source: src/Parser/parser.yy@ f54e6ec

Last change on this file since f54e6ec was 0ac8d07, checked in by Peter A. Buhr <pabuhr@…>, 2 years ago

remove empty rule in cfa_abstract_parameter_declaration to remove conflicts
  • Property mode set to 100644
File size: 174.7 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 : Mon Sep 4 18:28:12 2023
13// Update Count : 6393
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 "SynTree/Type.h" // for Type
51#include "DeclarationNode.h" // for DeclarationNode, ...
52#include "ExpressionNode.h" // for ExpressionNode, ...
53#include "InitializerNode.h" // for InitializerNode, ...
54#include "ParserTypes.h"
55#include "StatementNode.h" // for build_...
56#include "TypedefTable.h"
57#include "TypeData.h"
58#include "Common/SemanticError.h" // error_str
59#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
60
61#include "SynTree/Attribute.h" // for Attribute
62
63// lex uses __null in a boolean context, it's fine.
64#ifdef __clang__
65#pragma GCC diagnostic ignored "-Wparentheses-equality"
66#endif
67
68extern DeclarationNode * parseTree;
69extern ast::Linkage::Spec linkage;
70extern TypedefTable typedefTable;
71
72stack<ast::Linkage::Spec> linkageStack;
73
74bool appendStr( string & to, string & from ) {
75 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
76 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
77 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
78 // easier to let the C compiler handle this case.
79 //
80 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
81 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
82 // e.g., u"a" U"b" L"c" is disallowed.
83
84 if ( from[0] != '"' ) { // encoding ?
85 if ( to[0] != '"' ) { // encoding ?
86 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
87 yyerror( "non-matching string encodings for string-literal concatenation" );
88 return false; // parse error, must call YYERROR in action
89 } else if ( from[1] == '8' ) {
90 from.erase( 0, 1 ); // remove 2nd encoding
91 } // if
92 } else {
93 if ( from[1] == '8' ) { // move encoding to start
94 to = "u8" + to;
95 from.erase( 0, 1 ); // remove 2nd encoding
96 } else {
97 to = from[0] + to;
98 } // if
99 } // if
100 from.erase( 0, 1 ); // remove 2nd encoding
101 } // if
102 to += " " + from; // concatenated into single string
103 return true;
104} // appendStr
105
106DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
107 // distribute declaration_specifier across all declared variables, e.g., static, const, but not __attribute__.
108 assert( declList );
109 // printf( "distAttr1 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout );
110 DeclarationNode * cl = (new DeclarationNode)->addType( typeSpec );
111 // printf( "distAttr2 cl %p\n", cl ); cl->type->print( std::cout );
112 // cl->type->aggregate.name = cl->type->aggInst.aggregate->aggregate.name;
113
114 for ( DeclarationNode * cur = dynamic_cast<DeclarationNode *>( declList->get_next() ); cur != nullptr; cur = dynamic_cast<DeclarationNode *>( cur->get_next() ) ) {
115 cl->cloneBaseType( cur );
116 } // for
117 declList->addType( cl );
118 // printf( "distAttr3 declList %p\n", declList ); declList->print( std::cout, 0 );
119 return declList;
120} // distAttr
121
122void distExt( DeclarationNode * declaration ) {
123 // distribute EXTENSION across all declarations
124 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
125 iter->set_extension( true );
126 } // for
127} // distExt
128
129void distInl( DeclarationNode * declaration ) {
130 // distribute INLINE across all declarations
131 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
132 iter->set_inLine( true );
133 } // for
134} // distInl
135
136void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
137 // distribute qualifiers across all non-variable declarations in a distribution statemement
138 for ( DeclarationNode * iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
139 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
140 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
141 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
142 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
143 DeclarationNode * clone = qualifiers->clone();
144 if ( qualifiers->type ) { // forall clause ? (handles SC)
145 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
146 swap( clone->type->forall, iter->type->aggregate.params );
147 iter->addQualifiers( clone );
148 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
149 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
150 DeclarationNode newnode;
151 swap( newnode.type, iter->type->aggInst.aggregate );
152 swap( clone->type->forall, newnode.type->aggregate.params );
153 newnode.addQualifiers( clone );
154 swap( newnode.type, iter->type->aggInst.aggregate );
155 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
156 swap( clone->type->forall, iter->type->forall );
157 iter->addQualifiers( clone );
158 } // if
159 } else { // just SC qualifiers
160 iter->addQualifiers( clone );
161 } // if
162 } // for
163 delete qualifiers;
164} // distQual
165
166// There is an ambiguity for inline generic-routine return-types and generic routines.
