: // juxtaposed strings are concatenated
686 STRINGliteral { $$ = $1; } // conversion from tok to str
687 | string_literal_list STRINGliteral
688 {
689 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
690 delete $2; // allocated by lexer
691 $$ = $1; // conversion from tok to str
692 }
693 ;
694
695// ************************ EXPRESSIONS ********************************
696
697primary_expression:
698 IDENTIFIER // typedef name cannot be used as a variable name
699 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
700 | quasi_keyword
701 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
702 | TYPEDIMname // CFA, generic length argument
703 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
704 | tuple
705 | '(' comma_expression ')'
706 { $$ = $2; }
707 | '(' compound_statement ')' // GCC, lambda expression
708 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
709 | type_name '.' identifier // CFA, nested type
710 { $$ = new ExpressionNode( build_qualified_expr( yylloc, DeclarationNode::newFromTypeData( $1 ), build_varref( yylloc, $3 ) ) ); }
711 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
712 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
713 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
714 {
715 // add the missing control expression to the GenericExpr and return it
716 $5->control = maybeMoveBuild( $3 );
717 $$ = new ExpressionNode( $5 );
718 }
719 // | RESUME '(' comma_expression ')'
720 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
721 // | RESUME '(' comma_expression ')' compound_statement
722 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
723 | IDENTIFIER IDENTIFIER // invalid syntax rule
724 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "expression" ); $$ = nullptr; }
725 | IDENTIFIER type_qualifier // invalid syntax rule
726 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
727 | IDENTIFIER storage_class // invalid syntax rule
728 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
729 | IDENTIFIER basic_type_name // invalid syntax rule
730 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
731 | IDENTIFIER TYPEDEFname // invalid syntax rule
732 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
733 | IDENTIFIER TYPEGENname // invalid syntax rule
734 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
735 ;
736
737generic_assoc_list: // C11
738 generic_association
739 | generic_assoc_list ',' generic_association
740 {
741 // steal the association node from the singleton and delete the wrapper
742 assert( 1 == $3->associations.size() );
743 $1->associations.push_back( $3->associations.front() );
744 delete $3;
745 $$ = $1;
746 }
747 ;
748
749generic_association: // C11
750 type_no_function ':' assignment_expression
751 {
752 // create a GenericExpr wrapper with one association pair
753 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
754 }
755 | DEFAULT ':' assignment_expression
756 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
757 ;
758
759postfix_expression:
760 primary_expression
761 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
762 // Historic, transitional: Disallow commas in subscripts.
763 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
764 // Current: Commas in subscripts make tuples.
765 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)($3->set_last( $5 ) ) )) ) ); }
766 | postfix_expression '[' assignment_expression ']'
767 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
768 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
769 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
770 // equivalent to the old x[i,j].
771 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
772 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
773 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
774 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
775 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
776 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
777 {
778 Token fn;
779 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
780 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
781 }
782 | postfix_expression '(' argument_expression_list_opt ')'
783 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
784 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
785 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
786 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg") ) ),
787 (ExpressionNode *)($3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) )) ) ); }
788 | postfix_expression '`' identifier // CFA, postfix call
789 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
790 | constant '`' identifier // CFA, postfix call
791 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
792 | string_literal '`' identifier // CFA, postfix call
793 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
794
795 // SKULLDUGGERY: The typedef table used for parsing does not store fields in structures. To parse a qualified
796 // name, it is assumed all name-tokens after the first are identifiers, regardless of how the lexer identifies
797 // them. For example:
798 //
799 // struct S;
800 // forall(T) struct T;
801 // union U;
802 // enum E { S, T, E };
803 // struct Z { int S, T, Z, E, U; };
804 // void fred () {
805 // Z z;
806 // z.S; // lexer returns S is TYPEDEFname
807 // z.T; // lexer returns T is TYPEGENname
808 // z.Z; // lexer returns Z is TYPEDEFname
809 // z.U; // lexer returns U is TYPEDEFname
810 // z.E; // lexer returns E is TYPEDEFname
811 // }
812 | postfix_expression '.' identifier
813 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
814 | postfix_expression '.' TYPEDEFname // CFA, SKULLDUGGERY
815 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
816 | postfix_expression '.' TYPEGENname // CFA, SKULLDUGGERY
817 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
818
819 | postfix_expression '.' INTEGERconstant // CFA, tuple index
820 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
821 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
822 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
823 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
824 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
825 | postfix_expression '.' aggregate_control
826 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
827 | postfix_expression ARROW identifier
828 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
829 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
830 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
831 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
832 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
833 | postfix_expression ICR
834 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
835 | postfix_expression DECR
836 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
837 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
838 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
839 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
840 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
841 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
842 {
843 Token fn;
844 fn.str = new string( "^?{}" ); // location undefined
845 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
846 }
847 ;
848
849argument_expression_list_opt:
850 // empty
851 { $$ = nullptr; }
852 | argument_expression_list
853 ;
854
855argument_expression_list:
856 argument_expression
857 | argument_expression_list_opt ',' argument_expression
858 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
859 ;
860
861argument_expression:
862 '@' // CFA, default parameter
863 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
864 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
865 | assignment_expression
866 ;
867
868field_name_list: // CFA, tuple field selector
869 field
870 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
871 ;
872
873field: // CFA, tuple field selector
874 field_name
875 | FLOATING_DECIMALconstant field
876 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
877 | FLOATING_DECIMALconstant '[' field_name_list ']'
878 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
879 | field_name '.' field
880 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
881 | field_name '.' '[' field_name_list ']'
882 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
883 | field_name ARROW field
884 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
885 | field_name ARROW '[' field_name_list ']'
886 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
887 ;
888
889field_name:
890 INTEGERconstant fraction_constants_opt
891 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
892 | FLOATINGconstant fraction_constants_opt
893 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
894 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
895 {
896 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
897 }
898 ;
899
900fraction_constants_opt:
901 // empty
902 { $$ = nullptr; }
903 | fraction_constants_opt FLOATING_FRACTIONconstant
904 {
905 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
906 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
907 }
908 ;
909
910unary_expression:
911 postfix_expression
912 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
913 // semantics checks, e.g., ++3, 3--, *3, &&3
914 | constant
915 | string_literal
916 { $$ = $1; }
917 | EXTENSION cast_expression // GCC
918 { $$ = $2->set_extension( true ); }
919 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
920 // { * X; } // dereference X
921 // { * int X; } // CFA declaration of pointer to int
922 | ptrref_operator cast_expression // CFA
923 {
924 switch ( $1 ) {
925 case OperKinds::AddressOf:
926 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
927 break;
928 case OperKinds::PointTo:
929 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
930 break;
931 case OperKinds::And:
932 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
933 break;
934 default:
935 assert( false );
936 }
937 }
938 | unary_operator cast_expression
939 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
940 | ICR unary_expression
941 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
942 | DECR unary_expression
943 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
944 | SIZEOF unary_expression
945 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
946 | SIZEOF '(' type_no_function ')'
947 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
948 | ALIGNOF unary_expression // GCC, variable alignment
949 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
950 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
951 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
952
953 // Cannot use rule "type", which includes cfa_abstract_function, for sizeof/alignof, because of S/R problems on
954 // look ahead, so the cfa_abstract_function is factored out.
955 | SIZEOF '(' cfa_abstract_function ')'
956 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
957 | ALIGNOF '(' cfa_abstract_function ')' // GCC, type alignment
958 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
959
960 | OFFSETOF '(' type_no_function ',' identifier ')'
961 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
962 | TYPEID '(' type ')'
963 {
964 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
965 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
966 }
967 ;
968
969ptrref_operator:
970 '*' { $$ = OperKinds::PointTo; }
971 | '&' { $$ = OperKinds::AddressOf; }
972 // GCC, address of label must be handled by semantic check for ref,ref,label
973 | ANDAND { $$ = OperKinds::And; }
974 ;
975
976unary_operator:
977 '+' { $$ = OperKinds::UnPlus; }
978 | '-' { $$ = OperKinds::UnMinus; }
979 | '!' { $$ = OperKinds::Neg; }
980 | '~' { $$ = OperKinds::BitNeg; }
981 ;
982
983cast_expression:
984 unary_expression
985 | '(' type_no_function ')' cast_expression
986 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
987 | '(' aggregate_control '&' ')' cast_expression // CFA
988 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
989 | '(' aggregate_control '*' ')' cast_expression // CFA
990 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
991 | '(' VIRTUAL ')' cast_expression // CFA
992 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), nullptr ) ); }
993 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
994 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
995 | '(' RETURN type_no_function ')' cast_expression // CFA
996 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
997 | '(' COERCE type_no_function ')' cast_expression // CFA
998 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
999 | '(' qualifier_cast_list ')' cast_expression // CFA
1000 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
1001// | '(' type_no_function ')' tuple
1002// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
1003 ;
1004
1005qualifier_cast_list:
1006 cast_modifier type_qualifier_name
1007 | cast_modifier MUTEX
1008 | qualifier_cast_list cast_modifier type_qualifier_name
1009 | qualifier_cast_list cast_modifier MUTEX
1010 ;
1011
1012cast_modifier:
1013 '-'
1014 | '+'
1015 ;
1016
1017exponential_expression:
1018 cast_expression
1019 | exponential_expression '\\' cast_expression
1020 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
1021 ;
1022
1023multiplicative_expression:
1024 exponential_expression
1025 | multiplicative_expression '*' exponential_expression
1026 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
1027 | multiplicative_expression '/' exponential_expression
1028 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
1029 | multiplicative_expression '%' exponential_expression
1030 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
1031 ;
1032
1033additive_expression:
1034 multiplicative_expression
1035 | additive_expression '+' multiplicative_expression
1036 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
1037 | additive_expression '-' multiplicative_expression
1038 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
1039 ;
1040
1041shift_expression:
1042 additive_expression
1043 | shift_expression LS additive_expression
1044 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
1045 | shift_expression RS additive_expression
1046 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
1047 ;
1048
1049relational_expression:
1050 shift_expression
1051 | relational_expression '<' shift_expression
1052 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
1053 | relational_expression '>' shift_expression
1054 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
1055 | relational_expression LE shift_expression
1056 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
1057 | relational_expression GE shift_expression
1058 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
1059 ;
1060
1061equality_expression:
1062 relational_expression
1063 | equality_expression EQ relational_expression
1064 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1065 | equality_expression NE relational_expression
1066 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1067 ;
1068
1069AND_expression:
1070 equality_expression
1071 | AND_expression '&' equality_expression
1072 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1073 ;
1074
1075exclusive_OR_expression:
1076 AND_expression
1077 | exclusive_OR_expression '^' AND_expression
1078 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1079 ;
1080
1081inclusive_OR_expression:
1082 exclusive_OR_expression
1083 | inclusive_OR_expression '|' exclusive_OR_expression
1084 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1085 ;
1086
1087logical_AND_expression:
1088 inclusive_OR_expression
1089 | logical_AND_expression ANDAND inclusive_OR_expression
1090 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1091 ;
1092
1093logical_OR_expression:
1094 logical_AND_expression
1095 | logical_OR_expression OROR logical_AND_expression
1096 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1097 ;
1098
1099conditional_expression:
1100 logical_OR_expression
1101 | logical_OR_expression '?' comma_expression ':' conditional_expression
1102 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1103 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1104 { $$ = new ExpressionNode( build_cond( yylloc, $1, nullptr, $4 ) ); }
1105 ;
1106
1107constant_expression:
1108 conditional_expression
1109 ;
1110
1111assignment_expression:
1112 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1113 conditional_expression
1114 | unary_expression assignment_operator assignment_expression
1115 {
1116// if ( $2 == OperKinds::AtAssn ) {
1117// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1118// } else {
1119 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1120// } // if
1121 }
1122 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1123 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1124 ;
1125
1126assignment_expression_opt:
1127 // empty
1128 { $$ = nullptr; }
1129 | assignment_expression
1130 ;
1131
1132assignment_operator:
1133 simple_assignment_operator
1134 | compound_assignment_operator
1135 ;
1136
1137simple_assignment_operator:
1138 '=' { $$ = OperKinds::Assign; }
1139 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1140 ;
1141
1142compound_assignment_operator:
1143 EXPassign { $$ = OperKinds::ExpAssn; }
1144 | MULTassign { $$ = OperKinds::MulAssn; }
1145 | DIVassign { $$ = OperKinds::DivAssn; }
1146 | MODassign { $$ = OperKinds::ModAssn; }
1147 | PLUSassign { $$ = OperKinds::PlusAssn; }
1148 | MINUSassign { $$ = OperKinds::MinusAssn; }
1149 | LSassign { $$ = OperKinds::LSAssn; }
1150 | RSassign { $$ = OperKinds::RSAssn; }
1151 | ANDassign { $$ = OperKinds::AndAssn; }
1152 | ERassign { $$ = OperKinds::ERAssn; }
1153 | ORassign { $$ = OperKinds::OrAssn; }
1154 ;
1155
1156tuple: // CFA, tuple
1157 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1158 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1159// '[' ']'
1160// { $$ = new ExpressionNode( build_tuple() ); }
1161// | '[' push assignment_expression pop ']'
1162// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1163 '[' ',' tuple_expression_list ']'
1164 { $$ = new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
1165 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1166 { $$ = new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)($3->set_last( $6 ) ) )); }
1167 ;
1168
1169tuple_expression_list:
1170 assignment_expression
1171 | '@' // CFA
1172 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1173 | tuple_expression_list ',' assignment_expression
1174 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1175 | tuple_expression_list ',' '@'
1176 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1177 ;
1178
1179comma_expression:
1180 assignment_expression
1181 | comma_expression ',' assignment_expression
1182 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1183 ;
1184
1185comma_expression_opt:
1186 // empty
1187 { $$ = nullptr; }
1188 | comma_expression
1189 ;
1190
1191// ************************** STATEMENTS *******************************
1192
1193statement:
1194 labeled_statement
1195 | compound_statement
1196 | expression_statement
1197 | selection_statement
1198 | iteration_statement
1199 | jump_statement
1200 | with_statement
1201 | mutex_statement
1202 | waitfor_statement
1203 | waituntil_statement
1204 | corun_statement
1205 | cofor_statement
1206 | exception_statement
1207 | enable_disable_statement
1208 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1209 | asm_statement
1210 | DIRECTIVE
1211 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1212 ;
1213
1214labeled_statement:
1215 // labels cannot be identifiers 0 or 1
1216 identifier_or_type_name ':' attribute_list_opt statement
1217 { $$ = $4->add_label( yylloc, $1, $3 ); }
1218 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1219 {
1220 SemanticError( yylloc, "syntx error, label \"%s\" must be associated with a statement, "
1221 "where a declaration, case, or default is not a statement.\n"
1222 "Move the label or terminate with a semicolon.", $1.str->c_str() );
1223 $$ = nullptr;
1224 }
1225 ;
1226
1227compound_statement:
1228 '{' '}'
1229 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1230 | '{' push
1231 local_label_declaration_opt // GCC, local labels appear at start of block
1232 statement_decl_list // C99, intermix declarations and statements
1233 pop '}'
1234 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1235 ;
1236
1237statement_decl_list: // C99
1238 statement_decl
1239 | statement_decl_list statement_decl
1240 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1241 ;
1242
1243statement_decl:
1244 declaration // CFA, new & old style declarations
1245 { $$ = new StatementNode( $1 ); }
1246 | EXTENSION declaration // GCC
1247 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1248 | function_definition
1249 { $$ = new StatementNode( $1 ); }
1250 | EXTENSION function_definition // GCC
1251 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1252 | statement
1253 ;
1254
1255statement_list_nodecl:
1256 statement
1257 | statement_list_nodecl statement
1258 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1259 | statement_list_nodecl error // invalid syntax rule
1260 { SemanticError( yylloc, "syntax error, declarations only allowed at the start of the switch body,"
1261 " i.e., after the '{'." ); $$ = nullptr; }
1262 ;
1263
1264expression_statement:
1265 comma_expression_opt ';'
1266 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1267 ;
1268
1269// "if", "switch", and "choose" require parenthesis around the conditional. See the following ambiguities without
1270// parenthesis:
1271//
1272// if x + y + z; => "if ( x + y ) + z" or "if ( x ) + y + z"
1273//
1274// switch O { }
1275//
1276// O{} => object-constructor for conditional, switch body ???
