source: src/Parser/parser.yy@ 41f4e2d

Last change on this file since 41f4e2d was a8ced63, checked in by Peter A. Buhr <pabuhr@…>, 19 months ago

parse countof pseduo-function, update for-loop for enumeration
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File size: 177.9 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// parser.yy --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Jun 20 21:34:49 2024
13// Update Count : 6654
14//
15
16// This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C
17// grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been
18// copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar.
19// In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax
20// that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks
21// required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions.
22
23// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24// the grammar.
25
26// The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for:
27//
28// designation with '=' (use ':' instead)
29//
30// This incompatibility is discussed in detail before the "designation" grammar rule. Most of the syntactic extensions
31// from ANSI90 to ANSI11 C are marked with the comment "C99/C11".
32
33// This grammar also has two levels of extensions. The first extensions cover most of the GCC C extensions. All of the
34// syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall (CFA), which
35// fixes several of C's outstanding problems and extends C with many modern language concepts. All of the syntactic
36// extensions for CFA C are marked with the comment "CFA".
37
38%{
39#define YYDEBUG_LEXER_TEXT( yylval ) // lexer loads this up each time
40#define YYDEBUG 1 // get the pretty debugging code to compile
41#define YYERROR_VERBOSE // more information in syntax errors
42
43#undef __GNUC_MINOR__
44
45#include <cstdio>
46#include <sstream>
47#include <stack>
48using namespace std;
49
50#include "DeclarationNode.hpp" // for DeclarationNode, ...
51#include "ExpressionNode.hpp" // for ExpressionNode, ...
52#include "InitializerNode.hpp" // for InitializerNode, ...
53#include "ParserTypes.hpp"
54#include "StatementNode.hpp" // for build_...
55#include "TypedefTable.hpp"
56#include "TypeData.hpp"
57#include "AST/Type.hpp" // for BasicType, BasicKind
58#include "Common/SemanticError.hpp" // error_str
59#include "Common/Utility.hpp" // for maybeMoveBuild, maybeBuild, CodeLo...
60
61// lex uses __null in a boolean context, it's fine.
62#ifdef __clang__
63#pragma GCC diagnostic ignored "-Wparentheses-equality"
64#endif
65
66extern DeclarationNode * parseTree;
67extern ast::Linkage::Spec linkage;
68extern TypedefTable typedefTable;
69
70stack<ast::Linkage::Spec> linkageStack;
71
72bool appendStr( string & to, string & from ) {
73 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
74 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
75 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
76 // easier to let the C compiler handle this case.
77 //
78 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
79 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
80 // e.g., u"a" U"b" L"c" is disallowed.
81
82 if ( from[0] != '"' ) { // encoding ?
83 if ( to[0] != '"' ) { // encoding ?
84 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
85 yyerror( "non-matching string encodings for string-literal concatenation" );
86 return false; // parse error, must call YYERROR in action
87 } else if ( from[1] == '8' ) {
88 from.erase( 0, 1 ); // remove 2nd encoding
89 } // if
90 } else {
91 if ( from[1] == '8' ) { // move encoding to start
92 to = "u8" + to;
93 from.erase( 0, 1 ); // remove 2nd encoding
94 } else {
95 to = from[0] + to;
96 } // if
97 } // if
98 from.erase( 0, 1 ); // remove 2nd encoding
99 } // if
100 to += " " + from; // concatenated into single string
101 return true;
102} // appendStr
103
104DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
105 // Distribute type specifier across all declared variables, e.g., static, const, __attribute__.
106 assert( declList );
107
108 // Do not distribute attributes for aggregates because the attributes surrounding the aggregate belong it not the
109 // variables in the declaration list, e.g.,
110 //
111 // struct __attribute__(( aligned(128) )) S { ...
112 // } v1 __attribute__(( aligned(64) )), v2 __attribute__(( aligned(32) )), v3;
113 // struct S v4;
114 //
115 // v1 => 64, v2 =>32, v3 => 128, v2 => 128
116 //
117 // Anonymous aggregates are a special case because there is no aggregate to bind the attribute to; hence it floats
118 // to the declaration list.
119 //
120 // struct __attribute__(( aligned(128) )) /*anonymous */ { ... } v1;
121 //
122 // v1 => 128
123
124 bool copyattr = ! (typeSpec->type && typeSpec->type->kind == TypeData::Aggregate && ! typeSpec->type->aggregate.anon );
125
126 // addType copies the type information for the aggregate instances from typeSpec into cl's aggInst.aggregate.
127 DeclarationNode * cl = (new DeclarationNode)->addType( typeSpec ); // typeSpec IS DELETED!!!
128
129 // Start at second variable in declaration list and clone the type specifiers for each variable.
130 for ( DeclarationNode * cur = declList->next ; cur != nullptr; cur = cur->next ) {
131 cl->cloneBaseType( cur, copyattr ); // cur is modified
132 } // for
133
134 // Add first variable in declaration list with hidden type information in aggInst.aggregate, which is used by
135 // extractType to recover the type for the aggregate instances.
136 declList->addType( cl, copyattr ); // cl IS DELETED!!!
137 return declList;
138} // distAttr
139
140void distExt( DeclarationNode * declaration ) {
141 // distribute EXTENSION across all declarations
142 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
143 iter->set_extension( true );
144 } // for
145} // distExt
146
147void distInl( DeclarationNode * declaration ) {
148 // distribute INLINE across all declarations
149 for ( DeclarationNode *iter = declaration ; iter != nullptr ; iter = iter->next ) {
150 iter->set_inLine( true );
151 } // for
152} // distInl
153
154void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
155 // distribute qualifiers across all non-variable declarations in a distribution statemement
156 for ( DeclarationNode * iter = declaration ; iter != nullptr ; iter = iter->next ) {
157 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
158 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
159 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
160 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
161 DeclarationNode * clone = qualifiers->clone();
162 if ( qualifiers->type ) { // forall clause ? (handles SC)
163 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
164 swap( clone->type->forall, iter->type->aggregate.params );
165 iter->addQualifiers( clone );
166 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
167 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
168 DeclarationNode newnode;
169 swap( newnode.type, iter->type->aggInst.aggregate );
170 swap( clone->type->forall, newnode.type->aggregate.params );
171 newnode.addQualifiers( clone );
172 swap( newnode.type, iter->type->aggInst.aggregate );
173 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
174 swap( clone->type->forall, iter->type->forall );
175 iter->addQualifiers( clone );
176 } // if
177 } else { // just SC qualifiers
178 iter->addQualifiers( clone );
179 } // if
180 } // for
181 delete qualifiers;
182} // distQual
183
184// There is an ambiguity for inline generic-routine return-types and generic routines.
185// forall( otype T ) struct S { int i; } bar( T ) {}
186// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
187// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
188// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
189// forall( otype T ) struct S { int T; };
190// forall( otype W ) bar( W ) {}
191
192void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
193 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
194 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
195 declSpec->type->aggregate.params = nullptr;
196 } // if
197} // rebindForall
198
199string * build_postfix_name( string * name ) {
200 *name = string("__postfix_func_") + *name;
201 return name;
202} // build_postfix_name
203
204DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
205 if ( nullptr == fieldList ) {
206 if ( !( typeSpec->type && typeSpec->type->kind == TypeData::Aggregate ) ) {
207 stringstream ss;
208 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
209 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
210 return nullptr;
211 } // if
212 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
213 fieldList = DeclarationNode::newName( nullptr );
214 } // if
215
216 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
217 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
218 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
219 return temp;
220} // fieldDecl
221
222#define NEW_ZERO new ExpressionNode( build_constantInteger( yylloc, *new string( "0" ) ) )
223#define NEW_ONE new ExpressionNode( build_constantInteger( yylloc, *new string( "1" ) ) )
224#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
225#define MISSING_ANON_FIELD "syntax error, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
226#define MISSING_LOW "syntax error, missing low value for up-to range so index is uninitialized."
227#define MISSING_HIGH "syntax error, missing high value for down-to range so index is uninitialized."
228
229static ForCtrl * makeForCtrl(
230 const CodeLocation & location,
231 DeclarationNode * init,
232 enum OperKinds compop,
233 ExpressionNode * comp,
234 ExpressionNode * inc ) {
235 // Wrap both comp/inc if they are non-null.
236 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
237 compop,
238 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
239 comp ) );
240 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
241 // choose += or -= for upto/downto
242 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
243 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
244 inc ) );
245 // The StatementNode call frees init->name, it must happen later.
246 return new ForCtrl( new StatementNode( init ), comp, inc );
247}
248
249ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
250 if ( index->initializer ) {
251 SemanticError( yylloc, "syntax error, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
252 } // if
253 if ( index->next ) {
254 SemanticError( yylloc, "syntax error, multiple loop indexes disallowed in for-loop declaration." );
255 } // if
256 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
257 return makeForCtrl( location, initDecl, compop, comp, inc );
258} // forCtrl
259
260ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
261 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
262 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
263 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicKind::SignedInt ) ) );
264 } // if
265 DeclarationNode * initDecl = distAttr(
266 DeclarationNode::newTypeof( type, true ),
267 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
268 );
269 return makeForCtrl( location, initDecl, compop, comp, inc );
270} // forCtrl
271
272ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
273 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
274 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
275 } else if ( auto commaExpr = dynamic_cast<ast::CommaExpr *>( index->expr.get() ) ) {
276 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
277 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
278 } else {
279 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
280 } // if
281 } else {
282 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
283 } // if
284} // forCtrl
285
286ForCtrl * enumRangeCtrl( ExpressionNode * index_expr, ExpressionNode * range_over_expr ) {
287 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index_expr->expr.get()) ) {
288 DeclarationNode * indexDecl =
289 DeclarationNode::newName( new std::string(identifier->name) );
290 assert( range_over_expr );
291 auto node = new StatementNode( indexDecl ); // <- this cause this error
292 return new ForCtrl( node, range_over_expr );
293 } else if (auto commaExpr = dynamic_cast<ast::CommaExpr *>( index_expr->expr.get() )) {
294 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
295 assert( range_over_expr );
296 DeclarationNode * indexDecl = distAttr(
297 DeclarationNode::newTypeof( range_over_expr, true ),
298 DeclarationNode::newName( new std::string( identifier->name) ) );
299 return new ForCtrl( new StatementNode( indexDecl ), range_over_expr );
300 } else {
301 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
302 } // if
303 } else {
304 assert( false );
305 } // if
306} // enumRangeCtrl
307
308static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
309 SemanticError( yylloc, "syntax error, adjacent identifiers \"%s\" and \"%s\" are not meaningful in an %s.\n"
310 "Possible cause is misspelled type name or missing generic parameter.",
311 identifier1.c_str(), identifier2.c_str(), kind );
312} // IdentifierBeforeIdentifier
313
314static void IdentifierBeforeType( string & identifier, const char * kind ) {
315 SemanticError( yylloc, "syntax error, identifier \"%s\" cannot appear before a %s.\n"
316 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter.",
317 identifier.c_str(), kind );
318} // IdentifierBeforeType
319
320bool forall = false; // aggregate have one or more forall qualifiers ?
321
322// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
323#define YYLLOC_DEFAULT(Cur, Rhs, N) \
324if ( N ) { \
325 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
326 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
327 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
328 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
329 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
330} else { \
331 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
332 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
333 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
334}
335%}
336
337%define parse.error verbose
338
339// Types declaration for productions
340
341%union {
342 // A raw token can be used.
343 Token tok;
344
345 // The general node types hold some generic node or list of nodes.
346 DeclarationNode * decl;
347 InitializerNode * init;
348 ExpressionNode * expr;
349 StatementNode * stmt;
350 ClauseNode * clause;
351 TypeData * type;
352
353 // Special "nodes" containing compound information.
354 CondCtl * ifctl;
355 ForCtrl * forctl;
356 LabelNode * labels;
357
358 // Various flags and single values that become fields later.
359 ast::AggregateDecl::Aggregate aggKey;
360 ast::TypeDecl::Kind tclass;
361 OperKinds oper;
362 bool is_volatile;
363 EnumHiding enum_hiding;
364 ast::ExceptionKind except_kind;
365 // String passes ownership with it.
366 std::string * str;
367
368 // Narrower node types are used to avoid constant unwrapping.
369 ast::WaitForStmt * wfs;
370 ast::WaitUntilStmt::ClauseNode * wucn;
371 ast::GenericExpr * genexpr;
372}
373
374// ************************ TERMINAL TOKENS ********************************
375
376// keywords
377%token TYPEDEF
378%token EXTERN STATIC AUTO REGISTER
379%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
380%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
381%token NORETURN // C11
382%token CONST VOLATILE
383%token RESTRICT // C99
384%token ATOMIC // C11
385%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
386%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
387%token BOOL COMPLEX IMAGINARY // C99
388%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
389%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
390%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
391%token ZERO_T ONE_T // CFA
392%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE COUNTOF // GCC
393%token OFFSETOF BASETYPEOF TYPEID // CFA
394%token ENUM STRUCT UNION
395%token EXCEPTION // CFA
396%token GENERATOR COROUTINE MONITOR THREAD // CFA
397%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
398// %token RESUME // CFA
399%token LABEL // GCC
400%token SUSPEND // CFA
401%token ATTRIBUTE EXTENSION // GCC
402%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
403%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
404%token CORUN COFOR
405%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
406%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
407%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
408
409// names and constants: lexer differentiates between identifier and typedef names
410%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
411%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
412%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
413%token<tok> DIRECTIVE
414// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
415// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
416// converted into the tuple index (.)(1). e.g., 3.x
417%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
418
419// multi-character operators
420%token ARROW // ->
421%token ICR DECR // ++ --
422%token LS RS // << >>
423%token LE GE EQ NE // <= >= == !=
424%token ANDAND OROR // && ||
425%token ATTR ELLIPSIS // @@ ...
426
427%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
428%token PLUSassign MINUSassign // += -=
429%token LSassign RSassign // <<= >>=
430%token ANDassign ERassign ORassign // &= ^= |=
431
432%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
433%token ATassign // @=
434
435%type<tok> identifier identifier_at identifier_or_type_name attr_name
436%type<tok> quasi_keyword
437%type<expr> string_literal
438%type<str> string_literal_list
439
440%type<enum_hiding> hide_opt visible_hide_opt
441
442// expressions
443%type<expr> constant
444%type<expr> tuple tuple_expression_list
445%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
446%type<expr> primary_expression postfix_expression unary_expression
447%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
448%type<expr> shift_expression relational_expression equality_expression
449%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
450%type<expr> logical_AND_expression logical_OR_expression
451%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
452%type<expr> comma_expression comma_expression_opt
453%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
454%type<ifctl> conditional_declaration
455%type<forctl> for_control_expression for_control_expression_list
456%type<oper> upupeq updown updowneq downupdowneq
457%type<expr> subrange
458%type<decl> asm_name_opt
459%type<expr> asm_operands_opt asm_operands_list asm_operand
460%type<labels> label_list
461%type<expr> asm_clobbers_list_opt
462%type<is_volatile> asm_volatile_opt
463%type<expr> handler_predicate_opt
464%type<genexpr> generic_association generic_assoc_list
465
466// statements
467%type<stmt> statement labeled_statement compound_statement
468%type<stmt> statement_decl statement_decl_list statement_list_nodecl
469%type<stmt> selection_statement
470%type<clause> switch_clause_list_opt switch_clause_list
471%type<expr> case_value
472%type<clause> case_clause case_value_list case_label case_label_list
473%type<stmt> iteration_statement jump_statement
474%type<stmt> expression_statement asm_statement
475%type<stmt> with_statement
476%type<expr> with_clause_opt
477%type<stmt> corun_statement cofor_statement
478%type<stmt> exception_statement
479%type<clause> handler_clause finally_clause
480%type<except_kind> handler_key
481%type<stmt> mutex_statement
482%type<expr> when_clause when_clause_opt waitfor waituntil timeout
483%type<stmt> waitfor_statement waituntil_statement
484%type<wfs> wor_waitfor_clause
485%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
486
487// declarations
488%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
489%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
490%type<decl> abstract_parameter_declaration
491
492%type<aggKey> aggregate_key aggregate_data aggregate_control
493%type<decl> aggregate_type aggregate_type_nobody
494
495%type<decl> assertion assertion_list assertion_list_opt
496
497%type<expr> bit_subrange_size_opt bit_subrange_size
498
499%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
500%type<type> basic_type_name_type
501%type<type> vtable vtable_opt default_opt
502
503%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
504
505%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
506%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
507
508%type<decl> elaborated_type elaborated_type_nobody
509
510%type<decl> enumerator_list enum_type enum_type_nobody enum_key enumerator_type
511%type<init> enumerator_value_opt
512
513%type<decl> external_definition external_definition_list external_definition_list_opt
514
515%type<decl> exception_declaration
516
517%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
518%type<expr> field field_name_list field_name fraction_constants_opt
519
520%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
521
522%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
523%type<decl> identifier_list
524
525%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
526%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
527%type<decl> cfa_abstract_ptr cfa_abstract_tuple
528
529%type<decl> cfa_array_parameter_1st_dimension
530
531%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
532%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
533
534%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
535%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
536
537%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_list_ellipsis_opt
538
539%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
540
541%type<decl> c_declaration static_assert
542%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
543%type<decl> KR_parameter_list KR_parameter_list_opt
544
545%type<decl> parameter_declaration parameter_list parameter_list_ellipsis_opt
546
547%type<decl> paren_identifier paren_type
548
549%type<decl> storage_class storage_class_list
550
551%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
552
553%type<tclass> type_class new_type_class
554%type<decl> type_declarator type_declarator_name type_declaring_list
555
556%type<decl> type_declaration_specifier type_type_specifier
557%type<type> type_name typegen_name
558%type<decl> typedef_name typedef_declaration typedef_expression
559
560%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
561%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
562
563%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
564
565%type<decl> type type_no_function
566%type<decl> type_parameter type_parameter_list type_initializer_opt
567
568%type<expr> type_parameters_opt type_list array_type_list // array_dimension_list
569
570%type<decl> type_qualifier forall type_qualifier_list_opt type_qualifier_list
571%type<type> type_qualifier_name
572%type<decl> type_specifier type_specifier_nobody
573
574%type<decl> variable_declarator variable_ptr variable_array variable_function
575%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
576
577%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
578
579// initializers
580%type<init> initializer initializer_list_opt initializer_opt
581
582// designators
583%type<expr> designator designator_list designation
584
585
586// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
587// .---------. matches IF '(' comma_expression ')' statement . (reduce)
588// if ( C ) S1 else S2
589// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
590// Similar issues exit with the waitfor statement.