167// forall( otype T ) struct S { int i; } bar( T ) {}
168// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
169// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
170// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
171// forall( otype T ) struct S { int T; };
172// forall( otype W ) bar( W ) {}
173
174void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
175 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
176 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
177 declSpec->type->aggregate.params = nullptr;
178 } // if
179} // rebindForall
180
181string * build_postfix_name( string * name ) {
182 *name = string("__postfix_func_") + *name;
183 return name;
184} // build_postfix_name
185
186DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
187 if ( ! fieldList ) { // field declarator ?
188 if ( ! ( typeSpec->type && (typeSpec->type->kind == TypeData::Aggregate || typeSpec->type->kind == TypeData::Enum) ) ) {
189 stringstream ss;
190 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
191 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
192 return nullptr;
193 } // if
194 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
195 fieldList = DeclarationNode::newName( nullptr );
196 } // if
197// return distAttr( typeSpec, fieldList ); // mark all fields in list
198
199 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
200 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
201 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
202 return temp;
203} // fieldDecl
204
205#define NEW_ZERO new ExpressionNode( build_constantInteger( yylloc, *new string( "0" ) ) )
206#define NEW_ONE new ExpressionNode( build_constantInteger( yylloc, *new string( "1" ) ) )
207#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
208#define MISSING_ANON_FIELD "syntax error, missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
209#define MISSING_LOW "syntax error, missing low value for up-to range so index is uninitialized."
210#define MISSING_HIGH "syntax error, missing high value for down-to range so index is uninitialized."
211
212static ForCtrl * makeForCtrl(
213 const CodeLocation & location,
214 DeclarationNode * init,
215 enum OperKinds compop,
216 ExpressionNode * comp,
217 ExpressionNode * inc ) {
218 // Wrap both comp/inc if they are non-null.
219 if ( comp ) comp = new ExpressionNode( build_binary_val( location,
220 compop,
221 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
222 comp ) );
223 if ( inc ) inc = new ExpressionNode( build_binary_val( location,
224 // choose += or -= for upto/downto
225 compop == OperKinds::LThan || compop == OperKinds::LEThan ? OperKinds::PlusAssn : OperKinds::MinusAssn,
226 new ExpressionNode( build_varref( location, new string( *init->name ) ) ),
227 inc ) );
228 // The StatementNode call frees init->name, it must happen later.
229 return new ForCtrl( new StatementNode( init ), comp, inc );
230}
231
232ForCtrl * forCtrl( const CodeLocation & location, DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
233 if ( index->initializer ) {
234 SemanticError( yylloc, "syntax error, direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
235 } // if
236 if ( index->next ) {
237 SemanticError( yylloc, "syntax error, multiple loop indexes disallowed in for-loop declaration." );
238 } // if
239 DeclarationNode * initDecl = index->addInitializer( new InitializerNode( start ) );
240 return makeForCtrl( location, initDecl, compop, comp, inc );
241} // forCtrl
242
243ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
244 ast::ConstantExpr * constant = dynamic_cast<ast::ConstantExpr *>(type->expr.get());
245 if ( constant && (constant->rep == "0" || constant->rep == "1") ) {
246 type = new ExpressionNode( new ast::CastExpr( location, maybeMoveBuild(type), new ast::BasicType( ast::BasicType::SignedInt ) ) );
247 } // if
248 DeclarationNode * initDecl = distAttr(
249 DeclarationNode::newTypeof( type, true ),
250 DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) )
251 );
252 return makeForCtrl( location, initDecl, compop, comp, inc );
253} // forCtrl
254
255ForCtrl * forCtrl( const CodeLocation & location, ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
256 if ( auto identifier = dynamic_cast<ast::NameExpr *>(index->expr.get()) ) {
257 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
258 } else if ( auto commaExpr = dynamic_cast<ast::CommaExpr *>( index->expr.get() ) ) {
259 if ( auto identifier = commaExpr->arg1.as<ast::NameExpr>() ) {
260 return forCtrl( location, type, new string( identifier->name ), start, compop, comp, inc );
261 } else {
262 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed." ); return nullptr;
263 } // if
264 } else {
265 SemanticError( yylloc, "syntax error, loop-index name missing. Expression disallowed. ." ); return nullptr;
266 } // if
267} // forCtrl
268
269static void IdentifierBeforeIdentifier( string & identifier1, string & identifier2, const char * kind ) {
270 SemanticError( yylloc, ::toString( "syntax error, adjacent identifiers \"", identifier1, "\" and \"", identifier2, "\" are not meaningful in a", kind, ".\n"
271 "Possible cause is misspelled type name or missing generic parameter." ) );
272} // IdentifierBeforeIdentifier
273
274static void IdentifierBeforeType( string & identifier, const char * kind ) {
275 SemanticError( yylloc, ::toString( "syntax error, identifier \"", identifier, "\" cannot appear before a ", kind, ".\n"
276 "Possible cause is misspelled storage/CV qualifier, misspelled typename, or missing generic parameter." ) );
277} // IdentifierBeforeType
278
279bool forall = false; // aggregate have one or more forall qualifiers ?