1277// O{} => O for conditional followed by switch body
1278//
1279// C++ has this problem, as it has the same constructor syntax.
1280//
1281// switch sizeof ( T ) { }
1282//
1283// sizeof ( T ) => sizeof of T for conditional followed by switch body
1284// sizeof ( T ) => sizeof of compound literal (T){ }, closing parenthesis ???
1285//
1286// Note the two grammar rules for sizeof (alignof)
1287//
1288// | SIZEOF unary_expression
1289// | SIZEOF '(' type_no_function ')'
1290//
1291// where the first DOES NOT require parenthesis! And C++ inherits this problem from C.
1292
1293selection_statement:
1294 IF '(' conditional_declaration ')' statement %prec THEN
1295 // explicitly deal with the shift/reduce conflict on if/else
1296 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1297 | IF '(' conditional_declaration ')' statement ELSE statement
1298 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1299 | SWITCH '(' comma_expression ')' case_clause
1300 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1301 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1302 {
1303 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1304 // The semantics of the declaration list is changed to include associated initialization, which is performed
1305 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1306 // statement around the switch. Statements after the initial declaration list can never be executed, and
1307 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1308 // statement.
1309 $$ = $7 ? new StatementNode( build_compound( yylloc, (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1310 }
1311 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1312 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1313 | CHOOSE '(' comma_expression ')' case_clause // CFA
1314 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1315 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1316 {
1317 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1318 $$ = $7 ? new StatementNode( build_compound( yylloc, (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1319 }
1320 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1321 { SemanticError( yylloc, "syntax error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1322 ;
1323
1324conditional_declaration:
1325 comma_expression
1326 { $$ = new CondCtl( nullptr, $1 ); }
1327 | c_declaration // no semi-colon
1328 { $$ = new CondCtl( $1, nullptr ); }
1329 | cfa_declaration // no semi-colon
1330 { $$ = new CondCtl( $1, nullptr ); }
1331 | declaration comma_expression // semi-colon separated
1332 { $$ = new CondCtl( $1, $2 ); }
1333 ;
1334
1335// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1336// clause allows a list of values and subranges.
1337
1338case_value: // CFA
1339 constant_expression { $$ = $1; }
1340 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1341 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1342 | subrange // CFA, subrange
1343 ;
1344
1345case_value_list: // CFA
1346 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1347 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1348 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1349 ;
1350
1351case_label: // CFA
1352 CASE error // invalid syntax rule
1353 { SemanticError( yylloc, "syntax error, case list missing after case." ); $$ = nullptr; }
1354 | CASE case_value_list ':' { $$ = $2; }
1355 | CASE case_value_list error // invalid syntax rule
1356 { SemanticError( yylloc, "syntax error, colon missing after case list." ); $$ = nullptr; }
1357 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1358 // A semantic check is required to ensure only one default clause per switch/choose statement.
1359 | DEFAULT error // invalid syntax rule
1360 { SemanticError( yylloc, "syntax error, colon missing after default." ); $$ = nullptr; }
1361 ;
1362
1363case_label_list: // CFA
1364 case_label
1365 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1366 ;
1367
1368case_clause: // CFA
1369 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1370 ;
1371
1372switch_clause_list_opt: // CFA
1373 // empty
1374 { $$ = nullptr; }
1375 | switch_clause_list
1376 ;
1377
1378switch_clause_list: // CFA
1379 case_label_list statement_list_nodecl
1380 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1381 | switch_clause_list case_label_list statement_list_nodecl
1382 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1383 ;
1384
1385iteration_statement:
1386 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1387 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1388 | WHILE '(' ')' statement ELSE statement // CFA
1389 {
1390 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1391 SemanticWarning( yylloc, Warning::SuperfluousElse );
1392 }
1393 | WHILE '(' conditional_declaration ')' statement %prec THEN
1394 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1395 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1396 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1397 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1398 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1399 | DO statement WHILE '(' ')' ELSE statement // CFA
1400 {
1401 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1402 SemanticWarning( yylloc, Warning::SuperfluousElse );
1403 }
1404 | DO statement WHILE '(' comma_expression ')' ';'
1405 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1406 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1407 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1408 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1409 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1410 | FOR '(' ')' statement ELSE statement // CFA
1411 {
1412 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1413 SemanticWarning( yylloc, Warning::SuperfluousElse );
1414 }
1415 | FOR '(' for_control_expression_list ')' statement %prec THEN
1416 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1417 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1418 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1419 ;
1420
1421for_control_expression_list:
1422 for_control_expression
1423 | for_control_expression_list ':' for_control_expression
1424 // ForCtrl + ForCtrl:
1425 // init + init => multiple declaration statements that are hoisted
1426 // condition + condition => (expression) && (expression)
1427 // change + change => (expression), (expression)
1428 {
1429 $1->init->set_last( $3->init );
1430 if ( $1->condition ) {
1431 if ( $3->condition ) {
1432 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1433 } // if
1434 } else $1->condition = $3->condition;
1435 if ( $1->change ) {
1436 if ( $3->change ) {
1437 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1438 } // if
1439 } else $1->change = $3->change;
1440 $$ = $1;
1441 }
1442 ;
1443
1444for_control_expression:
1445 ';' comma_expression_opt ';' comma_expression_opt
1446 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1447 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1448 {
1449 StatementNode * init = $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr;
1450 $$ = new ForCtrl( init, $3, $5 );
1451 }
1452 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1453 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1454
1455 | '@' ';' comma_expression // CFA, empty loop-index
1456 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1457 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1458 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1459
1460 | comma_expression // CFA, anonymous loop-index
1461 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1462 | downupdowneq comma_expression // CFA, anonymous loop-index
1463 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1464
1465 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1466 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1467 | '@' updowneq comma_expression // CFA, anonymous loop-index
1468 {
1469 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1470 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1471 }
1472 | comma_expression updowneq '@' // CFA, anonymous loop-index
1473 {
1474 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1475 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1476 }
1477 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1478 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1479 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1480 {
1481 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1482 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1483 }
1484 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1485 {
1486 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1487 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1488 }
1489 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1490 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1491 | '@' updowneq '@' // CFA, invalid syntax rule
1492 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1493 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1494 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1495 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1496 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1497 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1498 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1499
1500 | comma_expression ';' comma_expression // CFA
1501 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1502 | comma_expression ';' downupdowneq comma_expression // CFA
1503 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1504
1505 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1506 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1507 | comma_expression ';' '@' updowneq comma_expression // CFA
1508 {
1509 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1510 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1511 }
1512 | comma_expression ';' comma_expression updowneq '@' // CFA
1513 {
1514 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1515 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1516 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1517 }
1518 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1519 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1520
1521 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1522 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1523 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1524 {
1525 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1526 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1527 }
1528 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1529 {
1530 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1531 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1532 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1533 }
1534 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1535 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1536 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1537 {
1538 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1539 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1540 }
1541 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1542 {
1543 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1544 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1545 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1546 }
1547 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1548 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1549
1550 | declaration comma_expression // CFA
1551 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1552 | declaration downupdowneq comma_expression // CFA
1553 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1554
1555 | declaration comma_expression updowneq comma_expression // CFA
1556 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1557 | declaration '@' updowneq comma_expression // CFA
1558 {
1559 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1560 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1561 }
1562 | declaration comma_expression updowneq '@' // CFA
1563 {
1564 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1565 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1566 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1567 }
1568
1569 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1570 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1571 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1572 {
1573 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1574 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1575 }
1576 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1577 {
1578 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1579 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1580 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1581 }
1582 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1583 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1584 | declaration '@' updowneq comma_expression '~' '@' // CFA
1585 {
1586 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1587 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, nullptr );
1588 }
1589 | declaration comma_expression updowneq '@' '~' '@' // CFA
1590 {
1591 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1592 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1593 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1594 }
1595 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1596 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1597
1598 | comma_expression ';' TYPEDEFname // CFA, array type
1599 {
1600 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1601 //$$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1602 }
1603 | comma_expression ';' downupdowneq TYPEDEFname // CFA, array type
1604 {
1605 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) {
1606 SemanticError( yylloc, "syntax error, all enumeration ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr;
1607 }
1608 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1609 }
1610 ;
1611
1612downupdowneq:
1613 ErangeDown
1614 { $$ = OperKinds::GThan; }
1615 | ErangeUpEq
1616 { $$ = OperKinds::LEThan; }
1617 | ErangeDownEq
1618 { $$ = OperKinds::GEThan; }
1619 ;
1620
1621updown:
1622 '~'
1623 { $$ = OperKinds::LThan; }
1624 | ErangeDown
1625 { $$ = OperKinds::GThan; }
1626 ;
1627
1628updowneq:
1629 updown
1630 | ErangeUpEq
1631 { $$ = OperKinds::LEThan; }
1632 | ErangeDownEq
1633 { $$ = OperKinds::GEThan; }
1634 ;
1635
1636jump_statement:
1637 GOTO identifier_or_type_name ';'
1638 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1639 | GOTO '*' comma_expression ';' // GCC, computed goto
1640 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1641 // whereas normal operator precedence yields goto (*i)+3;
1642 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1643 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1644 | fall_through_name ';' // CFA
1645 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1646 | fall_through_name identifier_or_type_name ';' // CFA
1647 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1648 | fall_through_name DEFAULT ';' // CFA
1649 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1650 | CONTINUE ';'
1651 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1652 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1653 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1654 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1655 // the target of the transfer appears only at the start of an iteration statement.
1656 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1657 | BREAK ';'
1658 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1659 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1660 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1661 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1662 // the target of the transfer appears only at the start of an iteration statement.