591
592// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
593// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
594%precedence THEN // rule precedence for IF/WAITFOR statement
595%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
596%precedence WAND // token precedence for start of WAND in WAITFOR statement
597%precedence OROR // token precedence for start of WOR in WAITFOR statement
598%precedence WOR // token precedence for start of WOR in WAITFOR statement
599%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
600%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
601%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
602%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
603%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
604%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
605%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
606
607
608// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
609// forall( otype T ) struct Foo { T v; };
610// .-----. matches pointer to function returning a generic (which is impossible without a type)
611// Foo ( *fp )( int );
612// `---' matches start of TYPEGENname '('
613// must be:
614// Foo( int ) ( *fp )( int );
615// The same problem occurs here:
616// forall( otype T ) struct Foo { T v; } ( *fp )( int );
617// must be:
618// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
619
620// Order of these lines matters (low-to-high precedence).
621%precedence TYPEGENname
622%precedence '}'
623%precedence '('
624
625// %precedence RESUME
626// %precedence '{'
627// %precedence ')'
628
629%locations // support location tracking for error messages
630
631%start translation_unit // parse-tree root
632
633%%
634// ************************ Namespace Management ********************************
635
636// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
637// which are lexically identical.
638//
639// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
640// foo f; // to allow it to appear in this context
641//
642// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
643// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
644// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
645// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
646// must be distinguished by the lexical scanner.
647//
648// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
649// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
650// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
651// each context that introduces a name scope, a new level is created in the type table and that level is popped on
652// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
653// This requires distinguishing between type names that are local to the current declaration scope and those that
654// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
655//
656// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
657// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
658// around the list separator.
659//
660// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
661// push pop push pop
662
663push:
664 { typedefTable.enterScope(); }
665 ;
666
667pop:
668 { typedefTable.leaveScope(); }
669 ;
670
671// ************************ CONSTANTS ********************************
672
673constant:
674 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
675 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
676 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
677 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
678 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
679 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
680 ;
681
682quasi_keyword: // CFA
683 TIMEOUT
684 | WAND
685 | WOR
686 | CATCH
687 | RECOVER
688 | CATCHRESUME
689 | FIXUP
690 | FINALLY
691 ;
692
693identifier:
694 IDENTIFIER
695 | quasi_keyword
696 ;
697
698identifier_at:
699 identifier
700 | '@' // CFA
701 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
702 ;
703
704identifier_or_type_name:
705 identifier
706 | TYPEDEFname
707 | TYPEGENname
708 ;
709
710string_literal:
711 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
712 ;
713
714string_literal_list: // juxtaposed strings are concatenated
715 STRINGliteral { $$ = $1; } // conversion from tok to str
716 | string_literal_list STRINGliteral
717 {
718 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
719 delete $2; // allocated by lexer
720 $$ = $1; // conversion from tok to str
721 }
722 ;
723
724// ************************ EXPRESSIONS ********************************
725
726primary_expression:
727 IDENTIFIER // typedef name cannot be used as a variable name
728 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
729 | quasi_keyword
730 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
731 | TYPEDIMname // CFA, generic length argument
732 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
733 | tuple
734 | '(' comma_expression ')'
735 { $$ = $2; }
736 | '(' compound_statement ')' // GCC, lambda expression
737 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
738 | type_name '.' identifier // CFA, nested type
739 { $$ = new ExpressionNode( build_qualified_expr( yylloc, DeclarationNode::newFromTypeData( $1 ), build_varref( yylloc, $3 ) ) ); }
740 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
741 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
742 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
743 {
744 // add the missing control expression to the GenericExpr and return it
745 $5->control = maybeMoveBuild( $3 );
746 $$ = new ExpressionNode( $5 );
747 }
748 // | RESUME '(' comma_expression ')'
749 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
750 // | RESUME '(' comma_expression ')' compound_statement
751 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
752 | IDENTIFIER IDENTIFIER // invalid syntax rule
753 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "expression" ); $$ = nullptr; }
754 | IDENTIFIER type_qualifier // invalid syntax rule
755 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
756 | IDENTIFIER storage_class // invalid syntax rule
757 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
758 | IDENTIFIER basic_type_name // invalid syntax rule
759 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
760 | IDENTIFIER TYPEDEFname // invalid syntax rule
761 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
762 | IDENTIFIER TYPEGENname // invalid syntax rule
763 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
764 ;
765
766generic_assoc_list: // C11
767 generic_association
768 | generic_assoc_list ',' generic_association
769 {
770 // steal the association node from the singleton and delete the wrapper
771 assert( 1 == $3->associations.size() );
772 $1->associations.push_back( $3->associations.front() );
773 delete $3;
774 $$ = $1;
775 }
776 ;
777
778generic_association: // C11
779 type_no_function ':' assignment_expression
780 {
781 // create a GenericExpr wrapper with one association pair
782 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
783 }
784 | DEFAULT ':' assignment_expression
785 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
786 ;
787
788postfix_expression:
789 primary_expression
790 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
791 // Historic, transitional: Disallow commas in subscripts.
792 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
793 // Current: Commas in subscripts make tuples.
794 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, $3->set_last( $5 ) ) ) ) ); }
795 | postfix_expression '[' assignment_expression ']'
796 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
797 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
798 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
799 // equivalent to the old x[i,j].
800 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
801 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
802 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
803 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
804 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
805 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
806 {
807 Token fn;
808 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
809 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $1->set_last( $3 ) ) ) );
810 }
811 | postfix_expression '(' argument_expression_list_opt ')'
812 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
813 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
814 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
815 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg" ) ) ),
816 $3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) ) ) ); }
817 | postfix_expression '`' identifier // CFA, postfix call
818 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
819 | constant '`' identifier // CFA, postfix call
820 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
821 | string_literal '`' identifier // CFA, postfix call
822 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
823
824 // SKULLDUGGERY: The typedef table used for parsing does not store fields in structures. To parse a qualified
825 // name, it is assumed all name-tokens after the first are identifiers, regardless of how the lexer identifies
826 // them. For example:
827 //
828 // struct S;
829 // forall(T) struct T;
830 // union U;
831 // enum E { S, T, E };
832 // struct Z { int S, T, Z, E, U; };
833 // void fred () {
834 // Z z;
835 // z.S; // lexer returns S is TYPEDEFname
836 // z.T; // lexer returns T is TYPEGENname
837 // z.Z; // lexer returns Z is TYPEDEFname
838 // z.U; // lexer returns U is TYPEDEFname
839 // z.E; // lexer returns E is TYPEDEFname
840 // }
841 | postfix_expression '.' identifier_or_type_name
842 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
843
844 | postfix_expression '.' INTEGERconstant // CFA, tuple index
845 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
846 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
847 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
848 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
849 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
850 | postfix_expression '.' aggregate_control
851 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
852 | postfix_expression ARROW identifier
853 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
854 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
855 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
856 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
857 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
858 | postfix_expression ICR
859 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
860 | postfix_expression DECR
861 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
862 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
863 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
864 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
865 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
866 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
867 {
868 Token fn;
869 fn.str = new string( "^?{}" ); // location undefined
870 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), $2->set_last( $4 ) ) );
871 }
872 ;
873
874argument_expression_list_opt:
875 // empty
876 { $$ = nullptr; }
877 | argument_expression_list
878 ;
879
880argument_expression_list:
881 argument_expression
882 | argument_expression_list_opt ',' argument_expression
883 { $$ = $1->set_last( $3 ); }
884 ;
885
886argument_expression:
887 '@' // CFA, default parameter
888 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
889 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
890 | assignment_expression
891 ;
892
893field_name_list: // CFA, tuple field selector
894 field
895 | field_name_list ',' field { $$ = $1->set_last( $3 ); }
896 ;
897
898field: // CFA, tuple field selector
899 field_name
900 | FLOATING_DECIMALconstant field
901 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
902 | FLOATING_DECIMALconstant '[' field_name_list ']'
903 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
904 | field_name '.' field
905 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
906 | field_name '.' '[' field_name_list ']'
907 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
908 | field_name ARROW field
909 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
910 | field_name ARROW '[' field_name_list ']'
911 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
912 ;
913
914field_name:
915 INTEGERconstant fraction_constants_opt
916 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
917 | FLOATINGconstant fraction_constants_opt
918 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
919 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
920 {
921 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
922 }
923 ;
924
925fraction_constants_opt:
926 // empty
927 { $$ = nullptr; }
928 | fraction_constants_opt FLOATING_FRACTIONconstant
929 {
930 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
931 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
932 }
933 ;
934
935unary_expression:
936 postfix_expression
937 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
938 // semantics checks, e.g., ++3, 3--, *3, &&3
939 | constant
940 | string_literal
941 { $$ = $1; }
942 | EXTENSION cast_expression // GCC
943 { $$ = $2->set_extension( true ); }
944 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
945 // { * X; } // dereference X
946 // { * int X; } // CFA declaration of pointer to int
947 | ptrref_operator cast_expression // CFA
948 {
949 switch ( $1 ) {
950 case OperKinds::AddressOf:
951 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
952 break;
953 case OperKinds::PointTo:
954 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
955 break;
956 case OperKinds::And:
957 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
958 break;
959 default:
960 assert( false );
961 }
962 }
963 | unary_operator cast_expression
964 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
965 | ICR unary_expression
966 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
967 | DECR unary_expression
968 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
969 | SIZEOF unary_expression
970 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
971 | SIZEOF '(' type_no_function ')'
972 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
973 | ALIGNOF unary_expression // GCC, variable alignment
974 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
975 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
976 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
977
978 // Cannot use rule "type", which includes cfa_abstract_function, for sizeof/alignof, because of S/R problems on
979 // look ahead, so the cfa_abstract_function is factored out.
