source: src/Parser/parser.yy@ cf191ac

Last change on this file since cf191ac was 7a780ad, checked in by Andrew Beach <ajbeach@…>, 18 months ago

Moved ast::BasicType::Kind to ast::BasicKind in its own hearder. This is more consistent with other utility enums (although we still use this as a enum class) and reduces what some files need to include. Also did a upgrade in a comment with MAX_INTEGER_TYPE, it is now part of the enum.
  • Property mode set to 100644
File size: 176.3 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 : Sat Mar 16 18:19:23 2024
13// Update Count : 6617
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 "AST/Type.hpp" // for BasicType, BasicKind
58#include "Common/SemanticError.h" // error_str
59#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
60
61// lex uses __null in a boolean context, it's fine.
62#ifdef __clang__
63#pragma GCC diagnostic ignored "-Wparentheses-equality"
64#endif
65
66extern DeclarationNode * parseTree;
67extern ast::Linkage::Spec linkage;
68extern TypedefTable typedefTable;
69
70stack<ast::Linkage::Spec> linkageStack;
71
72bool appendStr( string & to, string & from ) {
73 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
74 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
75 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
76 // easier to let the C compiler handle this case.
77 //
78 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
79 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
80 // e.g., u"a" U"b" L"c" is disallowed.
81
82 if ( from[0] != '"' ) { // encoding ?
83 if ( to[0] != '"' ) { // encoding ?
84 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
85 yyerror( "non-matching string encodings for string-literal concatenation" );
86 return false; // parse error, must call YYERROR in action
87 } else if ( from[1] == '8' ) {
88 from.erase( 0, 1 ); // remove 2nd encoding
89 } // if
90 } else {
91 if ( from[1] == '8' ) { // move encoding to start
92 to = "u8" + to;
93 from.erase( 0, 1 ); // remove 2nd encoding
94 } else {
95 to = from[0] + to;
96 } // if
97 } // if
98 from.erase( 0, 1 ); // remove 2nd encoding
99 } // if
100 to += " " + from; // concatenated into single string
101 return true;
102} // appendStr
103
104DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
105 // Distribute type specifier across all declared variables, e.g., static, const, __attribute__.
106 assert( declList );
107
108 // Do not distribute attributes for aggregates because the attributes surrounding the aggregate belong it not the
109 // variables in the declaration list, e.g.,
110 //
111 // struct __attribute__(( aligned(128) )) S { ...
112 // } v1 __attribute__(( aligned(64) )), v2 __attribute__(( aligned(32) )), v3;
113 // struct S v4;
114 //
115 // v1 => 64, v2 =>32, v3 => 128, v2 => 128
116 //
117 // Anonymous aggregates are a special case because there is no aggregate to bind the attribute to; hence it floats
118 // to the declaration list.
119 //
120 // struct __attribute__(( aligned(128) )) /*anonymous */ { ... } v1;
121 //
122 // v1 => 128
123
124 bool copyattr = ! (typeSpec->type && typeSpec->type->kind == TypeData::Aggregate && ! typeSpec->type->aggregate.anon );
125
126 // addType copies the type information for the aggregate instances from typeSpec into cl's aggInst.aggregate.
127 DeclarationNode * cl = (new DeclarationNode)->addType( typeSpec ); // typeSpec IS DELETED!!!
128
129 // Start at second variable in declaration list and clone the type specifiers for each variable.
130 for ( DeclarationNode * cur = declList->next ; cur != nullptr; cur = cur->next ) {
131 cl->cloneBaseType( cur, copyattr ); // cur is modified
132 } // for
133
134 // Add first variable in declaration list with hidden type information in aggInst.aggregate, which is used by
135 // extractType to recover the type for the aggregate instances.
136 declList->addType( cl, copyattr ); // cl IS DELETED!!!
137 return declList;
138} // distAttr
139
140void distExt( DeclarationNode * declaration ) {
141 // distribute EXTENSION across all declarations
142 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
143 iter->set_extension( true );
144 } // for
145} // distExt
146
147void distInl( DeclarationNode * declaration ) {
148 // distribute INLINE across all declarations
149 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
150 iter->set_inLine( true );
151 } // for
152} // distInl
153
154void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
155 // distribute qualifiers across all non-variable declarations in a distribution statemement
156 for ( DeclarationNode * iter = declaration ; iter != nullptr ; iter = iter->next ) {
157 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
158 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
159 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
160 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
161 DeclarationNode * clone = qualifiers->clone();
162 if ( qualifiers->type ) { // forall clause ? (handles SC)
163 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
164 swap( clone->type->forall, iter->type->aggregate.params );
165 iter->addQualifiers( clone );
166 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
167 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
168 DeclarationNode newnode;
169 swap( newnode.type, iter->type->aggInst.aggregate );
170 swap( clone->type->forall, newnode.type->aggregate.params );
171 newnode.addQualifiers( clone );
172 swap( newnode.type, iter->type->aggInst.aggregate );
173 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
174 swap( clone->type->forall, iter->type->forall );
175 iter->addQualifiers( clone );
176 } // if
177 } else { // just SC qualifiers
178 iter->addQualifiers( clone );
179 } // if
180 } // for
181 delete qualifiers;
182} // distQual
183
184// There is an ambiguity for inline generic-routine return-types and generic routines.
185// forall( otype T ) struct S { int i; } bar( T ) {}
186// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
187// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
188// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
189// forall( otype T ) struct S { int T; };
190// forall( otype W ) bar( W ) {}
191
192void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
193 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
194 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
195 declSpec->type->aggregate.params = nullptr;
196 } // if
197} // rebindForall
198
199string * build_postfix_name( string * name ) {
200 *name = string("__postfix_func_") + *name;
201 return name;
202} // build_postfix_name
203
204DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
205 if ( nullptr == fieldList ) {
206 if ( !( typeSpec->type && typeSpec->type->kind == TypeData::Aggregate ) ) {
207 stringstream ss;
208 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
209 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
210 return nullptr;
211 } // if
212 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
213 fieldList = DeclarationNode::newName( nullptr );
214 } // if
215
216 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
217 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
218 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
219 return temp;
220} // fieldDecl
221
222#define NEW_ZERO new ExpressionNode( build_constantInteger( yylloc, *new string( "0" ) ) )
223#define NEW_ONE new ExpressionNode( build_constantInteger( yylloc, *new string( "1" ) ) )
224#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
225#define MISSING_ANON_FIELD "syntax error, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
226#define MISSING_LOW "syntax error, missing low value for up-to range so index is uninitialized."
227#define MISSING_HIGH "syntax error, missing high value for down-to range so index is uninitialized."
228
229static ForCtrl * makeForCtrl(
230 const CodeLocation & location,
231 DeclarationNode * init,
232 enum OperKinds compop,
233 ExpressionNode * comp,
234 ExpressionNode * inc ) {
235 // Wrap both comp/inc if they are non-null.
236 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
237 compop,
238 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
239 comp ) );
240 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
241 // choose += or -= for upto/downto
242 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
243 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
244 inc ) );
245 // The StatementNode call frees init->name, it must happen later.
246 return new ForCtrl( new StatementNode( init ), comp, inc );
247}
248
249ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
250 if ( index->initializer ) {
251 SemanticError( yylloc, "syntax error, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
252 } // if
253 if ( index->next ) {
254 SemanticError( yylloc, "syntax error, multiple loop indexes disallowed in for-loop declaration." );
255 } // if
256 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
257 return makeForCtrl( location, initDecl, compop, comp, inc );
258} // forCtrl
259
260ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
261 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
262 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
263 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicKind::SignedInt ) ) );
264 } // if
265 DeclarationNode * initDecl = distAttr(
266 DeclarationNode::newTypeof( type, true ),
267 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
268 );
269 return makeForCtrl( location, initDecl, compop, comp, inc );
270} // forCtrl
271
272ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
273 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
274 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
275 } else if ( auto commaExpr = dynamic_cast<ast::CommaExpr *>( index->expr.get() ) ) {
276 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
277 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
278 } else {
279 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
280 } // if
281 } else {
282 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
283 } // if
284} // forCtrl
285
286static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
287 SemanticError( yylloc, "syntax error, adjacent identifiers \"%s\" and \"%s\" are not meaningful in an %s.\n"
288 "Possible cause is misspelled type name or missing generic parameter.",
289 identifier1.c_str(), identifier2.c_str(), kind );
290} // IdentifierBeforeIdentifier
291
292static void IdentifierBeforeType( string & identifier, const char * kind ) {
293 SemanticError( yylloc, "syntax error, identifier \"%s\" cannot appear before a %s.\n"
294 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter.",
295 identifier.c_str(), kind );
296} // IdentifierBeforeType
297
298bool forall = false; // aggregate have one or more forall qualifiers ?
299
300// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
301#define YYLLOC_DEFAULT(Cur, Rhs, N) \
302if ( N ) { \
303 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
304 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
305 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
306 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
307 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
308} else { \
309 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
310 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
311 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
312}
313%}
314
315%define parse.error verbose
316
317// Types declaration for productions
318
319%union {
320 // A raw token can be used.
321 Token tok;
322
323 // The general node types hold some generic node or list of nodes.
324 DeclarationNode * decl;
325 InitializerNode * init;
326 ExpressionNode * expr;
327 StatementNode * stmt;
328 ClauseNode * clause;
329 TypeData * type;
330
331 // Special "nodes" containing compound information.
332 CondCtl * ifctl;
333 ForCtrl * forctl;
334 LabelNode * labels;
335
336 // Various flags and single values that become fields later.
337 ast::AggregateDecl::Aggregate aggKey;
338 ast::TypeDecl::Kind tclass;
339 OperKinds oper;
340 bool is_volatile;
341 EnumHiding enum_hiding;
342 ast::ExceptionKind except_kind;
343 // String passes ownership with it.
344 std::string * str;
345
346 // Narrower node types are used to avoid constant unwrapping.
347 ast::WaitForStmt * wfs;
348 ast::WaitUntilStmt::ClauseNode * wucn;
349 ast::GenericExpr * genexpr;
350}
351
352// ************************ TERMINAL TOKENS ********************************
353
354// keywords
355%token TYPEDEF
356%token EXTERN STATIC AUTO REGISTER
357%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
358%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
359%token NORETURN // C11
360%token CONST VOLATILE
361%token RESTRICT // C99
362%token ATOMIC // C11
363%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
364%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
365%token BOOL COMPLEX IMAGINARY // C99
366%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
367%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
368%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
369%token ZERO_T ONE_T // CFA
370%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE // GCC
371%token OFFSETOF BASETYPEOF TYPEID // CFA
372%token ENUM STRUCT UNION
373%token EXCEPTION // CFA
374%token GENERATOR COROUTINE MONITOR THREAD // CFA
375%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
376// %token RESUME // CFA
377%token LABEL // GCC
378%token SUSPEND // CFA
379%token ATTRIBUTE EXTENSION // GCC
380%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
381%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
382%token CORUN COFOR
383%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
384%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
385%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
386
387// names and constants: lexer differentiates between identifier and typedef names
388%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
389%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
390%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
391%token<tok> DIRECTIVE
392// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
393// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
394// converted into the tuple index (.)(1). e.g., 3.x
395%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
396
397// multi-character operators
398%token ARROW // ->
399%token ICR DECR // ++ --
400%token LS RS // << >>
401%token LE GE EQ NE // <= >= == !=
402%token ANDAND OROR // && ||
403%token ATTR ELLIPSIS // @@ ...
404
405%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
406%token PLUSassign MINUSassign // += -=
407%token LSassign RSassign // <<= >>=
408%token ANDassign ERassign ORassign // &= ^= |=
409
410%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
411%token ATassign // @=
412
413%type<tok> identifier identifier_at identifier_or_type_name attr_name
414%type<tok> quasi_keyword
415%type<expr> string_literal
416%type<str> string_literal_list
417
418%type<enum_hiding> hide_opt visible_hide_opt
419
420// expressions
421%type<expr> constant
422%type<expr> tuple tuple_expression_list
423%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
424%type<expr> primary_expression postfix_expression unary_expression
425%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
426%type<expr> shift_expression relational_expression equality_expression
427%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
428%type<expr> logical_AND_expression logical_OR_expression
429%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
430%type<expr> comma_expression comma_expression_opt
431%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
432%type<ifctl> conditional_declaration
433%type<forctl> for_control_expression for_control_expression_list
434%type<oper> upupeq updown updowneq downupdowneq
435%type<expr> subrange
436%type<decl> asm_name_opt
437%type<expr> asm_operands_opt asm_operands_list asm_operand
438%type<labels> label_list
439%type<expr> asm_clobbers_list_opt
440%type<is_volatile> asm_volatile_opt
441%type<expr> handler_predicate_opt
442%type<genexpr> generic_association generic_assoc_list
443
444// statements
445%type<stmt> statement labeled_statement compound_statement
446%type<stmt> statement_decl statement_decl_list statement_list_nodecl
447%type<stmt> selection_statement
448%type<clause> switch_clause_list_opt switch_clause_list
449%type<expr> case_value
450%type<clause> case_clause case_value_list case_label case_label_list
451%type<stmt> iteration_statement jump_statement
452%type<stmt> expression_statement asm_statement
453%type<stmt> with_statement
454%type<expr> with_clause_opt
455%type<stmt> corun_statement cofor_statement
456%type<stmt> exception_statement
457%type<clause> handler_clause finally_clause
458%type<except_kind> handler_key
459%type<stmt> mutex_statement
460%type<expr> when_clause when_clause_opt waitfor waituntil timeout
461%type<stmt> waitfor_statement waituntil_statement
462%type<wfs> wor_waitfor_clause
463%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
464
465// declarations
466%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
467%type<decl> abstract_parameter_declarator_opt abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
468%type<decl> abstract_parameter_declaration
469
470%type<aggKey> aggregate_key aggregate_data aggregate_control
471%type<decl> aggregate_type aggregate_type_nobody
472
473%type<decl> assertion assertion_list assertion_list_opt
474
475%type<expr> bit_subrange_size_opt bit_subrange_size
476
477%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
478%type<type> basic_type_name_type
479%type<type> vtable vtable_opt default_opt
480
481%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
482
483%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
484%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
485
486%type<decl> elaborated_type elaborated_type_nobody
487
488%type<decl> enumerator_list enum_type enum_type_nobody enumerator_type
489%type<init> enumerator_value_opt
490
491%type<decl> external_definition external_definition_list external_definition_list_opt
492
493%type<decl> exception_declaration
494
495%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
496%type<expr> field field_name_list field_name fraction_constants_opt
497
498%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
499
500%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
501%type<decl> identifier_list
502
503%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
504%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
505%type<decl> cfa_abstract_ptr cfa_abstract_tuple
506
507%type<decl> cfa_array_parameter_1st_dimension
508
509%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
510%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
511
512%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
513%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
514
515%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_list_ellipsis_opt
516
517%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
518
519%type<decl> c_declaration static_assert
520%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
521%type<decl> KR_parameter_list KR_parameter_list_opt
522
523%type<decl> parameter_declaration parameter_list parameter_list_ellipsis_opt
524
525%type<decl> paren_identifier paren_type
526
527%type<decl> storage_class storage_class_list
528
529%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
530
531%type<tclass> type_class new_type_class
532%type<decl> type_declarator type_declarator_name type_declaring_list
533
534%type<decl> type_declaration_specifier type_type_specifier
535%type<type> type_name typegen_name
536%type<decl> typedef_name typedef_declaration typedef_expression
537
538%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
539%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
540
541%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
542
543%type<decl> type type_no_function
544%type<decl> type_parameter type_parameter_list type_initializer_opt
545
546%type<expr> type_parameters_opt type_list array_type_list // array_dimension_list
547
548%type<decl> type_qualifier forall type_qualifier_list_opt type_qualifier_list
549%type<type> type_qualifier_name
550%type<decl> type_specifier type_specifier_nobody
551
552%type<decl> variable_declarator variable_ptr variable_array variable_function
553%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
554
555%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
556
557// initializers
558%type<init> initializer initializer_list_opt initializer_opt
559
560// designators
561%type<expr> designator designator_list designation
562
563
564// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
565// .---------. matches IF '(' comma_expression ')' statement . (reduce)
566// if ( C ) S1 else S2
567// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
568// Similar issues exit with the waitfor statement.