1663 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1664 | RETURN comma_expression_opt ';'
1665 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1666 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1667 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1668 | SUSPEND ';'
1669 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1670 | SUSPEND compound_statement
1671 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1672 | SUSPEND COROUTINE ';'
1673 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1674 | SUSPEND COROUTINE compound_statement
1675 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1676 | SUSPEND GENERATOR ';'
1677 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1678 | SUSPEND GENERATOR compound_statement
1679 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1680 | THROW assignment_expression_opt ';' // handles rethrow
1681 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1682 | THROWRESUME assignment_expression_opt ';' // handles reresume
1683 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1684 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1685 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1686 ;
1687
1688fall_through_name: // CFA
1689 FALLTHRU
1690 | FALLTHROUGH
1691 ;
1692
1693with_statement:
1694 WITH '(' tuple_expression_list ')' statement
1695 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1696 ;
1697
1698// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1699mutex_statement:
1700 MUTEX '(' argument_expression_list_opt ')' statement
1701 {
1702 if ( ! $3 ) { SemanticError( yylloc, "syntax error, mutex argument list cannot be empty." ); $$ = nullptr; }
1703 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1704 }
1705 ;
1706
1707when_clause:
1708 WHEN '(' comma_expression ')' { $$ = $3; }
1709 ;
1710
1711when_clause_opt:
1712 // empty
1713 { $$ = nullptr; }
1714 | when_clause
1715 ;
1716
1717cast_expression_list:
1718 cast_expression
1719 | cast_expression_list ',' cast_expression
1720 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1721 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1722 ;
1723
1724timeout:
1725 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1726 ;
1727
1728wor:
1729 OROR
1730 | WOR
1731
1732waitfor:
1733 WAITFOR '(' cast_expression ')'
1734 { $$ = $3; }
1735 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1736 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1737 ;
1738
1739wor_waitfor_clause:
1740 when_clause_opt waitfor statement %prec THEN
1741 // Called first: create header for WaitForStmt.
1742 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1743 | wor_waitfor_clause wor when_clause_opt waitfor statement
1744 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1745 | wor_waitfor_clause wor when_clause_opt ELSE statement
1746 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1747 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1748 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1749 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1750 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1751 { SemanticError( yylloc, "syntax error, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1752 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1753 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1754 ;
1755
1756waitfor_statement:
1757 wor_waitfor_clause %prec THEN
1758 { $$ = new StatementNode( $1 ); }
1759 ;
1760
1761wand:
1762 ANDAND
1763 | WAND
1764 ;
1765
1766waituntil:
1767 WAITUNTIL '(' comma_expression ')'
1768 { $$ = $3; }
1769 ;
1770
1771waituntil_clause:
1772 when_clause_opt waituntil statement
1773 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1774 | '(' wor_waituntil_clause ')'
1775 { $$ = $2; }
1776 ;
1777
1778wand_waituntil_clause:
1779 waituntil_clause %prec THEN
1780 { $$ = $1; }
1781 | waituntil_clause wand wand_waituntil_clause
1782 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1783 ;
1784
1785wor_waituntil_clause:
1786 wand_waituntil_clause
1787 { $$ = $1; }
1788 | wor_waituntil_clause wor wand_waituntil_clause
1789 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1790 | wor_waituntil_clause wor when_clause_opt ELSE statement
1791 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1792 ;
1793
1794waituntil_statement:
1795 wor_waituntil_clause %prec THEN
1796 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1797 ;
1798
1799corun_statement:
1800 CORUN statement
1801 { $$ = new StatementNode( build_corun( yylloc, $2 ) ); }
1802 ;
1803
1804cofor_statement:
1805 COFOR '(' for_control_expression_list ')' statement
1806 { $$ = new StatementNode( build_cofor( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1807 ;
1808
1809exception_statement:
1810 TRY compound_statement handler_clause %prec THEN
1811 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1812 | TRY compound_statement finally_clause
1813 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1814 | TRY compound_statement handler_clause finally_clause
1815 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1816 ;
1817
1818handler_clause:
1819 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1820 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1821 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1822 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1823 ;
1824
1825handler_predicate_opt:
1826 // empty
1827 { $$ = nullptr; }
1828 | ';' conditional_expression { $$ = $2; }
1829 ;
1830
1831handler_key:
1832 CATCH { $$ = ast::Terminate; }
1833 | RECOVER { $$ = ast::Terminate; }
1834 | CATCHRESUME { $$ = ast::Resume; }
1835 | FIXUP { $$ = ast::Resume; }
1836 ;
1837
1838finally_clause:
1839 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1840 ;
1841
1842exception_declaration:
1843 // No SUE declaration in parameter list.
1844 type_specifier_nobody
1845 | type_specifier_nobody declarator
1846 { $$ = $2->addType( $1 ); }
1847 | type_specifier_nobody variable_abstract_declarator
1848 { $$ = $2->addType( $1 ); }
1849 | cfa_abstract_declarator_tuple identifier // CFA
1850 { $$ = $1->addName( $2 ); }
1851 | cfa_abstract_declarator_tuple // CFA
1852 ;
1853
1854enable_disable_statement:
1855 enable_disable_key identifier_list compound_statement
1856 ;
1857
1858enable_disable_key:
1859 ENABLE
1860 | DISABLE
1861 ;
1862
1863asm_statement:
1864 ASM asm_volatile_opt '(' string_literal ')' ';'
1865 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1866 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1867 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1868 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1869 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1870 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1871 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1872 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1873 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1874 ;
1875
1876asm_volatile_opt: // GCC
1877 // empty
1878 { $$ = false; }
1879 | VOLATILE
1880 { $$ = true; }
1881 ;
1882
1883asm_operands_opt: // GCC
1884 // empty
1885 { $$ = nullptr; } // use default argument
1886 | asm_operands_list
1887 ;
1888
1889asm_operands_list: // GCC
1890 asm_operand
1891 | asm_operands_list ',' asm_operand
1892 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1893 ;
1894
1895asm_operand: // GCC
1896 string_literal '(' constant_expression ')'
1897 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1898 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1899 {
1900 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1901 delete $2.str;
1902 }
1903 ;
1904
1905asm_clobbers_list_opt: // GCC
1906 // empty
1907 { $$ = nullptr; } // use default argument
1908 | string_literal
1909 { $$ = $1; }
1910 | asm_clobbers_list_opt ',' string_literal
1911 { $$ = (ExpressionNode *)( $1->set_last( $3 ) ); }
1912 ;
1913
1914label_list:
1915 identifier
1916 {
1917 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1918 delete $1; // allocated by lexer
1919 }
1920 | label_list ',' identifier
1921 {
1922 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1923 delete $3; // allocated by lexer
1924 }
1925 ;
1926
1927// ****************************** DECLARATIONS *********************************
1928
1929declaration_list_opt: // used at beginning of switch statement
1930 // empty
1931 { $$ = nullptr; }
1932 | declaration_list
1933 ;
1934
1935declaration_list:
1936 declaration
1937 | declaration_list declaration
1938 { $$ = $1->set_last( $2 ); }
1939 ;
1940
1941KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1942 // empty
1943 { $$ = nullptr; }
1944 | KR_parameter_list
1945 ;
1946
1947KR_parameter_list:
1948 c_declaration ';'
1949 { $$ = $1; }
1950 | KR_parameter_list c_declaration ';'
1951 { $$ = $1->set_last( $2 ); }
1952 ;
1953
1954local_label_declaration_opt: // GCC, local label
1955 // empty
1956 | local_label_declaration_list
1957 ;
1958
1959local_label_declaration_list: // GCC, local label
1960 LABEL local_label_list ';'
1961 | local_label_declaration_list LABEL local_label_list ';'
1962 ;
1963
1964local_label_list: // GCC, local label
1965 identifier_or_type_name
1966 | local_label_list ',' identifier_or_type_name
1967 ;
1968
1969declaration: // old & new style declarations
1970 c_declaration ';'
1971 | cfa_declaration ';' // CFA
1972 | static_assert // C11
1973 ;
1974
1975static_assert:
1976 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1977 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
1978 | STATICASSERT '(' constant_expression ')' ';' // CFA
1979 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
1980
1981// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1982// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1983// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1984// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1985// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1986// block, but cannot be mixed within a specific declaration.
1987//
1988// CFA C
1989// [10] int x; int x[10]; // array of 10 integers
1990// [10] * char y; char *y[10]; // array of 10 pointers to char
1991
1992cfa_declaration: // CFA
1993 cfa_variable_declaration
1994 | cfa_typedef_declaration
1995 | cfa_function_declaration
1996 | type_declaring_list
1997 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1998 | trait_specifier
1999 ;
2000
2001cfa_variable_declaration: // CFA
2002 cfa_variable_specifier initializer_opt
2003 { $$ = $1->addInitializer( $2 ); }
2004 | declaration_qualifier_list cfa_variable_specifier initializer_opt
2005 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
2006 // them as a type_qualifier cannot appear in that context.
2007 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
2008 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
2009 { $$ = $1->set_last( $1->cloneType( $5 )->addInitializer( $6 ) ); }
2010 ;
2011
2012cfa_variable_specifier: // CFA
2013 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2014 // storage-class
2015 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
2016 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2017 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
2018 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2019 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
2020 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
2021 ;
2022
2023cfa_function_declaration: // CFA
2024 cfa_function_specifier
2025 | type_qualifier_list cfa_function_specifier
2026 { $$ = $2->addQualifiers( $1 ); }
2027 | declaration_qualifier_list cfa_function_specifier
2028 { $$ = $2->addQualifiers( $1 ); }
2029 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
2030 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
2031 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')'
2032 {
2033 // Append the return type at the start (left-hand-side) to each identifier in the list.
2034 DeclarationNode * ret = new DeclarationNode;
2035 ret->type = maybeCopy( $1->type->base );
2036 $$ = $1->set_last( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
2037 }
2038 ;
2039
2040cfa_function_specifier: // CFA
2041 '[' ']' identifier '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2042 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2043 | '[' ']' TYPEDEFname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2044 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2045 // | '[' ']' TYPEGENname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2046 // { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2047
2048 // identifier_or_type_name must be broken apart because of the sequence:
2049 //
2050 // '[' ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
2051 // '[' ']' type_specifier
2052 //
2053 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
2054 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
2055 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2056 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
2057 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2058 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2059 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2060 ;
2061
2062cfa_function_return: // CFA
2063 '[' push cfa_parameter_list pop ']'
2064 { $$ = DeclarationNode::newTuple( $3 ); }
2065 | '[' push cfa_parameter_list ',' cfa_abstract_parameter_list pop ']'
2066 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
2067 { $$ = DeclarationNode::newTuple( $3->set_last( $5 ) ); }
2068 ;
2069
2070cfa_typedef_declaration: // CFA
2071 TYPEDEF cfa_variable_specifier
2072 {
2073 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
2074 $$ = $2->addTypedef();
2075 }
2076 | TYPEDEF cfa_function_specifier
2077 {
2078 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2079 $$ = $2->addTypedef();
2080 }
2081 | cfa_typedef_declaration ',' identifier
2082 {
2083 typedefTable.addToEnclosingScope( *$3, TYPEDEFname, "cfa_typedef_declaration 3" );
2084 $$ = $1->set_last( $1->cloneType( $3 ) );
2085 }
2086 ;
2087
2088// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2089// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2090
2091typedef_declaration:
2092 TYPEDEF type_specifier declarator
2093 {
2094 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2095 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2096 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2097 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2098 }
2099 | typedef_declaration ',' declarator
2100 {
2101 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2102 $$ = $1->set_last( $1->cloneBaseType( $3 )->addTypedef() );
2103 }
2104 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2105 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2106 | type_specifier TYPEDEF declarator
2107 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2108 | type_specifier TYPEDEF type_qualifier_list declarator
2109 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2110 ;
2111
2112typedef_expression:
2113 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2114 TYPEDEF identifier '=' assignment_expression
2115 {
2116 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2117 }
2118 | typedef_expression ',' identifier '=' assignment_expression
2119 {
2120 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2121 }
2122 ;
2123
2124c_declaration:
2125 declaration_specifier declaring_list
2126 { $$ = distAttr( $1, $2 ); }
2127 | typedef_declaration
2128 | typedef_expression // deprecated GCC, naming expression type
2129 | sue_declaration_specifier
2130 {
2131 assert( $1->type );
2132 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2133 SemanticError( yylloc, "syntax error, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2134 }
2135 // enums are never empty declarations because there must have at least one enumeration.
2136 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2137 SemanticError( yylloc, "syntax error, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2138 }
2139 }
2140 ;
2141
2142declaring_list:
2143 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2144 // storage-class
2145 variable_declarator asm_name_opt initializer_opt
2146 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2147 | variable_type_redeclarator asm_name_opt initializer_opt
2148 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2149
2150 | general_function_declarator asm_name_opt
2151 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2152 | general_function_declarator asm_name_opt '=' VOID
2153 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2154
2155 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2156 { $$ = $1->set_last( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2157 ;
2158
2159general_function_declarator:
2160 function_type_redeclarator
2161 | function_declarator
2162 ;
2163
2164declaration_specifier: // type specifier + storage class
2165 basic_declaration_specifier
2166 | type_declaration_specifier
2167 | sue_declaration_specifier
2168 | sue_declaration_specifier invalid_types // invalid syntax rule
2169 {
2170 SemanticError( yylloc, "syntax error, expecting ';' at end of \"%s\" declaration.",
2171 $1->type->enumeration.name ? "enum" : ast::AggregateDecl::aggrString( $1->type->aggregate.kind ) );
2172 $$ = nullptr;
2173 }
2174 ;
2175
2176invalid_types:
2177 aggregate_key
2178 | basic_type_name
2179 | indirect_type
2180 ;
2181
2182declaration_specifier_nobody: // type specifier + storage class - {...}
2183 // Preclude SUE declarations in restricted scopes:
2184 //
2185 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2186 //
2187 // because it is impossible to call f due to name equivalence.
2188 basic_declaration_specifier
2189 | sue_declaration_specifier_nobody
2190 | type_declaration_specifier
2191 ;
2192
2193type_specifier: // type specifier
2194 basic_type_specifier
2195 | sue_type_specifier
2196 | type_type_specifier
2197 ;
2198
2199type_specifier_nobody: // type specifier - {...}
2200 // Preclude SUE declarations in restricted scopes:
2201 //
2202 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2203 //
2204 // because it is impossible to call f due to name equivalence.