280
281// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
282#define YYLLOC_DEFAULT(Cur, Rhs, N) \
283if ( N ) { \
284 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
285 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
286 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
287 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
288 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
289} else { \
290 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
291 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
292 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
293}
294%}
295
296%define parse.error verbose
297
298// Types declaration for productions
299
300%union {
301 Token tok;
302 ExpressionNode * expr;
303 DeclarationNode * decl;
304 ast::AggregateDecl::Aggregate aggKey;
305 ast::TypeDecl::Kind tclass;
306 StatementNode * stmt;
307 ClauseNode * clause;
308 ast::WaitForStmt * wfs;
309 ast::WaitUntilStmt::ClauseNode * wucn;
310 CondCtl * ifctl;
311 ForCtrl * forctl;
312 LabelNode * labels;
313 InitializerNode * init;
314 OperKinds oper;
315 std::string * str;
316 bool is_volatile;
317 EnumHiding enum_hiding;
318 ast::ExceptionKind except_kind;
319 ast::GenericExpr * genexpr;
320}
321
322// ************************ TERMINAL TOKENS ********************************
323
324// keywords
325%token TYPEDEF
326%token EXTERN STATIC AUTO REGISTER
327%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
328%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
329%token NORETURN // C11
330%token CONST VOLATILE
331%token RESTRICT // C99
332%token ATOMIC // C11
333%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
334%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
335%token BOOL COMPLEX IMAGINARY // C99
336%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
337%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
338%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
339%token ZERO_T ONE_T // CFA
340%token SIZEOF TYPEOF VA_LIST VA_ARG AUTO_TYPE // GCC
341%token OFFSETOF BASETYPEOF TYPEID // CFA
342%token ENUM STRUCT UNION
343%token EXCEPTION // CFA
344%token GENERATOR COROUTINE MONITOR THREAD // CFA
345%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
346// %token RESUME // CFA
347%token LABEL // GCC
348%token SUSPEND // CFA
349%token ATTRIBUTE EXTENSION // GCC
350%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
351%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR WAITUNTIL // CFA
352%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
353%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
354%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
355
356// names and constants: lexer differentiates between identifier and typedef names
357%token<tok> IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
358%token<tok> TIMEOUT WAND WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
359%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
360%token<tok> DIRECTIVE
361// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
362// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
363// converted into the tuple index (.)(1). e.g., 3.x
364%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
365
366// multi-character operators
367%token ARROW // ->
368%token ICR DECR // ++ --
369%token LS RS // << >>
370%token LE GE EQ NE // <= >= == !=
371%token ANDAND OROR // && ||
372%token ELLIPSIS // ...