569
570// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
571// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
572%precedence THEN // rule precedence for IF/WAITFOR statement
573%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
574%precedence WAND // token precedence for start of WAND in WAITFOR statement
575%precedence OROR // token precedence for start of WOR in WAITFOR statement
576%precedence WOR // token precedence for start of WOR in WAITFOR statement
577%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
578%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
579%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
580%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
581%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
582%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
583%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
584
585
586// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
587// forall( otype T ) struct Foo { T v; };
588// .-----. matches pointer to function returning a generic (which is impossible without a type)
589// Foo ( *fp )( int );
590// `---' matches start of TYPEGENname '('
591// must be:
592// Foo( int ) ( *fp )( int );
593// The same problem occurs here:
594// forall( otype T ) struct Foo { T v; } ( *fp )( int );
595// must be:
596// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
597
598// Order of these lines matters (low-to-high precedence).
599%precedence TYPEGENname
600%precedence '}'
601%precedence '('
602
603// %precedence RESUME
604// %precedence '{'
605// %precedence ')'
606
607%locations // support location tracking for error messages
608
609%start translation_unit // parse-tree root
610
611%%
612// ************************ Namespace Management ********************************
613
614// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
615// which are lexically identical.
616//
617// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
618// foo f; // to allow it to appear in this context
619//
620// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
621// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
622// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
623// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
624// must be distinguished by the lexical scanner.
625//
626// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
627// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
628// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
629// each context that introduces a name scope, a new level is created in the type table and that level is popped on
630// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
631// This requires distinguishing between type names that are local to the current declaration scope and those that
632// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
633//
634// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
635// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
636// around the list separator.
637//
638// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
639// push pop push pop
640
641push:
642 { typedefTable.enterScope(); }
643 ;
644
645pop:
646 { typedefTable.leaveScope(); }
647 ;
648
649// ************************ CONSTANTS ********************************
650
651constant:
652 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
653 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
654 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
655 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
656 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
657 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
658 ;
659
660quasi_keyword: // CFA
661 TIMEOUT
662 | WAND
663 | WOR
664 | CATCH
665 | RECOVER
666 | CATCHRESUME
667 | FIXUP
668 | FINALLY
669 ;
670
671identifier:
672 IDENTIFIER
673 | quasi_keyword
674 ;
675
676identifier_at:
677 identifier
678 | '@' // CFA
679 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
680 ;
681
682string_literal:
683 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
684 ;
685
686string_literal_list: // juxtaposed strings are concatenated
687 STRINGliteral { $$ = $1; } // conversion from tok to str
688 | string_literal_list STRINGliteral
689 {
690 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
691 delete $2; // allocated by lexer
692 $$ = $1; // conversion from tok to str
693 }
694 ;
695
696// ************************ EXPRESSIONS ********************************
697
698primary_expression:
699 IDENTIFIER // typedef name cannot be used as a variable name
700 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
701 | quasi_keyword
702 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
703 | TYPEDIMname // CFA, generic length argument
704 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
705 | tuple
706 | '(' comma_expression ')'
707 { $$ = $2; }
708 | '(' compound_statement ')' // GCC, lambda expression
709 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
710 | type_name '.' identifier // CFA, nested type
711 { $$ = new ExpressionNode( build_qualified_expr( yylloc, DeclarationNode::newFromTypeData( $1 ), build_varref( yylloc, $3 ) ) ); }
712 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
713 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
714 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
715 {
716 // add the missing control expression to the GenericExpr and return it
717 $5->control = maybeMoveBuild( $3 );
718 $$ = new ExpressionNode( $5 );
719 }
720 // | RESUME '(' comma_expression ')'
721 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
722 // | RESUME '(' comma_expression ')' compound_statement
723 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
724 | IDENTIFIER IDENTIFIER // invalid syntax rule
725 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "expression" ); $$ = nullptr; }
726 | IDENTIFIER type_qualifier // invalid syntax rule
727 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
728 | IDENTIFIER storage_class // invalid syntax rule
729 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
730 | IDENTIFIER basic_type_name // invalid syntax rule
731 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
732 | IDENTIFIER TYPEDEFname // invalid syntax rule
733 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
734 | IDENTIFIER TYPEGENname // invalid syntax rule
735 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
736 ;
737
738generic_assoc_list: // C11
739 generic_association
740 | generic_assoc_list ',' generic_association
741 {
742 // steal the association node from the singleton and delete the wrapper
743 assert( 1 == $3->associations.size() );
744 $1->associations.push_back( $3->associations.front() );
745 delete $3;
746 $$ = $1;
747 }
748 ;
749
750generic_association: // C11
751 type_no_function ':' assignment_expression
752 {
753 // create a GenericExpr wrapper with one association pair
754 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
755 }
756 | DEFAULT ':' assignment_expression
757 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
758 ;
759
760postfix_expression:
761 primary_expression
762 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
763 // Historic, transitional: Disallow commas in subscripts.
764 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
765 // Current: Commas in subscripts make tuples.
766 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, $3->set_last( $5 ) ) ) ) ); }
767 | postfix_expression '[' assignment_expression ']'
768 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
769 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
770 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
771 // equivalent to the old x[i,j].
772 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
773 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
774 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
775 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
776 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
777 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
778 {
779 Token fn;
780 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
781 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $1->set_last( $3 ) ) ) );
782 }
783 | postfix_expression '(' argument_expression_list_opt ')'
784 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
785 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
786 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
787 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg" ) ) ),
788 $3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) ) ) ); }
789 | postfix_expression '`' identifier // CFA, postfix call
790 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
791 | constant '`' identifier // CFA, postfix call
792 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
793 | string_literal '`' identifier // CFA, postfix call
794 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
795
796 // SKULLDUGGERY: The typedef table used for parsing does not store fields in structures. To parse a qualified
797 // name, it is assumed all name-tokens after the first are identifiers, regardless of how the lexer identifies
798 // them. For example:
799 //
800 // struct S;
801 // forall(T) struct T;
802 // union U;
803 // enum E { S, T, E };
804 // struct Z { int S, T, Z, E, U; };
805 // void fred () {
806 // Z z;
807 // z.S; // lexer returns S is TYPEDEFname
808 // z.T; // lexer returns T is TYPEGENname
809 // z.Z; // lexer returns Z is TYPEDEFname
810 // z.U; // lexer returns U is TYPEDEFname
811 // z.E; // lexer returns E is TYPEDEFname
812 // }
813 | postfix_expression '.' identifier
814 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
815 | postfix_expression '.' TYPEDEFname // CFA, SKULLDUGGERY
816 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
817 | postfix_expression '.' TYPEGENname // CFA, SKULLDUGGERY
818 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
819
820 | postfix_expression '.' INTEGERconstant // CFA, tuple index
821 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
822 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
823 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
824 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
825 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
826 | postfix_expression '.' aggregate_control
827 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
828 | postfix_expression ARROW identifier
829 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
830 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
831 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
832 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
833 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
834 | postfix_expression ICR
835 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
836 | postfix_expression DECR
837 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
838 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
839 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
840 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
841 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
842 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
843 {
844 Token fn;
845 fn.str = new string( "^?{}" ); // location undefined
846 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $2->set_last( $4 ) ) );
847 }
848 ;
849
850argument_expression_list_opt:
851 // empty
852 { $$ = nullptr; }
853 | argument_expression_list
854 ;
855
856argument_expression_list:
857 argument_expression
858 | argument_expression_list_opt ',' argument_expression
859 { $$ = $1->set_last( $3 ); }
860 ;
861
862argument_expression:
863 '@' // CFA, default parameter
864 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
865 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
866 | assignment_expression
867 ;
868
869field_name_list: // CFA, tuple field selector
870 field
871 | field_name_list ',' field { $$ = $1->set_last( $3 ); }
872 ;
873
874field: // CFA, tuple field selector
875 field_name
876 | FLOATING_DECIMALconstant field
877 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
878 | FLOATING_DECIMALconstant '[' field_name_list ']'
879 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
880 | field_name '.' field
881 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
882 | field_name '.' '[' field_name_list ']'
883 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
884 | field_name ARROW field
885 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
886 | field_name ARROW '[' field_name_list ']'
887 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
888 ;
889
890field_name:
891 INTEGERconstant fraction_constants_opt
892 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
893 | FLOATINGconstant fraction_constants_opt
894 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
895 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
896 {
897 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
898 }
899 ;
900
901fraction_constants_opt:
902 // empty
903 { $$ = nullptr; }
904 | fraction_constants_opt FLOATING_FRACTIONconstant
905 {
906 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
907 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
908 }
909 ;
910
911unary_expression:
912 postfix_expression
913 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
914 // semantics checks, e.g., ++3, 3--, *3, &&3
915 | constant
916 | string_literal
917 { $$ = $1; }
918 | EXTENSION cast_expression // GCC
919 { $$ = $2->set_extension( true ); }
920 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
921 // { * X; } // dereference X
922 // { * int X; } // CFA declaration of pointer to int
923 | ptrref_operator cast_expression // CFA
924 {
925 switch ( $1 ) {
926 case OperKinds::AddressOf:
927 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
928 break;
929 case OperKinds::PointTo:
930 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
931 break;
932 case OperKinds::And:
933 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
934 break;
935 default:
936 assert( false );
937 }
938 }
939 | unary_operator cast_expression
940 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
941 | ICR unary_expression
942 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
943 | DECR unary_expression
944 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
945 | SIZEOF unary_expression
946 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
947 | SIZEOF '(' type_no_function ')'
948 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
949 | ALIGNOF unary_expression // GCC, variable alignment
950 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
951 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
952 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
953
954 // Cannot use rule "type", which includes cfa_abstract_function, for sizeof/alignof, because of S/R problems on
955 // look ahead, so the cfa_abstract_function is factored out.
956 | SIZEOF '(' cfa_abstract_function ')'
957 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
958 | ALIGNOF '(' cfa_abstract_function ')' // GCC, type alignment
959 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
960
961 | OFFSETOF '(' type_no_function ',' identifier ')'
962 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
963 | TYPEID '(' type ')'
964 {
965 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
966 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
967 }
968 ;
969
970ptrref_operator:
971 '*' { $$ = OperKinds::PointTo; }
972 | '&' { $$ = OperKinds::AddressOf; }
973 // GCC, address of label must be handled by semantic check for ref,ref,label
974 | ANDAND { $$ = OperKinds::And; }
975 ;
976
977unary_operator:
978 '+' { $$ = OperKinds::UnPlus; }
979 | '-' { $$ = OperKinds::UnMinus; }
980 | '!' { $$ = OperKinds::Neg; }
981 | '~' { $$ = OperKinds::BitNeg; }
982 ;
983
984cast_expression:
985 unary_expression
986 | '(' type_no_function ')' cast_expression
987 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
988 | '(' aggregate_control '&' ')' cast_expression // CFA
989 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
990 | '(' aggregate_control '*' ')' cast_expression // CFA
991 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
992 | '(' VIRTUAL ')' cast_expression // CFA
993 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), nullptr ) ); }
994 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
995 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
996 | '(' RETURN type_no_function ')' cast_expression // CFA
997 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
998 | '(' COERCE type_no_function ')' cast_expression // CFA
999 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
1000 | '(' qualifier_cast_list ')' cast_expression // CFA
1001 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
1002// | '(' type_no_function ')' tuple
1003// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
1004 ;
1005
1006qualifier_cast_list:
1007 cast_modifier type_qualifier_name
1008 | cast_modifier MUTEX
1009 | qualifier_cast_list cast_modifier type_qualifier_name
1010 | qualifier_cast_list cast_modifier MUTEX
1011 ;
1012
1013cast_modifier:
1014 '-'
1015 | '+'
1016 ;
1017
1018exponential_expression:
1019 cast_expression
1020 | exponential_expression '\\' cast_expression
1021 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
1022 ;
1023
1024multiplicative_expression:
1025 exponential_expression
1026 | multiplicative_expression '*' exponential_expression
1027 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
1028 | multiplicative_expression '/' exponential_expression
1029 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
1030 | multiplicative_expression '%' exponential_expression
1031 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
1032 ;
1033
1034additive_expression:
1035 multiplicative_expression
1036 | additive_expression '+' multiplicative_expression
1037 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
1038 | additive_expression '-' multiplicative_expression
1039 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
1040 ;
1041
1042shift_expression:
1043 additive_expression
1044 | shift_expression LS additive_expression
1045 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
1046 | shift_expression RS additive_expression
1047 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
1048 ;
1049
1050relational_expression:
1051 shift_expression
1052 | relational_expression '<' shift_expression
1053 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
1054 | relational_expression '>' shift_expression
1055 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
1056 | relational_expression LE shift_expression
1057 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
1058 | relational_expression GE shift_expression
1059 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
1060 ;
1061
1062equality_expression:
1063 relational_expression
1064 | equality_expression EQ relational_expression
1065 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1066 | equality_expression NE relational_expression
1067 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1068 ;
1069
1070AND_expression:
1071 equality_expression
1072 | AND_expression '&' equality_expression
1073 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1074 ;
1075
1076exclusive_OR_expression:
1077 AND_expression
1078 | exclusive_OR_expression '^' AND_expression
1079 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1080 ;
1081
1082inclusive_OR_expression:
1083 exclusive_OR_expression
1084 | inclusive_OR_expression '|' exclusive_OR_expression
1085 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1086 ;
1087
1088logical_AND_expression:
1089 inclusive_OR_expression
1090 | logical_AND_expression ANDAND inclusive_OR_expression
1091 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1092 ;
1093
1094logical_OR_expression:
1095 logical_AND_expression
1096 | logical_OR_expression OROR logical_AND_expression
1097 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1098 ;
1099
1100conditional_expression:
1101 logical_OR_expression
1102 | logical_OR_expression '?' comma_expression ':' conditional_expression
1103 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1104 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1105 { $$ = new ExpressionNode( build_cond( yylloc, $1, nullptr, $4 ) ); }
1106 ;
1107
1108constant_expression:
1109 conditional_expression
1110 ;
1111
1112assignment_expression:
1113 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1114 conditional_expression
1115 | unary_expression assignment_operator assignment_expression
1116 {
1117// if ( $2 == OperKinds::AtAssn ) {
1118// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1119// } else {
1120 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1121// } // if
1122 }
1123 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1124 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1125 ;
1126
1127assignment_expression_opt:
1128 // empty
1129 { $$ = nullptr; }
1130 | assignment_expression
1131 ;
1132
1133assignment_operator:
1134 simple_assignment_operator
1135 | compound_assignment_operator
1136 ;
1137
1138simple_assignment_operator:
1139 '=' { $$ = OperKinds::Assign; }
1140 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1141 ;
1142
1143compound_assignment_operator:
1144 EXPassign { $$ = OperKinds::ExpAssn; }
1145 | MULTassign { $$ = OperKinds::MulAssn; }
1146 | DIVassign { $$ = OperKinds::DivAssn; }
1147 | MODassign { $$ = OperKinds::ModAssn; }
1148 | PLUSassign { $$ = OperKinds::PlusAssn; }
1149 | MINUSassign { $$ = OperKinds::MinusAssn; }
1150 | LSassign { $$ = OperKinds::LSAssn; }
1151 | RSassign { $$ = OperKinds::RSAssn; }
1152 | ANDassign { $$ = OperKinds::AndAssn; }
1153 | ERassign { $$ = OperKinds::ERAssn; }
1154 | ORassign { $$ = OperKinds::OrAssn; }
1155 ;
1156
1157tuple: // CFA, tuple
1158 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1159 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1160// '[' ']'
1161// { $$ = new ExpressionNode( build_tuple() ); }
1162// | '[' push assignment_expression pop ']'
1163// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1164 '[' ',' tuple_expression_list ']'
1165 { $$ = new ExpressionNode( build_tuple( yylloc, (new ExpressionNode( nullptr ))->set_last( $3 ) ) ); }
1166 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1167 { $$ = new ExpressionNode( build_tuple( yylloc, $3->set_last( $6 ) ) ); }
1168 ;
1169
1170tuple_expression_list:
1171 assignment_expression
1172 | '@' // CFA
1173 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1174 | tuple_expression_list ',' assignment_expression
1175 { $$ = $1->set_last( $3 ); }
1176 | tuple_expression_list ',' '@'
1177 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1178 ;
1179
1180comma_expression:
1181 assignment_expression
1182 | comma_expression ',' assignment_expression
1183 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1184 ;
1185
1186comma_expression_opt:
1187 // empty
1188 { $$ = nullptr; }
1189 | comma_expression
1190 ;
1191
1192// ************************** STATEMENTS *******************************
1193
1194statement:
1195 labeled_statement
1196 | compound_statement
1197 | expression_statement
1198 | selection_statement
1199 | iteration_statement
1200 | jump_statement
1201 | with_statement
1202 | mutex_statement
1203 | waitfor_statement
1204 | waituntil_statement
1205 | corun_statement
1206 | cofor_statement
1207 | exception_statement
1208 | enable_disable_statement
1209 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1210 | asm_statement
1211 | DIRECTIVE
1212 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1213 ;
1214
1215labeled_statement:
1216 // labels cannot be identifiers 0 or 1
1217 identifier_or_type_name ':' attribute_list_opt statement
1218 { $$ = $4->add_label( yylloc, $1, $3 ); }
1219 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1220 {
1221 SemanticError( yylloc, "syntx error, label \"%s\" must be associated with a statement, "
1222 "where a declaration, case, or default is not a statement.\n"
1223 "Move the label or terminate with a semicolon.", $1.str->c_str() );
1224 $$ = nullptr;
1225 }
1226 ;
1227
1228compound_statement:
1229 '{' '}'
1230 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1231 | '{' push
1232 local_label_declaration_opt // GCC, local labels appear at start of block
1233 statement_decl_list // C99, intermix declarations and statements
1234 pop '}'
1235 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1236 ;
1237
1238statement_decl_list: // C99
1239 statement_decl
1240 | statement_decl_list statement_decl
1241 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1242 ;
1243
1244statement_decl:
1245 declaration // CFA, new & old style declarations
1246 { $$ = new StatementNode( $1 ); }
1247 | EXTENSION declaration // GCC
1248 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1249 | function_definition
1250 { $$ = new StatementNode( $1 ); }
1251 | EXTENSION function_definition // GCC
1252 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1253 | statement
1254 ;
1255
1256statement_list_nodecl:
1257 statement
1258 | statement_list_nodecl statement
1259 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1260 | statement_list_nodecl error // invalid syntax rule
1261 { SemanticError( yylloc, "syntax error, declarations only allowed at the start of the switch body,"
1262 " i.e., after the '{'." ); $$ = nullptr; }
1263 ;
1264
1265expression_statement:
1266 comma_expression_opt ';'
1267 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1268 ;
1269
1270// "if", "switch", and "choose" require parenthesis around the conditional. See the following ambiguities without
1271// parenthesis:
1272//
1273// if x + y + z; => if ( x ) + y + z or if ( x + y ) + z
1274//
1275// switch O { }
1276//
1277// O{} => object-constructor for conditional, switch body ???