980 | SIZEOF '(' cfa_abstract_function ')'
981 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
982 | ALIGNOF '(' cfa_abstract_function ')' // GCC, type alignment
983 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
984
985 | OFFSETOF '(' type_no_function ',' identifier ')'
986 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
987 | TYPEID '(' type ')'
988 {
989 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
990 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
991 }
992 | COUNTOF '(' type_no_function ')'
993 { $$ = new ExpressionNode( new ast::CountExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
994 | COUNTOF unary_expression
995 { SemanticError( yylloc, "countof for expressions is currently unimplemented. "); $$ = nullptr; }
996 ;
997
998ptrref_operator:
999 '*' { $$ = OperKinds::PointTo; }
1000 | '&' { $$ = OperKinds::AddressOf; }
1001 // GCC, address of label must be handled by semantic check for ref,ref,label
1002 | ANDAND { $$ = OperKinds::And; }
1003 ;
1004
1005unary_operator:
1006 '+' { $$ = OperKinds::UnPlus; }
1007 | '-' { $$ = OperKinds::UnMinus; }
1008 | '!' { $$ = OperKinds::Neg; }
1009 | '~' { $$ = OperKinds::BitNeg; }
1010 ;
1011
1012cast_expression:
1013 unary_expression
1014 | '(' type_no_function ')' cast_expression
1015 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
1016 | '(' aggregate_control '&' ')' cast_expression // CFA
1017 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
1018 | '(' aggregate_control '*' ')' cast_expression // CFA
1019 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
1020 | '(' VIRTUAL ')' cast_expression // CFA
1021 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), nullptr ) ); }
1022 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
1023 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
1024 | '(' RETURN type_no_function ')' cast_expression // CFA
1025 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
1026 | '(' COERCE type_no_function ')' cast_expression // CFA
1027 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
1028 | '(' qualifier_cast_list ')' cast_expression // CFA
1029 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
1030// | '(' type_no_function ')' tuple
1031// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
1032 ;
1033
1034qualifier_cast_list:
1035 cast_modifier type_qualifier_name
1036 | cast_modifier MUTEX
1037 | qualifier_cast_list cast_modifier type_qualifier_name
1038 | qualifier_cast_list cast_modifier MUTEX
1039 ;
1040
1041cast_modifier:
1042 '-'
1043 | '+'
1044 ;
1045
1046exponential_expression:
1047 cast_expression
1048 | exponential_expression '\\' cast_expression
1049 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
1050 ;
1051
1052multiplicative_expression:
1053 exponential_expression
1054 | multiplicative_expression '*' exponential_expression
1055 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
1056 | multiplicative_expression '/' exponential_expression
1057 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
1058 | multiplicative_expression '%' exponential_expression
1059 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
1060 ;
1061
1062additive_expression:
1063 multiplicative_expression
1064 | additive_expression '+' multiplicative_expression
1065 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
1066 | additive_expression '-' multiplicative_expression
1067 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
1068 ;
1069
1070shift_expression:
1071 additive_expression
1072 | shift_expression LS additive_expression
1073 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
1074 | shift_expression RS additive_expression
1075 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
1076 ;
1077
1078relational_expression:
1079 shift_expression
1080 | relational_expression '<' shift_expression
1081 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
1082 | relational_expression '>' shift_expression
1083 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
1084 | relational_expression LE shift_expression
1085 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
1086 | relational_expression GE shift_expression
1087 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
1088 ;
1089
1090equality_expression:
1091 relational_expression
1092 | equality_expression EQ relational_expression
1093 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1094 | equality_expression NE relational_expression
1095 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1096 ;
1097
1098AND_expression:
1099 equality_expression
1100 | AND_expression '&' equality_expression
1101 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1102 ;
1103
1104exclusive_OR_expression:
1105 AND_expression
1106 | exclusive_OR_expression '^' AND_expression
1107 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1108 ;
1109
1110inclusive_OR_expression:
1111 exclusive_OR_expression
1112 | inclusive_OR_expression '|' exclusive_OR_expression
1113 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1114 ;
1115
1116logical_AND_expression:
1117 inclusive_OR_expression
1118 | logical_AND_expression ANDAND inclusive_OR_expression
1119 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1120 ;
1121
1122logical_OR_expression:
1123 logical_AND_expression
1124 | logical_OR_expression OROR logical_AND_expression
1125 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1126 ;
1127
1128conditional_expression:
1129 logical_OR_expression
1130 | logical_OR_expression '?' comma_expression ':' conditional_expression
1131 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1132 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1133 { $$ = new ExpressionNode( build_cond( yylloc, $1, nullptr, $4 ) ); }
1134 ;
1135
1136constant_expression:
1137 conditional_expression
1138 ;
1139
1140assignment_expression:
1141 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1142 conditional_expression
1143 | unary_expression assignment_operator assignment_expression
1144 {
1145// if ( $2 == OperKinds::AtAssn ) {
1146// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1147// } else {
1148 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1149// } // if
1150 }
1151 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1152 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1153 ;
1154
1155assignment_expression_opt:
1156 // empty
1157 { $$ = nullptr; }
1158 | assignment_expression
1159 ;
1160
1161assignment_operator:
1162 simple_assignment_operator
1163 | compound_assignment_operator
1164 ;
1165
1166simple_assignment_operator:
1167 '=' { $$ = OperKinds::Assign; }
1168 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1169 ;
1170
1171compound_assignment_operator:
1172 EXPassign { $$ = OperKinds::ExpAssn; }
1173 | MULTassign { $$ = OperKinds::MulAssn; }
1174 | DIVassign { $$ = OperKinds::DivAssn; }
1175 | MODassign { $$ = OperKinds::ModAssn; }
1176 | PLUSassign { $$ = OperKinds::PlusAssn; }
1177 | MINUSassign { $$ = OperKinds::MinusAssn; }
1178 | LSassign { $$ = OperKinds::LSAssn; }
1179 | RSassign { $$ = OperKinds::RSAssn; }
1180 | ANDassign { $$ = OperKinds::AndAssn; }
1181 | ERassign { $$ = OperKinds::ERAssn; }
1182 | ORassign { $$ = OperKinds::OrAssn; }
1183 ;
1184
1185tuple: // CFA, tuple
1186 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1187 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1188// '[' ']'
1189// { $$ = new ExpressionNode( build_tuple() ); }
1190// | '[' push assignment_expression pop ']'
1191// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1192 '[' ',' tuple_expression_list ']'
1193 { $$ = new ExpressionNode( build_tuple( yylloc, (new ExpressionNode( nullptr ))->set_last( $3 ) ) ); }
1194 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1195 { $$ = new ExpressionNode( build_tuple( yylloc, $3->set_last( $6 ) ) ); }
1196 ;
1197
1198tuple_expression_list:
1199 assignment_expression
1200 | '@' // CFA
1201 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1202 | tuple_expression_list ',' assignment_expression
1203 { $$ = $1->set_last( $3 ); }
1204 | tuple_expression_list ',' '@'
1205 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1206 ;
1207
1208comma_expression:
1209 assignment_expression
1210 | comma_expression ',' assignment_expression
1211 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1212 ;
1213
1214comma_expression_opt:
1215 // empty
1216 { $$ = nullptr; }
1217 | comma_expression
1218 ;
1219
1220// ************************** STATEMENTS *******************************
1221
1222statement:
1223 labeled_statement
1224 | compound_statement
1225 | expression_statement
1226 | selection_statement
1227 | iteration_statement
1228 | jump_statement
1229 | with_statement
1230 | mutex_statement
1231 | waitfor_statement
1232 | waituntil_statement
1233 | corun_statement
1234 | cofor_statement
1235 | exception_statement
1236 | enable_disable_statement
1237 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1238 | asm_statement
1239 | DIRECTIVE
1240 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1241 ;
1242
1243labeled_statement:
1244 // labels cannot be identifiers 0 or 1
1245 identifier_or_type_name ':' attribute_list_opt statement
1246 { $$ = $4->add_label( yylloc, $1, $3 ); }
1247 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1248 {
1249 SemanticError( yylloc, "syntx error, label \"%s\" must be associated with a statement, "
1250 "where a declaration, case, or default is not a statement.\n"
1251 "Move the label or terminate with a semicolon.", $1.str->c_str() );
1252 $$ = nullptr;
1253 }
1254 ;
1255
1256compound_statement:
1257 '{' '}'
1258 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1259 | '{' push
1260 local_label_declaration_opt // GCC, local labels appear at start of block
1261 statement_decl_list // C99, intermix declarations and statements
1262 pop '}'
1263 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1264 ;
1265
1266statement_decl_list: // C99
1267 statement_decl
1268 | statement_decl_list statement_decl
1269 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1270 ;
1271
1272statement_decl:
1273 declaration // CFA, new & old style declarations
1274 { $$ = new StatementNode( $1 ); }
1275 | EXTENSION declaration // GCC
1276 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1277 | function_definition
1278 { $$ = new StatementNode( $1 ); }
1279 | EXTENSION function_definition // GCC
1280 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1281 | statement
1282 ;
1283
1284statement_list_nodecl:
1285 statement
1286 | statement_list_nodecl statement
1287 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1288 | statement_list_nodecl error // invalid syntax rule
1289 { SemanticError( yylloc, "syntax error, declarations only allowed at the start of the switch body,"
1290 " i.e., after the '{'." ); $$ = nullptr; }
1291 ;
1292
1293expression_statement:
1294 comma_expression_opt ';'
1295 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1296 ;
1297
1298// "if", "switch", and "choose" require parenthesis around the conditional. See the following ambiguities without
1299// parenthesis:
1300//
1301// if x + y + z; => if ( x ) + y + z or if ( x + y ) + z
1302//
1303// switch O { }
1304//
1305// O{} => object-constructor for conditional, switch body ???
1306// O{} => O for conditional followed by switch body
1307//
1308// C++ has this problem, as it has the same constructor syntax.
1309//
1310// switch sizeof ( T ) { }
1311//
1312// sizeof ( T ) => sizeof of T for conditional followed by switch body
1313// sizeof ( T ) => sizeof of compound literal (T){ }, closing parenthesis ???
1314//
1315// Note the two grammar rules for sizeof (alignof)
1316//
1317// | SIZEOF unary_expression
1318// | SIZEOF '(' type_no_function ')'
1319//
1320// where the first DOES NOT require parenthesis! And C++ inherits this problem from C.
1321
1322selection_statement:
1323 IF '(' conditional_declaration ')' statement %prec THEN
1324 // explicitly deal with the shift/reduce conflict on if/else
1325 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1326 | IF '(' conditional_declaration ')' statement ELSE statement
1327 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1328 | SWITCH '(' comma_expression ')' case_clause
1329 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1330 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1331 {
1332 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1333 // The semantics of the declaration list is changed to include associated initialization, which is performed
1334 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1335 // statement around the switch. Statements after the initial declaration list can never be executed, and
1336 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1337 // statement.
1338 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1339 }
1340 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1341 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1342 | CHOOSE '(' comma_expression ')' case_clause // CFA
1343 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1344 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1345 {
1346 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1347 $$ = $7 ? new StatementNode( build_compound( yylloc, (new StatementNode( $7 ))->set_last( sw ) ) ) : sw;
1348 }
1349 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1350 { SemanticError( yylloc, "syntax error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1351 ;
1352
1353conditional_declaration:
1354 comma_expression
1355 { $$ = new CondCtl( nullptr, $1 ); }
1356 | c_declaration // no semi-colon
1357 { $$ = new CondCtl( $1, nullptr ); }
1358 | cfa_declaration // no semi-colon
1359 { $$ = new CondCtl( $1, nullptr ); }
1360 | declaration comma_expression // semi-colon separated
1361 { $$ = new CondCtl( $1, $2 ); }
1362 ;
1363
1364// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1365// clause allows a list of values and subranges.
1366
1367case_value: // CFA
1368 constant_expression { $$ = $1; }
1369 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1370 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1371 | subrange // CFA, subrange
1372 ;
1373
1374case_value_list: // CFA
1375 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1376 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1377 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1378 ;
1379
1380case_label: // CFA
1381 CASE error // invalid syntax rule
1382 { SemanticError( yylloc, "syntax error, case list missing after case." ); $$ = nullptr; }
1383 | CASE case_value_list ':' { $$ = $2; }
1384 | CASE case_value_list error // invalid syntax rule
1385 { SemanticError( yylloc, "syntax error, colon missing after case list." ); $$ = nullptr; }
1386 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1387 // A semantic check is required to ensure only one default clause per switch/choose statement.
1388 | DEFAULT error // invalid syntax rule
1389 { SemanticError( yylloc, "syntax error, colon missing after default." ); $$ = nullptr; }
1390 ;
1391
1392case_label_list: // CFA
1393 case_label
1394 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1395 ;
1396
1397case_clause: // CFA
1398 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1399 ;
1400
1401switch_clause_list_opt: // CFA
1402 // empty
1403 { $$ = nullptr; }
1404 | switch_clause_list
1405 ;
1406
1407switch_clause_list: // CFA
1408 case_label_list statement_list_nodecl
1409 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1410 | switch_clause_list case_label_list statement_list_nodecl
1411 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1412 ;
1413
1414iteration_statement:
1415 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1416 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1417 | WHILE '(' ')' statement ELSE statement // CFA
1418 {
1419 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1420 SemanticWarning( yylloc, Warning::SuperfluousElse );
1421 }
1422 | WHILE '(' conditional_declaration ')' statement %prec THEN
1423 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1424 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1425 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1426 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1427 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1428 | DO statement WHILE '(' ')' ELSE statement // CFA
1429 {
1430 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1431 SemanticWarning( yylloc, Warning::SuperfluousElse );
1432 }
1433 | DO statement WHILE '(' comma_expression ')' ';'
1434 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1435 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1436 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1437 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1438 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1439 | FOR '(' ')' statement ELSE statement // CFA
1440 {
1441 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1442 SemanticWarning( yylloc, Warning::SuperfluousElse );
1443 }
1444 | FOR '(' for_control_expression_list ')' statement %prec THEN
1445 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1446 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1447 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1448 ;
1449
1450for_control_expression_list:
1451 for_control_expression
1452 | for_control_expression_list ':' for_control_expression
1453 // ForCtrl + ForCtrl:
1454 // init + init => multiple declaration statements that are hoisted
1455 // condition + condition => (expression) && (expression)
1456 // change + change => (expression), (expression)
1457 {
1458 $1->init->set_last( $3->init );
1459 if ( $1->condition ) {
1460 if ( $3->condition ) {
1461 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1462 } // if
1463 } else $1->condition = $3->condition;
1464 if ( $1->change ) {
1465 if ( $3->change ) {
1466 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1467 } // if
1468 } else $1->change = $3->change;
1469 $$ = $1;
1470 }
1471 ;
1472
1473for_control_expression:
1474 ';' comma_expression_opt ';' comma_expression_opt
1475 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1476 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1477 {
1478 StatementNode * init = $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr;
1479 $$ = new ForCtrl( init, $3, $5 );
1480 }
1481 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1482 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1483
1484 | '@' ';' comma_expression // CFA, empty loop-index
1485 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1486 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1487 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1488
1489 | comma_expression // CFA, anonymous loop-index
1490 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1491 | downupdowneq comma_expression // CFA, anonymous loop-index
1492 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1493
1494 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1495 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1496 | '@' updowneq comma_expression // CFA, anonymous loop-index
1497 {
1498 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1499 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1500 }
1501 | comma_expression updowneq '@' // CFA, anonymous loop-index
1502 {
1503 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1504 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1505 }
1506 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1507 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1508 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1509 {
1510 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1511 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1512 }
1513 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1514 {
1515 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1516 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1517 }
1518 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1519 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1520 | '@' updowneq '@' // CFA, invalid syntax rule
1521 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1522 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1523 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1524 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1525 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1526 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1527 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1528
1529 | comma_expression ';' comma_expression // CFA
1530 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1531 | comma_expression ';' downupdowneq comma_expression // CFA
1532 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1533
1534 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1535 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1536 | comma_expression ';' '@' updowneq comma_expression // CFA
1537 {
1538 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1539 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1540 }
1541 | comma_expression ';' comma_expression updowneq '@' // CFA
1542 {
1543 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1544 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1545 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1546 }
1547 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1548 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1549
1550 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1551 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1552 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1553 {
1554 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1555 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1556 }
1557 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1558 {
1559 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1560 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1561 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1562 }
1563 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1564 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1565 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1566 {
1567 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1568 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1569 }
1570 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1571 {
1572 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1573 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1574 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1575 }
1576 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1577 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1578
1579 | declaration comma_expression // CFA
1580 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1581 | declaration downupdowneq comma_expression // CFA
1582 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1583
1584 | declaration comma_expression updowneq comma_expression // CFA
1585 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1586 | declaration '@' updowneq comma_expression // CFA
1587 {
1588 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1589 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1590 }
1591 | declaration comma_expression updowneq '@' // CFA
1592 {
1593 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1594 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1595 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1596 }
1597
1598 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1599 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1600 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1601 {
1602 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1603 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1604 }
1605 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1606 {
1607 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1608 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1609 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1610 }
1611 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1612 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1613 | declaration '@' updowneq comma_expression '~' '@' // CFA
1614 {
1615 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1616 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, nullptr );
1617 }
1618 | declaration comma_expression updowneq '@' '~' '@' // CFA
1619 {
1620 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1621 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1622 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1623 }
1624 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1625 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1626
1627 | comma_expression ';' enum_key // CFA, enum type
1628 {
1629 $$ = enumRangeCtrl( $1, new ExpressionNode( new ast::TypeExpr( yylloc, $3->buildType() ) ) );
1630 }
1631 | comma_expression ';' downupdowneq enum_key // CFA, enum type, reverse direction
1632 {
1633 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) {
1634 SemanticError( yylloc, "syntax error, all enumeration ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr;
1635 }
1636 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1637 }
1638 ;
1639
1640enum_key:
1641 type_name
1642 { $$ = DeclarationNode::newEnum( $1->symbolic.name, nullptr, false, false ); }
1643 | ENUM identifier
1644 { $$ = DeclarationNode::newEnum( $2, nullptr, false, false ); }
1645 | ENUM type_name
1646 { $$ = DeclarationNode::newEnum( $2->symbolic.name, nullptr, false, false ); }
1647 ;
1648
1649downupdowneq:
1650 ErangeDown
1651 { $$ = OperKinds::GThan; }
1652 | ErangeUpEq
1653 { $$ = OperKinds::LEThan; }
1654 | ErangeDownEq
1655 { $$ = OperKinds::GEThan; }
1656 ;
1657
1658updown:
1659 '~'
1660 { $$ = OperKinds::LThan; }
1661 | ErangeDown
1662 { $$ = OperKinds::GThan; }
1663 ;
1664
1665updowneq:
1666 updown
1667 | ErangeUpEq
1668 { $$ = OperKinds::LEThan; }
1669 | ErangeDownEq
1670 { $$ = OperKinds::GEThan; }
1671 ;
1672
1673jump_statement:
1674 GOTO identifier_or_type_name ';'
1675 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1676 | GOTO '*' comma_expression ';' // GCC, computed goto
1677 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1678 // whereas normal operator precedence yields goto (*i)+3;
1679 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1680 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1681 | fall_through_name ';' // CFA
1682 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1683 | fall_through_name identifier_or_type_name ';' // CFA
1684 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1685 | fall_through_name DEFAULT ';' // CFA
1686 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1687 | CONTINUE ';'
1688 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1689 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1690 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1691 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1692 // the target of the transfer appears only at the start of an iteration statement.
1693 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1694 | BREAK ';'
1695 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1696 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1697 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1698 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1699 // the target of the transfer appears only at the start of an iteration statement.