2205 basic_type_specifier
2206 | sue_type_specifier_nobody
2207 | type_type_specifier
2208 ;
2209
2210type_qualifier_list_opt: // GCC, used in asm_statement
2211 // empty
2212 { $$ = nullptr; }
2213 | type_qualifier_list
2214 ;
2215
2216type_qualifier_list:
2217 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2218 //
2219 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2220 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2221 // appeared only once.
2222 type_qualifier
2223 | type_qualifier_list type_qualifier
2224 { $$ = $1->addQualifiers( $2 ); }
2225 ;
2226
2227type_qualifier:
2228 type_qualifier_name
2229 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2230 | attribute // trick handles most attribute locations
2231 ;
2232
2233type_qualifier_name:
2234 CONST
2235 { $$ = build_type_qualifier( ast::CV::Const ); }
2236 | RESTRICT
2237 { $$ = build_type_qualifier( ast::CV::Restrict ); }
2238 | VOLATILE
2239 { $$ = build_type_qualifier( ast::CV::Volatile ); }
2240 | ATOMIC
2241 { $$ = build_type_qualifier( ast::CV::Atomic ); }
2242
2243 // forall must be a CV qualifier because it can appear in places where SC qualifiers are disallowed.
2244 //
2245 // void foo( forall( T ) T (*)( T ) ); // forward declaration
2246 // void bar( static int ); // static disallowed (gcc/CFA)
2247 | forall
2248 { $$ = build_forall( $1 ); }
2249 ;
2250
2251forall:
2252 FORALL '(' type_parameter_list ')' // CFA
2253 { $$ = $3; }
2254 ;
2255
2256declaration_qualifier_list:
2257 storage_class_list
2258 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2259 { $$ = $1->addQualifiers( $2 ); }
2260 | declaration_qualifier_list type_qualifier_list storage_class_list
2261 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2262 ;
2263
2264storage_class_list:
2265 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2266 // only one of each is specified, except for inline, which can appear with the others.
2267 //
2268 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2269 // specifiers in a declaration.
2270 storage_class
2271 | storage_class_list storage_class
2272 { $$ = $1->addQualifiers( $2 ); }
2273 ;
2274
2275storage_class:
2276 EXTERN
2277 { $$ = DeclarationNode::newStorageClass( ast::Storage::Extern ); }
2278 | STATIC
2279 { $$ = DeclarationNode::newStorageClass( ast::Storage::Static ); }
2280 | AUTO
2281 { $$ = DeclarationNode::newStorageClass( ast::Storage::Auto ); }
2282 | REGISTER
2283 { $$ = DeclarationNode::newStorageClass( ast::Storage::Register ); }
2284 | THREADLOCALGCC // GCC
2285 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalGcc ); }
2286 | THREADLOCALC11 // C11
2287 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalC11 ); }
2288 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2289 | INLINE // C99
2290 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Inline ); }
2291 | FORTRAN // C99
2292 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Fortran ); }
2293 | NORETURN // C11
2294 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Noreturn ); }
2295 ;
2296
2297basic_type_name:
2298 basic_type_name_type
2299 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2300 ;
2301
2302// Just an intermediate value for conversion.
2303basic_type_name_type:
2304 VOID
2305 { $$ = build_basic_type( DeclarationNode::Void ); }
2306 | BOOL // C99
2307 { $$ = build_basic_type( DeclarationNode::Bool ); }
2308 | CHAR
2309 { $$ = build_basic_type( DeclarationNode::Char ); }
2310 | INT
2311 { $$ = build_basic_type( DeclarationNode::Int ); }
2312 | INT128
2313 { $$ = build_basic_type( DeclarationNode::Int128 ); }
2314 | UINT128
2315 { $$ = addType( build_basic_type( DeclarationNode::Int128 ), build_signedness( DeclarationNode::Unsigned ) ); }
2316 | FLOAT
2317 { $$ = build_basic_type( DeclarationNode::Float ); }
2318 | DOUBLE
2319 { $$ = build_basic_type( DeclarationNode::Double ); }
2320 | uuFLOAT80
2321 { $$ = build_basic_type( DeclarationNode::uuFloat80 ); }
2322 | uuFLOAT128
2323 { $$ = build_basic_type( DeclarationNode::uuFloat128 ); }
2324 | uFLOAT16
2325 { $$ = build_basic_type( DeclarationNode::uFloat16 ); }
2326 | uFLOAT32
2327 { $$ = build_basic_type( DeclarationNode::uFloat32 ); }
2328 | uFLOAT32X
2329 { $$ = build_basic_type( DeclarationNode::uFloat32x ); }
2330 | uFLOAT64
2331 { $$ = build_basic_type( DeclarationNode::uFloat64 ); }
2332 | uFLOAT64X
2333 { $$ = build_basic_type( DeclarationNode::uFloat64x ); }
2334 | uFLOAT128
2335 { $$ = build_basic_type( DeclarationNode::uFloat128 ); }
2336 | DECIMAL32
2337 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2338 | DECIMAL64
2339 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2340 | DECIMAL128
2341 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2342 | COMPLEX // C99
2343 { $$ = build_complex_type( DeclarationNode::Complex ); }
2344 | IMAGINARY // C99
2345 { $$ = build_complex_type( DeclarationNode::Imaginary ); }
2346 | SIGNED
2347 { $$ = build_signedness( DeclarationNode::Signed ); }
2348 | UNSIGNED
2349 { $$ = build_signedness( DeclarationNode::Unsigned ); }
2350 | SHORT
2351 { $$ = build_length( DeclarationNode::Short ); }
2352 | LONG
2353 { $$ = build_length( DeclarationNode::Long ); }
2354 | VA_LIST // GCC, __builtin_va_list
2355 { $$ = build_builtin_type( DeclarationNode::Valist ); }
2356 | AUTO_TYPE
2357 { $$ = build_builtin_type( DeclarationNode::AutoType ); }
2358 | vtable
2359 ;
2360
2361vtable_opt:
2362 // empty
2363 { $$ = nullptr; }
2364 | vtable
2365 ;
2366
2367vtable:
2368 VTABLE '(' type_name ')' default_opt
2369 { $$ = build_vtable_type( $3 ); }
2370 ;
2371
2372default_opt:
2373 // empty
2374 { $$ = nullptr; }
2375 | DEFAULT
2376 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2377 ;
2378
2379basic_declaration_specifier:
2380 // A semantic check is necessary for conflicting storage classes.
2381 basic_type_specifier
2382 | declaration_qualifier_list basic_type_specifier
2383 { $$ = $2->addQualifiers( $1 ); }
2384 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2385 { $$ = $1->addQualifiers( $2 ); }
2386 | basic_declaration_specifier storage_class type_qualifier_list
2387 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2388 | basic_declaration_specifier storage_class basic_type_specifier
2389 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2390 ;
2391
2392basic_type_specifier:
2393 direct_type
2394 // Cannot have type modifiers, e.g., short, long, etc.
2395 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2396 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2397 ;
2398
2399direct_type:
2400 basic_type_name
2401 | type_qualifier_list basic_type_name
2402 { $$ = $2->addQualifiers( $1 ); }
2403 | direct_type type_qualifier
2404 { $$ = $1->addQualifiers( $2 ); }
2405 | direct_type basic_type_name
2406 { $$ = $1->addType( $2 ); }
2407 ;
2408
2409indirect_type:
2410 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2411 { $$ = $3; }
2412 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2413 { $$ = DeclarationNode::newTypeof( $3 ); }
2414 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2415 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2416 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2417 { $$ = DeclarationNode::newTypeof( $3, true ); }
2418 | ZERO_T // CFA
2419 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( DeclarationNode::Zero ) ); }
2420 | ONE_T // CFA
2421 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( DeclarationNode::One ) ); }
2422 ;
2423
2424sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2425 sue_type_specifier
2426 | declaration_qualifier_list sue_type_specifier
2427 { $$ = $2->addQualifiers( $1 ); }
2428 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2429 { $$ = $1->addQualifiers( $2 ); }
2430 | sue_declaration_specifier storage_class type_qualifier_list
2431 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2432 ;
2433
2434sue_type_specifier: // struct, union, enum + type specifier
2435 elaborated_type
2436 | type_qualifier_list
2437 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2438 elaborated_type
2439 { $$ = $3->addQualifiers( $1 ); }
2440 | sue_type_specifier type_qualifier
2441 {
2442 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2443 $$ = $1->addQualifiers( $2 );
2444 }
2445 ;
2446
2447sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2448 sue_type_specifier_nobody
2449 | declaration_qualifier_list sue_type_specifier_nobody
2450 { $$ = $2->addQualifiers( $1 ); }
2451 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2452 { $$ = $1->addQualifiers( $2 ); }
2453 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2454 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2455 ;
2456
2457sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2458 elaborated_type_nobody
2459 | type_qualifier_list elaborated_type_nobody
2460 { $$ = $2->addQualifiers( $1 ); }
2461 | sue_type_specifier_nobody type_qualifier
2462 { $$ = $1->addQualifiers( $2 ); }
2463 ;
2464
2465type_declaration_specifier:
2466 type_type_specifier
2467 | declaration_qualifier_list type_type_specifier
2468 { $$ = $2->addQualifiers( $1 ); }
2469 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2470 { $$ = $1->addQualifiers( $2 ); }
2471 | type_declaration_specifier storage_class type_qualifier_list
2472 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2473 ;
2474
2475type_type_specifier: // typedef types
2476 type_name
2477 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2478 | type_qualifier_list type_name
2479 { $$ = DeclarationNode::newFromTypeData( $2 )->addQualifiers( $1 ); }
2480 | type_type_specifier type_qualifier
2481 { $$ = $1->addQualifiers( $2 ); }
2482 ;
2483
2484type_name:
2485 TYPEDEFname
2486 { $$ = build_typedef( $1 ); }
2487 | '.' TYPEDEFname
2488 { $$ = build_qualified_type( build_global_scope(), build_typedef( $2 ) ); }
2489 | type_name '.' TYPEDEFname
2490 { $$ = build_qualified_type( $1, build_typedef( $3 ) ); }
2491 | typegen_name
2492 | '.' typegen_name
2493 { $$ = build_qualified_type( build_global_scope(), $2 ); }
2494 | type_name '.' typegen_name
2495 { $$ = build_qualified_type( $1, $3 ); }
2496 ;
2497
2498typegen_name: // CFA
2499 TYPEGENname
2500 { $$ = build_type_gen( $1, nullptr ); }
2501 | TYPEGENname '(' ')'
2502 { $$ = build_type_gen( $1, nullptr ); }
2503 | TYPEGENname '(' type_list ')'
2504 { $$ = build_type_gen( $1, $3 ); }
2505 ;
2506
2507elaborated_type: // struct, union, enum
2508 aggregate_type
2509 | enum_type
2510 ;
2511
2512elaborated_type_nobody: // struct, union, enum - {...}
2513 aggregate_type_nobody
2514 | enum_type_nobody
2515 ;
2516
2517// ************************** AGGREGATE *******************************
2518
2519aggregate_type: // struct, union
2520 aggregate_key attribute_list_opt
2521 { forall = false; } // reset
2522 '{' field_declaration_list_opt '}' type_parameters_opt
2523 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2524 | aggregate_key attribute_list_opt identifier
2525 {
2526 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2527 forall = false; // reset
2528 }
2529 '{' field_declaration_list_opt '}' type_parameters_opt
2530 {
2531 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2532 }
2533 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2534 {
2535 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2536 forall = false; // reset
2537 }
2538 '{' field_declaration_list_opt '}' type_parameters_opt
2539 {
2540 DeclarationNode::newFromTypeData( build_typedef( $3 ) );
2541 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2542 }
2543 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2544 {
2545 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2546 forall = false; // reset
2547 }
2548 '{' field_declaration_list_opt '}' type_parameters_opt
2549 {
2550 DeclarationNode::newFromTypeData( build_type_gen( $3, nullptr ) );
2551 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2552 }
2553 | aggregate_type_nobody
2554 ;
2555
2556type_parameters_opt:
2557 // empty
2558 { $$ = nullptr; } %prec '}'
2559 | '(' type_list ')'
2560 { $$ = $2; }
2561 ;
2562
2563aggregate_type_nobody: // struct, union - {...}
2564 aggregate_key attribute_list_opt identifier
2565 {
2566 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2567 forall = false; // reset
2568 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2569 }
2570 | aggregate_key attribute_list_opt type_name
2571 {
2572 forall = false; // reset
2573 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2574 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2575 if ( $3->kind == TypeData::SymbolicInst && ! $3->symbolic.isTypedef ) {
2576 $$ = DeclarationNode::newFromTypeData( $3 )->addQualifiers( $2 );
2577 } else {
2578 $$ = DeclarationNode::newAggregate( $1, $3->symbolic.name, $3->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2579 $3->symbolic.name = nullptr; // copied to $$
2580 $3->symbolic.actuals = nullptr;
2581 delete $3;
2582 }
2583 }
2584 ;
2585
2586aggregate_key:
2587 aggregate_data
2588 | aggregate_control
2589 ;
2590
2591aggregate_data:
2592 STRUCT vtable_opt
2593 { $$ = ast::AggregateDecl::Struct; }
2594 | UNION
2595 { $$ = ast::AggregateDecl::Union; }
2596 | EXCEPTION // CFA
2597 { $$ = ast::AggregateDecl::Exception; }
2598 ;
2599
2600aggregate_control: // CFA
2601 MONITOR
2602 { $$ = ast::AggregateDecl::Monitor; }
2603 | MUTEX STRUCT
2604 { $$ = ast::AggregateDecl::Monitor; }
2605 | GENERATOR
2606 { $$ = ast::AggregateDecl::Generator; }
2607 | MUTEX GENERATOR
2608 {
2609 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2610 $$ = ast::AggregateDecl::NoAggregate;
2611 }
2612 | COROUTINE
2613 { $$ = ast::AggregateDecl::Coroutine; }
2614 | MUTEX COROUTINE
2615 {
2616 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2617 $$ = ast::AggregateDecl::NoAggregate;
2618 }
2619 | THREAD
2620 { $$ = ast::AggregateDecl::Thread; }
2621 | MUTEX THREAD
2622 {
2623 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2624 $$ = ast::AggregateDecl::NoAggregate;
2625 }
2626 ;
2627
2628field_declaration_list_opt:
2629 // empty
2630 { $$ = nullptr; }
2631 | field_declaration_list_opt field_declaration
2632 { $$ = $1 ? $1->set_last( $2 ) : $2; }
2633 ;
2634
2635field_declaration:
2636 type_specifier field_declaring_list_opt ';'
2637 {
2638 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2639 $$ = fieldDecl( $1, $2 );
2640 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2641 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2642 // printf( "\tattr %s\n", attr->name.c_str() );
2643 // } // for
2644 }
2645 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2646 {
2647 SemanticError( yylloc, "syntax error, expecting ';' at end of previous declaration." );
2648 $$ = nullptr;
2649 }
2650 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2651 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2652 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2653 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2654 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2655 {
2656 if ( ! $3 ) { // field declarator ?