1278// O{} => O for conditional followed by switch body
1279//
1280// C++ has this problem, as it has the same constructor syntax.
1281//
1282// switch sizeof ( T ) { }
1283//
1284// sizeof ( T ) => sizeof of T for conditional followed by switch body
1285// sizeof ( T ) => sizeof of compound literal (T){ }, closing parenthesis ???
1286//
1287// Note the two grammar rules for sizeof (alignof)
1288//
1289// | SIZEOF unary_expression
1290// | SIZEOF '(' type_no_function ')'
1291//
1292// where the first DOES NOT require parenthesis! And C++ inherits this problem from C.
1293
1294selection_statement:
1295 IF '(' conditional_declaration ')' statement %prec THEN
1296 // explicitly deal with the shift/reduce conflict on if/else
1297 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1298 | IF '(' conditional_declaration ')' statement ELSE statement
1299 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1300 | SWITCH '(' comma_expression ')' case_clause
1301 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1302 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1303 {
1304 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1305 // The semantics of the declaration list is changed to include associated initialization, which is performed
1306 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1307 // statement around the switch. Statements after the initial declaration list can never be executed, and
1308 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1309 // statement.
1310 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1311 }
1312 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1313 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1314 | CHOOSE '(' comma_expression ')' case_clause // CFA
1315 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1316 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1317 {
1318 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1319 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1320 }
1321 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1322 { SemanticError( yylloc, "syntax error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1323 ;
1324
1325conditional_declaration:
1326 comma_expression
1327 { $$ = new CondCtl( nullptr, $1 ); }
1328 | c_declaration // no semi-colon
1329 { $$ = new CondCtl( $1, nullptr ); }
1330 | cfa_declaration // no semi-colon
1331 { $$ = new CondCtl( $1, nullptr ); }
1332 | declaration comma_expression // semi-colon separated
1333 { $$ = new CondCtl( $1, $2 ); }
1334 ;
1335
1336// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1337// clause allows a list of values and subranges.
1338
1339case_value: // CFA
1340 constant_expression { $$ = $1; }
1341 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1342 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1343 | subrange // CFA, subrange
1344 ;
1345
1346case_value_list: // CFA
1347 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1348 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1349 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1350 ;
1351
1352case_label: // CFA
1353 CASE error // invalid syntax rule
1354 { SemanticError( yylloc, "syntax error, case list missing after case." ); $$ = nullptr; }
1355 | CASE case_value_list ':' { $$ = $2; }
1356 | CASE case_value_list error // invalid syntax rule
1357 { SemanticError( yylloc, "syntax error, colon missing after case list." ); $$ = nullptr; }
1358 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1359 // A semantic check is required to ensure only one default clause per switch/choose statement.
1360 | DEFAULT error // invalid syntax rule
1361 { SemanticError( yylloc, "syntax error, colon missing after default." ); $$ = nullptr; }
1362 ;
1363
1364case_label_list: // CFA
1365 case_label
1366 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1367 ;
1368
1369case_clause: // CFA
1370 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1371 ;
1372
1373switch_clause_list_opt: // CFA
1374 // empty
1375 { $$ = nullptr; }
1376 | switch_clause_list
1377 ;
1378
1379switch_clause_list: // CFA
1380 case_label_list statement_list_nodecl
1381 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1382 | switch_clause_list case_label_list statement_list_nodecl
1383 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1384 ;
1385
1386iteration_statement:
1387 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1388 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1389 | WHILE '(' ')' statement ELSE statement // CFA
1390 {
1391 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1392 SemanticWarning( yylloc, Warning::SuperfluousElse );
1393 }
1394 | WHILE '(' conditional_declaration ')' statement %prec THEN
1395 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1396 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1397 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1398 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1399 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1400 | DO statement WHILE '(' ')' ELSE statement // CFA
1401 {
1402 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1403 SemanticWarning( yylloc, Warning::SuperfluousElse );
1404 }
1405 | DO statement WHILE '(' comma_expression ')' ';'
1406 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1407 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1408 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1409 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1410 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1411 | FOR '(' ')' statement ELSE statement // CFA
1412 {
1413 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1414 SemanticWarning( yylloc, Warning::SuperfluousElse );
1415 }
1416 | FOR '(' for_control_expression_list ')' statement %prec THEN
1417 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1418 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1419 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1420 ;
1421
1422for_control_expression_list:
1423 for_control_expression
1424 | for_control_expression_list ':' for_control_expression
1425 // ForCtrl + ForCtrl:
1426 // init + init => multiple declaration statements that are hoisted
1427 // condition + condition => (expression) && (expression)
1428 // change + change => (expression), (expression)
1429 {
1430 $1->init->set_last( $3->init );
1431 if ( $1->condition ) {
1432 if ( $3->condition ) {
1433 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1434 } // if
1435 } else $1->condition = $3->condition;
1436 if ( $1->change ) {
1437 if ( $3->change ) {
1438 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1439 } // if
1440 } else $1->change = $3->change;
1441 $$ = $1;
1442 }
1443 ;
1444
1445for_control_expression:
1446 ';' comma_expression_opt ';' comma_expression_opt
1447 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1448 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1449 {
1450 StatementNode * init = $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr;
1451 $$ = new ForCtrl( init, $3, $5 );
1452 }
1453 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1454 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1455
1456 | '@' ';' comma_expression // CFA, empty loop-index
1457 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1458 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1459 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1460
1461 | comma_expression // CFA, anonymous loop-index
1462 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1463 | downupdowneq comma_expression // CFA, anonymous loop-index
1464 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1465
1466 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1467 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1468 | '@' updowneq comma_expression // CFA, anonymous loop-index
1469 {
1470 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1471 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1472 }
1473 | comma_expression updowneq '@' // CFA, anonymous loop-index
1474 {
1475 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1476 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1477 }
1478 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1479 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1480 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1481 {
1482 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1483 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1484 }
1485 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1486 {
1487 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1488 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1489 }
1490 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1491 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1492 | '@' updowneq '@' // CFA, invalid syntax rule
1493 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1494 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1495 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1496 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1497 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1498 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1499 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1500
1501 | comma_expression ';' comma_expression // CFA
1502 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1503 | comma_expression ';' downupdowneq comma_expression // CFA
1504 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1505
1506 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1507 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1508 | comma_expression ';' '@' updowneq comma_expression // CFA
1509 {
1510 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1511 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1512 }
1513 | comma_expression ';' comma_expression updowneq '@' // CFA
1514 {
1515 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1516 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1517 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1518 }
1519 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1520 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1521
1522 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1523 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1524 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1525 {
1526 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1527 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1528 }
1529 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1530 {
1531 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1532 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1533 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1534 }
1535 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1536 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1537 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1538 {
1539 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1540 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1541 }
1542 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1543 {
1544 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1545 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1546 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1547 }
1548 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1549 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1550
1551 | declaration comma_expression // CFA
1552 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1553 | declaration downupdowneq comma_expression // CFA
1554 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1555
1556 | declaration comma_expression updowneq comma_expression // CFA
1557 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1558 | declaration '@' updowneq comma_expression // CFA
1559 {
1560 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1561 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1562 }
1563 | declaration comma_expression updowneq '@' // CFA
1564 {
1565 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1566 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1567 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1568 }
1569
1570 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1571 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1572 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1573 {
1574 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1575 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1576 }
1577 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1578 {
1579 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1580 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1581 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1582 }
1583 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1584 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1585 | declaration '@' updowneq comma_expression '~' '@' // CFA
1586 {
1587 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1588 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, nullptr );
1589 }
1590 | declaration comma_expression updowneq '@' '~' '@' // CFA
1591 {
1592 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1593 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1594 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1595 }
1596 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1597 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1598
1599 | comma_expression ';' enum_key // CFA, enum type
1600 {
1601 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1602 //$$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1603 }
1604 | comma_expression ';' downupdowneq enum_key // CFA, enum type, reverse direction
1605 {
1606 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) {
1607 SemanticError( yylloc, "syntax error, all enumeration ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr;
1608 }
1609 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1610 }
1611 ;
1612
1613enum_key:
1614 TYPEDEFname
1615 | ENUM TYPEDEFname
1616 ;
1617
1618downupdowneq:
1619 ErangeDown
1620 { $$ = OperKinds::GThan; }
1621 | ErangeUpEq
1622 { $$ = OperKinds::LEThan; }
1623 | ErangeDownEq
1624 { $$ = OperKinds::GEThan; }
1625 ;
1626
1627updown:
1628 '~'
1629 { $$ = OperKinds::LThan; }
1630 | ErangeDown
1631 { $$ = OperKinds::GThan; }
1632 ;
1633
1634updowneq:
1635 updown
1636 | ErangeUpEq
1637 { $$ = OperKinds::LEThan; }
1638 | ErangeDownEq
1639 { $$ = OperKinds::GEThan; }
1640 ;
1641
1642jump_statement:
1643 GOTO identifier_or_type_name ';'
1644 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1645 | GOTO '*' comma_expression ';' // GCC, computed goto
1646 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1647 // whereas normal operator precedence yields goto (*i)+3;
1648 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1649 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1650 | fall_through_name ';' // CFA
1651 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1652 | fall_through_name identifier_or_type_name ';' // CFA
1653 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1654 | fall_through_name DEFAULT ';' // CFA
1655 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1656 | CONTINUE ';'
1657 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1658 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1659 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1660 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1661 // the target of the transfer appears only at the start of an iteration statement.
1662 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1663 | BREAK ';'
1664 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1665 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1666 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1667 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1668 // the target of the transfer appears only at the start of an iteration statement.
1669 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1670 | RETURN comma_expression_opt ';'
1671 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1672 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1673 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1674 | SUSPEND ';'
1675 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1676 | SUSPEND compound_statement
1677 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1678 | SUSPEND COROUTINE ';'
1679 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1680 | SUSPEND COROUTINE compound_statement
1681 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1682 | SUSPEND GENERATOR ';'
1683 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1684 | SUSPEND GENERATOR compound_statement
1685 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1686 | THROW assignment_expression_opt ';' // handles rethrow
1687 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1688 | THROWRESUME assignment_expression_opt ';' // handles reresume
1689 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1690 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1691 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1692 ;
1693
1694fall_through_name: // CFA
1695 FALLTHRU
1696 | FALLTHROUGH
1697 ;
1698
1699with_statement:
1700 WITH '(' tuple_expression_list ')' statement
1701 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1702 ;
1703
1704// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1705mutex_statement:
1706 MUTEX '(' argument_expression_list_opt ')' statement
1707 {
1708 if ( ! $3 ) { SemanticError( yylloc, "syntax error, mutex argument list cannot be empty." ); $$ = nullptr; }
1709 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1710 }
1711 ;
1712
1713when_clause:
1714 WHEN '(' comma_expression ')' { $$ = $3; }
1715 ;
1716
1717when_clause_opt:
1718 // empty
1719 { $$ = nullptr; }
1720 | when_clause
1721 ;
1722
1723cast_expression_list:
1724 cast_expression
1725 | cast_expression_list ',' cast_expression
1726 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1727 ;
1728
1729timeout:
1730 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1731 ;
1732
1733wor:
1734 OROR
1735 | WOR
1736
1737waitfor:
1738 WAITFOR '(' cast_expression ')'
1739 { $$ = $3; }
1740 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1741 { $$ = $3->set_last( $5 ); }
1742 ;
1743
1744wor_waitfor_clause:
1745 when_clause_opt waitfor statement %prec THEN
1746 // Called first: create header for WaitForStmt.