373
374%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
375%token PLUSassign MINUSassign // += -=
376%token LSassign RSassign // <<= >>=
377%token ANDassign ERassign ORassign // &= ^= |=
378
379%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
380%token ATassign // @=
381
382%type<tok> identifier identifier_at identifier_or_type_name attr_name
383%type<tok> quasi_keyword
384%type<expr> string_literal
385%type<str> string_literal_list
386
387%type<enum_hiding> hide_opt visible_hide_opt
388
389// expressions
390%type<expr> constant
391%type<expr> tuple tuple_expression_list
392%type<oper> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
393%type<expr> primary_expression postfix_expression unary_expression
394%type<expr> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
395%type<expr> shift_expression relational_expression equality_expression
396%type<expr> AND_expression exclusive_OR_expression inclusive_OR_expression
397%type<expr> logical_AND_expression logical_OR_expression
398%type<expr> conditional_expression constant_expression assignment_expression assignment_expression_opt
399%type<expr> comma_expression comma_expression_opt
400%type<expr> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
401%type<ifctl> conditional_declaration
402%type<forctl> for_control_expression for_control_expression_list
403%type<oper> upupeq updown updowneq downupdowneq
404%type<expr> subrange
405%type<decl> asm_name_opt
406%type<expr> asm_operands_opt asm_operands_list asm_operand
407%type<labels> label_list
408%type<expr> asm_clobbers_list_opt
409%type<is_volatile> asm_volatile_opt
410%type<expr> handler_predicate_opt
411%type<genexpr> generic_association generic_assoc_list
412
413// statements
414%type<stmt> statement labeled_statement compound_statement
415%type<stmt> statement_decl statement_decl_list statement_list_nodecl
416%type<stmt> selection_statement if_statement
417%type<clause> switch_clause_list_opt switch_clause_list
418%type<expr> case_value
419%type<clause> case_clause case_value_list case_label case_label_list
420%type<stmt> iteration_statement jump_statement
421%type<stmt> expression_statement asm_statement
422%type<stmt> with_statement
423%type<expr> with_clause_opt
424%type<stmt> exception_statement
425%type<clause> handler_clause finally_clause
426%type<except_kind> handler_key
427%type<stmt> mutex_statement
428%type<expr> when_clause when_clause_opt waitfor waituntil timeout
429%type<stmt> waitfor_statement waituntil_statement
430%type<wfs> wor_waitfor_clause
431%type<wucn> waituntil_clause wand_waituntil_clause wor_waituntil_clause
432
433// declarations
434%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
435%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
436%type<decl> abstract_parameter_declaration
437
438%type<aggKey> aggregate_key aggregate_data aggregate_control
439%type<decl> aggregate_type aggregate_type_nobody
440
441%type<decl> assertion assertion_list assertion_list_opt
442
443%type<expr> bit_subrange_size_opt bit_subrange_size
444
445%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
446%type<decl> vtable vtable_opt default_opt
447
448%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
449
450%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
451%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
452
453%type<decl> elaborated_type elaborated_type_nobody
454
455%type<decl> enumerator_list enum_type enum_type_nobody
456%type<init> enumerator_value_opt
457
458%type<decl> external_definition external_definition_list external_definition_list_opt
459
460%type<decl> exception_declaration
461
462%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
463%type<expr> field field_name_list field_name fraction_constants_opt
464
465%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
466
467%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
468%type<decl> identifier_list
469
470%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
471%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
472%type<decl> cfa_abstract_ptr cfa_abstract_tuple
473
474%type<decl> cfa_array_parameter_1st_dimension
475
476%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
477%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
478
479%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
480%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
481
482%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
483
484%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
485
486%type<decl> c_declaration static_assert
487%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
488%type<decl> KR_parameter_list KR_parameter_list_opt
489
490%type<decl> parameter_declaration parameter_list parameter_type_list_opt
491
492%type<decl> paren_identifier paren_type
493
494%type<decl> storage_class storage_class_list
495
496%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
497
498%type<tclass> type_class new_type_class
499%type<decl> type_declarator type_declarator_name type_declaring_list
500
501%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
502%type<decl> typedef_name typedef_declaration typedef_expression
503
504%type<decl> variable_type_redeclarator variable_type_ptr variable_type_array variable_type_function
505%type<decl> general_function_declarator function_type_redeclarator function_type_array function_type_no_ptr function_type_ptr
506
507%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
508
509%type<decl> type type_no_function
510%type<decl> type_parameter type_parameter_list type_initializer_opt
511
512%type<expr> type_parameters_opt type_list array_type_list
513
514%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
515%type<decl> type_specifier type_specifier_nobody
516
517%type<decl> variable_declarator variable_ptr variable_array variable_function
518%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
519
520%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
521
522// initializers
523%type<init> initializer initializer_list_opt initializer_opt
524
525// designators
526%type<expr> designator designator_list designation
527
528
529// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
530// .---------. matches IF '(' comma_expression ')' statement . (reduce)
531// if ( C ) S1 else S2
532// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
533// Similar issues exit with the waitfor statement.