2657 $3 = DeclarationNode::newName( nullptr );
2658 } // if
2659 $3->inLine = true;
2660 $$ = distAttr( $2, $3 ); // mark all fields in list
2661 distInl( $3 );
2662 }
2663 | INLINE aggregate_control ';' // CFA
2664 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2665 | typedef_declaration ';' // CFA
2666 | cfa_field_declaring_list ';' // CFA, new style field declaration
2667 | EXTENSION cfa_field_declaring_list ';' // GCC
2668 { distExt( $2 ); $$ = $2; } // mark all fields in list
2669 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2670 { $$ = $2; } // mark all fields in list
2671 | cfa_typedef_declaration ';' // CFA
2672 | static_assert // C11
2673 ;
2674
2675field_declaring_list_opt:
2676 // empty
2677 { $$ = nullptr; }
2678 | field_declarator
2679 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2680 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2681 ;
2682
2683field_declarator:
2684 bit_subrange_size // C special case, no field name
2685 { $$ = DeclarationNode::newBitfield( $1 ); }
2686 | variable_declarator bit_subrange_size_opt
2687 // A semantic check is required to ensure bit_subrange only appears on integral types.
2688 { $$ = $1->addBitfield( $2 ); }
2689 | variable_type_redeclarator bit_subrange_size_opt
2690 // A semantic check is required to ensure bit_subrange only appears on integral types.
2691 { $$ = $1->addBitfield( $2 ); }
2692 | function_type_redeclarator bit_subrange_size_opt
2693 // A semantic check is required to ensure bit_subrange only appears on integral types.
2694 { $$ = $1->addBitfield( $2 ); }
2695 ;
2696
2697field_abstract_list_opt:
2698 // empty
2699 { $$ = nullptr; }
2700 | field_abstract
2701 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2702 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2703 ;
2704
2705field_abstract:
2706 // no bit fields
2707 variable_abstract_declarator
2708 ;
2709
2710cfa_field_declaring_list: // CFA, new style field declaration
2711 // bit-fields are handled by C declarations
2712 cfa_abstract_declarator_tuple identifier_or_type_name
2713 { $$ = $1->addName( $2 ); }
2714 | cfa_field_declaring_list ',' identifier_or_type_name
2715 { $$ = $1->set_last( $1->cloneType( $3 ) ); }
2716 ;
2717
2718cfa_field_abstract_list: // CFA, new style field declaration
2719 // bit-fields are handled by C declarations
2720 cfa_abstract_declarator_tuple
2721 | cfa_field_abstract_list ','
2722 { $$ = $1->set_last( $1->cloneType( 0 ) ); }
2723 ;
2724
2725bit_subrange_size_opt:
2726 // empty
2727 { $$ = nullptr; }
2728 | bit_subrange_size
2729 ;
2730
2731bit_subrange_size:
2732 ':' assignment_expression
2733 { $$ = $2; }
2734 ;
2735
2736// ************************** ENUMERATION *******************************
2737
2738enum_type:
2739 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
2740 { $$ = DeclarationNode::newEnum( nullptr, $4, true, false )->addQualifiers( $2 ); }
2741 | ENUM attribute_list_opt '!' '{' enumerator_list comma_opt '}' // invalid syntax rule
2742 { SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2743 | ENUM attribute_list_opt identifier
2744 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2745 hide_opt '{' enumerator_list comma_opt '}'
2746 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2747 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2748 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2749 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2750 {
2751 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.any() ) {
2752 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2753 }
2754 $$ = DeclarationNode::newEnum( nullptr, $7, true, true, $3 )->addQualifiers( $5 );
2755 }
2756 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '!' '{' enumerator_list comma_opt '}' // unqualified type name
2757 { SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2758 | ENUM '(' ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2759 {
2760 $$ = DeclarationNode::newEnum( nullptr, $6, true, true )->addQualifiers( $4 );
2761 }
2762 | ENUM '(' ')' attribute_list_opt '!' '{' enumerator_list comma_opt '}' // invalid syntax rule
2763 { SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2764 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt identifier attribute_list_opt
2765 {
2766 if ( $3 && ($3->storageClasses.any() || $3->type->qualifiers.val != 0) ) {
2767 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2768 }
2769 typedefTable.makeTypedef( *$6, "enum_type 2" );
2770 }
2771 hide_opt '{' enumerator_list comma_opt '}'
2772 {
2773 $$ = DeclarationNode::newEnum( $6, $11, true, true, $3, $9 )->addQualifiers( $5 )->addQualifiers( $7 );
2774 }
2775 | ENUM '(' ')' attribute_list_opt identifier attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2776 {
2777 $$ = DeclarationNode::newEnum( $5, $9, true, true, nullptr, $7 )->addQualifiers( $4 )->addQualifiers( $6 );
2778 }
2779 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2780 {
2781 $$ = DeclarationNode::newEnum( $6->name, $10, true, true, $3, $8 )->addQualifiers( $5 )->addQualifiers( $7 );
2782 }
2783 | ENUM '(' ')' attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2784 {
2785 $$ = DeclarationNode::newEnum( $5->name, $9, true, true, nullptr, $7 )->addQualifiers( $4 )->addQualifiers( $6 );
2786 }
2787 | enum_type_nobody
2788 ;
2789
2790hide_opt:
2791 // empty
2792 { $$ = EnumHiding::Visible; }
2793 | '!'
2794 { $$ = EnumHiding::Hide; }
2795 ;
2796
2797enum_type_nobody: // enum - {...}
2798 ENUM attribute_list_opt identifier
2799 {
2800 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2801 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2802 }
2803 | ENUM attribute_list_opt type_name
2804 {
2805 typedefTable.makeTypedef( *$3->symbolic.name, "enum_type_nobody 2" );
2806 $$ = DeclarationNode::newEnum( $3->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2807 }
2808 ;
2809
2810enumerator_list:
2811 visible_hide_opt identifier_or_type_name enumerator_value_opt
2812 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2813 | INLINE type_name
2814 { $$ = DeclarationNode::newEnumInLine( *$2->symbolic.name ); }
2815 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2816 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2817 | enumerator_list ',' INLINE type_name enumerator_value_opt
2818 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( new string("inline"), nullptr ) ); }
2819 ;
2820
2821visible_hide_opt:
2822 hide_opt
2823 | '^'
2824 { $$ = EnumHiding::Visible; }
2825 ;
2826
2827enumerator_value_opt:
2828 // empty
2829 { $$ = nullptr; }
2830 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2831 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2832 // | simple_assignment_operator initializer
2833 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2834 ;
2835
2836// ************************** FUNCTION PARAMETERS *******************************
2837
2838parameter_list_ellipsis_opt:
2839 // empty
2840 { $$ = nullptr; }
2841 | ELLIPSIS
2842 { $$ = nullptr; }
2843 | parameter_list
2844 | parameter_list ',' ELLIPSIS
2845 { $$ = $1->addVarArgs(); }
2846 ;
2847
2848parameter_list: // abstract + real
2849 parameter_declaration
2850 | abstract_parameter_declaration
2851 | parameter_list ',' parameter_declaration
2852 { $$ = $1->set_last( $3 ); }
2853 | parameter_list ',' abstract_parameter_declaration
2854 { $$ = $1->set_last( $3 ); }
2855 ;
2856
2857cfa_parameter_list_ellipsis_opt: // CFA, abstract + real
2858 // empty
2859 { $$ = DeclarationNode::newFromTypeData( build_basic_type( DeclarationNode::Void ) ); }
2860 | ELLIPSIS
2861 { $$ = nullptr; }
2862 | cfa_parameter_list
2863 | cfa_abstract_parameter_list
2864 | cfa_parameter_list ',' cfa_abstract_parameter_list
2865 { $$ = $1->set_last( $3 ); }
2866 | cfa_parameter_list ',' ELLIPSIS
2867 { $$ = $1->addVarArgs(); }
2868 | cfa_abstract_parameter_list ',' ELLIPSIS
2869 { $$ = $1->addVarArgs(); }
2870 ;
2871
2872cfa_parameter_list: // CFA
2873 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2874 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2875 cfa_parameter_declaration
2876 | cfa_abstract_parameter_list ',' cfa_parameter_declaration
2877 { $$ = $1->set_last( $3 ); }
2878 | cfa_parameter_list ',' cfa_parameter_declaration
2879 { $$ = $1->set_last( $3 ); }
2880 | cfa_parameter_list ',' cfa_abstract_parameter_list ',' cfa_parameter_declaration
2881 { $$ = $1->set_last( $3 )->set_last( $5 ); }
2882 ;
2883
2884cfa_abstract_parameter_list: // CFA, new & old style abstract
2885 cfa_abstract_parameter_declaration
2886 | cfa_abstract_parameter_list ',' cfa_abstract_parameter_declaration
2887 { $$ = $1->set_last( $3 ); }
2888 ;
2889
2890// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2891// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2892
2893parameter_declaration:
2894 // No SUE declaration in parameter list.
2895 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2896 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2897 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2898 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2899 ;
2900
2901abstract_parameter_declaration:
2902 declaration_specifier_nobody default_initializer_opt
2903 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2904 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2905 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2906 ;
2907
2908cfa_parameter_declaration: // CFA, new & old style parameter declaration
2909 parameter_declaration
2910 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2911 { $$ = $1->addName( $2 ); }
2912 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2913 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2914 { $$ = $1->addName( $2 ); }
2915 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2916 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2917 | cfa_function_specifier // int f( "int fp()" );
2918 ;
2919
2920cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2921 abstract_parameter_declaration
2922 | cfa_identifier_parameter_declarator_no_tuple
2923 | cfa_abstract_tuple
2924 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2925 | type_qualifier_list cfa_abstract_tuple
2926 { $$ = $2->addQualifiers( $1 ); }
2927 | cfa_abstract_function // int f( "int ()" );
2928 ;
2929
2930// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2931// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2932// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2933
2934identifier_list: // K&R-style parameter list => no types
2935 identifier
2936 { $$ = DeclarationNode::newName( $1 ); }
2937 | identifier_list ',' identifier
2938 { $$ = $1->set_last( DeclarationNode::newName( $3 ) ); }
2939 ;
2940
2941identifier_or_type_name:
2942 identifier
2943 | TYPEDEFname
2944 | TYPEGENname
2945 ;
2946
2947type_no_function: // sizeof, alignof, cast (constructor)
2948 cfa_abstract_declarator_tuple // CFA
2949 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2950 | type_specifier abstract_declarator
2951 { $$ = $2->addType( $1 ); }
2952 ;
2953
2954type: // typeof, assertion
2955 type_no_function
2956 | cfa_abstract_function // CFA
2957 ;
2958
2959initializer_opt:
2960 // empty
2961 { $$ = nullptr; }
2962 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2963 | '=' VOID { $$ = new InitializerNode( true ); }
2964 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2965 ;
2966
2967initializer:
2968 assignment_expression { $$ = new InitializerNode( $1 ); }
2969 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2970 ;
2971
2972initializer_list_opt:
2973 // empty
2974 { $$ = nullptr; }
2975 | initializer
2976 | designation initializer { $$ = $2->set_designators( $1 ); }
2977 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2978 | initializer_list_opt ',' designation initializer { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2979 ;
2980
2981// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2982// '=' to separator the designator from the initializer value, as in:
2983//
2984// int x[10] = { [1] = 3 };
2985//
2986// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2987// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2988// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2989// shift/reduce conflicts
2990
2991designation:
2992 designator_list ':' // C99, CFA uses ":" instead of "="
2993 | identifier_at ':' // GCC, field name
2994 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
2995 ;
2996
2997designator_list: // C99
2998 designator
2999 | designator_list designator
3000 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
3001 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
3002 ;
3003
3004designator:
3005 '.' identifier_at // C99, field name
3006 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
3007 | '[' push assignment_expression pop ']' // C99, single array element
3008 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
3009 { $$ = $3; }
3010 | '[' push subrange pop ']' // CFA, multiple array elements
3011 { $$ = $3; }
3012 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
3013 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
3014 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
3015 { $$ = $4; }
3016 ;
3017
3018// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
3019// rather than an object-oriented type system. This required four groups of extensions:
3020//
3021// Overloading: function, data, and operator identifiers may be overloaded.