1747 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1748 | wor_waitfor_clause wor when_clause_opt waitfor statement
1749 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1750 | wor_waitfor_clause wor when_clause_opt ELSE statement
1751 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1752 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1753 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1754 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1755 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1756 { SemanticError( yylloc, "syntax error, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1757 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1758 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1759 ;
1760
1761waitfor_statement:
1762 wor_waitfor_clause %prec THEN
1763 { $$ = new StatementNode( $1 ); }
1764 ;
1765
1766wand:
1767 ANDAND
1768 | WAND
1769 ;
1770
1771waituntil:
1772 WAITUNTIL '(' comma_expression ')'
1773 { $$ = $3; }
1774 ;
1775
1776waituntil_clause:
1777 when_clause_opt waituntil statement
1778 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1779 | '(' wor_waituntil_clause ')'
1780 { $$ = $2; }
1781 ;
1782
1783wand_waituntil_clause:
1784 waituntil_clause %prec THEN
1785 { $$ = $1; }
1786 | waituntil_clause wand wand_waituntil_clause
1787 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1788 ;
1789
1790wor_waituntil_clause:
1791 wand_waituntil_clause
1792 { $$ = $1; }
1793 | wor_waituntil_clause wor wand_waituntil_clause
1794 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1795 | wor_waituntil_clause wor when_clause_opt ELSE statement
1796 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1797 ;
1798
1799waituntil_statement:
1800 wor_waituntil_clause %prec THEN
1801 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1802 ;
1803
1804corun_statement:
1805 CORUN statement
1806 { $$ = new StatementNode( build_corun( yylloc, $2 ) ); }
1807 ;
1808
1809cofor_statement:
1810 COFOR '(' for_control_expression_list ')' statement
1811 { $$ = new StatementNode( build_cofor( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1812 ;
1813
1814exception_statement:
1815 TRY compound_statement handler_clause %prec THEN
1816 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1817 | TRY compound_statement finally_clause
1818 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1819 | TRY compound_statement handler_clause finally_clause
1820 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1821 ;
1822
1823handler_clause:
1824 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1825 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1826 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1827 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1828 ;
1829
1830handler_predicate_opt:
1831 // empty
1832 { $$ = nullptr; }
1833 | ';' conditional_expression { $$ = $2; }
1834 ;
1835
1836handler_key:
1837 CATCH { $$ = ast::Terminate; }
1838 | RECOVER { $$ = ast::Terminate; }
1839 | CATCHRESUME { $$ = ast::Resume; }
1840 | FIXUP { $$ = ast::Resume; }
1841 ;
1842
1843finally_clause:
1844 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1845 ;
1846
1847exception_declaration:
1848 // No SUE declaration in parameter list.
1849 type_specifier_nobody
1850 | type_specifier_nobody declarator
1851 { $$ = $2->addType( $1 ); }
1852 | type_specifier_nobody variable_abstract_declarator
1853 { $$ = $2->addType( $1 ); }
1854 | cfa_abstract_declarator_tuple identifier // CFA
1855 { $$ = $1->addName( $2 ); }
1856 | cfa_abstract_declarator_tuple // CFA
1857 ;
1858
1859enable_disable_statement:
1860 enable_disable_key identifier_list compound_statement
1861 ;
1862
1863enable_disable_key:
1864 ENABLE
1865 | DISABLE
1866 ;
1867
1868asm_statement:
1869 ASM asm_volatile_opt '(' string_literal ')' ';'
1870 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1871 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1872 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1873 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1874 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1875 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1876 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1877 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1878 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1879 ;
1880
1881asm_volatile_opt: // GCC
1882 // empty
1883 { $$ = false; }
1884 | VOLATILE
1885 { $$ = true; }
1886 ;
1887
1888asm_operands_opt: // GCC
1889 // empty
1890 { $$ = nullptr; } // use default argument
1891 | asm_operands_list
1892 ;
1893
1894asm_operands_list: // GCC
1895 asm_operand
1896 | asm_operands_list ',' asm_operand
1897 { $$ = $1->set_last( $3 ); }
1898 ;
1899
1900asm_operand: // GCC
1901 string_literal '(' constant_expression ')'
1902 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1903 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1904 {
1905 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1906 delete $2.str;
1907 }
1908 ;
1909
1910asm_clobbers_list_opt: // GCC
1911 // empty
1912 { $$ = nullptr; } // use default argument
1913 | string_literal
1914 { $$ = $1; }
1915 | asm_clobbers_list_opt ',' string_literal
1916 { $$ = $1->set_last( $3 ); }
1917 ;
1918
1919label_list:
1920 identifier
1921 {
1922 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1923 delete $1; // allocated by lexer
1924 }
1925 | label_list ',' identifier
1926 {
1927 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1928 delete $3; // allocated by lexer
1929 }
1930 ;
1931
1932// ****************************** DECLARATIONS *********************************
1933
1934declaration_list_opt: // used at beginning of switch statement
1935 // empty
1936 { $$ = nullptr; }
1937 | declaration_list
1938 ;
1939
1940declaration_list:
1941 declaration
1942 | declaration_list declaration
1943 { $$ = $1->set_last( $2 ); }
1944 ;
1945
1946KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1947 // empty
1948 { $$ = nullptr; }
1949 | KR_parameter_list
1950 ;
1951
1952KR_parameter_list:
1953 c_declaration ';'
1954 { $$ = $1; }
1955 | KR_parameter_list c_declaration ';'
1956 { $$ = $1->set_last( $2 ); }
1957 ;
1958
1959local_label_declaration_opt: // GCC, local label
1960 // empty
1961 | local_label_declaration_list
1962 ;
1963
1964local_label_declaration_list: // GCC, local label
1965 LABEL local_label_list ';'
1966 | local_label_declaration_list LABEL local_label_list ';'
1967 ;
1968
1969local_label_list: // GCC, local label
1970 identifier_or_type_name
1971 | local_label_list ',' identifier_or_type_name
1972 ;
1973
1974declaration: // old & new style declarations
1975 c_declaration ';'
1976 | cfa_declaration ';' // CFA
1977 | static_assert // C11
1978 ;
1979
1980static_assert:
1981 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1982 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
1983 | STATICASSERT '(' constant_expression ')' ';' // CFA
1984 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
1985
1986// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1987// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1988// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1989// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1990// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1991// block, but cannot be mixed within a specific declaration.
1992//
1993// CFA C
1994// [10] int x; int x[10]; // array of 10 integers
1995// [10] * char y; char *y[10]; // array of 10 pointers to char
1996
1997cfa_declaration: // CFA
1998 cfa_variable_declaration
1999 | cfa_typedef_declaration
2000 | cfa_function_declaration
2001 | type_declaring_list
2002 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
2003 | trait_specifier
2004 ;
2005
2006cfa_variable_declaration: // CFA
2007 cfa_variable_specifier initializer_opt
2008 { $$ = $1->addInitializer( $2 ); }
2009 | declaration_qualifier_list cfa_variable_specifier initializer_opt
2010 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
2011 // them as a type_qualifier cannot appear in that context.
2012 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
2013 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
2014 { $$ = $1->set_last( $1->cloneType( $5 )->addInitializer( $6 ) ); }
2015 ;
2016
2017cfa_variable_specifier: // CFA
2018 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2019 // storage-class
2020 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
2021 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2022 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
2023 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2024 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
2025 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
2026 ;
2027
2028cfa_function_declaration: // CFA
2029 cfa_function_specifier
2030 | type_qualifier_list cfa_function_specifier
2031 { $$ = $2->addQualifiers( $1 ); }
2032 | declaration_qualifier_list cfa_function_specifier
2033 { $$ = $2->addQualifiers( $1 ); }
2034 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
2035 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
2036 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')'
2037 {
2038 // Append the return type at the start (left-hand-side) to each identifier in the list.
2039 DeclarationNode * ret = new DeclarationNode;
2040 ret->type = maybeCopy( $1->type->base );
2041 $$ = $1->set_last( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
2042 }
2043 ;
2044
2045cfa_function_specifier: // CFA
2046 '[' ']' identifier '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2047 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2048 | '[' ']' TYPEDEFname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2049 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2050 // | '[' ']' TYPEGENname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2051 // { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2052
2053 // identifier_or_type_name must be broken apart because of the sequence:
2054 //
2055 // '[' ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
2056 // '[' ']' type_specifier
2057 //
2058 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
2059 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
2060 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2061 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
2062 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2063 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2064 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2065 ;
2066
2067cfa_function_return: // CFA
2068 '[' push cfa_parameter_list pop ']'
2069 { $$ = DeclarationNode::newTuple( $3 ); }
2070 | '[' push cfa_parameter_list ',' cfa_abstract_parameter_list pop ']'
2071 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
2072 { $$ = DeclarationNode::newTuple( $3->set_last( $5 ) ); }
2073 ;
2074
2075cfa_typedef_declaration: // CFA
2076 TYPEDEF cfa_variable_specifier
2077 {
2078 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
2079 $$ = $2->addTypedef();
2080 }
2081 | TYPEDEF cfa_function_specifier
2082 {
2083 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2084 $$ = $2->addTypedef();
2085 }
2086 | cfa_typedef_declaration ',' identifier
2087 {
2088 typedefTable.addToEnclosingScope( *$3, TYPEDEFname, "cfa_typedef_declaration 3" );
2089 $$ = $1->set_last( $1->cloneType( $3 ) );
2090 }
2091 ;
2092
2093// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2094// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2095
2096typedef_declaration:
2097 TYPEDEF type_specifier declarator
2098 {
2099 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2100 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2101 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2102 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2103 }
2104 | typedef_declaration ',' declarator
2105 {
2106 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2107 $$ = $1->set_last( $1->cloneBaseType( $3 )->addTypedef() );
2108 }
2109 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2110 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2111 | type_specifier TYPEDEF declarator
2112 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2113 | type_specifier TYPEDEF type_qualifier_list declarator
2114 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2115 ;
2116
2117typedef_expression:
2118 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2119 TYPEDEF identifier '=' assignment_expression
2120 {
2121 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2122 }
2123 | typedef_expression ',' identifier '=' assignment_expression
2124 {
2125 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2126 }
2127 ;
2128
2129c_declaration:
2130 declaration_specifier declaring_list
2131 { $$ = distAttr( $1, $2 ); }
2132 | typedef_declaration
2133 | typedef_expression // deprecated GCC, naming expression type
2134 | sue_declaration_specifier
2135 {
2136 assert( $1->type );
2137 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2138 SemanticError( yylloc, "syntax error, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2139 }
2140 // enums are never empty declarations because there must have at least one enumeration.
2141 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2142 SemanticError( yylloc, "syntax error, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2143 }
2144 }
2145 ;
2146
2147declaring_list:
2148 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2149 // storage-class
2150 variable_declarator asm_name_opt initializer_opt
2151 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2152 | variable_type_redeclarator asm_name_opt initializer_opt
2153 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2154
2155 | general_function_declarator asm_name_opt
2156 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2157 | general_function_declarator asm_name_opt '=' VOID
2158 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2159
2160 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2161 { $$ = $1->set_last( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2162 ;
2163
2164general_function_declarator:
2165 function_type_redeclarator
2166 | function_declarator
2167 ;
2168
2169declaration_specifier: // type specifier + storage class
2170 basic_declaration_specifier
2171 | type_declaration_specifier
2172 | sue_declaration_specifier
2173 | sue_declaration_specifier invalid_types // invalid syntax rule
2174 {
2175 SemanticError( yylloc, "syntax error, expecting ';' at end of \"%s\" declaration.",
2176 ast::AggregateDecl::aggrString( $1->type->aggregate.kind ) );
2177 $$ = nullptr;
2178 }
2179 ;
2180
2181invalid_types:
2182 aggregate_key
2183 | basic_type_name
2184 | indirect_type
2185 ;
2186
2187declaration_specifier_nobody: // type specifier + storage class - {...}
2188 // Preclude SUE declarations in restricted scopes:
2189 //
2190 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2191 //
2192 // because it is impossible to call f due to name equivalence.
2193 basic_declaration_specifier
2194 | sue_declaration_specifier_nobody
2195 | type_declaration_specifier
2196 ;
2197
2198type_specifier: // type specifier
2199 basic_type_specifier
2200 | sue_type_specifier
2201 | type_type_specifier
2202 ;
2203
2204type_specifier_nobody: // type specifier - {...}
2205 // Preclude SUE declarations in restricted scopes:
2206 //
2207 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2208 //
2209 // because it is impossible to call f due to name equivalence.
2210 basic_type_specifier
2211 | sue_type_specifier_nobody
2212 | type_type_specifier
2213 ;
2214
2215type_qualifier_list_opt: // GCC, used in asm_statement
2216 // empty
2217 { $$ = nullptr; }
2218 | type_qualifier_list
2219 ;
2220
2221type_qualifier_list:
2222 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2223 //
2224 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2225 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2226 // appeared only once.
2227 type_qualifier
2228 | type_qualifier_list type_qualifier
2229 { $$ = $1->addQualifiers( $2 ); }
2230 ;
2231
2232type_qualifier:
2233 type_qualifier_name
2234 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2235 | attribute // trick handles most attribute locations
2236 ;
2237
2238type_qualifier_name:
2239 CONST
2240 { $$ = build_type_qualifier( ast::CV::Const ); }
2241 | RESTRICT
2242 { $$ = build_type_qualifier( ast::CV::Restrict ); }
2243 | VOLATILE
2244 { $$ = build_type_qualifier( ast::CV::Volatile ); }
2245 | ATOMIC
2246 { $$ = build_type_qualifier( ast::CV::Atomic ); }
2247
2248 // forall is a CV qualifier because it can appear in places where SC qualifiers are disallowed.
2249 //
2250 // void foo( forall( T ) T (*)( T ) ); // forward declaration
2251 // void bar( static int ); // static disallowed (gcc/CFA)
2252 | forall
2253 { $$ = build_forall( $1 ); }
2254 ;
2255
2256forall:
2257 FORALL '(' type_parameter_list ')' // CFA
2258 { $$ = $3; }
2259 ;
2260
2261declaration_qualifier_list:
2262 storage_class_list
2263 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2264 { $$ = $1->addQualifiers( $2 ); }
2265 | declaration_qualifier_list type_qualifier_list storage_class_list
2266 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2267 ;
2268
2269storage_class_list:
2270 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2271 // only one of each is specified, except for inline, which can appear with the others.
2272 //
2273 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2274 // specifiers in a declaration.
2275 storage_class
2276 | storage_class_list storage_class
2277 { $$ = $1->addQualifiers( $2 ); }
2278 ;
2279
2280storage_class:
2281 EXTERN
2282 { $$ = DeclarationNode::newStorageClass( ast::Storage::Extern ); }
2283 | STATIC
2284 { $$ = DeclarationNode::newStorageClass( ast::Storage::Static ); }
2285 | AUTO
2286 { $$ = DeclarationNode::newStorageClass( ast::Storage::Auto ); }
2287 | REGISTER
2288 { $$ = DeclarationNode::newStorageClass( ast::Storage::Register ); }
2289 | THREADLOCALGCC // GCC
2290 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalGcc ); }
2291 | THREADLOCALC11 // C11
2292 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalC11 ); }
2293 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2294 | INLINE // C99
2295 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Inline ); }
2296 | FORTRAN // C99
2297 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Fortran ); }
2298 | NORETURN // C11
2299 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Noreturn ); }
2300 ;
2301
2302basic_type_name:
2303 basic_type_name_type
2304 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2305 ;
2306
2307// Just an intermediate value for conversion.