1700 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1701 | RETURN comma_expression_opt ';'
1702 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1703 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1704 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1705 | SUSPEND ';'
1706 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1707 | SUSPEND compound_statement
1708 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1709 | SUSPEND COROUTINE ';'
1710 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1711 | SUSPEND COROUTINE compound_statement
1712 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1713 | SUSPEND GENERATOR ';'
1714 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1715 | SUSPEND GENERATOR compound_statement
1716 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1717 | THROW assignment_expression_opt ';' // handles rethrow
1718 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1719 | THROWRESUME assignment_expression_opt ';' // handles reresume
1720 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1721 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1722 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1723 ;
1724
1725fall_through_name: // CFA
1726 FALLTHRU
1727 | FALLTHROUGH
1728 ;
1729
1730with_statement:
1731 WITH '(' type_list ')' statement // support scoped enumeration
1732 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1733 ;
1734
1735// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1736mutex_statement:
1737 MUTEX '(' argument_expression_list_opt ')' statement
1738 {
1739 if ( ! $3 ) { SemanticError( yylloc, "syntax error, mutex argument list cannot be empty." ); $$ = nullptr; }
1740 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1741 }
1742 ;
1743
1744when_clause:
1745 WHEN '(' comma_expression ')' { $$ = $3; }
1746 ;
1747
1748when_clause_opt:
1749 // empty
1750 { $$ = nullptr; }
1751 | when_clause
1752 ;
1753
1754cast_expression_list:
1755 cast_expression
1756 | cast_expression_list ',' cast_expression
1757 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1758 ;
1759
1760timeout:
1761 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1762 ;
1763
1764wor:
1765 OROR
1766 | WOR
1767
1768waitfor:
1769 WAITFOR '(' cast_expression ')'
1770 { $$ = $3; }
1771 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1772 { $$ = $3->set_last( $5 ); }
1773 ;
1774
1775wor_waitfor_clause:
1776 when_clause_opt waitfor statement %prec THEN
1777 // Called first: create header for WaitForStmt.
1778 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1779 | wor_waitfor_clause wor when_clause_opt waitfor statement
1780 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1781 | wor_waitfor_clause wor when_clause_opt ELSE statement
1782 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1783 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1784 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1785 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1786 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1787 { SemanticError( yylloc, "syntax error, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1788 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1789 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1790 ;
1791
1792waitfor_statement:
1793 wor_waitfor_clause %prec THEN
1794 { $$ = new StatementNode( $1 ); }
1795 ;
1796
1797wand:
1798 ANDAND
1799 | WAND
1800 ;
1801
1802waituntil:
1803 WAITUNTIL '(' comma_expression ')'
1804 { $$ = $3; }
1805 ;
1806
1807waituntil_clause:
1808 when_clause_opt waituntil statement
1809 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1810 | '(' wor_waituntil_clause ')'
1811 { $$ = $2; }
1812 ;
1813
1814wand_waituntil_clause:
1815 waituntil_clause %prec THEN
1816 { $$ = $1; }
1817 | waituntil_clause wand wand_waituntil_clause
1818 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1819 ;
1820
1821wor_waituntil_clause:
1822 wand_waituntil_clause
1823 { $$ = $1; }
1824 | wor_waituntil_clause wor wand_waituntil_clause
1825 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1826 | wor_waituntil_clause wor when_clause_opt ELSE statement
1827 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1828 ;
1829
1830waituntil_statement:
1831 wor_waituntil_clause %prec THEN
1832 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1833 ;
1834
1835corun_statement:
1836 CORUN statement
1837 { $$ = new StatementNode( build_corun( yylloc, $2 ) ); }
1838 ;
1839
1840cofor_statement:
1841 COFOR '(' for_control_expression_list ')' statement
1842 { $$ = new StatementNode( build_cofor( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1843 ;
1844
1845exception_statement:
1846 TRY compound_statement handler_clause %prec THEN
1847 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1848 | TRY compound_statement finally_clause
1849 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1850 | TRY compound_statement handler_clause finally_clause
1851 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1852 ;
1853
1854handler_clause:
1855 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1856 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1857 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1858 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1859 ;
1860
1861handler_predicate_opt:
1862 // empty
1863 { $$ = nullptr; }
1864 | ';' conditional_expression { $$ = $2; }
1865 ;
1866
1867handler_key:
1868 CATCH { $$ = ast::Terminate; }
1869 | RECOVER { $$ = ast::Terminate; }
1870 | CATCHRESUME { $$ = ast::Resume; }
1871 | FIXUP { $$ = ast::Resume; }
1872 ;
1873
1874finally_clause:
1875 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1876 ;
1877
1878exception_declaration:
1879 // No SUE declaration in parameter list.
1880 type_specifier_nobody
1881 | type_specifier_nobody declarator
1882 { $$ = $2->addType( $1 ); }
1883 | type_specifier_nobody variable_abstract_declarator
1884 { $$ = $2->addType( $1 ); }
1885 | cfa_abstract_declarator_tuple identifier // CFA
1886 { $$ = $1->addName( $2 ); }
1887 | cfa_abstract_declarator_tuple // CFA
1888 ;
1889
1890enable_disable_statement:
1891 enable_disable_key identifier_list compound_statement
1892 ;
1893
1894enable_disable_key:
1895 ENABLE
1896 | DISABLE
1897 ;
1898
1899asm_statement:
1900 ASM asm_volatile_opt '(' string_literal ')' ';'
1901 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1902 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1903 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1904 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1905 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1906 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1907 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1908 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1909 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1910 ;
1911
1912asm_volatile_opt: // GCC
1913 // empty
1914 { $$ = false; }
1915 | VOLATILE
1916 { $$ = true; }
1917 ;
1918
1919asm_operands_opt: // GCC
1920 // empty
1921 { $$ = nullptr; } // use default argument
1922 | asm_operands_list
1923 ;
1924
1925asm_operands_list: // GCC
1926 asm_operand
1927 | asm_operands_list ',' asm_operand
1928 { $$ = $1->set_last( $3 ); }
1929 ;
1930
1931asm_operand: // GCC
1932 string_literal '(' constant_expression ')'
1933 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1934 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1935 {
1936 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1937 delete $2.str;
1938 }
1939 ;
1940
1941asm_clobbers_list_opt: // GCC
1942 // empty
1943 { $$ = nullptr; } // use default argument
1944 | string_literal
1945 { $$ = $1; }
1946 | asm_clobbers_list_opt ',' string_literal
1947 { $$ = $1->set_last( $3 ); }
1948 ;
1949
1950label_list:
1951 identifier
1952 {
1953 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1954 delete $1; // allocated by lexer
1955 }
1956 | label_list ',' identifier
1957 {
1958 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1959 delete $3; // allocated by lexer
1960 }
1961 ;
1962
1963// ****************************** DECLARATIONS *********************************
1964
1965declaration_list_opt: // used at beginning of switch statement
1966 // empty
1967 { $$ = nullptr; }
1968 | declaration_list
1969 ;
1970
1971declaration_list:
1972 declaration
1973 | declaration_list declaration
1974 { $$ = $1->set_last( $2 ); }
1975 ;
1976
1977KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1978 // empty
1979 { $$ = nullptr; }
1980 | KR_parameter_list
1981 ;
1982
1983KR_parameter_list:
1984 c_declaration ';'
1985 { $$ = $1; }
1986 | KR_parameter_list c_declaration ';'
1987 { $$ = $1->set_last( $2 ); }
1988 ;
1989
1990local_label_declaration_opt: // GCC, local label
1991 // empty
1992 | local_label_declaration_list
1993 ;
1994
1995local_label_declaration_list: // GCC, local label
1996 LABEL local_label_list ';'
1997 | local_label_declaration_list LABEL local_label_list ';'
1998 ;
1999
2000local_label_list: // GCC, local label
2001 identifier_or_type_name
2002 | local_label_list ',' identifier_or_type_name
2003 ;
2004
2005declaration: // old & new style declarations
2006 c_declaration ';'
2007 | cfa_declaration ';' // CFA
2008 | static_assert // C11
2009 ;
2010
2011static_assert:
2012 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
2013 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
2014 | STATICASSERT '(' constant_expression ')' ';' // CFA
2015 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
2016
2017// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
2018// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
2019// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
2020// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
2021// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
2022// block, but cannot be mixed within a specific declaration.
2023//
2024// CFA C
2025// [10] int x; int x[10]; // array of 10 integers
2026// [10] * char y; char *y[10]; // array of 10 pointers to char
2027
2028cfa_declaration: // CFA
2029 cfa_variable_declaration
2030 | cfa_typedef_declaration
2031 | cfa_function_declaration
2032 | type_declaring_list
2033 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
2034 | trait_specifier
2035 ;
2036
2037cfa_variable_declaration: // CFA
2038 cfa_variable_specifier initializer_opt
2039 { $$ = $1->addInitializer( $2 ); }
2040 | declaration_qualifier_list cfa_variable_specifier initializer_opt
2041 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
2042 // them as a type_qualifier cannot appear in that context.
2043 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
2044 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
2045 { $$ = $1->set_last( $1->cloneType( $5 )->addInitializer( $6 ) ); }
2046 ;
2047
2048cfa_variable_specifier: // CFA
2049 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2050 // storage-class
2051 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
2052 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2053 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
2054 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
2055 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
2056 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
2057
2058 // [ int s, int t ]; // declare s and t
2059 // [ int, int ] f();
2060 // [] g( int );
2061 // [ int x, int y ] = f(); // declare x and y, initialize each from f
2062 // g( x + y );
2063 | cfa_function_return asm_name_opt
2064 { SemanticError( yylloc, "tuple-element declarations is currently unimplemented." ); $$ = nullptr; }
2065 | type_qualifier_list cfa_function_return asm_name_opt
2066 { SemanticError( yylloc, "tuple variable declaration is currently unimplemented." ); $$ = nullptr; }
2067 ;
2068
2069cfa_function_declaration: // CFA
2070 cfa_function_specifier
2071 | type_qualifier_list cfa_function_specifier
2072 { $$ = $2->addQualifiers( $1 ); }
2073 | declaration_qualifier_list cfa_function_specifier
2074 { $$ = $2->addQualifiers( $1 ); }
2075 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
2076 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
2077 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')'
2078 {
2079 // Append the return type at the start (left-hand-side) to each identifier in the list.
2080 DeclarationNode * ret = new DeclarationNode;
2081 ret->type = maybeCopy( $1->type->base );
2082 $$ = $1->set_last( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
2083 }
2084 ;
2085
2086cfa_function_specifier: // CFA
2087 '[' ']' identifier '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2088 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2089 | '[' ']' TYPEDEFname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2090 { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2091 // | '[' ']' TYPEGENname '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2092 // { $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( nullptr ), $6, nullptr )->addQualifiers( $9 ); }
2093
2094 // identifier_or_type_name must be broken apart because of the sequence:
2095 //
2096 // '[' ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
2097 // '[' ']' type_specifier
2098 //
2099 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
2100 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
2101 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2102 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
2103 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2104 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_list_ellipsis_opt pop ')' attribute_list_opt
2105 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
2106 ;
2107
2108cfa_function_return: // CFA
2109 '[' push cfa_parameter_list pop ']'
2110 { $$ = DeclarationNode::newTuple( $3 ); }
2111 | '[' push cfa_parameter_list ',' cfa_abstract_parameter_list pop ']'
2112 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
2113 { $$ = DeclarationNode::newTuple( $3->set_last( $5 ) ); }
2114 ;
2115
2116cfa_typedef_declaration: // CFA
2117 TYPEDEF cfa_variable_specifier
2118 {
2119 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
2120 $$ = $2->addTypedef();
2121 }
2122 | TYPEDEF cfa_function_specifier
2123 {
2124 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2125 $$ = $2->addTypedef();
2126 }
2127 | cfa_typedef_declaration ',' identifier
2128 {
2129 typedefTable.addToEnclosingScope( *$3, TYPEDEFname, "cfa_typedef_declaration 3" );
2130 $$ = $1->set_last( $1->cloneType( $3 ) );
2131 }
2132 ;
2133
2134// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2135// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2136
2137typedef_declaration:
2138 TYPEDEF type_specifier declarator
2139 {
2140 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2141 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2142 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2143 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2144 }
2145 | typedef_declaration ',' declarator
2146 {
2147 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2148 $$ = $1->set_last( $1->cloneBaseType( $3 )->addTypedef() );
2149 }
2150 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2151 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2152 | type_specifier TYPEDEF declarator
2153 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2154 | type_specifier TYPEDEF type_qualifier_list declarator
2155 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2156 ;
2157
2158typedef_expression:
2159 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2160 TYPEDEF identifier '=' assignment_expression
2161 {
2162 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2163 }
2164 | typedef_expression ',' identifier '=' assignment_expression
2165 {
2166 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2167 }
2168 ;
2169
2170c_declaration:
2171 declaration_specifier declaring_list
2172 { $$ = distAttr( $1, $2 ); }
2173 | typedef_declaration
2174 | typedef_expression // deprecated GCC, naming expression type
2175 | sue_declaration_specifier
2176 {
2177 assert( $1->type );
2178 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2179 SemanticError( yylloc, "syntax error, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2180 }
2181 // enums are never empty declarations because there must have at least one enumeration.
2182 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2183 SemanticError( yylloc, "syntax error, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2184 }
2185 }
2186 ;
2187
2188declaring_list:
2189 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2190 // storage-class
2191 variable_declarator asm_name_opt initializer_opt
2192 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2193 | variable_type_redeclarator asm_name_opt initializer_opt
2194 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2195
2196 | general_function_declarator asm_name_opt
2197 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2198 | general_function_declarator asm_name_opt '=' VOID
2199 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2200
2201 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2202 { $$ = $1->set_last( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2203 ;
2204
2205general_function_declarator:
2206 function_type_redeclarator
2207 | function_declarator
2208 ;
2209
2210declaration_specifier: // type specifier + storage class
2211 basic_declaration_specifier
2212 | type_declaration_specifier
2213 | sue_declaration_specifier
2214 | sue_declaration_specifier invalid_types // invalid syntax rule
2215 {
2216 SemanticError( yylloc, "syntax error, expecting ';' at end of \"%s\" declaration.",
2217 ast::AggregateDecl::aggrString( $1->type->aggregate.kind ) );
2218 $$ = nullptr;
2219 }
2220 ;
2221
2222invalid_types:
2223 aggregate_key
2224 | basic_type_name
2225 | indirect_type
2226 ;
2227
2228declaration_specifier_nobody: // type specifier + storage class - {...}
2229 // Preclude SUE declarations in restricted scopes:
2230 //
2231 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2232 //
2233 // because it is impossible to call f due to name equivalence.
2234 basic_declaration_specifier
2235 | sue_declaration_specifier_nobody
2236 | type_declaration_specifier
2237 ;
2238
2239type_specifier: // type specifier
2240 basic_type_specifier
2241 | sue_type_specifier
2242 | type_type_specifier
2243 ;
2244
2245type_specifier_nobody: // type specifier - {...}
2246 // Preclude SUE declarations in restricted scopes:
2247 //
2248 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2249 //
2250 // because it is impossible to call f due to name equivalence.
2251 basic_type_specifier
2252 | sue_type_specifier_nobody
2253 | type_type_specifier
2254 ;
2255
2256type_qualifier_list_opt: // GCC, used in asm_statement
2257 // empty
2258 { $$ = nullptr; }
2259 | type_qualifier_list
2260 ;
2261
2262type_qualifier_list:
2263 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2264 //
2265 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2266 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2267 // appeared only once.
2268 type_qualifier
2269 | type_qualifier_list type_qualifier
2270 { $$ = $1->addQualifiers( $2 ); }
2271 ;
2272
2273type_qualifier:
2274 type_qualifier_name
2275 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2276 | attribute // trick handles most attribute locations
2277 ;
2278
2279type_qualifier_name:
2280 CONST
2281 { $$ = build_type_qualifier( ast::CV::Const ); }
2282 | RESTRICT
2283 { $$ = build_type_qualifier( ast::CV::Restrict ); }
2284 | VOLATILE
2285 { $$ = build_type_qualifier( ast::CV::Volatile ); }
2286 | ATOMIC
2287 { $$ = build_type_qualifier( ast::CV::Atomic ); }
2288
2289 // forall is a CV qualifier because it can appear in places where SC qualifiers are disallowed.
2290 //
2291 // void foo( forall( T ) T (*)( T ) ); // forward declaration
2292 // void bar( static int ); // static disallowed (gcc/CFA)
2293 | forall
2294 { $$ = build_forall( $1 ); }
2295 ;
2296
2297forall:
2298 FORALL '(' type_parameter_list ')' // CFA
2299 { $$ = $3; }
2300 ;
2301
2302declaration_qualifier_list:
2303 storage_class_list
2304 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2305 { $$ = $1->addQualifiers( $2 ); }
2306 | declaration_qualifier_list type_qualifier_list storage_class_list
2307 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2308 ;
2309
2310storage_class_list:
2311 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2312 // only one of each is specified, except for inline, which can appear with the others.