3022//
3023// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
3024// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
3025// definitions of new types. Type declarations with storage class "extern" provide opaque types.
3026//
3027// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
3028// site. A polymorphic function is not a template; it is a function, with an address and a type.
3029//
3030// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
3031// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
3032// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
3033// types provide the operations declared by a specification. Assertions are normally used to declare requirements
3034// on type arguments of polymorphic functions.
3035
3036type_parameter_list: // CFA
3037 type_parameter
3038 | type_parameter_list ',' type_parameter
3039 { $$ = $1->set_last( $3 ); }
3040 ;
3041
3042type_initializer_opt: // CFA
3043 // empty
3044 { $$ = nullptr; }
3045 | '=' type
3046 { $$ = $2; }
3047 ;
3048
3049type_parameter: // CFA
3050 type_class identifier_or_type_name
3051 {
3052 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
3053 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
3054 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
3055 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
3056 }
3057 type_initializer_opt assertion_list_opt
3058 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3059 | identifier_or_type_name new_type_class
3060 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
3061 type_initializer_opt assertion_list_opt
3062 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3063 | '[' identifier_or_type_name ']'
3064 {
3065 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
3066 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
3067 }
3068 // | type_specifier identifier_parameter_declarator
3069 | assertion_list
3070 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
3071 | ENUM '(' identifier_or_type_name ')' identifier_or_type_name new_type_class type_initializer_opt assertion_list_opt
3072 {
3073 typedefTable.addToScope( *$3, TYPEDIMname, "type_parameter 4" );
3074 typedefTable.addToScope( *$5, TYPEDIMname, "type_parameter 5" );
3075 $$ = DeclarationNode::newTypeParam( $6, $5 )->addTypeInitializer( $7 )->addAssertions( $8 );
3076 }
3077 ;
3078
3079new_type_class: // CFA
3080 // empty
3081 { $$ = ast::TypeDecl::Otype; }
3082 | '&'
3083 { $$ = ast::TypeDecl::Dtype; }
3084 | '*'
3085 { $$ = ast::TypeDecl::DStype; } // Dtype + sized
3086 // | '(' '*' ')' // Gregor made me do it
3087 // { $$ = ast::TypeDecl::Ftype; }
3088 | ELLIPSIS
3089 { $$ = ast::TypeDecl::Ttype; }
3090 ;
3091
3092type_class: // CFA
3093 OTYPE
3094 { $$ = ast::TypeDecl::Otype; }
3095 | DTYPE
3096 { $$ = ast::TypeDecl::Dtype; }
3097 | FTYPE
3098 { $$ = ast::TypeDecl::Ftype; }
3099 | TTYPE
3100 { $$ = ast::TypeDecl::Ttype; }
3101 ;
3102
3103assertion_list_opt: // CFA
3104 // empty
3105 { $$ = nullptr; }
3106 | assertion_list
3107 ;
3108
3109assertion_list: // CFA
3110 assertion
3111 | assertion_list assertion
3112 { $$ = $1->set_last( $2 ); }
3113 ;
3114
3115assertion: // CFA
3116 '|' identifier_or_type_name '(' type_list ')'
3117 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3118 | '|' '{' push trait_declaration_list pop '}'
3119 { $$ = $4; }
3120 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3121 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3122 ;
3123
3124type_list: // CFA
3125 type
3126 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3127 | assignment_expression
3128 | type_list ',' type
3129 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3130 | type_list ',' assignment_expression
3131 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
3132 ;
3133
3134type_declaring_list: // CFA
3135 OTYPE type_declarator
3136 { $$ = $2; }
3137 | storage_class_list OTYPE type_declarator
3138 { $$ = $3->addQualifiers( $1 ); }
3139 | type_declaring_list ',' type_declarator
3140 { $$ = $1->set_last( $3->copySpecifiers( $1 ) ); }
3141 ;
3142
3143type_declarator: // CFA
3144 type_declarator_name assertion_list_opt
3145 { $$ = $1->addAssertions( $2 ); }
3146 | type_declarator_name assertion_list_opt '=' type
3147 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3148 ;
3149
3150type_declarator_name: // CFA
3151 identifier_or_type_name
3152 {
3153 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3154 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3155 }
3156 | identifier_or_type_name '(' type_parameter_list ')'
3157 {
3158 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3159 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3160 }
3161 ;
3162
3163trait_specifier: // CFA
3164 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3165 {
3166 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3167 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3168 }
3169 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3170 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3171 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3172 {
3173 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3174 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3175 }
3176 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3177 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3178 ;
3179
3180trait_declaration_list: // CFA
3181 trait_declaration
3182 | trait_declaration_list pop push trait_declaration
3183 { $$ = $1->set_last( $4 ); }
3184 ;
3185
3186trait_declaration: // CFA
3187 cfa_trait_declaring_list ';'
3188 | trait_declaring_list ';'
3189 ;
3190
3191cfa_trait_declaring_list: // CFA
3192 cfa_variable_specifier
3193 | cfa_function_specifier
3194 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3195 { $$ = $1->set_last( $1->cloneType( $5 ) ); }
3196 ;
3197
3198trait_declaring_list: // CFA
3199 type_specifier declarator
3200 { $$ = $2->addType( $1 ); }
3201 | trait_declaring_list pop ',' push declarator
3202 { $$ = $1->set_last( $1->cloneBaseType( $5 ) ); }
3203 ;
3204
3205// **************************** EXTERNAL DEFINITIONS *****************************
3206
3207translation_unit:
3208 // empty, input file
3209 | external_definition_list
3210 { parseTree = parseTree ? parseTree->set_last( $1 ) : $1; }
3211 ;
3212
3213external_definition_list:
3214 push external_definition pop
3215 { $$ = $2; }
3216 | external_definition_list push external_definition pop
3217 { $$ = $1 ? $1->set_last( $3 ) : $3; }
3218 ;
3219
3220external_definition_list_opt:
3221 // empty
3222 { $$ = nullptr; }
3223 | external_definition_list
3224 ;
3225
3226up:
3227 { typedefTable.up( forall ); forall = false; }
3228 ;
3229
3230down:
3231 { typedefTable.down(); }
3232 ;
3233
3234external_definition:
3235 DIRECTIVE
3236 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3237 | declaration
3238 {
3239 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3240 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3241 // disallowed at the moment.
3242 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static &&
3243 $1->type && $1->type->kind == TypeData::AggregateInst ) {
3244 if ( $1->type->aggInst.aggregate->kind == TypeData::Enum && $1->type->aggInst.aggregate->enumeration.anon ) {
3245 SemanticError( yylloc, "extern anonymous enumeration is currently unimplemented." ); $$ = nullptr;
3246 } else if ( $1->type->aggInst.aggregate->aggregate.anon ) { // handles struct or union
3247 SemanticError( yylloc, "extern anonymous struct/union is currently unimplemented." ); $$ = nullptr;
3248 }
3249 }
3250 }
3251 | IDENTIFIER IDENTIFIER
3252 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3253 | IDENTIFIER type_qualifier // invalid syntax rule
3254 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3255 | IDENTIFIER storage_class // invalid syntax rule
3256 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3257 | IDENTIFIER basic_type_name // invalid syntax rule
3258 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3259 | IDENTIFIER TYPEDEFname // invalid syntax rule
3260 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3261 | IDENTIFIER TYPEGENname // invalid syntax rule
3262 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3263 | external_function_definition
3264 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3265 {
3266 distExt( $2 ); // mark all fields in list
3267 $$ = $2;
3268 }
3269 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3270 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3271 | EXTERN STRINGliteral
3272 {
3273 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3274 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3275 }
3276 up external_definition down
3277 {
3278 linkage = linkageStack.top();
3279 linkageStack.pop();
3280 $$ = $5;
3281 }
3282 | EXTERN STRINGliteral // C++-style linkage specifier
3283 {
3284 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3285 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3286 }
3287 '{' up external_definition_list_opt down '}'
3288 {
3289 linkage = linkageStack.top();
3290 linkageStack.pop();
3291 $$ = $6;
3292 }
3293 // global distribution
3294 | type_qualifier_list
3295 {
3296 if ( $1->type->qualifiers.any() ) {
3297 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3298 }
3299 if ( $1->type->forall ) forall = true; // remember generic type
3300 }
3301 '{' up external_definition_list_opt down '}' // CFA, namespace
3302 {
3303 distQual( $5, $1 );
3304 forall = false;
3305 $$ = $5;
3306 }
3307 | declaration_qualifier_list
3308 {
3309 if ( $1->type && $1->type->qualifiers.any() ) {
3310 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3311 }
3312 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3313 }
3314 '{' up external_definition_list_opt down '}' // CFA, namespace
3315 {
3316 distQual( $5, $1 );
3317 forall = false;
3318 $$ = $5;
3319 }
3320 | declaration_qualifier_list type_qualifier_list
3321 {
3322 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3323 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3324 }
3325 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3326 }
3327 '{' up external_definition_list_opt down '}' // CFA, namespace
3328 {
3329 distQual( $6, $1->addQualifiers( $2 ) );
3330 forall = false;
3331 $$ = $6;
3332 }
3333 ;
3334
3335external_function_definition:
3336 function_definition
3337 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3338 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3339 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3340 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3341 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3342 | function_declarator compound_statement
3343 { $$ = $1->addFunctionBody( $2 ); }
3344 | KR_function_declarator KR_parameter_list_opt compound_statement
3345 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3346 ;
3347
3348with_clause_opt:
3349 // empty
3350 { $$ = nullptr; forall = false; }
3351 | WITH '(' tuple_expression_list ')' attribute_list_opt
3352 {
3353 $$ = $3; forall = false;
3354 if ( $5 ) {
3355 SemanticError( yylloc, "syntax error, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3356 $$ = nullptr;
3357 } // if
3358 }
3359 ;
3360
3361function_definition:
3362 cfa_function_declaration with_clause_opt compound_statement // CFA
3363 {
3364 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3365 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3366 $1->get_last()->addFunctionBody( $3, $2 );
3367 $$ = $1;
3368 }
3369 | declaration_specifier function_declarator with_clause_opt compound_statement
3370 {
3371 rebindForall( $1, $2 );
3372 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3373 }
3374 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3375 {
3376 rebindForall( $1, $2 );
3377 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3378 }
3379 // handles default int return type, OBSOLESCENT (see 1)
3380 | type_qualifier_list function_declarator with_clause_opt compound_statement
3381 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3382 // handles default int return type, OBSOLESCENT (see 1)
3383 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3384 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3385 // handles default int return type, OBSOLESCENT (see 1)
3386 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3387 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3388
3389 // Old-style K&R function definition, OBSOLESCENT (see 4)
3390 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3391 {
3392 rebindForall( $1, $2 );
3393 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3394 }
3395 // handles default int return type, OBSOLESCENT (see 1)
3396 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3397 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3398 // handles default int return type, OBSOLESCENT (see 1)
3399 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3400 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3401 // handles default int return type, OBSOLESCENT (see 1)
3402 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3403 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3404 ;
3405
3406declarator:
3407 variable_declarator
3408 | variable_type_redeclarator
3409 | function_declarator
3410 | function_type_redeclarator
3411 ;
3412
3413subrange:
3414 constant_expression '~' constant_expression // CFA, integer subrange
3415 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3416 ;
3417
3418// **************************** ASM *****************************
3419
3420asm_name_opt: // GCC
3421 // empty
3422 { $$ = nullptr; }
3423 | ASM '(' string_literal ')' attribute_list_opt
3424 {
3425 DeclarationNode * name = new DeclarationNode();
3426 name->asmName = maybeMoveBuild( $3 );
3427 $$ = name->addQualifiers( $5 );
3428 }
3429 ;
3430
3431// **************************** ATTRIBUTE *****************************
3432
3433attribute_list_opt: // GCC
3434 // empty
3435 { $$ = nullptr; }
3436 | attribute_list
3437 ;
3438
3439attribute_list: // GCC
3440 attribute
3441 | attribute_list attribute
3442 { $$ = $2->addQualifiers( $1 ); }
3443 ;
3444
3445attribute: // GCC
3446 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3447 { $$ = $4; }
3448 | ATTRIBUTE '(' attribute_name_list ')' // CFA
3449 { $$ = $3; }
3450 | ATTR '(' attribute_name_list ')' // CFA
3451 { $$ = $3; }
3452 ;
3453
3454attribute_name_list: // GCC
3455 attribute_name
3456 | attribute_name_list ',' attribute_name
3457 { $$ = $3->addQualifiers( $1 ); }
3458 ;
3459
3460attribute_name: // GCC
3461 // empty
3462 { $$ = nullptr; }
3463 | attr_name
3464 { $$ = DeclarationNode::newAttribute( $1 ); }
3465 | attr_name '(' argument_expression_list_opt ')'
3466 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3467 ;
3468
3469attr_name: // GCC
3470 IDENTIFIER
3471 | quasi_keyword
3472 | TYPEDEFname
3473 | TYPEGENname
3474 | FALLTHROUGH
3475 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3476 | CONST
3477 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3478 ;
3479
3480// ============================================================================
3481// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3482// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3483// in:
3484//
3485// int (*f())[10] { ... };
3486// ... (*f())[3] += 1; // definition mimics usage
3487//
3488// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3489// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3490// ============================================================================
3491
3492// ----------------------------------------------------------------------------
3493// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3494// to define a variable or function prototype, e.g.:
3495//
3496// valid declaration invalid definition
3497// ----------------- ------------------
3498// int f; int f {}
3499// int *f; int *f {}
3500// int f[10]; int f[10] {}
3501// int (*f)(int); int (*f)(int) {}
3502//
3503// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3504// variable_declarator and function_declarator.