2308basic_type_name_type:
2309 VOID
2310 { $$ = build_basic_type( TypeData::Void ); }
2311 | BOOL // C99
2312 { $$ = build_basic_type( TypeData::Bool ); }
2313 | CHAR
2314 { $$ = build_basic_type( TypeData::Char ); }
2315 | INT
2316 { $$ = build_basic_type( TypeData::Int ); }
2317 | INT128
2318 { $$ = build_basic_type( TypeData::Int128 ); }
2319 | UINT128
2320 { $$ = addType( build_basic_type( TypeData::Int128 ), build_signedness( TypeData::Unsigned ) ); }
2321 | FLOAT
2322 { $$ = build_basic_type( TypeData::Float ); }
2323 | DOUBLE
2324 { $$ = build_basic_type( TypeData::Double ); }
2325 | uuFLOAT80
2326 { $$ = build_basic_type( TypeData::uuFloat80 ); }
2327 | uuFLOAT128
2328 { $$ = build_basic_type( TypeData::uuFloat128 ); }
2329 | uFLOAT16
2330 { $$ = build_basic_type( TypeData::uFloat16 ); }
2331 | uFLOAT32
2332 { $$ = build_basic_type( TypeData::uFloat32 ); }
2333 | uFLOAT32X
2334 { $$ = build_basic_type( TypeData::uFloat32x ); }
2335 | uFLOAT64
2336 { $$ = build_basic_type( TypeData::uFloat64 ); }
2337 | uFLOAT64X
2338 { $$ = build_basic_type( TypeData::uFloat64x ); }
2339 | uFLOAT128
2340 { $$ = build_basic_type( TypeData::uFloat128 ); }
2341 | DECIMAL32
2342 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2343 | DECIMAL64
2344 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2345 | DECIMAL128
2346 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2347 | COMPLEX // C99
2348 { $$ = build_complex_type( TypeData::Complex ); }
2349 | IMAGINARY // C99
2350 { $$ = build_complex_type( TypeData::Imaginary ); }
2351 | SIGNED
2352 { $$ = build_signedness( TypeData::Signed ); }
2353 | UNSIGNED
2354 { $$ = build_signedness( TypeData::Unsigned ); }
2355 | SHORT
2356 { $$ = build_length( TypeData::Short ); }
2357 | LONG
2358 { $$ = build_length( TypeData::Long ); }
2359 | VA_LIST // GCC, __builtin_va_list
2360 { $$ = build_builtin_type( TypeData::Valist ); }
2361 | AUTO_TYPE
2362 { $$ = build_builtin_type( TypeData::AutoType ); }
2363 | vtable
2364 ;
2365
2366vtable_opt:
2367 // empty
2368 { $$ = nullptr; }
2369 | vtable
2370 ;
2371
2372vtable:
2373 VTABLE '(' type_name ')' default_opt
2374 { $$ = build_vtable_type( $3 ); }
2375 ;
2376
2377default_opt:
2378 // empty
2379 { $$ = nullptr; }
2380 | DEFAULT
2381 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2382 ;
2383
2384basic_declaration_specifier:
2385 // A semantic check is necessary for conflicting storage classes.
2386 basic_type_specifier
2387 | declaration_qualifier_list basic_type_specifier
2388 { $$ = $2->addQualifiers( $1 ); }
2389 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2390 { $$ = $1->addQualifiers( $2 ); }
2391 | basic_declaration_specifier storage_class type_qualifier_list
2392 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2393 | basic_declaration_specifier storage_class basic_type_specifier
2394 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2395 ;
2396
2397basic_type_specifier:
2398 direct_type
2399 // Cannot have type modifiers, e.g., short, long, etc.
2400 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2401 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2402 ;
2403
2404direct_type:
2405 basic_type_name
2406 | type_qualifier_list basic_type_name
2407 { $$ = $2->addQualifiers( $1 ); }
2408 | direct_type type_qualifier
2409 { $$ = $1->addQualifiers( $2 ); }
2410 | direct_type basic_type_name
2411 { $$ = $1->addType( $2 ); }
2412 ;
2413
2414indirect_type:
2415 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2416 { $$ = $3; }
2417 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2418 { $$ = DeclarationNode::newTypeof( $3 ); }
2419 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2420 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2421 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2422 { $$ = DeclarationNode::newTypeof( $3, true ); }
2423 | ZERO_T // CFA
2424 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::Zero ) ); }
2425 | ONE_T // CFA
2426 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::One ) ); }
2427 ;
2428
2429sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2430 sue_type_specifier
2431 | declaration_qualifier_list sue_type_specifier
2432 { $$ = $2->addQualifiers( $1 ); }
2433 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2434 { $$ = $1->addQualifiers( $2 ); }
2435 | sue_declaration_specifier storage_class type_qualifier_list
2436 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2437 ;
2438
2439sue_type_specifier: // struct, union, enum + type specifier
2440 elaborated_type
2441 | type_qualifier_list
2442 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2443 elaborated_type
2444 { $$ = $3->addQualifiers( $1 ); }
2445 | sue_type_specifier type_qualifier
2446 {
2447 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2448 $$ = $1->addQualifiers( $2 );
2449 }
2450 ;
2451
2452sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2453 sue_type_specifier_nobody
2454 | declaration_qualifier_list sue_type_specifier_nobody
2455 { $$ = $2->addQualifiers( $1 ); }
2456 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2457 { $$ = $1->addQualifiers( $2 ); }
2458 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2459 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2460 ;
2461
2462sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2463 elaborated_type_nobody
2464 | type_qualifier_list elaborated_type_nobody
2465 { $$ = $2->addQualifiers( $1 ); }
2466 | sue_type_specifier_nobody type_qualifier
2467 { $$ = $1->addQualifiers( $2 ); }
2468 ;
2469
2470type_declaration_specifier:
2471 type_type_specifier
2472 | declaration_qualifier_list type_type_specifier
2473 { $$ = $2->addQualifiers( $1 ); }
2474 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2475 { $$ = $1->addQualifiers( $2 ); }
2476 | type_declaration_specifier storage_class type_qualifier_list
2477 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2478 ;
2479
2480type_type_specifier: // typedef types
2481 type_name
2482 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2483 | type_qualifier_list type_name
2484 { $$ = DeclarationNode::newFromTypeData( $2 )->addQualifiers( $1 ); }
2485 | type_type_specifier type_qualifier
2486 { $$ = $1->addQualifiers( $2 ); }
2487 ;
2488
2489type_name:
2490 TYPEDEFname
2491 { $$ = build_typedef( $1 ); }
2492 | '.' TYPEDEFname
2493 { $$ = build_qualified_type( build_global_scope(), build_typedef( $2 ) ); }
2494 | type_name '.' TYPEDEFname
2495 { $$ = build_qualified_type( $1, build_typedef( $3 ) ); }
2496 | typegen_name
2497 | '.' typegen_name
2498 { $$ = build_qualified_type( build_global_scope(), $2 ); }
2499 | type_name '.' typegen_name
2500 { $$ = build_qualified_type( $1, $3 ); }
2501 ;
2502
2503typegen_name: // CFA
2504 TYPEGENname
2505 { $$ = build_type_gen( $1, nullptr ); }
2506 | TYPEGENname '(' ')'
2507 { $$ = build_type_gen( $1, nullptr ); }
2508 | TYPEGENname '(' type_list ')'
2509 { $$ = build_type_gen( $1, $3 ); }
2510 ;
2511
2512elaborated_type: // struct, union, enum
2513 aggregate_type
2514 | enum_type
2515 ;
2516
2517elaborated_type_nobody: // struct, union, enum - {...}
2518 aggregate_type_nobody
2519 | enum_type_nobody
2520 ;
2521
2522// ************************** AGGREGATE *******************************
2523
2524aggregate_type: // struct, union
2525 aggregate_key attribute_list_opt
2526 { forall = false; } // reset
2527 '{' field_declaration_list_opt '}' type_parameters_opt
2528 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2529 | aggregate_key attribute_list_opt identifier
2530 {
2531 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2532 forall = false; // reset
2533 }
2534 '{' field_declaration_list_opt '}' type_parameters_opt
2535 {
2536 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2537 }
2538 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2539 {
2540 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2541 forall = false; // reset
2542 }
2543 '{' field_declaration_list_opt '}' type_parameters_opt
2544 {
2545 DeclarationNode::newFromTypeData( build_typedef( $3 ) );
2546 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2547 }
2548 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2549 {
2550 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2551 forall = false; // reset
2552 }
2553 '{' field_declaration_list_opt '}' type_parameters_opt
2554 {
2555 DeclarationNode::newFromTypeData( build_type_gen( $3, nullptr ) );
2556 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2557 }
2558 | aggregate_type_nobody
2559 ;
2560
2561type_parameters_opt:
2562 // empty
2563 { $$ = nullptr; } %prec '}'
2564 | '(' type_list ')'
2565 { $$ = $2; }
2566 ;
2567
2568aggregate_type_nobody: // struct, union - {...}
2569 aggregate_key attribute_list_opt identifier
2570 {
2571 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2572 forall = false; // reset
2573 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2574 }
2575 | aggregate_key attribute_list_opt type_name
2576 {
2577 forall = false; // reset
2578 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2579 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2580 // delete newFromTypeGen.
2581 if ( $3->kind == TypeData::SymbolicInst && ! $3->symbolic.isTypedef ) {
2582 $$ = DeclarationNode::newFromTypeData( $3 )->addQualifiers( $2 );
2583 } else {
2584 $$ = DeclarationNode::newAggregate( $1, $3->symbolic.name, $3->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2585 $3->symbolic.name = nullptr; // copied to $$
2586 $3->symbolic.actuals = nullptr;
2587 delete $3;
2588 }
2589 }
2590 ;
2591
2592aggregate_key:
2593 aggregate_data
2594 | aggregate_control
2595 ;
2596
2597aggregate_data:
2598 STRUCT vtable_opt
2599 { $$ = ast::AggregateDecl::Struct; }
2600 | UNION
2601 { $$ = ast::AggregateDecl::Union; }
2602 | EXCEPTION // CFA
2603 { $$ = ast::AggregateDecl::Exception; }
2604 ;
2605
2606aggregate_control: // CFA
2607 MONITOR
2608 { $$ = ast::AggregateDecl::Monitor; }
2609 | MUTEX STRUCT
2610 { $$ = ast::AggregateDecl::Monitor; }
2611 | GENERATOR
2612 { $$ = ast::AggregateDecl::Generator; }
2613 | MUTEX GENERATOR
2614 {
2615 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2616 $$ = ast::AggregateDecl::NoAggregate;
2617 }
2618 | COROUTINE
2619 { $$ = ast::AggregateDecl::Coroutine; }
2620 | MUTEX COROUTINE
2621 {
2622 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2623 $$ = ast::AggregateDecl::NoAggregate;
2624 }
2625 | THREAD
2626 { $$ = ast::AggregateDecl::Thread; }
2627 | MUTEX THREAD
2628 {
2629 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2630 $$ = ast::AggregateDecl::NoAggregate;
2631 }
2632 ;
2633
2634field_declaration_list_opt:
2635 // empty
2636 { $$ = nullptr; }
2637 | field_declaration_list_opt field_declaration
2638 { $$ = $1 ? $1->set_last( $2 ) : $2; }
2639 ;
2640
2641field_declaration:
2642 type_specifier field_declaring_list_opt ';'
2643 {
2644 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2645 $$ = fieldDecl( $1, $2 );
2646 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2647 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2648 // printf( "\tattr %s\n", attr->name.c_str() );
2649 // } // for
2650 }
2651 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2652 {
2653 SemanticError( yylloc, "syntax error, expecting ';' at end of previous declaration." );
2654 $$ = nullptr;
2655 }
2656 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2657 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2658 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2659 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2660 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2661 {
2662 if ( ! $3 ) { // field declarator ?
2663 $3 = DeclarationNode::newName( nullptr );
2664 } // if
2665 $3->inLine = true;
2666 $$ = distAttr( $2, $3 ); // mark all fields in list
2667 distInl( $3 );
2668 }
2669 | INLINE aggregate_control ';' // CFA
2670 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2671 | typedef_declaration ';' // CFA
2672 | cfa_field_declaring_list ';' // CFA, new style field declaration
2673 | EXTENSION cfa_field_declaring_list ';' // GCC
2674 { distExt( $2 ); $$ = $2; } // mark all fields in list
2675 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2676 { $$ = $2; } // mark all fields in list
2677 | cfa_typedef_declaration ';' // CFA
2678 | static_assert // C11
2679 ;
2680
2681field_declaring_list_opt:
2682 // empty
2683 { $$ = nullptr; }
2684 | field_declarator
2685 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2686 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2687 ;
2688
2689field_declarator:
2690 bit_subrange_size // C special case, no field name
2691 { $$ = DeclarationNode::newBitfield( $1 ); }
2692 | variable_declarator bit_subrange_size_opt
2693 // A semantic check is required to ensure bit_subrange only appears on integral types.
2694 { $$ = $1->addBitfield( $2 ); }
2695 | variable_type_redeclarator bit_subrange_size_opt
2696 // A semantic check is required to ensure bit_subrange only appears on integral types.
2697 { $$ = $1->addBitfield( $2 ); }
2698 | function_type_redeclarator bit_subrange_size_opt
2699 // A semantic check is required to ensure bit_subrange only appears on integral types.
2700 { $$ = $1->addBitfield( $2 ); }
2701 ;
2702
2703field_abstract_list_opt:
2704 // empty
2705 { $$ = nullptr; }
2706 | field_abstract
2707 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2708 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2709 ;
2710
2711field_abstract:
2712 // no bit fields
2713 variable_abstract_declarator
2714 ;
2715
2716cfa_field_declaring_list: // CFA, new style field declaration
2717 // bit-fields are handled by C declarations
2718 cfa_abstract_declarator_tuple identifier_or_type_name
2719 { $$ = $1->addName( $2 ); }
2720 | cfa_field_declaring_list ',' identifier_or_type_name
2721 { $$ = $1->set_last( $1->cloneType( $3 ) ); }
2722 ;
2723
2724cfa_field_abstract_list: // CFA, new style field declaration
2725 // bit-fields are handled by C declarations
2726 cfa_abstract_declarator_tuple
2727 | cfa_field_abstract_list ','
2728 { $$ = $1->set_last( $1->cloneType( 0 ) ); }
2729 ;
2730
2731bit_subrange_size_opt:
2732 // empty
2733 { $$ = nullptr; }
2734 | bit_subrange_size
2735 ;
2736
2737bit_subrange_size:
2738 ':' assignment_expression
2739 { $$ = $2; }
2740 ;
2741
2742// ************************** ENUMERATION *******************************
2743
2744enum_type:
2745 // anonymous, no type name
2746 ENUM attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2747 {
2748 if ( $3 == EnumHiding::Hide ) {
2749 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2750 } // if
2751 $$ = DeclarationNode::newEnum( nullptr, $5, true, false )->addQualifiers( $2 );
2752 }
2753 | ENUM enumerator_type attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2754 {
2755 if ( $2 && ($2->storageClasses.val != 0 || $2->type->qualifiers.any()) ) {
2756 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2757 }
2758 if ( $4 == EnumHiding::Hide ) {
2759 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2760 } // if
2761 $$ = DeclarationNode::newEnum( nullptr, $6, true, true, $2 )->addQualifiers( $3 );
2762 }
2763
2764 // named type
2765 | ENUM attribute_list_opt identifier
2766 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2767 hide_opt '{' enumerator_list comma_opt '}'
2768 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2769 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2770 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2771 | ENUM enumerator_type attribute_list_opt identifier attribute_list_opt
2772 {
2773 if ( $2 && ($2->storageClasses.any() || $2->type->qualifiers.val != 0) ) {
2774 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2775 }
2776 typedefTable.makeTypedef( *$4, "enum_type 2" );
2777 }
2778 hide_opt '{' enumerator_list comma_opt '}'
2779 { $$ = DeclarationNode::newEnum( $4, $9, true, true, $2, $7 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2780 | ENUM enumerator_type attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2781 { $$ = DeclarationNode::newEnum( $4->name, $8, true, true, $2, $6 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2782
2783 // forward declaration
2784 | enum_type_nobody
2785 ;
2786
2787enumerator_type:
2788 '(' ')' // pure enumeration
2789 { $$ = nullptr; }
2790 | '(' cfa_abstract_parameter_declaration ')' // typed enumeration
2791 { $$ = $2; }
2792 ;
2793
2794hide_opt:
2795 // empty
2796 { $$ = EnumHiding::Visible; }
2797 | '!'