2313 //
2314 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2315 // specifiers in a declaration.
2316 storage_class
2317 | storage_class_list storage_class
2318 { $$ = $1->addQualifiers( $2 ); }
2319 ;
2320
2321storage_class:
2322 EXTERN
2323 { $$ = DeclarationNode::newStorageClass( ast::Storage::Extern ); }
2324 | STATIC
2325 { $$ = DeclarationNode::newStorageClass( ast::Storage::Static ); }
2326 | AUTO
2327 { $$ = DeclarationNode::newStorageClass( ast::Storage::Auto ); }
2328 | REGISTER
2329 { $$ = DeclarationNode::newStorageClass( ast::Storage::Register ); }
2330 | THREADLOCALGCC // GCC
2331 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalGcc ); }
2332 | THREADLOCALC11 // C11
2333 { $$ = DeclarationNode::newStorageClass( ast::Storage::ThreadLocalC11 ); }
2334 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2335 | INLINE // C99
2336 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Inline ); }
2337 | FORTRAN // C99
2338 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Fortran ); }
2339 | NORETURN // C11
2340 { $$ = DeclarationNode::newFuncSpecifier( ast::Function::Noreturn ); }
2341 ;
2342
2343basic_type_name:
2344 basic_type_name_type
2345 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2346 ;
2347
2348// Just an intermediate value for conversion.
2349basic_type_name_type:
2350 VOID
2351 { $$ = build_basic_type( TypeData::Void ); }
2352 | BOOL // C99
2353 { $$ = build_basic_type( TypeData::Bool ); }
2354 | CHAR
2355 { $$ = build_basic_type( TypeData::Char ); }
2356 | INT
2357 { $$ = build_basic_type( TypeData::Int ); }
2358 | INT128
2359 { $$ = build_basic_type( TypeData::Int128 ); }
2360 | UINT128
2361 { $$ = addType( build_basic_type( TypeData::Int128 ), build_signedness( TypeData::Unsigned ) ); }
2362 | FLOAT
2363 { $$ = build_basic_type( TypeData::Float ); }
2364 | DOUBLE
2365 { $$ = build_basic_type( TypeData::Double ); }
2366 | uuFLOAT80
2367 { $$ = build_basic_type( TypeData::uuFloat80 ); }
2368 | uuFLOAT128
2369 { $$ = build_basic_type( TypeData::uuFloat128 ); }
2370 | uFLOAT16
2371 { $$ = build_basic_type( TypeData::uFloat16 ); }
2372 | uFLOAT32
2373 { $$ = build_basic_type( TypeData::uFloat32 ); }
2374 | uFLOAT32X
2375 { $$ = build_basic_type( TypeData::uFloat32x ); }
2376 | uFLOAT64
2377 { $$ = build_basic_type( TypeData::uFloat64 ); }
2378 | uFLOAT64X
2379 { $$ = build_basic_type( TypeData::uFloat64x ); }
2380 | uFLOAT128
2381 { $$ = build_basic_type( TypeData::uFloat128 ); }
2382 | DECIMAL32
2383 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2384 | DECIMAL64
2385 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2386 | DECIMAL128
2387 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2388 | COMPLEX // C99
2389 { $$ = build_complex_type( TypeData::Complex ); }
2390 | IMAGINARY // C99
2391 { $$ = build_complex_type( TypeData::Imaginary ); }
2392 | SIGNED
2393 { $$ = build_signedness( TypeData::Signed ); }
2394 | UNSIGNED
2395 { $$ = build_signedness( TypeData::Unsigned ); }
2396 | SHORT
2397 { $$ = build_length( TypeData::Short ); }
2398 | LONG
2399 { $$ = build_length( TypeData::Long ); }
2400 | VA_LIST // GCC, __builtin_va_list
2401 { $$ = build_builtin_type( TypeData::Valist ); }
2402 | AUTO_TYPE
2403 { $$ = build_builtin_type( TypeData::AutoType ); }
2404 | vtable
2405 ;
2406
2407vtable_opt:
2408 // empty
2409 { $$ = nullptr; }
2410 | vtable
2411 ;
2412
2413vtable:
2414 VTABLE '(' type_name ')' default_opt
2415 { $$ = build_vtable_type( $3 ); }
2416 ;
2417
2418default_opt:
2419 // empty
2420 { $$ = nullptr; }
2421 | DEFAULT
2422 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2423 ;
2424
2425basic_declaration_specifier:
2426 // A semantic check is necessary for conflicting storage classes.
2427 basic_type_specifier
2428 | declaration_qualifier_list basic_type_specifier
2429 { $$ = $2->addQualifiers( $1 ); }
2430 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2431 { $$ = $1->addQualifiers( $2 ); }
2432 | basic_declaration_specifier storage_class type_qualifier_list
2433 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2434 | basic_declaration_specifier storage_class basic_type_specifier
2435 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2436 ;
2437
2438basic_type_specifier:
2439 direct_type
2440 // Cannot have type modifiers, e.g., short, long, etc.
2441 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2442 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2443 ;
2444
2445direct_type:
2446 basic_type_name
2447 | type_qualifier_list basic_type_name
2448 { $$ = $2->addQualifiers( $1 ); }
2449 | direct_type type_qualifier
2450 { $$ = $1->addQualifiers( $2 ); }
2451 | direct_type basic_type_name
2452 { $$ = $1->addType( $2 ); }
2453 ;
2454
2455indirect_type:
2456 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2457 { $$ = $3; }
2458 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2459 { $$ = DeclarationNode::newTypeof( $3 ); }
2460 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2461 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2462 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2463 { $$ = DeclarationNode::newTypeof( $3, true ); }
2464 | ZERO_T // CFA
2465 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::Zero ) ); }
2466 | ONE_T // CFA
2467 { $$ = DeclarationNode::newFromTypeData( build_builtin_type( TypeData::One ) ); }
2468 ;
2469
2470sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2471 sue_type_specifier
2472 | declaration_qualifier_list sue_type_specifier
2473 { $$ = $2->addQualifiers( $1 ); }
2474 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2475 { $$ = $1->addQualifiers( $2 ); }
2476 | sue_declaration_specifier storage_class type_qualifier_list
2477 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2478 ;
2479
2480sue_type_specifier: // struct, union, enum + type specifier
2481 elaborated_type
2482 | type_qualifier_list
2483 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2484 elaborated_type
2485 { $$ = $3->addQualifiers( $1 ); }
2486 | sue_type_specifier type_qualifier
2487 {
2488 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2489 $$ = $1->addQualifiers( $2 );
2490 }
2491 ;
2492
2493sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2494 sue_type_specifier_nobody
2495 | declaration_qualifier_list sue_type_specifier_nobody
2496 { $$ = $2->addQualifiers( $1 ); }
2497 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2498 { $$ = $1->addQualifiers( $2 ); }
2499 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2500 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2501 ;
2502
2503sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2504 elaborated_type_nobody
2505 | type_qualifier_list elaborated_type_nobody
2506 { $$ = $2->addQualifiers( $1 ); }
2507 | sue_type_specifier_nobody type_qualifier
2508 { $$ = $1->addQualifiers( $2 ); }
2509 ;
2510
2511type_declaration_specifier:
2512 type_type_specifier
2513 | declaration_qualifier_list type_type_specifier
2514 { $$ = $2->addQualifiers( $1 ); }
2515 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2516 { $$ = $1->addQualifiers( $2 ); }
2517 | type_declaration_specifier storage_class type_qualifier_list
2518 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2519 ;
2520
2521type_type_specifier: // typedef types
2522 type_name
2523 { $$ = DeclarationNode::newFromTypeData( $1 ); }
2524 | type_qualifier_list type_name
2525 { $$ = DeclarationNode::newFromTypeData( $2 )->addQualifiers( $1 ); }
2526 | type_type_specifier type_qualifier
2527 { $$ = $1->addQualifiers( $2 ); }
2528 ;
2529
2530type_name:
2531 TYPEDEFname
2532 { $$ = build_typedef( $1 ); }
2533 | '.' TYPEDEFname
2534 { $$ = build_qualified_type( build_global_scope(), build_typedef( $2 ) ); }
2535 | type_name '.' TYPEDEFname
2536 { $$ = build_qualified_type( $1, build_typedef( $3 ) ); }
2537 | typegen_name
2538 | '.' typegen_name
2539 { $$ = build_qualified_type( build_global_scope(), $2 ); }
2540 | type_name '.' typegen_name
2541 { $$ = build_qualified_type( $1, $3 ); }
2542 ;
2543
2544typegen_name: // CFA
2545 TYPEGENname
2546 { $$ = build_type_gen( $1, nullptr ); }
2547 | TYPEGENname '(' ')'
2548 { $$ = build_type_gen( $1, nullptr ); }
2549 | TYPEGENname '(' type_list ')'
2550 { $$ = build_type_gen( $1, $3 ); }
2551 ;
2552
2553elaborated_type: // struct, union, enum
2554 aggregate_type
2555 | enum_type
2556 ;
2557
2558elaborated_type_nobody: // struct, union, enum - {...}
2559 aggregate_type_nobody
2560 | enum_type_nobody
2561 ;
2562
2563// ************************** AGGREGATE *******************************
2564
2565aggregate_type: // struct, union
2566 aggregate_key attribute_list_opt
2567 { forall = false; } // reset
2568 '{' field_declaration_list_opt '}' type_parameters_opt
2569 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2570 | aggregate_key attribute_list_opt identifier
2571 {
2572 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2573 forall = false; // reset
2574 }
2575 '{' field_declaration_list_opt '}' type_parameters_opt
2576 {
2577 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2578 }
2579 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2580 {
2581 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2582 forall = false; // reset
2583 }
2584 '{' field_declaration_list_opt '}' type_parameters_opt
2585 {
2586 DeclarationNode::newFromTypeData( build_typedef( $3 ) );
2587 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2588 }
2589 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2590 {
2591 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2592 forall = false; // reset
2593 }
2594 '{' field_declaration_list_opt '}' type_parameters_opt
2595 {
2596 DeclarationNode::newFromTypeData( build_type_gen( $3, nullptr ) );
2597 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2598 }
2599 | aggregate_type_nobody
2600 ;
2601
2602type_parameters_opt:
2603 // empty
2604 { $$ = nullptr; } %prec '}'
2605 | '(' type_list ')'
2606 { $$ = $2; }
2607 ;
2608
2609aggregate_type_nobody: // struct, union - {...}
2610 aggregate_key attribute_list_opt identifier
2611 {
2612 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2613 forall = false; // reset
2614 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2615 }
2616 | aggregate_key attribute_list_opt type_name
2617 {
2618 forall = false; // reset
2619 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2620 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2621 // delete newFromTypeGen.
2622 if ( $3->kind == TypeData::SymbolicInst && ! $3->symbolic.isTypedef ) {
2623 $$ = DeclarationNode::newFromTypeData( $3 )->addQualifiers( $2 );
2624 } else {
2625 $$ = DeclarationNode::newAggregate( $1, $3->symbolic.name, $3->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2626 $3->symbolic.name = nullptr; // copied to $$
2627 $3->symbolic.actuals = nullptr;
2628 delete $3;
2629 }
2630 }
2631 ;
2632
2633aggregate_key:
2634 aggregate_data
2635 | aggregate_control
2636 ;
2637
2638aggregate_data:
2639 STRUCT vtable_opt
2640 { $$ = ast::AggregateDecl::Struct; }
2641 | UNION
2642 { $$ = ast::AggregateDecl::Union; }
2643 | EXCEPTION // CFA
2644 { $$ = ast::AggregateDecl::Exception; }
2645 ;
2646
2647aggregate_control: // CFA
2648 MONITOR
2649 { $$ = ast::AggregateDecl::Monitor; }
2650 | MUTEX STRUCT
2651 { $$ = ast::AggregateDecl::Monitor; }
2652 | GENERATOR
2653 { $$ = ast::AggregateDecl::Generator; }
2654 | MUTEX GENERATOR
2655 {
2656 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2657 $$ = ast::AggregateDecl::NoAggregate;
2658 }
2659 | COROUTINE
2660 { $$ = ast::AggregateDecl::Coroutine; }
2661 | MUTEX COROUTINE
2662 {
2663 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2664 $$ = ast::AggregateDecl::NoAggregate;
2665 }
2666 | THREAD
2667 { $$ = ast::AggregateDecl::Thread; }
2668 | MUTEX THREAD
2669 {
2670 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2671 $$ = ast::AggregateDecl::NoAggregate;
2672 }
2673 ;
2674
2675field_declaration_list_opt:
2676 // empty
2677 { $$ = nullptr; }
2678 | field_declaration_list_opt field_declaration
2679 { $$ = $1 ? $1->set_last( $2 ) : $2; }
2680 ;
2681
2682field_declaration:
2683 type_specifier field_declaring_list_opt ';'
2684 {
2685 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2686 $$ = fieldDecl( $1, $2 );
2687 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2688 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2689 // printf( "\tattr %s\n", attr->name.c_str() );
2690 // } // for
2691 }
2692 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2693 {
2694 SemanticError( yylloc, "syntax error, expecting ';' at end of previous declaration." );
2695 $$ = nullptr;
2696 }
2697 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2698 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2699 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2700 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2701 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2702 {
2703 if ( ! $3 ) { // field declarator ?
2704 $3 = DeclarationNode::newName( nullptr );
2705 } // if
2706 $3->inLine = true;
2707 $$ = distAttr( $2, $3 ); // mark all fields in list
2708 distInl( $3 );
2709 }
2710 | INLINE aggregate_control ';' // CFA
2711 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2712 | typedef_declaration ';' // CFA
2713 | cfa_field_declaring_list ';' // CFA, new style field declaration
2714 | EXTENSION cfa_field_declaring_list ';' // GCC
2715 { distExt( $2 ); $$ = $2; } // mark all fields in list
2716 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2717 { $$ = $2; } // mark all fields in list
2718 | cfa_typedef_declaration ';' // CFA
2719 | static_assert // C11
2720 ;
2721
2722field_declaring_list_opt:
2723 // empty
2724 { $$ = nullptr; }
2725 | field_declarator
2726 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2727 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2728 ;
2729
2730field_declarator:
2731 bit_subrange_size // C special case, no field name
2732 { $$ = DeclarationNode::newBitfield( $1 ); }
2733 | variable_declarator bit_subrange_size_opt
2734 // A semantic check is required to ensure bit_subrange only appears on integral types.
2735 { $$ = $1->addBitfield( $2 ); }
2736 | variable_type_redeclarator bit_subrange_size_opt
2737 // A semantic check is required to ensure bit_subrange only appears on integral types.
2738 { $$ = $1->addBitfield( $2 ); }
2739 | function_type_redeclarator bit_subrange_size_opt
2740 // A semantic check is required to ensure bit_subrange only appears on integral types.