3505// ----------------------------------------------------------------------------
3506
3507// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3508// declaring an array of functions versus a pointer to an array of functions.
3509
3510paren_identifier:
3511 identifier_at
3512 { $$ = DeclarationNode::newName( $1 ); }
3513 | '(' paren_identifier ')' // redundant parenthesis
3514 { $$ = $2; }
3515 ;
3516
3517variable_declarator:
3518 paren_identifier attribute_list_opt
3519 { $$ = $1->addQualifiers( $2 ); }
3520 | variable_ptr
3521 | variable_array attribute_list_opt
3522 { $$ = $1->addQualifiers( $2 ); }
3523 | variable_function attribute_list_opt
3524 { $$ = $1->addQualifiers( $2 ); }
3525 ;
3526
3527variable_ptr:
3528 ptrref_operator variable_declarator
3529 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3530 | ptrref_operator type_qualifier_list variable_declarator
3531 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3532 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3533 { $$ = $2->addQualifiers( $4 ); }
3534 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3535 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3536 ;
3537
3538variable_array:
3539 paren_identifier array_dimension
3540 { $$ = $1->addArray( $2 ); }
3541 | '(' variable_ptr ')' array_dimension
3542 { $$ = $2->addArray( $4 ); }
3543 | '(' attribute_list variable_ptr ')' array_dimension
3544 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3545 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3546 { $$ = $2->addArray( $4 ); }
3547 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3548 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3549 | '(' variable_array ')' // redundant parenthesis
3550 { $$ = $2; }
3551 | '(' attribute_list variable_array ')' // redundant parenthesis
3552 { $$ = $3->addQualifiers( $2 ); }
3553 ;
3554
3555variable_function:
3556 '(' variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3557 { $$ = $2->addParamList( $5 ); }
3558 | '(' attribute_list variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3559 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3560 | '(' variable_function ')' // redundant parenthesis
3561 { $$ = $2; }
3562 | '(' attribute_list variable_function ')' // redundant parenthesis
3563 { $$ = $3->addQualifiers( $2 ); }
3564 ;
3565
3566// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3567// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3568// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3569
3570function_declarator:
3571 function_no_ptr attribute_list_opt
3572 { $$ = $1->addQualifiers( $2 ); }
3573 | function_ptr
3574 | function_array attribute_list_opt
3575 { $$ = $1->addQualifiers( $2 ); }
3576 ;
3577
3578function_no_ptr:
3579 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3580 { $$ = $1->addParamList( $3 ); }
3581 | '(' function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3582 { $$ = $2->addParamList( $5 ); }
3583 | '(' attribute_list function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3584 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3585 | '(' function_no_ptr ')' // redundant parenthesis
3586 { $$ = $2; }
3587 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3588 { $$ = $3->addQualifiers( $2 ); }
3589 ;
3590
3591function_ptr:
3592 ptrref_operator function_declarator
3593 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3594 | ptrref_operator type_qualifier_list function_declarator
3595 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3596 | '(' function_ptr ')' attribute_list_opt
3597 { $$ = $2->addQualifiers( $4 ); }
3598 | '(' attribute_list function_ptr ')' attribute_list_opt
3599 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3600 ;
3601
3602function_array:
3603 '(' function_ptr ')' array_dimension
3604 { $$ = $2->addArray( $4 ); }
3605 | '(' attribute_list function_ptr ')' array_dimension
3606 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3607 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3608 { $$ = $2->addArray( $4 ); }
3609 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3610 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3611 | '(' function_array ')' // redundant parenthesis
3612 { $$ = $2; }
3613 | '(' attribute_list function_array ')' // redundant parenthesis
3614 { $$ = $3->addQualifiers( $2 ); }
3615 ;
3616
3617// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3618//
3619// f( a, b, c ) int a, *b, c[]; {}
3620//
3621// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3622// returning arrays and functions versus pointers to arrays and functions.
3623
3624KR_function_declarator:
3625 KR_function_no_ptr
3626 | KR_function_ptr
3627 | KR_function_array
3628 ;
3629
3630KR_function_no_ptr:
3631 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3632 { $$ = $1->addIdList( $3 ); }
3633 | '(' KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3634 { $$ = $2->addParamList( $5 ); }
3635 | '(' attribute_list KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3636 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3637 | '(' KR_function_no_ptr ')' // redundant parenthesis
3638 { $$ = $2; }
3639 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3640 { $$ = $3->addQualifiers( $2 ); }
3641 ;
3642
3643KR_function_ptr:
3644 ptrref_operator KR_function_declarator
3645 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3646 | ptrref_operator type_qualifier_list KR_function_declarator
3647 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3648 | '(' KR_function_ptr ')'
3649 { $$ = $2; }
3650 | '(' attribute_list KR_function_ptr ')'
3651 { $$ = $3->addQualifiers( $2 ); }
3652 ;
3653
3654KR_function_array:
3655 '(' KR_function_ptr ')' array_dimension
3656 { $$ = $2->addArray( $4 ); }
3657 | '(' attribute_list KR_function_ptr ')' array_dimension
3658 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3659 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3660 { $$ = $2->addArray( $4 ); }
3661 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3662 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3663 | '(' KR_function_array ')' // redundant parenthesis
3664 { $$ = $2; }
3665 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3666 { $$ = $3->addQualifiers( $2 ); }
3667 ;
3668
3669// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3670//
3671// typedef int foo;
3672// {
3673// int foo; // redefine typedef name in new scope
3674// }
3675
3676paren_type:
3677 typedef_name
3678 {
3679 // hide type name in enclosing scope by variable name
3680 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3681 }
3682 | '(' paren_type ')'
3683 { $$ = $2; }
3684 ;
3685
3686variable_type_redeclarator:
3687 paren_type attribute_list_opt
3688 { $$ = $1->addQualifiers( $2 ); }
3689 | variable_type_ptr
3690 | variable_type_array attribute_list_opt
3691 { $$ = $1->addQualifiers( $2 ); }
3692 | variable_type_function attribute_list_opt
3693 { $$ = $1->addQualifiers( $2 ); }
3694 ;
3695
3696variable_type_ptr:
3697 ptrref_operator variable_type_redeclarator
3698 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3699 | ptrref_operator type_qualifier_list variable_type_redeclarator
3700 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3701 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3702 { $$ = $2->addQualifiers( $4 ); }
3703 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3704 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3705 ;
3706
3707variable_type_array:
3708 paren_type array_dimension
3709 { $$ = $1->addArray( $2 ); }
3710 | '(' variable_type_ptr ')' array_dimension
3711 { $$ = $2->addArray( $4 ); }
3712 | '(' attribute_list variable_type_ptr ')' array_dimension
3713 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3714 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3715 { $$ = $2->addArray( $4 ); }
3716 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3717 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3718 | '(' variable_type_array ')' // redundant parenthesis
3719 { $$ = $2; }
3720 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3721 { $$ = $3->addQualifiers( $2 ); }
3722 ;
3723
3724variable_type_function:
3725 '(' variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3726 { $$ = $2->addParamList( $5 ); }
3727 | '(' attribute_list variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3728 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3729 | '(' variable_type_function ')' // redundant parenthesis
3730 { $$ = $2; }
3731 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3732 { $$ = $3->addQualifiers( $2 ); }
3733 ;
3734
3735// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3736// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3737// arrays and functions.
3738
3739function_type_redeclarator:
3740 function_type_no_ptr attribute_list_opt
3741 { $$ = $1->addQualifiers( $2 ); }
3742 | function_type_ptr
3743 | function_type_array attribute_list_opt
3744 { $$ = $1->addQualifiers( $2 ); }
3745 ;
3746
3747function_type_no_ptr:
3748 paren_type '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3749 { $$ = $1->addParamList( $3 ); }
3750 | '(' function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3751 { $$ = $2->addParamList( $5 ); }
3752 | '(' attribute_list function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3753 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3754 | '(' function_type_no_ptr ')' // redundant parenthesis
3755 { $$ = $2; }
3756 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3757 { $$ = $3->addQualifiers( $2 ); }
3758 ;
3759
3760function_type_ptr:
3761 ptrref_operator function_type_redeclarator
3762 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3763 | ptrref_operator type_qualifier_list function_type_redeclarator
3764 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3765 | '(' function_type_ptr ')' attribute_list_opt
3766 { $$ = $2->addQualifiers( $4 ); }
3767 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3768 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3769 ;
3770
3771function_type_array:
3772 '(' function_type_ptr ')' array_dimension
3773 { $$ = $2->addArray( $4 ); }
3774 | '(' attribute_list function_type_ptr ')' array_dimension
3775 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3776 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3777 { $$ = $2->addArray( $4 ); }
3778 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3779 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3780 | '(' function_type_array ')' // redundant parenthesis
3781 { $$ = $2; }
3782 | '(' attribute_list function_type_array ')' // redundant parenthesis
3783 { $$ = $3->addQualifiers( $2 ); }
3784 ;
3785
3786// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3787// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3788// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3789// pointers to arrays and functions.
3790
3791identifier_parameter_declarator:
3792 paren_identifier attribute_list_opt
3793 { $$ = $1->addQualifiers( $2 ); }
3794 | '&' MUTEX paren_identifier attribute_list_opt
3795 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3796 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3797 | identifier_parameter_ptr
3798 | identifier_parameter_array attribute_list_opt
3799 { $$ = $1->addQualifiers( $2 ); }
3800 | identifier_parameter_function attribute_list_opt
3801 { $$ = $1->addQualifiers( $2 ); }
3802 ;
3803
3804identifier_parameter_ptr:
3805 ptrref_operator identifier_parameter_declarator
3806 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3807 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3808 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3809 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3810 { $$ = $2->addQualifiers( $4 ); }
3811 ;
3812
3813identifier_parameter_array:
3814 paren_identifier array_parameter_dimension
3815 { $$ = $1->addArray( $2 ); }
3816 | '(' identifier_parameter_ptr ')' array_dimension
3817 { $$ = $2->addArray( $4 ); }
3818 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3819 { $$ = $2->addArray( $4 ); }
3820 | '(' identifier_parameter_array ')' // redundant parenthesis
3821 { $$ = $2; }
3822 ;
3823
3824identifier_parameter_function:
3825 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3826 { $$ = $1->addParamList( $3 ); }
3827 | '(' identifier_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3828 { $$ = $2->addParamList( $5 ); }
3829 | '(' identifier_parameter_function ')' // redundant parenthesis
3830 { $$ = $2; }
3831 ;
3832
3833// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3834// e.g.:
3835//
3836// typedef int foo;
3837// forall( otype T ) struct foo;
3838// int f( int foo ); // redefine typedef name in new scope
3839//
3840// and allows the C99 array options, which can only appear in a parameter list.
3841
3842type_parameter_redeclarator:
3843 typedef_name attribute_list_opt
3844 { $$ = $1->addQualifiers( $2 ); }
3845 | '&' MUTEX typedef_name attribute_list_opt
3846 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3847 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3848 | type_parameter_ptr
3849 | type_parameter_array attribute_list_opt
3850 { $$ = $1->addQualifiers( $2 ); }
3851 | type_parameter_function attribute_list_opt
3852 { $$ = $1->addQualifiers( $2 ); }
3853 ;
3854
3855typedef_name:
3856 TYPEDEFname
3857 { $$ = DeclarationNode::newName( $1 ); }
3858 | TYPEGENname
3859 { $$ = DeclarationNode::newName( $1 ); }
3860 ;
3861
3862type_parameter_ptr:
3863 ptrref_operator type_parameter_redeclarator
3864 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3865 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3866 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3867 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3868 { $$ = $2->addQualifiers( $4 ); }
3869 ;
3870
3871type_parameter_array:
3872 typedef_name array_parameter_dimension
3873 { $$ = $1->addArray( $2 ); }
3874 | '(' type_parameter_ptr ')' array_parameter_dimension
3875 { $$ = $2->addArray( $4 ); }
3876 ;
3877
3878type_parameter_function:
3879 typedef_name '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3880 { $$ = $1->addParamList( $3 ); }
3881 | '(' type_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3882 { $$ = $2->addParamList( $5 ); }
3883 ;
3884
3885// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3886// which the type applies, e.g.:
3887//
3888// sizeof( int );
3889// sizeof( int * );
3890// sizeof( int [10] );
3891// sizeof( int (*)() );
3892// sizeof( int () );
3893//
3894// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3895// and functions versus pointers to arrays and functions.