2798 { $$ = EnumHiding::Hide; }
2799 ;
2800
2801enum_type_nobody: // enum - {...}
2802 ENUM attribute_list_opt identifier
2803 {
2804 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2805 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2806 }
2807 | ENUM attribute_list_opt type_name
2808 {
2809 typedefTable.makeTypedef( *$3->symbolic.name, "enum_type_nobody 2" );
2810 $$ = DeclarationNode::newEnum( $3->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2811 }
2812 ;
2813
2814enumerator_list:
2815 visible_hide_opt identifier_or_type_name enumerator_value_opt
2816 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2817 | INLINE type_name
2818 {
2819 $$ = DeclarationNode::newEnumInLine( $2->symbolic.name );
2820 $2->symbolic.name = nullptr;
2821 delete $2;
2822 }
2823 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2824 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2825 | enumerator_list ',' INLINE type_name enumerator_value_opt
2826 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( new string("inline"), nullptr ) ); }
2827 ;
2828
2829visible_hide_opt:
2830 hide_opt
2831 | '^'
2832 { $$ = EnumHiding::Visible; }
2833 ;
2834
2835enumerator_value_opt:
2836 // empty
2837 { $$ = nullptr; }
2838 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2839 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2840 // | simple_assignment_operator initializer
2841 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2842 ;
2843
2844// ************************** FUNCTION PARAMETERS *******************************
2845
2846parameter_list_ellipsis_opt:
2847 // empty
2848 { $$ = nullptr; }
2849 | ELLIPSIS
2850 { $$ = nullptr; }
2851 | parameter_list
2852 | parameter_list ',' ELLIPSIS
2853 { $$ = $1->addVarArgs(); }
2854 ;
2855
2856parameter_list: // abstract + real
2857 parameter_declaration
2858 | abstract_parameter_declaration
2859 | parameter_list ',' parameter_declaration
2860 { $$ = $1->set_last( $3 ); }
2861 | parameter_list ',' abstract_parameter_declaration
2862 { $$ = $1->set_last( $3 ); }
2863 ;
2864
2865cfa_parameter_list_ellipsis_opt: // CFA, abstract + real
2866 // empty
2867 { $$ = DeclarationNode::newFromTypeData( build_basic_type( TypeData::Void ) ); }
2868 | ELLIPSIS
2869 { $$ = nullptr; }
2870 | cfa_parameter_list
2871 | cfa_abstract_parameter_list
2872 | cfa_parameter_list ',' cfa_abstract_parameter_list
2873 { $$ = $1->set_last( $3 ); }
2874 | cfa_parameter_list ',' ELLIPSIS
2875 { $$ = $1->addVarArgs(); }
2876 | cfa_abstract_parameter_list ',' ELLIPSIS
2877 { $$ = $1->addVarArgs(); }
2878 ;
2879
2880cfa_parameter_list: // CFA
2881 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2882 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2883 cfa_parameter_declaration
2884 | cfa_abstract_parameter_list ',' cfa_parameter_declaration
2885 { $$ = $1->set_last( $3 ); }
2886 | cfa_parameter_list ',' cfa_parameter_declaration
2887 { $$ = $1->set_last( $3 ); }
2888 | cfa_parameter_list ',' cfa_abstract_parameter_list ',' cfa_parameter_declaration
2889 { $$ = $1->set_last( $3 )->set_last( $5 ); }
2890 ;
2891
2892cfa_abstract_parameter_list: // CFA, new & old style abstract
2893 cfa_abstract_parameter_declaration
2894 | cfa_abstract_parameter_list ',' cfa_abstract_parameter_declaration
2895 { $$ = $1->set_last( $3 ); }
2896 ;
2897
2898// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2899// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2900
2901parameter_declaration:
2902 // No SUE declaration in parameter list.
2903 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2904 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2905 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2906 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2907 ;
2908
2909abstract_parameter_declaration:
2910 declaration_specifier_nobody default_initializer_opt
2911 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2912 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2913 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2914 ;
2915
2916cfa_parameter_declaration: // CFA, new & old style parameter declaration
2917 parameter_declaration
2918 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2919 { $$ = $1->addName( $2 ); }
2920 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2921 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2922 { $$ = $1->addName( $2 ); }
2923 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2924 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2925 | cfa_function_specifier // int f( "int fp()" );
2926 ;
2927
2928cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2929 abstract_parameter_declaration
2930 | cfa_identifier_parameter_declarator_no_tuple
2931 | cfa_abstract_tuple
2932 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2933 | type_qualifier_list cfa_abstract_tuple
2934 { $$ = $2->addQualifiers( $1 ); }
2935 | cfa_abstract_function // int f( "int ()" );
2936 ;
2937
2938// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2939// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2940// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2941
2942identifier_list: // K&R-style parameter list => no types
2943 identifier
2944 { $$ = DeclarationNode::newName( $1 ); }
2945 | identifier_list ',' identifier
2946 { $$ = $1->set_last( DeclarationNode::newName( $3 ) ); }
2947 ;
2948
2949identifier_or_type_name:
2950 identifier
2951 | TYPEDEFname
2952 | TYPEGENname
2953 ;
2954
2955type_no_function: // sizeof, alignof, cast (constructor)
2956 cfa_abstract_declarator_tuple // CFA
2957 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2958 | type_specifier abstract_declarator
2959 { $$ = $2->addType( $1 ); }
2960 ;
2961
2962type: // typeof, assertion
2963 type_no_function
2964 | cfa_abstract_function // CFA
2965 ;
2966
2967initializer_opt:
2968 // empty
2969 { $$ = nullptr; }
2970 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2971 | '=' VOID { $$ = new InitializerNode( true ); }
2972 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2973 ;
2974
2975initializer:
2976 assignment_expression { $$ = new InitializerNode( $1 ); }
2977 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2978 ;
2979
2980initializer_list_opt:
2981 // empty
2982 { $$ = nullptr; }
2983 | initializer
2984 | designation initializer { $$ = $2->set_designators( $1 ); }
2985 | initializer_list_opt ',' initializer { $$ = $1->set_last( $3 ); }
2986 | initializer_list_opt ',' designation initializer { $$ = $1->set_last( $4->set_designators( $3 ) ); }
2987 ;
2988
2989// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2990// '=' to separator the designator from the initializer value, as in:
2991//
2992// int x[10] = { [1] = 3 };
2993//
2994// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2995// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2996// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2997// shift/reduce conflicts
2998
2999designation:
3000 designator_list ':' // C99, CFA uses ":" instead of "="
3001 | identifier_at ':' // GCC, field name
3002 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
3003 ;
3004
3005designator_list: // C99
3006 designator
3007 | designator_list designator
3008 { $$ = $1->set_last( $2 ); }
3009 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
3010 ;
3011
3012designator:
3013 '.' identifier_at // C99, field name
3014 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
3015 | '[' push assignment_expression pop ']' // C99, single array element
3016 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
3017 { $$ = $3; }
3018 | '[' push subrange pop ']' // CFA, multiple array elements
3019 { $$ = $3; }
3020 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
3021 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
3022 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
3023 { $$ = $4; }
3024 ;
3025
3026// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
3027// rather than an object-oriented type system. This required four groups of extensions:
3028//
3029// Overloading: function, data, and operator identifiers may be overloaded.
3030//
3031// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
3032// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
3033// definitions of new types. Type declarations with storage class "extern" provide opaque types.
3034//
3035// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
3036// site. A polymorphic function is not a template; it is a function, with an address and a type.
3037//
3038// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
3039// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
3040// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
3041// types provide the operations declared by a specification. Assertions are normally used to declare requirements
3042// on type arguments of polymorphic functions.
3043
3044type_parameter_list: // CFA
3045 type_parameter
3046 | type_parameter_list ',' type_parameter
3047 { $$ = $1->set_last( $3 ); }
3048 ;
3049
3050type_initializer_opt: // CFA
3051 // empty
3052 { $$ = nullptr; }
3053 | '=' type
3054 { $$ = $2; }
3055 ;
3056
3057type_parameter: // CFA
3058 type_class identifier_or_type_name
3059 {
3060 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
3061 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
3062 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
3063 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
3064 }
3065 type_initializer_opt assertion_list_opt
3066 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3067 | identifier_or_type_name new_type_class
3068 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
3069 type_initializer_opt assertion_list_opt
3070 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3071 | '[' identifier_or_type_name ']'
3072 {
3073 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
3074 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
3075 }
3076 // | type_specifier identifier_parameter_declarator
3077 | assertion_list
3078 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
3079 | ENUM '(' identifier_or_type_name ')' identifier_or_type_name new_type_class type_initializer_opt assertion_list_opt
3080 {
3081 typedefTable.addToScope( *$3, TYPEDIMname, "type_parameter 4" );
3082 typedefTable.addToScope( *$5, TYPEDIMname, "type_parameter 5" );
3083 $$ = DeclarationNode::newTypeParam( $6, $5 )->addTypeInitializer( $7 )->addAssertions( $8 );
3084 }
3085 ;
3086
3087new_type_class: // CFA
3088 // empty
3089 { $$ = ast::TypeDecl::Otype; }
3090 | '&'
3091 { $$ = ast::TypeDecl::Dtype; }
3092 | '*'
3093 { $$ = ast::TypeDecl::DStype; } // Dtype + sized
3094 // | '(' '*' ')' // Gregor made me do it
3095 // { $$ = ast::TypeDecl::Ftype; }
3096 | ELLIPSIS
3097 { $$ = ast::TypeDecl::Ttype; }
3098 ;
3099
3100type_class: // CFA
3101 OTYPE
3102 { $$ = ast::TypeDecl::Otype; }
3103 | DTYPE
3104 { $$ = ast::TypeDecl::Dtype; }
3105 | FTYPE
3106 { $$ = ast::TypeDecl::Ftype; }
3107 | TTYPE
3108 { $$ = ast::TypeDecl::Ttype; }
3109 ;
3110
3111assertion_list_opt: // CFA
3112 // empty
3113 { $$ = nullptr; }
3114 | assertion_list
3115 ;
3116
3117assertion_list: // CFA
3118 assertion
3119 | assertion_list assertion
3120 { $$ = $1->set_last( $2 ); }
3121 ;
3122
3123assertion: // CFA
3124 '|' identifier_or_type_name '(' type_list ')'
3125 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3126 | '|' '{' push trait_declaration_list pop '}'
3127 { $$ = $4; }
3128 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3129 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3130 ;
3131
3132type_list: // CFA
3133 type
3134 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3135 | assignment_expression
3136 | type_list ',' type
3137 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3138 | type_list ',' assignment_expression
3139 { $$ = $1->set_last( $3 ); }
3140 ;
3141
3142type_declaring_list: // CFA
3143 OTYPE type_declarator
3144 { $$ = $2; }
3145 | storage_class_list OTYPE type_declarator
3146 { $$ = $3->addQualifiers( $1 ); }
3147 | type_declaring_list ',' type_declarator
3148 { $$ = $1->set_last( $3->copySpecifiers( $1 ) ); }
3149 ;
3150
3151type_declarator: // CFA
3152 type_declarator_name assertion_list_opt
3153 { $$ = $1->addAssertions( $2 ); }
3154 | type_declarator_name assertion_list_opt '=' type
3155 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3156 ;
3157
3158type_declarator_name: // CFA
3159 identifier_or_type_name
3160 {
3161 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3162 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3163 }
3164 | identifier_or_type_name '(' type_parameter_list ')'
3165 {
3166 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3167 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3168 }
3169 ;
3170
3171trait_specifier: // CFA
3172 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3173 {
3174 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3175 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3176 }
3177 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3178 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3179 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3180 {
3181 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3182 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3183 }
3184 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3185 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3186 ;
3187
3188trait_declaration_list: // CFA
3189 trait_declaration
3190 | trait_declaration_list pop push trait_declaration
3191 { $$ = $1->set_last( $4 ); }
3192 ;
3193
3194trait_declaration: // CFA
3195 cfa_trait_declaring_list ';'
3196 | trait_declaring_list ';'
3197 ;
3198
3199cfa_trait_declaring_list: // CFA
3200 cfa_variable_specifier
3201 | cfa_function_specifier
3202 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3203 { $$ = $1->set_last( $1->cloneType( $5 ) ); }
3204 ;
3205
3206trait_declaring_list: // CFA
3207 type_specifier declarator
3208 { $$ = $2->addType( $1 ); }
3209 | trait_declaring_list pop ',' push declarator
3210 { $$ = $1->set_last( $1->cloneBaseType( $5 ) ); }
3211 ;
3212
3213// **************************** EXTERNAL DEFINITIONS *****************************
3214
3215translation_unit:
3216 // empty, input file
3217 | external_definition_list
3218 { parseTree = parseTree ? parseTree->set_last( $1 ) : $1; }
3219 ;
3220
3221external_definition_list:
3222 push external_definition pop
3223 { $$ = $2; }
3224 | external_definition_list push external_definition pop
3225 { $$ = $1 ? $1->set_last( $3 ) : $3; }
3226 ;
3227
3228external_definition_list_opt:
3229 // empty
3230 { $$ = nullptr; }
3231 | external_definition_list
3232 ;
3233
3234up:
3235 { typedefTable.up( forall ); forall = false; }
3236 ;
3237
3238down:
3239 { typedefTable.down(); }
3240 ;
3241
3242external_definition:
3243 DIRECTIVE
3244 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3245 | declaration
3246 {
3247 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3248 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3249 // disallowed at the moment.