2741 { $$ = $1->addBitfield( $2 ); }
2742 ;
2743
2744field_abstract_list_opt:
2745 // empty
2746 { $$ = nullptr; }
2747 | field_abstract
2748 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2749 { $$ = $1->set_last( $4->addQualifiers( $3 ) ); }
2750 ;
2751
2752field_abstract:
2753 // no bit fields
2754 variable_abstract_declarator
2755 ;
2756
2757cfa_field_declaring_list: // CFA, new style field declaration
2758 // bit-fields are handled by C declarations
2759 cfa_abstract_declarator_tuple identifier_or_type_name
2760 { $$ = $1->addName( $2 ); }
2761 | cfa_field_declaring_list ',' identifier_or_type_name
2762 { $$ = $1->set_last( $1->cloneType( $3 ) ); }
2763 ;
2764
2765cfa_field_abstract_list: // CFA, new style field declaration
2766 // bit-fields are handled by C declarations
2767 cfa_abstract_declarator_tuple
2768 | cfa_field_abstract_list ','
2769 { $$ = $1->set_last( $1->cloneType( 0 ) ); }
2770 ;
2771
2772bit_subrange_size_opt:
2773 // empty
2774 { $$ = nullptr; }
2775 | bit_subrange_size
2776 ;
2777
2778bit_subrange_size:
2779 ':' assignment_expression
2780 { $$ = $2; }
2781 ;
2782
2783// ************************** ENUMERATION *******************************
2784
2785enum_type:
2786 // anonymous, no type name
2787 ENUM attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2788 {
2789 if ( $3 == EnumHiding::Hide ) {
2790 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2791 } // if
2792 $$ = DeclarationNode::newEnum( nullptr, $5, true, false )->addQualifiers( $2 );
2793 }
2794 | ENUM enumerator_type attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2795 {
2796 if ( $2 && ($2->storageClasses.val != 0 || $2->type->qualifiers.any()) ) {
2797 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2798 }
2799 if ( $4 == EnumHiding::Hide ) {
2800 SemanticError( yylloc, "syntax error, hiding ('!') the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr;
2801 } // if
2802 $$ = DeclarationNode::newEnum( nullptr, $6, true, true, $2 )->addQualifiers( $3 );
2803 }
2804
2805 // named type
2806 | ENUM attribute_list_opt identifier
2807 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2808 hide_opt '{' enumerator_list comma_opt '}'
2809 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2810 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2811 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2812 | ENUM enumerator_type attribute_list_opt identifier attribute_list_opt
2813 {
2814 if ( $2 && ($2->storageClasses.any() || $2->type->qualifiers.val != 0) ) {
2815 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2816 }
2817 typedefTable.makeTypedef( *$4, "enum_type 2" );
2818 }
2819 hide_opt '{' enumerator_list comma_opt '}'
2820 { $$ = DeclarationNode::newEnum( $4, $9, true, true, $2, $7 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2821 | ENUM enumerator_type attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2822 { $$ = DeclarationNode::newEnum( $4->name, $8, true, true, $2, $6 )->addQualifiers( $3 )->addQualifiers( $5 ); }
2823
2824 // forward declaration
2825 | enum_type_nobody
2826 ;
2827
2828enumerator_type:
2829 '(' ')' // pure enumeration
2830 { $$ = nullptr; }
2831 | '(' cfa_abstract_parameter_declaration ')' // typed enumeration
2832 { $$ = $2; }
2833 ;
2834
2835hide_opt:
2836 // empty
2837 { $$ = EnumHiding::Visible; }
2838 | '!'
2839 { $$ = EnumHiding::Hide; }
2840 ;
2841
2842enum_type_nobody: // enum - {...}
2843 ENUM attribute_list_opt identifier
2844 {
2845 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2846 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2847 }
2848 | ENUM attribute_list_opt type_name
2849 {
2850 typedefTable.makeTypedef( *$3->symbolic.name, "enum_type_nobody 2" );
2851 $$ = DeclarationNode::newEnum( $3->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2852 }
2853 ;
2854
2855enumerator_list:
2856 visible_hide_opt identifier_or_type_name enumerator_value_opt
2857 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2858 | INLINE type_name
2859 {
2860 $$ = DeclarationNode::newEnumInLine( $2->symbolic.name );
2861 $2->symbolic.name = nullptr;
2862 delete $2;
2863 }
2864 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2865 { $$ = $1->set_last( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2866 | enumerator_list ',' INLINE type_name
2867 { $$ = $1->set_last( DeclarationNode::newEnumInLine( $4->symbolic.name ) ); }
2868 ;
2869
2870visible_hide_opt:
2871 hide_opt
2872 | '^'
2873 { $$ = EnumHiding::Visible; }
2874 ;
2875
2876enumerator_value_opt:
2877 // empty
2878 { $$ = nullptr; }
2879 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2880 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2881 // | simple_assignment_operator initializer
2882 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2883 ;
2884
2885// ************************** FUNCTION PARAMETERS *******************************
2886
2887parameter_list_ellipsis_opt:
2888 // empty
2889 { $$ = nullptr; }
2890 | ELLIPSIS
2891 { $$ = nullptr; }
2892 | parameter_list
2893 | parameter_list ',' ELLIPSIS
2894 { $$ = $1->addVarArgs(); }
2895 ;
2896
2897parameter_list: // abstract + real
2898 parameter_declaration
2899 | abstract_parameter_declaration
2900 | parameter_list ',' parameter_declaration
2901 { $$ = $1->set_last( $3 ); }
2902 | parameter_list ',' abstract_parameter_declaration
2903 { $$ = $1->set_last( $3 ); }
2904 ;
2905
2906cfa_parameter_list_ellipsis_opt: // CFA, abstract + real
2907 // empty
2908 { $$ = DeclarationNode::newFromTypeData( build_basic_type( TypeData::Void ) ); }
2909 | ELLIPSIS
2910 { $$ = nullptr; }
2911 | cfa_parameter_list
2912 | cfa_abstract_parameter_list
2913 | cfa_parameter_list ',' cfa_abstract_parameter_list
2914 { $$ = $1->set_last( $3 ); }
2915 | cfa_parameter_list ',' ELLIPSIS
2916 { $$ = $1->addVarArgs(); }
2917 | cfa_abstract_parameter_list ',' ELLIPSIS
2918 { $$ = $1->addVarArgs(); }
2919 ;
2920
2921cfa_parameter_list: // CFA
2922 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2923 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2924 cfa_parameter_declaration
2925 | cfa_abstract_parameter_list ',' cfa_parameter_declaration
2926 { $$ = $1->set_last( $3 ); }
2927 | cfa_parameter_list ',' cfa_parameter_declaration
2928 { $$ = $1->set_last( $3 ); }
2929 | cfa_parameter_list ',' cfa_abstract_parameter_list ',' cfa_parameter_declaration
2930 { $$ = $1->set_last( $3 )->set_last( $5 ); }
2931 ;
2932
2933cfa_abstract_parameter_list: // CFA, new & old style abstract
2934 cfa_abstract_parameter_declaration
2935 | cfa_abstract_parameter_list ',' cfa_abstract_parameter_declaration
2936 { $$ = $1->set_last( $3 ); }
2937 ;
2938
2939// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2940// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2941
2942parameter_declaration:
2943 // No SUE declaration in parameter list.
2944 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2945 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2946 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2947 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2948 ;
2949
2950abstract_parameter_declaration:
2951 declaration_specifier_nobody default_initializer_opt
2952 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2953 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2954 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2955 ;
2956
2957cfa_parameter_declaration: // CFA, new & old style parameter declaration
2958 parameter_declaration
2959 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2960 { $$ = $1->addName( $2 ); }
2961 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2962 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2963 { $$ = $1->addName( $2 ); }
2964 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2965 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2966 | cfa_function_specifier // int f( "int fp()" );
2967 ;
2968
2969cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2970 abstract_parameter_declaration
2971 | cfa_identifier_parameter_declarator_no_tuple
2972 | cfa_abstract_tuple
2973 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2974 | type_qualifier_list cfa_abstract_tuple
2975 { $$ = $2->addQualifiers( $1 ); }
2976 | cfa_abstract_function // int f( "int ()" );
2977 ;
2978
2979// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2980// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2981// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2982
2983identifier_list: // K&R-style parameter list => no types
2984 identifier
2985 { $$ = DeclarationNode::newName( $1 ); }
2986 | identifier_list ',' identifier
2987 { $$ = $1->set_last( DeclarationNode::newName( $3 ) ); }
2988 ;
2989
2990type_no_function: // sizeof, alignof, cast (constructor)
2991 cfa_abstract_declarator_tuple // CFA
2992 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2993 | type_specifier abstract_declarator
2994 { $$ = $2->addType( $1 ); }
2995 ;
2996
2997type: // typeof, assertion
2998 type_no_function
2999 | cfa_abstract_function // CFA
3000 ;
3001
3002initializer_opt:
3003 // empty
3004 { $$ = nullptr; }
3005 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
3006 | '=' VOID { $$ = new InitializerNode( true ); }
3007 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
3008 ;
3009
3010initializer:
3011 assignment_expression { $$ = new InitializerNode( $1 ); }
3012 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
3013 ;
3014
3015initializer_list_opt:
3016 // empty
3017 { $$ = nullptr; }
3018 | initializer
3019 | designation initializer { $$ = $2->set_designators( $1 ); }
3020 | initializer_list_opt ',' initializer { $$ = $1->set_last( $3 ); }
3021 | initializer_list_opt ',' designation initializer { $$ = $1->set_last( $4->set_designators( $3 ) ); }
3022 ;
3023
3024// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
3025// '=' to separator the designator from the initializer value, as in:
3026//
3027// int x[10] = { [1] = 3 };
3028//
3029// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
3030// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
3031// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
3032// shift/reduce conflicts
3033
3034designation:
3035 designator_list ':' // C99, CFA uses ":" instead of "="
3036 | identifier_at ':' // GCC, field name
3037 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
3038 ;
3039
3040designator_list: // C99
3041 designator
3042 | designator_list designator
3043 { $$ = $1->set_last( $2 ); }
3044 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
3045 ;
3046
3047designator:
3048 '.' identifier_at // C99, field name
3049 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
3050 | '[' push assignment_expression pop ']' // C99, single array element
3051 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
3052 { $$ = $3; }
3053 | '[' push subrange pop ']' // CFA, multiple array elements
3054 { $$ = $3; }
3055 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
3056 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
3057 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
3058 { $$ = $4; }
3059 ;
3060
3061// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
3062// rather than an object-oriented type system. This required four groups of extensions:
3063//
3064// Overloading: function, data, and operator identifiers may be overloaded.
3065//
3066// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
3067// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
3068// definitions of new types. Type declarations with storage class "extern" provide opaque types.
3069//
3070// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
3071// site. A polymorphic function is not a template; it is a function, with an address and a type.
3072//
3073// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
3074// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
3075// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
3076// types provide the operations declared by a specification. Assertions are normally used to declare requirements
3077// on type arguments of polymorphic functions.
3078
3079type_parameter_list: // CFA
3080 type_parameter
3081 | type_parameter_list ',' type_parameter
3082 { $$ = $1->set_last( $3 ); }
3083 ;
3084
3085type_initializer_opt: // CFA
3086 // empty
3087 { $$ = nullptr; }
3088 | '=' type
3089 { $$ = $2; }
3090 ;
3091
3092type_parameter: // CFA
3093 type_class identifier_or_type_name
3094 {
3095 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
3096 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
3097 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
3098 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
3099 }
3100 type_initializer_opt assertion_list_opt
3101 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3102 | identifier_or_type_name new_type_class
3103 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
3104 type_initializer_opt assertion_list_opt
3105 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
3106 | '[' identifier_or_type_name ']'
3107 {
3108 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
3109 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
3110 }
3111 // | type_specifier identifier_parameter_declarator
3112 | assertion_list
3113 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
3114 | ENUM '(' identifier_or_type_name ')' identifier_or_type_name new_type_class type_initializer_opt assertion_list_opt
3115 {
3116 typedefTable.addToScope( *$3, TYPEDIMname, "type_parameter 4" );
3117 typedefTable.addToScope( *$5, TYPEDIMname, "type_parameter 5" );
3118 $$ = DeclarationNode::newTypeParam( $6, $5 )->addTypeInitializer( $7 )->addAssertions( $8 );
3119 }
3120 ;
3121
3122new_type_class: // CFA
3123 // empty
3124 { $$ = ast::TypeDecl::Otype; }
3125 | '&'
3126 { $$ = ast::TypeDecl::Dtype; }
3127 | '*'
3128 { $$ = ast::TypeDecl::DStype; } // Dtype + sized
3129 // | '(' '*' ')' // Gregor made me do it
3130 // { $$ = ast::TypeDecl::Ftype; }
3131 | ELLIPSIS
3132 { $$ = ast::TypeDecl::Ttype; }
3133 ;
3134
3135type_class: // CFA
3136 OTYPE
3137 { $$ = ast::TypeDecl::Otype; }
3138 | DTYPE
3139 { $$ = ast::TypeDecl::Dtype; }
3140 | FTYPE
3141 { $$ = ast::TypeDecl::Ftype; }
3142 | TTYPE
3143 { $$ = ast::TypeDecl::Ttype; }
3144 ;
3145
3146assertion_list_opt: // CFA
3147 // empty
3148 { $$ = nullptr; }
3149 | assertion_list
3150 ;
3151
3152assertion_list: // CFA
3153 assertion
3154 | assertion_list assertion
3155 { $$ = $1->set_last( $2 ); }
3156 ;
3157
3158assertion: // CFA
3159 '|' identifier_or_type_name '(' type_list ')'
3160 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3161 | '|' '{' push trait_declaration_list pop '}'
3162 { $$ = $4; }
3163 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3164 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3165 ;
3166
3167type_list: // CFA
3168 type
3169 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3170 | assignment_expression
3171 | type_list ',' type
3172 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
3173 | type_list ',' assignment_expression
3174 { $$ = $1->set_last( $3 ); }
3175 ;
3176
3177type_declaring_list: // CFA
3178 OTYPE type_declarator
3179 { $$ = $2; }
3180 | storage_class_list OTYPE type_declarator
3181 { $$ = $3->addQualifiers( $1 ); }
3182 | type_declaring_list ',' type_declarator
3183 { $$ = $1->set_last( $3->copySpecifiers( $1 ) ); }
3184 ;
3185
3186type_declarator: // CFA
3187 type_declarator_name assertion_list_opt
3188 { $$ = $1->addAssertions( $2 ); }
3189 | type_declarator_name assertion_list_opt '=' type
3190 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3191 ;
3192
3193type_declarator_name: // CFA
3194 identifier_or_type_name
3195 {
3196 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3197 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3198 }
3199 | identifier_or_type_name '(' type_parameter_list ')'
3200 {
3201 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3202 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3203 }
3204 ;
3205
3206trait_specifier: // CFA
3207 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3208 {
3209 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3210 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3211 }
3212 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3213 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3214 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3215 {
3216 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3217 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3218 }
3219 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3220 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3221 ;
3222
3223trait_declaration_list: // CFA
3224 trait_declaration
3225 | trait_declaration_list pop push trait_declaration
3226 { $$ = $1->set_last( $4 ); }
3227 ;
3228
3229trait_declaration: // CFA
3230 cfa_trait_declaring_list ';'
3231 | trait_declaring_list ';'
3232 ;
3233
3234cfa_trait_declaring_list: // CFA
3235 cfa_variable_specifier
3236 | cfa_function_specifier
3237 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3238 { $$ = $1->set_last( $1->cloneType( $5 ) ); }
3239 ;
3240
3241trait_declaring_list: // CFA
3242 type_specifier declarator
3243 { $$ = $2->addType( $1 ); }
3244 | trait_declaring_list pop ',' push declarator
3245 { $$ = $1->set_last( $1->cloneBaseType( $5 ) ); }
3246 ;
3247
3248// **************************** EXTERNAL DEFINITIONS *****************************
3249
3250translation_unit:
3251 // empty, input file
3252 | external_definition_list
3253 { parseTree = parseTree ? parseTree->set_last( $1 ) : $1; }
3254 ;
3255
3256external_definition_list:
3257 push external_definition pop
3258 { $$ = $2; }
3259 | external_definition_list push external_definition pop
3260 { $$ = $1 ? $1->set_last( $3 ) : $3; }
3261 ;
3262
3263external_definition_list_opt:
3264 // empty
3265 { $$ = nullptr; }
3266 | external_definition_list
3267 ;
3268
3269up:
3270 { typedefTable.up( forall ); forall = false; }
3271 ;
3272
3273down:
3274 { typedefTable.down(); }
3275 ;
3276
3277external_definition:
3278 DIRECTIVE
3279 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3280 | declaration
3281 {
3282 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3283 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3284 // disallowed at the moment.