3896
3897abstract_declarator:
3898 abstract_ptr
3899 | abstract_array attribute_list_opt
3900 { $$ = $1->addQualifiers( $2 ); }
3901 | abstract_function attribute_list_opt
3902 { $$ = $1->addQualifiers( $2 ); }
3903 ;
3904
3905abstract_ptr:
3906 ptrref_operator
3907 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3908 | ptrref_operator type_qualifier_list
3909 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3910 | ptrref_operator abstract_declarator
3911 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3912 | ptrref_operator type_qualifier_list abstract_declarator
3913 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3914 | '(' abstract_ptr ')' attribute_list_opt
3915 { $$ = $2->addQualifiers( $4 ); }
3916 ;
3917
3918abstract_array:
3919 array_dimension
3920 | '(' abstract_ptr ')' array_dimension
3921 { $$ = $2->addArray( $4 ); }
3922 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3923 { $$ = $2->addArray( $4 ); }
3924 | '(' abstract_array ')' // redundant parenthesis
3925 { $$ = $2; }
3926 ;
3927
3928abstract_function:
3929 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3930 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3931 | '(' abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3932 { $$ = $2->addParamList( $5 ); }
3933 | '(' abstract_function ')' // redundant parenthesis
3934 { $$ = $2; }
3935 ;
3936
3937array_dimension:
3938 // Only the first dimension can be empty.
3939 '[' ']'
3940 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3941 | '[' ']' multi_array_dimension
3942 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3943 // Cannot use constant_expression because of tuples => semantic check
3944 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3945 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3946 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3947
3948 // If needed, the following parses and does not use comma_expression, so the array structure can be built.
3949 // | '[' push assignment_expression pop ',' push array_dimension_list pop ']' // CFA
3950
3951 | '[' push array_type_list pop ']' // CFA
3952 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3953 | multi_array_dimension
3954 ;
3955
3956// array_dimension_list:
3957// assignment_expression
3958// | array_dimension_list ',' assignment_expression
3959// ;
3960
3961array_type_list:
3962 basic_type_name
3963 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3964 | type_name
3965 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3966 | assignment_expression upupeq assignment_expression
3967 | array_type_list ',' basic_type_name
3968 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3969 | array_type_list ',' type_name
3970 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3971 | array_type_list ',' assignment_expression upupeq assignment_expression
3972 ;
3973
3974upupeq:
3975 '~'
3976 { $$ = OperKinds::LThan; }
3977 | ErangeUpEq
3978 { $$ = OperKinds::LEThan; }
3979 ;
3980
3981multi_array_dimension:
3982 '[' push assignment_expression pop ']'
3983 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3984 | '[' push '*' pop ']' // C99
3985 { $$ = DeclarationNode::newVarArray( 0 ); }
3986 | multi_array_dimension '[' push assignment_expression pop ']'
3987 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
3988 | multi_array_dimension '[' push '*' pop ']' // C99
3989 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3990 ;
3991
3992// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3993// identifier to which the type applies, e.g.:
3994//
3995// int f( int ); // not handled here
3996// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3997// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3998// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3999//
4000// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
4001// and functions versus pointers to arrays and functions. In addition, the pattern handles the
4002// special meaning of parenthesis around a typedef name:
4003//
4004// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
4005// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
4006// not as redundant parentheses around the identifier."
4007//
4008// For example:
4009//
4010// typedef float T;
4011// int f( int ( T [5] ) ); // see abstract_parameter_declarator
4012// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
4013// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
4014// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
4015//
4016// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
4017// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
4018// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
4019// functions.
4020
4021abstract_parameter_declarator_opt:
4022 // empty
4023 { $$ = nullptr; }
4024 | abstract_parameter_declarator
4025 ;
4026
4027abstract_parameter_declarator:
4028 abstract_parameter_ptr
4029 | '&' MUTEX attribute_list_opt
4030 { $$ = DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ), OperKinds::AddressOf )->addQualifiers( $3 ); }
4031 | abstract_parameter_array attribute_list_opt
4032 { $$ = $1->addQualifiers( $2 ); }
4033 | abstract_parameter_function attribute_list_opt
4034 { $$ = $1->addQualifiers( $2 ); }
4035 ;
4036
4037abstract_parameter_ptr:
4038 ptrref_operator
4039 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4040 | ptrref_operator type_qualifier_list
4041 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4042 | ptrref_operator abstract_parameter_declarator
4043 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4044 | ptrref_operator type_qualifier_list abstract_parameter_declarator
4045 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4046 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
4047 { $$ = $2->addQualifiers( $4 ); }
4048 ;
4049
4050abstract_parameter_array:
4051 array_parameter_dimension
4052 | '(' abstract_parameter_ptr ')' array_parameter_dimension
4053 { $$ = $2->addArray( $4 ); }
4054 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
4055 { $$ = $2->addArray( $4 ); }
4056 | '(' abstract_parameter_array ')' // redundant parenthesis
4057 { $$ = $2; }
4058 ;
4059
4060abstract_parameter_function:
4061 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4062 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
4063 | '(' abstract_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4064 { $$ = $2->addParamList( $5 ); }
4065 | '(' abstract_parameter_function ')' // redundant parenthesis
4066 { $$ = $2; }
4067 ;
4068
4069array_parameter_dimension:
4070 // Only the first dimension can be empty or have qualifiers.
4071 array_parameter_1st_dimension
4072 | array_parameter_1st_dimension multi_array_dimension
4073 { $$ = $1->addArray( $2 ); }
4074 | multi_array_dimension
4075 ;
4076
4077// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
4078//
4079// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
4080// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
4081
4082array_parameter_1st_dimension:
4083 '[' ']'
4084 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
4085 // multi_array_dimension handles the '[' '*' ']' case
4086 | '[' push type_qualifier_list '*' pop ']' // remaining C99
4087 { $$ = DeclarationNode::newVarArray( $3 ); }
4088 | '[' push type_qualifier_list pop ']'
4089 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
4090 // multi_array_dimension handles the '[' assignment_expression ']' case
4091 | '[' push type_qualifier_list assignment_expression pop ']'
4092 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4093 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
4094 { $$ = DeclarationNode::newArray( $5, $4, true ); }
4095 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
4096 { $$ = DeclarationNode::newArray( $5, $3, true ); }
4097 ;
4098
4099// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
4100//
4101// struct S {
4102// int;
4103// int *;
4104// int [10];
4105// int (*)();
4106// };
4107
4108variable_abstract_declarator:
4109 variable_abstract_ptr
4110 | variable_abstract_array attribute_list_opt
4111 { $$ = $1->addQualifiers( $2 ); }
4112 | variable_abstract_function attribute_list_opt
4113 { $$ = $1->addQualifiers( $2 ); }
4114 ;
4115
4116variable_abstract_ptr:
4117 ptrref_operator
4118 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4119 | ptrref_operator type_qualifier_list
4120 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4121 | ptrref_operator variable_abstract_declarator
4122 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4123 | ptrref_operator type_qualifier_list variable_abstract_declarator
4124 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4125 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4126 { $$ = $2->addQualifiers( $4 ); }
4127 ;
4128
4129variable_abstract_array:
4130 array_dimension
4131 | '(' variable_abstract_ptr ')' array_dimension
4132 { $$ = $2->addArray( $4 ); }
4133 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4134 { $$ = $2->addArray( $4 ); }
4135 | '(' variable_abstract_array ')' // redundant parenthesis
4136 { $$ = $2; }
4137 ;
4138
4139variable_abstract_function:
4140 '(' variable_abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4141 { $$ = $2->addParamList( $5 ); }
4142 | '(' variable_abstract_function ')' // redundant parenthesis
4143 { $$ = $2; }
4144 ;
4145
4146// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4147// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4148
4149cfa_identifier_parameter_declarator_tuple: // CFA
4150 cfa_identifier_parameter_declarator_no_tuple
4151 | cfa_abstract_tuple
4152 | type_qualifier_list cfa_abstract_tuple
4153 { $$ = $2->addQualifiers( $1 ); }
4154 ;
4155
4156cfa_identifier_parameter_declarator_no_tuple: // CFA
4157 cfa_identifier_parameter_ptr
4158 | cfa_identifier_parameter_array
4159 ;
4160
4161cfa_identifier_parameter_ptr: // CFA
4162 // No SUE declaration in parameter list.
4163 ptrref_operator type_specifier_nobody
4164 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4165 | type_qualifier_list ptrref_operator type_specifier_nobody
4166 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4167 | ptrref_operator cfa_abstract_function
4168 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4169 | type_qualifier_list ptrref_operator cfa_abstract_function
4170 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4171 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4172 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4173 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4174 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4175 ;
4176
4177cfa_identifier_parameter_array: // CFA
4178 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4179 // shift/reduce conflict with new-style empty (void) function return type.
4180 '[' ']' type_specifier_nobody
4181 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4182 | cfa_array_parameter_1st_dimension type_specifier_nobody
4183 { $$ = $2->addNewArray( $1 ); }
4184 | '[' ']' multi_array_dimension type_specifier_nobody
4185 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4186 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4187 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4188 | multi_array_dimension type_specifier_nobody
4189 { $$ = $2->addNewArray( $1 ); }
4190
4191 | '[' ']' cfa_identifier_parameter_ptr
4192 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4193 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4194 { $$ = $2->addNewArray( $1 ); }
4195 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4196 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4197 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4198 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4199 | multi_array_dimension cfa_identifier_parameter_ptr
4200 { $$ = $2->addNewArray( $1 ); }
4201 ;
4202
4203cfa_array_parameter_1st_dimension:
4204 '[' push type_qualifier_list '*' pop ']' // remaining C99
4205 { $$ = DeclarationNode::newVarArray( $3 ); }
4206 | '[' push type_qualifier_list assignment_expression pop ']'
4207 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4208 | '[' push declaration_qualifier_list assignment_expression pop ']'
4209 // declaration_qualifier_list must be used because of shift/reduce conflict with
4210 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4211 // appear in this context.
4212 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4213 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4214 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4215 ;
4216
4217// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4218// identifier to which the type applies, e.g.:
4219//
4220// [int] f( int ); // abstract variable parameter; no parameter name specified
4221// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4222//
4223// These rules need LR(3):
4224//
4225// cfa_abstract_tuple identifier_or_type_name
4226// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
4227//
4228// since a function return type can be syntactically identical to a tuple type:
4229//
4230// [int, int] t;
4231// [int, int] f( int );
4232//
4233// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4234// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4235// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4236// duplicated when appearing with cfa_function_specifier.
4237
4238cfa_abstract_declarator_tuple: // CFA
4239 cfa_abstract_tuple
4240 | type_qualifier_list cfa_abstract_tuple
4241 { $$ = $2->addQualifiers( $1 ); }
4242 | cfa_abstract_declarator_no_tuple
4243 ;
4244
4245cfa_abstract_declarator_no_tuple: // CFA
4246 cfa_abstract_ptr
4247 | cfa_abstract_array
4248 ;
4249
4250cfa_abstract_ptr: // CFA
4251 ptrref_operator type_specifier
4252 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4253 | type_qualifier_list ptrref_operator type_specifier
4254 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4255 | ptrref_operator cfa_abstract_function
4256 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4257 | type_qualifier_list ptrref_operator cfa_abstract_function
4258 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4259 | ptrref_operator cfa_abstract_declarator_tuple
4260 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4261 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4262 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4263 ;
4264
4265cfa_abstract_array: // CFA
4266 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4267 // empty (void) function return type.
4268 '[' ']' type_specifier
4269 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4270 | '[' ']' multi_array_dimension type_specifier
4271 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4272 | multi_array_dimension type_specifier
4273 { $$ = $2->addNewArray( $1 ); }
4274 | '[' ']' cfa_abstract_ptr
4275 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4276 | '[' ']' multi_array_dimension cfa_abstract_ptr
4277 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4278 | multi_array_dimension cfa_abstract_ptr
4279 { $$ = $2->addNewArray( $1 ); }
4280 ;
4281
4282cfa_abstract_tuple: // CFA
4283 '[' push cfa_abstract_parameter_list pop ']'
4284 { $$ = DeclarationNode::newTuple( $3 ); }
4285 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4286 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4287 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4288 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4289 ;
4290
4291cfa_abstract_function: // CFA
4292 '[' ']' '(' cfa_parameter_list_ellipsis_opt ')'
4293 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4294 | cfa_abstract_tuple '(' push cfa_parameter_list_ellipsis_opt pop ')'
4295 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4296 | cfa_function_return '(' push cfa_parameter_list_ellipsis_opt pop ')'
4297 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4298 ;
4299
4300// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4301// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4302//
4303// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4304// the declaration specifiers in a declaration is an obsolescent feature."
4305//
4306// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4307// prototype-format parameter type declarators) is an obsolescent feature."
4308//
4309// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4310// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4311
4312// ************************ MISCELLANEOUS ********************************
4313
4314comma_opt: // redundant comma
4315 // empty
4316 | ','
4317 ;
4318
4319default_initializer_opt:
4320 // empty
4321 { $$ = nullptr; }
4322 | '=' assignment_expression
4323 { $$ = $2; }
4324 ;
4325
4326%%
4327
4328// ----end of grammar----
4329
4330// Local Variables: //
4331// mode: c++ //
4332// tab-width: 4 //
4333// compile-command: "bison -Wcounterexamples parser.yy" //
4334// End: //
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