3250 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static &&
3251 $1->type && $1->type->kind == TypeData::AggregateInst ) {
3252 if ( $1->type->aggInst.aggregate->aggregate.anon ) {
3253 SemanticError( yylloc, "extern anonymous aggregate is currently unimplemented." ); $$ = nullptr;
3254 }
3255 }
3256 }
3257 | IDENTIFIER IDENTIFIER
3258 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3259 | IDENTIFIER type_qualifier // invalid syntax rule
3260 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3261 | IDENTIFIER storage_class // invalid syntax rule
3262 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3263 | IDENTIFIER basic_type_name // invalid syntax rule
3264 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3265 | IDENTIFIER TYPEDEFname // invalid syntax rule
3266 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3267 | IDENTIFIER TYPEGENname // invalid syntax rule
3268 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3269 | external_function_definition
3270 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3271 {
3272 distExt( $2 ); // mark all fields in list
3273 $$ = $2;
3274 }
3275 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3276 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3277 | EXTERN STRINGliteral
3278 {
3279 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3280 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3281 }
3282 up external_definition down
3283 {
3284 linkage = linkageStack.top();
3285 linkageStack.pop();
3286 $$ = $5;
3287 }
3288 | EXTERN STRINGliteral // C++-style linkage specifier
3289 {
3290 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3291 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3292 }
3293 '{' up external_definition_list_opt down '}'
3294 {
3295 linkage = linkageStack.top();
3296 linkageStack.pop();
3297 $$ = $6;
3298 }
3299 // global distribution
3300 | type_qualifier_list
3301 {
3302 if ( $1->type->qualifiers.any() ) {
3303 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3304 }
3305 if ( $1->type->forall ) forall = true; // remember generic type
3306 }
3307 '{' up external_definition_list_opt down '}' // CFA, namespace
3308 {
3309 distQual( $5, $1 );
3310 forall = false;
3311 $$ = $5;
3312 }
3313 | declaration_qualifier_list
3314 {
3315 if ( $1->type && $1->type->qualifiers.any() ) {
3316 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3317 }
3318 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3319 }
3320 '{' up external_definition_list_opt down '}' // CFA, namespace
3321 {
3322 distQual( $5, $1 );
3323 forall = false;
3324 $$ = $5;
3325 }
3326 | declaration_qualifier_list type_qualifier_list
3327 {
3328 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3329 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3330 }
3331 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3332 }
3333 '{' up external_definition_list_opt down '}' // CFA, namespace
3334 {
3335 distQual( $6, $1->addQualifiers( $2 ) );
3336 forall = false;
3337 $$ = $6;
3338 }
3339 ;
3340
3341external_function_definition:
3342 function_definition
3343 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3344 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3345 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3346 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3347 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3348 | function_declarator compound_statement
3349 { $$ = $1->addFunctionBody( $2 ); }
3350 | KR_function_declarator KR_parameter_list_opt compound_statement
3351 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3352 ;
3353
3354with_clause_opt:
3355 // empty
3356 { $$ = nullptr; forall = false; }
3357 | WITH '(' tuple_expression_list ')' attribute_list_opt
3358 {
3359 $$ = $3; forall = false;
3360 if ( $5 ) {
3361 SemanticError( yylloc, "syntax error, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3362 $$ = nullptr;
3363 } // if
3364 }
3365 ;
3366
3367function_definition:
3368 cfa_function_declaration with_clause_opt compound_statement // CFA
3369 {
3370 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3371 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3372 $1->get_last()->addFunctionBody( $3, $2 );
3373 $$ = $1;
3374 }
3375 | declaration_specifier function_declarator with_clause_opt compound_statement
3376 {
3377 rebindForall( $1, $2 );
3378 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3379 }
3380 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3381 {
3382 rebindForall( $1, $2 );
3383 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3384 }
3385 // handles default int return type, OBSOLESCENT (see 1)
3386 | type_qualifier_list function_declarator with_clause_opt compound_statement
3387 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3388 // handles default int return type, OBSOLESCENT (see 1)
3389 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3390 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3391 // handles default int return type, OBSOLESCENT (see 1)
3392 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3393 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3394
3395 // Old-style K&R function definition, OBSOLESCENT (see 4)
3396 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3397 {
3398 rebindForall( $1, $2 );
3399 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3400 }
3401 // handles default int return type, OBSOLESCENT (see 1)
3402 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3403 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3404 // handles default int return type, OBSOLESCENT (see 1)
3405 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3406 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3407 // handles default int return type, OBSOLESCENT (see 1)
3408 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3409 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3410 ;
3411
3412declarator:
3413 variable_declarator
3414 | variable_type_redeclarator
3415 | function_declarator
3416 | function_type_redeclarator
3417 ;
3418
3419subrange:
3420 constant_expression '~' constant_expression // CFA, integer subrange
3421 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3422 ;
3423
3424// **************************** ASM *****************************
3425
3426asm_name_opt: // GCC
3427 // empty
3428 { $$ = nullptr; }
3429 | ASM '(' string_literal ')' attribute_list_opt
3430 {
3431 DeclarationNode * name = new DeclarationNode();
3432 name->asmName = maybeMoveBuild( $3 );
3433 $$ = name->addQualifiers( $5 );
3434 }
3435 ;
3436
3437// **************************** ATTRIBUTE *****************************
3438
3439attribute_list_opt: // GCC
3440 // empty
3441 { $$ = nullptr; }
3442 | attribute_list
3443 ;
3444
3445attribute_list: // GCC
3446 attribute
3447 | attribute_list attribute
3448 { $$ = $2->addQualifiers( $1 ); }
3449 ;
3450
3451attribute: // GCC
3452 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3453 { $$ = $4; }
3454 | ATTRIBUTE '(' attribute_name_list ')' // CFA
3455 { $$ = $3; }
3456 | ATTR '(' attribute_name_list ')' // CFA
3457 { $$ = $3; }
3458 ;
3459
3460attribute_name_list: // GCC
3461 attribute_name
3462 | attribute_name_list ',' attribute_name
3463 { $$ = $3->addQualifiers( $1 ); }
3464 ;
3465
3466attribute_name: // GCC
3467 // empty
3468 { $$ = nullptr; }
3469 | attr_name
3470 { $$ = DeclarationNode::newAttribute( $1 ); }
3471 | attr_name '(' argument_expression_list_opt ')'
3472 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3473 ;
3474
3475attr_name: // GCC
3476 IDENTIFIER
3477 | quasi_keyword
3478 | TYPEDEFname
3479 | TYPEGENname
3480 | FALLTHROUGH
3481 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3482 | CONST
3483 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3484 ;
3485
3486// ============================================================================
3487// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3488// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3489// in:
3490//
3491// int (*f())[10] { ... };
3492// ... (*f())[3] += 1; // definition mimics usage
3493//
3494// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3495// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3496// ============================================================================
3497
3498// ----------------------------------------------------------------------------
3499// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3500// to define a variable or function prototype, e.g.:
3501//
3502// valid declaration invalid definition
3503// ----------------- ------------------
3504// int f; int f {}
3505// int *f; int *f {}
3506// int f[10]; int f[10] {}
3507// int (*f)(int); int (*f)(int) {}
3508//
3509// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3510// variable_declarator and function_declarator.
3511// ----------------------------------------------------------------------------
3512
3513// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3514// declaring an array of functions versus a pointer to an array of functions.
3515
3516paren_identifier:
3517 identifier_at
3518 { $$ = DeclarationNode::newName( $1 ); }
3519 | '(' paren_identifier ')' // redundant parenthesis
3520 { $$ = $2; }
3521 ;
3522
3523variable_declarator:
3524 paren_identifier attribute_list_opt
3525 { $$ = $1->addQualifiers( $2 ); }
3526 | variable_ptr
3527 | variable_array attribute_list_opt
3528 { $$ = $1->addQualifiers( $2 ); }
3529 | variable_function attribute_list_opt
3530 { $$ = $1->addQualifiers( $2 ); }
3531 ;
3532
3533variable_ptr:
3534 ptrref_operator variable_declarator
3535 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3536 | ptrref_operator type_qualifier_list variable_declarator
3537 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3538 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3539 { $$ = $2->addQualifiers( $4 ); }
3540 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3541 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3542 ;
3543
3544variable_array:
3545 paren_identifier array_dimension
3546 { $$ = $1->addArray( $2 ); }
3547 | '(' variable_ptr ')' array_dimension
3548 { $$ = $2->addArray( $4 ); }
3549 | '(' attribute_list variable_ptr ')' array_dimension
3550 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3551 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3552 { $$ = $2->addArray( $4 ); }
3553 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3554 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3555 | '(' variable_array ')' // redundant parenthesis
3556 { $$ = $2; }
3557 | '(' attribute_list variable_array ')' // redundant parenthesis
3558 { $$ = $3->addQualifiers( $2 ); }
3559 ;
3560
3561variable_function:
3562 '(' variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3563 { $$ = $2->addParamList( $5 ); }
3564 | '(' attribute_list variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3565 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3566 | '(' variable_function ')' // redundant parenthesis
3567 { $$ = $2; }
3568 | '(' attribute_list variable_function ')' // redundant parenthesis
3569 { $$ = $3->addQualifiers( $2 ); }
3570 ;
3571
3572// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3573// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3574// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3575
3576function_declarator:
3577 function_no_ptr attribute_list_opt
3578 { $$ = $1->addQualifiers( $2 ); }
3579 | function_ptr
3580 | function_array attribute_list_opt
3581 { $$ = $1->addQualifiers( $2 ); }
3582 ;
3583
3584function_no_ptr:
3585 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3586 { $$ = $1->addParamList( $3 ); }
3587 | '(' function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3588 { $$ = $2->addParamList( $5 ); }
3589 | '(' attribute_list function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3590 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3591 | '(' function_no_ptr ')' // redundant parenthesis
3592 { $$ = $2; }
3593 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3594 { $$ = $3->addQualifiers( $2 ); }
3595 ;
3596
3597function_ptr:
3598 ptrref_operator function_declarator
3599 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3600 | ptrref_operator type_qualifier_list function_declarator
3601 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3602 | '(' function_ptr ')' attribute_list_opt
3603 { $$ = $2->addQualifiers( $4 ); }
3604 | '(' attribute_list function_ptr ')' attribute_list_opt
3605 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3606 ;
3607
3608function_array:
3609 '(' function_ptr ')' array_dimension
3610 { $$ = $2->addArray( $4 ); }
3611 | '(' attribute_list function_ptr ')' array_dimension
3612 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3613 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3614 { $$ = $2->addArray( $4 ); }
3615 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3616 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3617 | '(' function_array ')' // redundant parenthesis
3618 { $$ = $2; }
3619 | '(' attribute_list function_array ')' // redundant parenthesis
3620 { $$ = $3->addQualifiers( $2 ); }
3621 ;
3622
3623// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3624//
3625// f( a, b, c ) int a, *b, c[]; {}
3626//
3627// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3628// returning arrays and functions versus pointers to arrays and functions.
3629
3630KR_function_declarator:
3631 KR_function_no_ptr
3632 | KR_function_ptr
3633 | KR_function_array
3634 ;
3635
3636KR_function_no_ptr:
3637 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3638 { $$ = $1->addIdList( $3 ); }
3639 | '(' KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3640 { $$ = $2->addParamList( $5 ); }
3641 | '(' attribute_list KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3642 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3643 | '(' KR_function_no_ptr ')' // redundant parenthesis
3644 { $$ = $2; }
3645 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3646 { $$ = $3->addQualifiers( $2 ); }
3647 ;
3648
3649KR_function_ptr:
3650 ptrref_operator KR_function_declarator
3651 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3652 | ptrref_operator type_qualifier_list KR_function_declarator
3653 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3654 | '(' KR_function_ptr ')'
3655 { $$ = $2; }
3656 | '(' attribute_list KR_function_ptr ')'
3657 { $$ = $3->addQualifiers( $2 ); }
3658 ;
3659
3660KR_function_array:
3661 '(' KR_function_ptr ')' array_dimension
3662 { $$ = $2->addArray( $4 ); }
3663 | '(' attribute_list KR_function_ptr ')' array_dimension
3664 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3665 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3666 { $$ = $2->addArray( $4 ); }
3667 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3668 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3669 | '(' KR_function_array ')' // redundant parenthesis
3670 { $$ = $2; }
3671 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3672 { $$ = $3->addQualifiers( $2 ); }
3673 ;
3674
3675// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3676//
3677// typedef int foo;
3678// {
3679// int foo; // redefine typedef name in new scope
3680// }
3681
3682paren_type:
3683 typedef_name
3684 {
3685 // hide type name in enclosing scope by variable name
3686 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3687 }
3688 | '(' paren_type ')'
3689 { $$ = $2; }
3690 ;
3691
3692variable_type_redeclarator:
3693 paren_type attribute_list_opt
3694 { $$ = $1->addQualifiers( $2 ); }
3695 | variable_type_ptr
3696 | variable_type_array attribute_list_opt
3697 { $$ = $1->addQualifiers( $2 ); }
3698 | variable_type_function attribute_list_opt
3699 { $$ = $1->addQualifiers( $2 ); }
3700 ;
3701
3702variable_type_ptr:
3703 ptrref_operator variable_type_redeclarator
3704 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3705 | ptrref_operator type_qualifier_list variable_type_redeclarator
3706 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3707 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3708 { $$ = $2->addQualifiers( $4 ); }
3709 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3710 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3711 ;
3712
3713variable_type_array:
3714 paren_type array_dimension
3715 { $$ = $1->addArray( $2 ); }
3716 | '(' variable_type_ptr ')' array_dimension
3717 { $$ = $2->addArray( $4 ); }
3718 | '(' attribute_list variable_type_ptr ')' array_dimension
3719 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3720 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3721 { $$ = $2->addArray( $4 ); }
3722 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3723 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3724 | '(' variable_type_array ')' // redundant parenthesis
3725 { $$ = $2; }
3726 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3727 { $$ = $3->addQualifiers( $2 ); }
3728 ;
3729
3730variable_type_function:
3731 '(' variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3732 { $$ = $2->addParamList( $5 ); }
3733 | '(' attribute_list variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3734 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3735 | '(' variable_type_function ')' // redundant parenthesis
3736 { $$ = $2; }
3737 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3738 { $$ = $3->addQualifiers( $2 ); }
3739 ;
3740
3741// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3742// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3743// arrays and functions.
3744
3745function_type_redeclarator:
3746 function_type_no_ptr attribute_list_opt
3747 { $$ = $1->addQualifiers( $2 ); }
3748 | function_type_ptr
3749 | function_type_array attribute_list_opt
3750 { $$ = $1->addQualifiers( $2 ); }
3751 ;
3752
3753function_type_no_ptr:
3754 paren_type '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3755 { $$ = $1->addParamList( $3 ); }
3756 | '(' function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3757 { $$ = $2->addParamList( $5 ); }
3758 | '(' attribute_list function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3759 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3760 | '(' function_type_no_ptr ')' // redundant parenthesis
3761 { $$ = $2; }
3762 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3763 { $$ = $3->addQualifiers( $2 ); }
3764 ;
3765
3766function_type_ptr:
3767 ptrref_operator function_type_redeclarator
3768 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3769 | ptrref_operator type_qualifier_list function_type_redeclarator
3770 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3771 | '(' function_type_ptr ')' attribute_list_opt
3772 { $$ = $2->addQualifiers( $4 ); }
3773 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3774 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3775 ;
3776
3777function_type_array:
3778 '(' function_type_ptr ')' array_dimension
3779 { $$ = $2->addArray( $4 ); }
3780 | '(' attribute_list function_type_ptr ')' array_dimension
3781 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3782 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3783 { $$ = $2->addArray( $4 ); }
3784 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3785 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3786 | '(' function_type_array ')' // redundant parenthesis
3787 { $$ = $2; }
3788 | '(' attribute_list function_type_array ')' // redundant parenthesis
3789 { $$ = $3->addQualifiers( $2 ); }
3790 ;
3791
3792// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3793// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3794// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3795// pointers to arrays and functions.
3796
3797identifier_parameter_declarator:
3798 paren_identifier attribute_list_opt
3799 { $$ = $1->addQualifiers( $2 ); }
3800 | '&' MUTEX paren_identifier attribute_list_opt
3801 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3802 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3803 | identifier_parameter_ptr
3804 | identifier_parameter_array attribute_list_opt
3805 { $$ = $1->addQualifiers( $2 ); }
3806 | identifier_parameter_function attribute_list_opt
3807 { $$ = $1->addQualifiers( $2 ); }
3808 ;
3809
3810identifier_parameter_ptr:
3811 ptrref_operator identifier_parameter_declarator
3812 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3813 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3814 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3815 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3816 { $$ = $2->addQualifiers( $4 ); }
3817 ;
3818
3819identifier_parameter_array:
3820 paren_identifier array_parameter_dimension
3821 { $$ = $1->addArray( $2 ); }
3822 | '(' identifier_parameter_ptr ')' array_dimension
3823 { $$ = $2->addArray( $4 ); }
3824 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3825 { $$ = $2->addArray( $4 ); }
3826 | '(' identifier_parameter_array ')' // redundant parenthesis
3827 { $$ = $2; }
3828 ;
3829
3830identifier_parameter_function:
3831 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3832 { $$ = $1->addParamList( $3 ); }
3833 | '(' identifier_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3834 { $$ = $2->addParamList( $5 ); }
3835 | '(' identifier_parameter_function ')' // redundant parenthesis
3836 { $$ = $2; }
3837 ;
3838
3839// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3840// e.g.:
3841//
3842// typedef int foo;
3843// forall( otype T ) struct foo;
3844// int f( int foo ); // redefine typedef name in new scope
3845//
3846// and allows the C99 array options, which can only appear in a parameter list.