3285 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static &&
3286 $1->type && $1->type->kind == TypeData::AggregateInst ) {
3287 if ( $1->type->aggInst.aggregate->aggregate.anon ) {
3288 SemanticError( yylloc, "extern anonymous aggregate is currently unimplemented." ); $$ = nullptr;
3289 }
3290 }
3291 }
3292 | IDENTIFIER IDENTIFIER
3293 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3294 | IDENTIFIER type_qualifier // invalid syntax rule
3295 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3296 | IDENTIFIER storage_class // invalid syntax rule
3297 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3298 | IDENTIFIER basic_type_name // invalid syntax rule
3299 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3300 | IDENTIFIER TYPEDEFname // invalid syntax rule
3301 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3302 | IDENTIFIER TYPEGENname // invalid syntax rule
3303 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3304 | external_function_definition
3305 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3306 {
3307 distExt( $2 ); // mark all fields in list
3308 $$ = $2;
3309 }
3310 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3311 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3312 | EXTERN STRINGliteral
3313 {
3314 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3315 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3316 }
3317 up external_definition down
3318 {
3319 linkage = linkageStack.top();
3320 linkageStack.pop();
3321 $$ = $5;
3322 }
3323 | EXTERN STRINGliteral // C++-style linkage specifier
3324 {
3325 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3326 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3327 }
3328 '{' up external_definition_list_opt down '}'
3329 {
3330 linkage = linkageStack.top();
3331 linkageStack.pop();
3332 $$ = $6;
3333 }
3334 // global distribution
3335 | type_qualifier_list
3336 {
3337 if ( $1->type->qualifiers.any() ) {
3338 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3339 }
3340 if ( $1->type->forall ) forall = true; // remember generic type
3341 }
3342 '{' up external_definition_list_opt down '}' // CFA, namespace
3343 {
3344 distQual( $5, $1 );
3345 forall = false;
3346 $$ = $5;
3347 }
3348 | declaration_qualifier_list
3349 {
3350 if ( $1->type && $1->type->qualifiers.any() ) {
3351 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3352 }
3353 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3354 }
3355 '{' up external_definition_list_opt down '}' // CFA, namespace
3356 {
3357 distQual( $5, $1 );
3358 forall = false;
3359 $$ = $5;
3360 }
3361 | declaration_qualifier_list type_qualifier_list
3362 {
3363 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3364 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3365 }
3366 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3367 }
3368 '{' up external_definition_list_opt down '}' // CFA, namespace
3369 {
3370 distQual( $6, $1->addQualifiers( $2 ) );
3371 forall = false;
3372 $$ = $6;
3373 }
3374 ;
3375
3376external_function_definition:
3377 function_definition
3378 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3379 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3380 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3381 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3382 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3383 | function_declarator compound_statement
3384 { $$ = $1->addFunctionBody( $2 ); }
3385 | KR_function_declarator KR_parameter_list_opt compound_statement
3386 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3387 ;
3388
3389with_clause_opt:
3390 // empty
3391 { $$ = nullptr; forall = false; }
3392 | WITH '(' type_list ')' attribute_list_opt // support scoped enumeration
3393 {
3394 $$ = $3; forall = false;
3395 if ( $5 ) {
3396 SemanticError( yylloc, "syntax error, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3397 $$ = nullptr;
3398 } // if
3399 }
3400 ;
3401
3402function_definition:
3403 cfa_function_declaration with_clause_opt compound_statement // CFA
3404 {
3405 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3406 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3407 $1->get_last()->addFunctionBody( $3, $2 );
3408 $$ = $1;
3409 }
3410 | declaration_specifier function_declarator with_clause_opt compound_statement
3411 {
3412 rebindForall( $1, $2 );
3413 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3414 }
3415 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3416 {
3417 rebindForall( $1, $2 );
3418 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3419 }
3420 // handles default int return type, OBSOLESCENT (see 1)
3421 | type_qualifier_list function_declarator with_clause_opt compound_statement
3422 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3423 // handles default int return type, OBSOLESCENT (see 1)
3424 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3425 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3426 // handles default int return type, OBSOLESCENT (see 1)
3427 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3428 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3429
3430 // Old-style K&R function definition, OBSOLESCENT (see 4)
3431 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3432 {
3433 rebindForall( $1, $2 );
3434 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3435 }
3436 // handles default int return type, OBSOLESCENT (see 1)
3437 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3438 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3439 // handles default int return type, OBSOLESCENT (see 1)
3440 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3441 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3442 // handles default int return type, OBSOLESCENT (see 1)
3443 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3444 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3445 ;
3446
3447declarator:
3448 variable_declarator
3449 | variable_type_redeclarator
3450 | function_declarator
3451 | function_type_redeclarator
3452 ;
3453
3454subrange:
3455 constant_expression '~' constant_expression // CFA, integer subrange
3456 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3457 ;
3458
3459// **************************** ASM *****************************
3460
3461asm_name_opt: // GCC
3462 // empty
3463 { $$ = nullptr; }
3464 | ASM '(' string_literal ')' attribute_list_opt
3465 {
3466 DeclarationNode * name = new DeclarationNode();
3467 name->asmName = maybeMoveBuild( $3 );
3468 $$ = name->addQualifiers( $5 );
3469 }
3470 ;
3471
3472// **************************** ATTRIBUTE *****************************
3473
3474attribute_list_opt: // GCC
3475 // empty
3476 { $$ = nullptr; }
3477 | attribute_list
3478 ;
3479
3480attribute_list: // GCC
3481 attribute
3482 | attribute_list attribute
3483 { $$ = $2->addQualifiers( $1 ); }
3484 ;
3485
3486attribute: // GCC
3487 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3488 { $$ = $4; }
3489 | ATTRIBUTE '(' attribute_name_list ')' // CFA
3490 { $$ = $3; }
3491 | ATTR '(' attribute_name_list ')' // CFA
3492 { $$ = $3; }
3493 ;
3494
3495attribute_name_list: // GCC
3496 attribute_name
3497 | attribute_name_list ',' attribute_name
3498 { $$ = $3->addQualifiers( $1 ); }
3499 ;
3500
3501attribute_name: // GCC
3502 // empty
3503 { $$ = nullptr; }
3504 | attr_name
3505 { $$ = DeclarationNode::newAttribute( $1 ); }
3506 | attr_name '(' argument_expression_list_opt ')'
3507 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3508 ;
3509
3510attr_name: // GCC
3511 identifier_or_type_name
3512 | FALLTHROUGH
3513 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3514 | CONST
3515 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3516 ;
3517
3518// ============================================================================
3519// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3520// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3521// in:
3522//
3523// int (*f())[10] { ... };
3524// ... (*f())[3] += 1; // definition mimics usage
3525//
3526// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3527// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3528// ============================================================================
3529
3530// ----------------------------------------------------------------------------
3531// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3532// to define a variable or function prototype, e.g.:
3533//
3534// valid declaration invalid definition
3535// ----------------- ------------------
3536// int f; int f {}
3537// int *f; int *f {}
3538// int f[10]; int f[10] {}
3539// int (*f)(int); int (*f)(int) {}
3540//
3541// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3542// variable_declarator and function_declarator.
3543// ----------------------------------------------------------------------------
3544
3545// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3546// declaring an array of functions versus a pointer to an array of functions.
3547
3548paren_identifier:
3549 identifier_at
3550 { $$ = DeclarationNode::newName( $1 ); }
3551 | '(' paren_identifier ')' // redundant parenthesis
3552 { $$ = $2; }
3553 ;
3554
3555variable_declarator:
3556 paren_identifier attribute_list_opt
3557 { $$ = $1->addQualifiers( $2 ); }
3558 | variable_ptr
3559 | variable_array attribute_list_opt
3560 { $$ = $1->addQualifiers( $2 ); }
3561 | variable_function attribute_list_opt
3562 { $$ = $1->addQualifiers( $2 ); }
3563 ;
3564
3565variable_ptr:
3566 ptrref_operator variable_declarator
3567 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3568 | ptrref_operator type_qualifier_list variable_declarator
3569 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3570 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3571 { $$ = $2->addQualifiers( $4 ); }
3572 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3573 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3574 ;
3575
3576variable_array:
3577 paren_identifier array_dimension
3578 { $$ = $1->addArray( $2 ); }
3579 | '(' variable_ptr ')' array_dimension
3580 { $$ = $2->addArray( $4 ); }
3581 | '(' attribute_list variable_ptr ')' array_dimension
3582 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3583 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3584 { $$ = $2->addArray( $4 ); }
3585 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3586 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3587 | '(' variable_array ')' // redundant parenthesis
3588 { $$ = $2; }
3589 | '(' attribute_list variable_array ')' // redundant parenthesis
3590 { $$ = $3->addQualifiers( $2 ); }
3591 ;
3592
3593variable_function:
3594 '(' variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3595 { $$ = $2->addParamList( $5 ); }
3596 | '(' attribute_list variable_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3597 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3598 | '(' variable_function ')' // redundant parenthesis
3599 { $$ = $2; }
3600 | '(' attribute_list variable_function ')' // redundant parenthesis
3601 { $$ = $3->addQualifiers( $2 ); }
3602 ;
3603
3604// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3605// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3606// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3607
3608function_declarator:
3609 function_no_ptr attribute_list_opt
3610 { $$ = $1->addQualifiers( $2 ); }
3611 | function_ptr
3612 | function_array attribute_list_opt
3613 { $$ = $1->addQualifiers( $2 ); }
3614 ;
3615
3616function_no_ptr:
3617 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3618 { $$ = $1->addParamList( $3 ); }
3619 | '(' function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3620 { $$ = $2->addParamList( $5 ); }
3621 | '(' attribute_list function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3622 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3623 | '(' function_no_ptr ')' // redundant parenthesis
3624 { $$ = $2; }
3625 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3626 { $$ = $3->addQualifiers( $2 ); }
3627 ;
3628
3629function_ptr:
3630 ptrref_operator function_declarator
3631 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3632 | ptrref_operator type_qualifier_list function_declarator
3633 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3634 | '(' function_ptr ')' attribute_list_opt
3635 { $$ = $2->addQualifiers( $4 ); }
3636 | '(' attribute_list function_ptr ')' attribute_list_opt
3637 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3638 ;
3639
3640function_array:
3641 '(' function_ptr ')' array_dimension
3642 { $$ = $2->addArray( $4 ); }
3643 | '(' attribute_list function_ptr ')' array_dimension
3644 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3645 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3646 { $$ = $2->addArray( $4 ); }
3647 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3648 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3649 | '(' function_array ')' // redundant parenthesis
3650 { $$ = $2; }
3651 | '(' attribute_list function_array ')' // redundant parenthesis
3652 { $$ = $3->addQualifiers( $2 ); }
3653 ;
3654
3655// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3656//
3657// f( a, b, c ) int a, *b, c[]; {}
3658//
3659// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3660// returning arrays and functions versus pointers to arrays and functions.
3661
3662KR_function_declarator:
3663 KR_function_no_ptr
3664 | KR_function_ptr
3665 | KR_function_array
3666 ;
3667
3668KR_function_no_ptr:
3669 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3670 { $$ = $1->addIdList( $3 ); }
3671 | '(' KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3672 { $$ = $2->addParamList( $5 ); }
3673 | '(' attribute_list KR_function_ptr ')' '(' parameter_list_ellipsis_opt ')'
3674 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3675 | '(' KR_function_no_ptr ')' // redundant parenthesis
3676 { $$ = $2; }
3677 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3678 { $$ = $3->addQualifiers( $2 ); }
3679 ;
3680
3681KR_function_ptr:
3682 ptrref_operator KR_function_declarator
3683 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3684 | ptrref_operator type_qualifier_list KR_function_declarator
3685 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3686 | '(' KR_function_ptr ')'
3687 { $$ = $2; }
3688 | '(' attribute_list KR_function_ptr ')'
3689 { $$ = $3->addQualifiers( $2 ); }
3690 ;
3691
3692KR_function_array:
3693 '(' KR_function_ptr ')' array_dimension
3694 { $$ = $2->addArray( $4 ); }
3695 | '(' attribute_list KR_function_ptr ')' array_dimension
3696 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3697 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3698 { $$ = $2->addArray( $4 ); }
3699 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3700 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3701 | '(' KR_function_array ')' // redundant parenthesis
3702 { $$ = $2; }
3703 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3704 { $$ = $3->addQualifiers( $2 ); }
3705 ;
3706
3707// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3708//
3709// typedef int foo;
3710// {
3711// int foo; // redefine typedef name in new scope
3712// }
3713
3714paren_type:
3715 typedef_name
3716 {
3717 // hide type name in enclosing scope by variable name
3718 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3719 }
3720 | '(' paren_type ')'
3721 { $$ = $2; }
3722 ;
3723
3724variable_type_redeclarator:
3725 paren_type attribute_list_opt
3726 { $$ = $1->addQualifiers( $2 ); }
3727 | variable_type_ptr
3728 | variable_type_array attribute_list_opt
3729 { $$ = $1->addQualifiers( $2 ); }
3730 | variable_type_function attribute_list_opt
3731 { $$ = $1->addQualifiers( $2 ); }
3732 ;
3733
3734variable_type_ptr:
3735 ptrref_operator variable_type_redeclarator
3736 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3737 | ptrref_operator type_qualifier_list variable_type_redeclarator
3738 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3739 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3740 { $$ = $2->addQualifiers( $4 ); }
3741 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3742 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3743 ;
3744
3745variable_type_array:
3746 paren_type array_dimension
3747 { $$ = $1->addArray( $2 ); }
3748 | '(' variable_type_ptr ')' array_dimension
3749 { $$ = $2->addArray( $4 ); }
3750 | '(' attribute_list variable_type_ptr ')' array_dimension
3751 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3752 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3753 { $$ = $2->addArray( $4 ); }
3754 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3755 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3756 | '(' variable_type_array ')' // redundant parenthesis
3757 { $$ = $2; }
3758 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3759 { $$ = $3->addQualifiers( $2 ); }
3760 ;
3761
3762variable_type_function:
3763 '(' variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3764 { $$ = $2->addParamList( $5 ); }
3765 | '(' attribute_list variable_type_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3766 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3767 | '(' variable_type_function ')' // redundant parenthesis
3768 { $$ = $2; }
3769 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3770 { $$ = $3->addQualifiers( $2 ); }
3771 ;
3772
3773// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3774// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3775// arrays and functions.
3776
3777function_type_redeclarator:
3778 function_type_no_ptr attribute_list_opt
3779 { $$ = $1->addQualifiers( $2 ); }
3780 | function_type_ptr
3781 | function_type_array attribute_list_opt
3782 { $$ = $1->addQualifiers( $2 ); }
3783 ;
3784
3785function_type_no_ptr:
3786 paren_type '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3787 { $$ = $1->addParamList( $3 ); }
3788 | '(' function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3789 { $$ = $2->addParamList( $5 ); }
3790 | '(' attribute_list function_type_ptr ')' '(' parameter_list_ellipsis_opt ')'
3791 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3792 | '(' function_type_no_ptr ')' // redundant parenthesis
3793 { $$ = $2; }
3794 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3795 { $$ = $3->addQualifiers( $2 ); }
3796 ;
3797
3798function_type_ptr:
3799 ptrref_operator function_type_redeclarator
3800 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3801 | ptrref_operator type_qualifier_list function_type_redeclarator
3802 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3803 | '(' function_type_ptr ')' attribute_list_opt
3804 { $$ = $2->addQualifiers( $4 ); }
3805 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3806 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3807 ;
3808
3809function_type_array:
3810 '(' function_type_ptr ')' array_dimension
3811 { $$ = $2->addArray( $4 ); }
3812 | '(' attribute_list function_type_ptr ')' array_dimension
3813 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3814 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3815 { $$ = $2->addArray( $4 ); }
3816 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3817 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3818 | '(' function_type_array ')' // redundant parenthesis
3819 { $$ = $2; }
3820 | '(' attribute_list function_type_array ')' // redundant parenthesis
3821 { $$ = $3->addQualifiers( $2 ); }
3822 ;
3823
3824// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3825// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3826// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3827// pointers to arrays and functions.
3828
3829identifier_parameter_declarator:
3830 paren_identifier attribute_list_opt
3831 { $$ = $1->addQualifiers( $2 ); }
3832 | '&' MUTEX paren_identifier attribute_list_opt
3833 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3834 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3835 | identifier_parameter_ptr
3836 | identifier_parameter_array attribute_list_opt
3837 { $$ = $1->addQualifiers( $2 ); }
3838 | identifier_parameter_function attribute_list_opt
3839 { $$ = $1->addQualifiers( $2 ); }
3840 ;
3841
3842identifier_parameter_ptr:
3843 ptrref_operator identifier_parameter_declarator
3844 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3845 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3846 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3847 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3848 { $$ = $2->addQualifiers( $4 ); }
3849 ;
3850
3851identifier_parameter_array:
3852 paren_identifier array_parameter_dimension
3853 { $$ = $1->addArray( $2 ); }
3854 | '(' identifier_parameter_ptr ')' array_dimension
3855 { $$ = $2->addArray( $4 ); }
3856 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3857 { $$ = $2->addArray( $4 ); }
3858 | '(' identifier_parameter_array ')' // redundant parenthesis
3859 { $$ = $2; }
3860 ;
3861
3862identifier_parameter_function:
3863 paren_identifier '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3864 { $$ = $1->addParamList( $3 ); }
3865 | '(' identifier_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3866 { $$ = $2->addParamList( $5 ); }
3867 | '(' identifier_parameter_function ')' // redundant parenthesis
3868 { $$ = $2; }
3869 ;
3870
3871// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3872// e.g.:
3873//
3874// typedef int foo;
3875// forall( otype T ) struct foo;
3876// int f( int foo ); // redefine typedef name in new scope
3877//
3878// and allows the C99 array options, which can only appear in a parameter list.
3879
3880type_parameter_redeclarator:
3881 typedef_name attribute_list_opt
3882 { $$ = $1->addQualifiers( $2 ); }
3883 | '&' MUTEX typedef_name attribute_list_opt
3884 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
3885 OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3886 | type_parameter_ptr
3887 | type_parameter_array attribute_list_opt
3888 { $$ = $1->addQualifiers( $2 ); }
3889 | type_parameter_function attribute_list_opt
3890 { $$ = $1->addQualifiers( $2 ); }
3891 ;
3892
3893typedef_name:
3894 TYPEDEFname
3895 { $$ = DeclarationNode::newName( $1 ); }
3896 | TYPEGENname
3897 { $$ = DeclarationNode::newName( $1 ); }
3898 ;
3899
3900type_parameter_ptr:
3901 ptrref_operator type_parameter_redeclarator
3902 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3903 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3904 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3905 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3906 { $$ = $2->addQualifiers( $4 ); }
3907 ;
3908
3909type_parameter_array:
3910 typedef_name array_parameter_dimension
3911 { $$ = $1->addArray( $2 ); }
3912 | '(' type_parameter_ptr ')' array_parameter_dimension
3913 { $$ = $2->addArray( $4 ); }
3914 ;
3915
3916type_parameter_function:
3917 typedef_name '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3918 { $$ = $1->addParamList( $3 ); }
3919 | '(' type_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3920 { $$ = $2->addParamList( $5 ); }
3921 ;
3922
3923// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3924// which the type applies, e.g.:
3925//
3926// sizeof( int );
3927// sizeof( int * );
3928// sizeof( int [10] );
3929// sizeof( int (*)() );
3930// sizeof( int () );
3931//
3932// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3933// and functions versus pointers to arrays and functions.
3934
3935abstract_declarator:
3936 abstract_ptr
3937 | abstract_array attribute_list_opt
3938 { $$ = $1->addQualifiers( $2 ); }
3939 | abstract_function attribute_list_opt
3940 { $$ = $1->addQualifiers( $2 ); }
3941 ;
3942
3943abstract_ptr:
3944 ptrref_operator
3945 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3946 | ptrref_operator type_qualifier_list
3947 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3948 | ptrref_operator abstract_declarator
3949 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3950 | ptrref_operator type_qualifier_list abstract_declarator
3951 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3952 | '(' abstract_ptr ')' attribute_list_opt
3953 { $$ = $2->addQualifiers( $4 ); }
3954 ;
3955
3956abstract_array:
3957 array_dimension
3958 | '(' abstract_ptr ')' array_dimension
3959 { $$ = $2->addArray( $4 ); }
3960 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3961 { $$ = $2->addArray( $4 ); }
3962 | '(' abstract_array ')' // redundant parenthesis
3963 { $$ = $2; }
3964 ;
3965
3966abstract_function:
3967 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3968 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3969 | '(' abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
3970 { $$ = $2->addParamList( $5 ); }
3971 | '(' abstract_function ')' // redundant parenthesis
3972 { $$ = $2; }
3973 ;
3974
3975array_dimension:
3976 // Only the first dimension can be empty.
3977 '[' ']'
3978 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3979 | '[' ']' multi_array_dimension
3980 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3981 // Cannot use constant_expression because of tuples => semantic check
3982 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3983 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3984 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3985
3986 // If needed, the following parses and does not use comma_expression, so the array structure can be built.
3987 // | '[' push assignment_expression pop ',' push array_dimension_list pop ']' // CFA
3988
3989 | '[' push array_type_list pop ']' // CFA
3990 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3991 | multi_array_dimension
3992 ;
3993
3994// array_dimension_list:
3995// assignment_expression
3996// | array_dimension_list ',' assignment_expression
3997// ;
3998
3999array_type_list:
4000 basic_type_name
4001 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
4002 | type_name
4003 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
4004 | assignment_expression upupeq assignment_expression
4005 | array_type_list ',' basic_type_name
4006 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
4007 | array_type_list ',' type_name
4008 { $$ = $1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) ); }
4009 | array_type_list ',' assignment_expression upupeq assignment_expression
4010 ;
4011
4012upupeq:
4013 '~'
4014 { $$ = OperKinds::LThan; }
4015 | ErangeUpEq
4016 { $$ = OperKinds::LEThan; }
4017 ;
4018
4019multi_array_dimension:
4020 '[' push assignment_expression pop ']'
4021 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
4022 | '[' push '*' pop ']' // C99
4023 { $$ = DeclarationNode::newVarArray( 0 ); }
4024 | multi_array_dimension '[' push assignment_expression pop ']'
4025 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
4026 | multi_array_dimension '[' push '*' pop ']' // C99
4027 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
4028 ;
4029
4030// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
4031// identifier to which the type applies, e.g.:
4032//
4033// int f( int ); // not handled here
4034// int f( int * ); // abstract function-prototype parameter; no parameter name specified
4035// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
4036// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
4037//
4038// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
4039// and functions versus pointers to arrays and functions. In addition, the pattern handles the special meaning of
4040// parenthesis around a typedef name:
4041//
4042// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
4043// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
4044// not as redundant parentheses around the identifier."
4045//
4046// For example:
4047//
4048// typedef float T;
4049// int f( int ( T [5] ) ); // see abstract_parameter_declarator
4050// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
4051// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
4052// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
4053//
4054// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
4055// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
4056// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
4057// functions.
4058
4059abstract_parameter_declarator_opt:
4060 // empty
4061 { $$ = nullptr; }
4062 | abstract_parameter_declarator
4063 ;
4064
4065abstract_parameter_declarator:
4066 abstract_parameter_ptr
4067 | '&' MUTEX attribute_list_opt
4068 { $$ = DeclarationNode::newPointer( DeclarationNode::newFromTypeData( build_type_qualifier( ast::CV::Mutex ) ),
4069 OperKinds::AddressOf )->addQualifiers( $3 ); }
4070 | abstract_parameter_array attribute_list_opt
4071 { $$ = $1->addQualifiers( $2 ); }
4072 | abstract_parameter_function attribute_list_opt
4073 { $$ = $1->addQualifiers( $2 ); }
4074 ;
4075
4076abstract_parameter_ptr:
4077 ptrref_operator
4078 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4079 | ptrref_operator type_qualifier_list
4080 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4081 | ptrref_operator abstract_parameter_declarator
4082 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4083 | ptrref_operator type_qualifier_list abstract_parameter_declarator
4084 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4085 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
4086 { $$ = $2->addQualifiers( $4 ); }
4087 ;
4088
4089abstract_parameter_array:
4090 array_parameter_dimension
4091 | '(' abstract_parameter_ptr ')' array_parameter_dimension
4092 { $$ = $2->addArray( $4 ); }
4093 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
4094 { $$ = $2->addArray( $4 ); }
4095 | '(' abstract_parameter_array ')' // redundant parenthesis
4096 { $$ = $2; }
4097 ;
4098
4099abstract_parameter_function:
4100 '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4101 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
4102 | '(' abstract_parameter_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4103 { $$ = $2->addParamList( $5 ); }
4104 | '(' abstract_parameter_function ')' // redundant parenthesis
4105 { $$ = $2; }
4106 ;
4107
4108array_parameter_dimension:
4109 // Only the first dimension can be empty or have qualifiers.
4110 array_parameter_1st_dimension
4111 | array_parameter_1st_dimension multi_array_dimension
4112 { $$ = $1->addArray( $2 ); }
4113 | multi_array_dimension
4114 ;
4115
4116// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
4117//
4118// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
4119// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
4120
4121array_parameter_1st_dimension:
4122 '[' ']'
4123 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
4124 // multi_array_dimension handles the '[' '*' ']' case
4125 | '[' push type_qualifier_list '*' pop ']' // remaining C99
4126 { $$ = DeclarationNode::newVarArray( $3 ); }
4127 | '[' push type_qualifier_list pop ']'
4128 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
4129 // multi_array_dimension handles the '[' assignment_expression ']' case
4130 | '[' push type_qualifier_list assignment_expression pop ']'
4131 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4132 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
4133 { $$ = DeclarationNode::newArray( $5, $4, true ); }
4134 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
4135 { $$ = DeclarationNode::newArray( $5, $3, true ); }
4136 ;
4137
4138// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
4139//
4140// struct S {
4141// int;
4142// int *;
4143// int [10];
4144// int (*)();
4145// };
4146
4147variable_abstract_declarator:
4148 variable_abstract_ptr
4149 | variable_abstract_array attribute_list_opt
4150 { $$ = $1->addQualifiers( $2 ); }
4151 | variable_abstract_function attribute_list_opt
4152 { $$ = $1->addQualifiers( $2 ); }
4153 ;
4154
4155variable_abstract_ptr:
4156 ptrref_operator
4157 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4158 | ptrref_operator type_qualifier_list
4159 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4160 | ptrref_operator variable_abstract_declarator
4161 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4162 | ptrref_operator type_qualifier_list variable_abstract_declarator
4163 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4164 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4165 { $$ = $2->addQualifiers( $4 ); }
4166 ;
4167
4168variable_abstract_array:
4169 array_dimension
4170 | '(' variable_abstract_ptr ')' array_dimension
4171 { $$ = $2->addArray( $4 ); }
4172 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4173 { $$ = $2->addArray( $4 ); }
4174 | '(' variable_abstract_array ')' // redundant parenthesis
4175 { $$ = $2; }
4176 ;
4177
4178variable_abstract_function:
4179 '(' variable_abstract_ptr ')' '(' parameter_list_ellipsis_opt ')' // empty parameter list OBSOLESCENT (see 3)
4180 { $$ = $2->addParamList( $5 ); }
4181 | '(' variable_abstract_function ')' // redundant parenthesis
4182 { $$ = $2; }
4183 ;
4184
4185// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4186// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4187
4188cfa_identifier_parameter_declarator_tuple: // CFA
4189 cfa_identifier_parameter_declarator_no_tuple
4190 | cfa_abstract_tuple
4191 | type_qualifier_list cfa_abstract_tuple
4192 { $$ = $2->addQualifiers( $1 ); }
4193 ;
4194
4195cfa_identifier_parameter_declarator_no_tuple: // CFA
4196 cfa_identifier_parameter_ptr
4197 | cfa_identifier_parameter_array
4198 ;
4199
4200cfa_identifier_parameter_ptr: // CFA
4201 // No SUE declaration in parameter list.
4202 ptrref_operator type_specifier_nobody
4203 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4204 | type_qualifier_list ptrref_operator type_specifier_nobody
4205 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4206 | ptrref_operator cfa_abstract_function
4207 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4208 | type_qualifier_list ptrref_operator cfa_abstract_function
4209 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4210 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4211 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4212 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4213 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4214 ;
4215
4216cfa_identifier_parameter_array: // CFA
4217 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4218 // shift/reduce conflict with new-style empty (void) function return type.
4219 '[' ']' type_specifier_nobody
4220 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4221 | cfa_array_parameter_1st_dimension type_specifier_nobody
4222 { $$ = $2->addNewArray( $1 ); }
4223 | '[' ']' multi_array_dimension type_specifier_nobody
4224 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4225 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4226 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4227 | multi_array_dimension type_specifier_nobody
4228 { $$ = $2->addNewArray( $1 ); }
4229
4230 | '[' ']' cfa_identifier_parameter_ptr
4231 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4232 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4233 { $$ = $2->addNewArray( $1 ); }
4234 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4235 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4236 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4237 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4238 | multi_array_dimension cfa_identifier_parameter_ptr
4239 { $$ = $2->addNewArray( $1 ); }
4240 ;
4241
4242cfa_array_parameter_1st_dimension:
4243 '[' push type_qualifier_list '*' pop ']' // remaining C99
4244 { $$ = DeclarationNode::newVarArray( $3 ); }
4245 | '[' push type_qualifier_list assignment_expression pop ']'
4246 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4247 | '[' push declaration_qualifier_list assignment_expression pop ']'
4248 // declaration_qualifier_list must be used because of shift/reduce conflict with
4249 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4250 // appear in this context.
4251 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4252 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4253 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4254 ;
4255
4256// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4257// identifier to which the type applies, e.g.:
4258//
4259// [int] f( int ); // abstract variable parameter; no parameter name specified
4260// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4261//
4262// These rules need LR(3):
4263//
4264// cfa_abstract_tuple identifier_or_type_name
4265// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_list_ellipsis_opt ')'
4266//
4267// since a function return type can be syntactically identical to a tuple type:
4268//
4269// [int, int] t;
4270// [int, int] f( int );
4271//
4272// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4273// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4274// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4275// duplicated when appearing with cfa_function_specifier.
4276
4277cfa_abstract_declarator_tuple: // CFA
4278 cfa_abstract_tuple
4279 | type_qualifier_list cfa_abstract_tuple
4280 { $$ = $2->addQualifiers( $1 ); }
4281 | cfa_abstract_declarator_no_tuple
4282 ;
4283
4284cfa_abstract_declarator_no_tuple: // CFA
4285 cfa_abstract_ptr
4286 | cfa_abstract_array
4287 ;
4288
4289cfa_abstract_ptr: // CFA
4290 ptrref_operator type_specifier
4291 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4292 | type_qualifier_list ptrref_operator type_specifier
4293 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4294 | ptrref_operator cfa_abstract_function
4295 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4296 | type_qualifier_list ptrref_operator cfa_abstract_function
4297 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4298 | ptrref_operator cfa_abstract_declarator_tuple
4299 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4300 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4301 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4302 ;
4303
4304cfa_abstract_array: // CFA
4305 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4306 // empty (void) function return type.
4307 '[' ']' type_specifier
4308 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4309 | '[' ']' multi_array_dimension type_specifier
4310 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4311 | multi_array_dimension type_specifier
4312 { $$ = $2->addNewArray( $1 ); }
4313 | '[' ']' cfa_abstract_ptr
4314 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4315 | '[' ']' multi_array_dimension cfa_abstract_ptr
4316 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4317 | multi_array_dimension cfa_abstract_ptr
4318 { $$ = $2->addNewArray( $1 ); }
4319 ;
4320
4321cfa_abstract_tuple: // CFA
4322 '[' push cfa_abstract_parameter_list pop ']'
4323 { $$ = DeclarationNode::newTuple( $3 ); }
4324 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4325 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4326 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4327 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4328 ;
4329
4330cfa_abstract_function: // CFA
4331 '[' ']' '(' cfa_parameter_list_ellipsis_opt ')'
4332 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4333 | cfa_abstract_tuple '(' push cfa_parameter_list_ellipsis_opt pop ')'
4334 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4335 | cfa_function_return '(' push cfa_parameter_list_ellipsis_opt pop ')'
4336 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4337 ;
4338
4339// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4340// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4341//
4342// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4343// the declaration specifiers in a declaration is an obsolescent feature."
4344//
4345// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4346// prototype-format parameter type declarators) is an obsolescent feature."
4347//
4348// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4349// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4350
4351// ************************ MISCELLANEOUS ********************************
4352
4353comma_opt: // redundant comma
4354 // empty
4355 | ','
4356 ;
4357
4358default_initializer_opt:
4359 // empty
4360 { $$ = nullptr; }
4361 | '=' assignment_expression
4362 { $$ = $2; }
4363 ;
4364
4365%%
4366
4367// ----end of grammar----
4368
4369// Local Variables: //
4370// mode: c++ //
4371// tab-width: 4 //
4372// compile-command: "bison -Wcounterexamples parser.yy" //
4373// End: //
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