3847
3848type_parameter_redeclarator:
3849 typedef_name attribute_list_opt
3850 { $$ = $1->addQualifiers( $2 ); }
3851 | '&' MUTEX typedef_name attribute_list_opt
3852 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3853 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3854 | type_parameter_ptr
3855 | type_parameter_array attribute_list_opt
3856 { $$ = $1->addQualifiers( $2 ); }
3857 | type_parameter_function attribute_list_opt
3858 { $$ = $1->addQualifiers( $2 ); }
3859 ;
3860
3861typedef_name:
3862 TYPEDEFname
3863 { $$ = DeclarationNode::newName( $1 ); }
3864 | TYPEGENname
3865 { $$ = DeclarationNode::newName( $1 ); }
3866 ;
3867
3868type_parameter_ptr:
3869 ptrref_operator type_parameter_redeclarator
3870 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3871 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3872 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3873 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3874 { $$ = $2->addQualifiers( $4 ); }
3875 ;
3876
3877type_parameter_array:
3878 typedef_name array_parameter_dimension
3879 { $$ = $1->addArray( $2 ); }
3880 | '(' type_parameter_ptr ')' array_parameter_dimension
3881 { $$ = $2->addArray( $4 ); }
3882 ;
3883
3884type_parameter_function:
3885 typedef_name '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3886 { $$ = $1->addParamList( $3 ); }
3887 | '(' type_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3888 { $$ = $2->addParamList( $5 ); }
3889 ;
3890
3891// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3892// which the type applies, e.g.:
3893//
3894// sizeof( int );
3895// sizeof( int * );
3896// sizeof( int [10] );
3897// sizeof( int (*)() );
3898// sizeof( int () );
3899//
3900// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3901// and functions versus pointers to arrays and functions.
3902
3903abstract_declarator:
3904 abstract_ptr
3905 | abstract_array attribute_list_opt
3906 { $$ = $1->addQualifiers( $2 ); }
3907 | abstract_function attribute_list_opt
3908 { $$ = $1->addQualifiers( $2 ); }
3909 ;
3910
3911abstract_ptr:
3912 ptrref_operator
3913 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3914 | ptrref_operator type_qualifier_list
3915 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3916 | ptrref_operator abstract_declarator
3917 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3918 | ptrref_operator type_qualifier_list abstract_declarator
3919 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3920 | '(' abstract_ptr ')' attribute_list_opt
3921 { $$ = $2->addQualifiers( $4 ); }
3922 ;
3923
3924abstract_array:
3925 array_dimension
3926 | '(' abstract_ptr ')' array_dimension
3927 { $$ = $2->addArray( $4 ); }
3928 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3929 { $$ = $2->addArray( $4 ); }
3930 | '(' abstract_array ')' // redundant parenthesis
3931 { $$ = $2; }
3932 ;
3933
3934abstract_function:
3935 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3936 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3937 | '(' abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3938 { $$ = $2->addParamList( $5 ); }
3939 | '(' abstract_function ')' // redundant parenthesis
3940 { $$ = $2; }
3941 ;
3942
3943array_dimension:
3944 // Only the first dimension can be empty.
3945 '[' ']'
3946 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3947 | '[' ']' multi_array_dimension
3948 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3949 // Cannot use constant_expression because of tuples => semantic check
3950 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3951 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3952 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3953
3954 // If needed, the following parses and does not use comma_expression, so the array structure can be built.
3955 // | '[' push assignment_expression pop ',' push array_dimension_list pop ']' // CFA
3956
3957 | '[' push array_type_list pop ']' // CFA
3958 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3959 | multi_array_dimension
3960 ;
3961
3962// array_dimension_list:
3963// assignment_expression
3964// | array_dimension_list ',' assignment_expression
3965// ;
3966
3967array_type_list:
3968 basic_type_name
3969 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3970 | type_name
3971 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3972 | assignment_expression upupeq assignment_expression
3973 | array_type_list ',' basic_type_name
3974 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3975 | array_type_list ',' type_name
3976 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3977 | array_type_list ',' assignment_expression upupeq assignment_expression
3978 ;
3979
3980upupeq:
3981 '~'
3982 { $$ = OperKinds::LThan; }
3983 | ErangeUpEq
3984 { $$ = OperKinds::LEThan; }
3985 ;
3986
3987multi_array_dimension:
3988 '[' push assignment_expression pop ']'
3989 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3990 | '[' push '*' pop ']' // C99
3991 { $$ = DeclarationNode::newVarArray( 0 ); }
3992 | multi_array_dimension '[' push assignment_expression pop ']'
3993 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
3994 | multi_array_dimension '[' push '*' pop ']' // C99
3995 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3996 ;
3997
3998// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3999// identifier to which the type applies, e.g.:
4000//
4001// int f( int ); // not handled here
4002// int f( int * ); // abstract function-prototype parameter; no parameter name specified
4003// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
4004// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
4005//
4006// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
4007// and functions versus pointers to arrays and functions. In addition, the pattern handles the
4008// special meaning of parenthesis around a typedef name:
4009//
4010// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
4011// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
4012// not as redundant parentheses around the identifier."
4013//
4014// For example:
4015//
4016// typedef float T;
4017// int f( int ( T [5] ) ); // see abstract_parameter_declarator
4018// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
4019// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
4020// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
4021//
4022// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
4023// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
4024// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
4025// functions.
4026
4027abstract_parameter_declarator_opt:
4028 // empty
4029 { $$ = nullptr; }
4030 | abstract_parameter_declarator
4031 ;
4032
4033abstract_parameter_declarator:
4034 abstract_parameter_ptr
4035 | '&' MUTEX attribute_list_opt
4036 { $$ = DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
4037 OperKinds::AddressOf )->addQualifiers( $3 ); }
4038 | abstract_parameter_array attribute_list_opt
4039 { $$ = $1->addQualifiers( $2 ); }
4040 | abstract_parameter_function attribute_list_opt
4041 { $$ = $1->addQualifiers( $2 ); }
4042 ;
4043
4044abstract_parameter_ptr:
4045 ptrref_operator
4046 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4047 | ptrref_operator type_qualifier_list
4048 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4049 | ptrref_operator abstract_parameter_declarator
4050 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4051 | ptrref_operator type_qualifier_list abstract_parameter_declarator
4052 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4053 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
4054 { $$ = $2->addQualifiers( $4 ); }
4055 ;
4056
4057abstract_parameter_array:
4058 array_parameter_dimension
4059 | '(' abstract_parameter_ptr ')' array_parameter_dimension
4060 { $$ = $2->addArray( $4 ); }
4061 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
4062 { $$ = $2->addArray( $4 ); }
4063 | '(' abstract_parameter_array ')' // redundant parenthesis
4064 { $$ = $2; }
4065 ;
4066
4067abstract_parameter_function:
4068 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4069 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
4070 | '(' abstract_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4071 { $$ = $2->addParamList( $5 ); }
4072 | '(' abstract_parameter_function ')' // redundant parenthesis
4073 { $$ = $2; }
4074 ;
4075
4076array_parameter_dimension:
4077 // Only the first dimension can be empty or have qualifiers.
4078 array_parameter_1st_dimension
4079 | array_parameter_1st_dimension multi_array_dimension
4080 { $$ = $1->addArray( $2 ); }
4081 | multi_array_dimension
4082 ;
4083
4084// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
4085//
4086// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
4087// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
4088
4089array_parameter_1st_dimension:
4090 '[' ']'
4091 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
4092 // multi_array_dimension handles the '[' '*' ']' case
4093 | '[' push type_qualifier_list '*' pop ']' // remaining C99
4094 { $$ = DeclarationNode::newVarArray( $3 ); }
4095 | '[' push type_qualifier_list pop ']'
4096 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
4097 // multi_array_dimension handles the '[' assignment_expression ']' case
4098 | '[' push type_qualifier_list assignment_expression pop ']'
4099 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4100 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
4101 { $$ = DeclarationNode::newArray( $5, $4, true ); }
4102 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
4103 { $$ = DeclarationNode::newArray( $5, $3, true ); }
4104 ;
4105
4106// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
4107//
4108// struct S {
4109// int;
4110// int *;
4111// int [10];
4112// int (*)();
4113// };
4114
4115variable_abstract_declarator:
4116 variable_abstract_ptr
4117 | variable_abstract_array attribute_list_opt
4118 { $$ = $1->addQualifiers( $2 ); }
4119 | variable_abstract_function attribute_list_opt
4120 { $$ = $1->addQualifiers( $2 ); }
4121 ;
4122
4123variable_abstract_ptr:
4124 ptrref_operator
4125 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4126 | ptrref_operator type_qualifier_list
4127 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4128 | ptrref_operator variable_abstract_declarator
4129 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4130 | ptrref_operator type_qualifier_list variable_abstract_declarator
4131 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4132 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4133 { $$ = $2->addQualifiers( $4 ); }
4134 ;
4135
4136variable_abstract_array:
4137 array_dimension
4138 | '(' variable_abstract_ptr ')' array_dimension
4139 { $$ = $2->addArray( $4 ); }
4140 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4141 { $$ = $2->addArray( $4 ); }
4142 | '(' variable_abstract_array ')' // redundant parenthesis
4143 { $$ = $2; }
4144 ;
4145
4146variable_abstract_function:
4147 '(' variable_abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4148 { $$ = $2->addParamList( $5 ); }
4149 | '(' variable_abstract_function ')' // redundant parenthesis
4150 { $$ = $2; }
4151 ;
4152
4153// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4154// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4155
4156cfa_identifier_parameter_declarator_tuple: // CFA
4157 cfa_identifier_parameter_declarator_no_tuple
4158 | cfa_abstract_tuple
4159 | type_qualifier_list cfa_abstract_tuple
4160 { $$ = $2->addQualifiers( $1 ); }
4161 ;
4162
4163cfa_identifier_parameter_declarator_no_tuple: // CFA
4164 cfa_identifier_parameter_ptr
4165 | cfa_identifier_parameter_array
4166 ;
4167
4168cfa_identifier_parameter_ptr: // CFA
4169 // No SUE declaration in parameter list.
4170 ptrref_operator type_specifier_nobody
4171 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4172 | type_qualifier_list ptrref_operator type_specifier_nobody
4173 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4174 | ptrref_operator cfa_abstract_function
4175 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4176 | type_qualifier_list ptrref_operator cfa_abstract_function
4177 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4178 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4179 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4180 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4181 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4182 ;
4183
4184cfa_identifier_parameter_array: // CFA
4185 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4186 // shift/reduce conflict with new-style empty (void) function return type.
4187 '[' ']' type_specifier_nobody
4188 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4189 | cfa_array_parameter_1st_dimension type_specifier_nobody
4190 { $$ = $2->addNewArray( $1 ); }
4191 | '[' ']' multi_array_dimension type_specifier_nobody
4192 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4193 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4194 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4195 | multi_array_dimension type_specifier_nobody
4196 { $$ = $2->addNewArray( $1 ); }
4197
4198 | '[' ']' cfa_identifier_parameter_ptr
4199 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4200 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4201 { $$ = $2->addNewArray( $1 ); }
4202 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4203 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4204 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4205 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4206 | multi_array_dimension cfa_identifier_parameter_ptr
4207 { $$ = $2->addNewArray( $1 ); }
4208 ;
4209
4210cfa_array_parameter_1st_dimension:
4211 '[' push type_qualifier_list '*' pop ']' // remaining C99
4212 { $$ = DeclarationNode::newVarArray( $3 ); }
4213 | '[' push type_qualifier_list assignment_expression pop ']'
4214 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4215 | '[' push declaration_qualifier_list assignment_expression pop ']'
4216 // declaration_qualifier_list must be used because of shift/reduce conflict with
4217 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4218 // appear in this context.
4219 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4220 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4221 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4222 ;
4223
4224// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4225// identifier to which the type applies, e.g.:
4226//
4227// [int] f( int ); // abstract variable parameter; no parameter name specified
4228// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4229//
4230// These rules need LR(3):
4231//
4232// cfa_abstract_tuple identifier_or_type_name
4233// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
4234//
4235// since a function return type can be syntactically identical to a tuple type:
4236//
4237// [int, int] t;
4238// [int, int] f( int );
4239//
4240// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4241// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4242// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4243// duplicated when appearing with cfa_function_specifier.
4244
4245cfa_abstract_declarator_tuple: // CFA
4246 cfa_abstract_tuple
4247 | type_qualifier_list cfa_abstract_tuple
4248 { $$ = $2->addQualifiers( $1 ); }
4249 | cfa_abstract_declarator_no_tuple
4250 ;
4251
4252cfa_abstract_declarator_no_tuple: // CFA
4253 cfa_abstract_ptr
4254 | cfa_abstract_array
4255 ;
4256
4257cfa_abstract_ptr: // CFA
4258 ptrref_operator type_specifier
4259 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4260 | type_qualifier_list ptrref_operator type_specifier
4261 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4262 | ptrref_operator cfa_abstract_function
4263 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4264 | type_qualifier_list ptrref_operator cfa_abstract_function
4265 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4266 | ptrref_operator cfa_abstract_declarator_tuple
4267 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4268 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4269 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4270 ;
4271
4272cfa_abstract_array: // CFA
4273 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4274 // empty (void) function return type.
4275 '[' ']' type_specifier
4276 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4277 | '[' ']' multi_array_dimension type_specifier
4278 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4279 | multi_array_dimension type_specifier
4280 { $$ = $2->addNewArray( $1 ); }
4281 | '[' ']' cfa_abstract_ptr
4282 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4283 | '[' ']' multi_array_dimension cfa_abstract_ptr
4284 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4285 | multi_array_dimension cfa_abstract_ptr
4286 { $$ = $2->addNewArray( $1 ); }
4287 ;
4288
4289cfa_abstract_tuple: // CFA
4290 '[' push cfa_abstract_parameter_list pop ']'
4291 { $$ = DeclarationNode::newTuple( $3 ); }
4292 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4293 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4294 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4295 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4296 ;
4297
4298cfa_abstract_function: // CFA
4299 '[' ']' '(' cfa_parameter_list_ellipsis_opt ')'
4300 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4301 | cfa_abstract_tuple '(' push cfa_parameter_list_ellipsis_opt pop ')'
4302 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4303 | cfa_function_return '(' push cfa_parameter_list_ellipsis_opt pop ')'
4304 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4305 ;
4306
4307// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4308// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4309//
4310// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4311// the declaration specifiers in a declaration is an obsolescent feature."
4312//
4313// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4314// prototype-format parameter type declarators) is an obsolescent feature."
4315//
4316// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4317// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4318
4319// ************************ MISCELLANEOUS ********************************
4320
4321comma_opt: // redundant comma
4322 // empty
4323 | ','
4324 ;
4325
4326default_initializer_opt:
4327 // empty
4328 { $$ = nullptr; }
4329 | '=' assignment_expression
4330 { $$ = $2; }
4331 ;
4332
4333%%
4334
4335// ----end of grammar----
4336
4337// Local Variables: //
4338// mode: c++ //
4339// tab-width: 4 //
4340// compile-command: "bison -Wcounterexamples parser.yy" //
4341// End: //
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