534
535// Order of these lines matters (low-to-high precedence). THEN is left associative over WAND/WOR/TIMEOUT/ELSE, WAND/WOR
536// is left associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
537%precedence THEN // rule precedence for IF/WAITFOR statement
538%precedence ANDAND // token precedence for start of WAND in WAITFOR statement
539%precedence WAND // token precedence for start of WAND in WAITFOR statement
540%precedence OROR // token precedence for start of WOR in WAITFOR statement
541%precedence WOR // token precedence for start of WOR in WAITFOR statement
542%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
543%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
544%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
545%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
546%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
547%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
548%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
549
550
551// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
552// forall( otype T ) struct Foo { T v; };
553// .-----. matches pointer to function returning a generic (which is impossible without a type)
554// Foo ( *fp )( int );
555// `---' matches start of TYPEGENname '('
556// must be:
557// Foo( int ) ( *fp )( int );
558// The same problem occurs here:
559// forall( otype T ) struct Foo { T v; } ( *fp )( int );
560// must be:
561// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
562
563// Order of these lines matters (low-to-high precedence).
564%precedence TYPEGENname
565%precedence '}'
566%precedence '('
567
568// %precedence RESUME
569// %precedence '{'
570// %precedence ')'
571
572%locations // support location tracking for error messages
573
574%start translation_unit // parse-tree root
575
576%%
577// ************************ Namespace Management ********************************
578
579// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
580// which are lexically identical.
581//
582// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
583// foo f; // to allow it to appear in this context
584//
585// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
586// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
587// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
588// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
589// must be distinguished by the lexical scanner.
590//
591// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
592// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
593// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
594// each context that introduces a name scope, a new level is created in the type table and that level is popped on
595// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
596// This requires distinguishing between type names that are local to the current declaration scope and those that
597// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
598//
599// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
600// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
601// around the list separator.
602//
603// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
604// push pop push pop
605
606push:
607 { typedefTable.enterScope(); }
608 ;
609
610pop:
611 { typedefTable.leaveScope(); }
612 ;
613
614// ************************ CONSTANTS ********************************
615
616constant:
617 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
618 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( yylloc, *$1 ) ); }
619 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
620 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
621 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( yylloc, *$1 ) ); }
622 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( yylloc, *$1 ) ); }
623 ;
624
625quasi_keyword: // CFA
626 TIMEOUT
627 | WAND
628 | WOR
629 | CATCH
630 | RECOVER
631 | CATCHRESUME
632 | FIXUP
633 | FINALLY
634 ;
635
636identifier:
637 IDENTIFIER
638 | quasi_keyword
639 ;
640
641identifier_at:
642 identifier
643 | '@' // CFA
644 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
645 ;
646
647string_literal:
648 string_literal_list { $$ = new ExpressionNode( build_constantStr( yylloc, *$1 ) ); }
649 ;
650
651string_literal_list: // juxtaposed strings are concatenated
652 STRINGliteral { $$ = $1; } // conversion from tok to str
653 | string_literal_list STRINGliteral
654 {
655 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
656 delete $2; // allocated by lexer
657 $$ = $1; // conversion from tok to str
658 }
659 ;
660
661// ************************ EXPRESSIONS ********************************
662
663primary_expression:
664 IDENTIFIER // typedef name cannot be used as a variable name
665 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
666 | quasi_keyword
667 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
668 | TYPEDIMname // CFA, generic length argument
669 // { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( DeclarationNode::newFromTypedef( $1 ) ) ) ); }
670 // { $$ = new ExpressionNode( build_varref( $1 ) ); }
671 { $$ = new ExpressionNode( build_dimensionref( yylloc, $1 ) ); }
672 | tuple
673 | '(' comma_expression ')'
674 { $$ = $2; }
675 | '(' compound_statement ')' // GCC, lambda expression
676 { $$ = new ExpressionNode( new ast::StmtExpr( yylloc, dynamic_cast<ast::CompoundStmt *>( maybeMoveBuild( $2 ) ) ) ); }
677 | type_name '.' identifier // CFA, nested type
678 { $$ = new ExpressionNode( build_qualified_expr( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
679 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
680 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
681 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
682 {
683 // add the missing control expression to the GenericExpr and return it
684 $5->control = maybeMoveBuild( $3 );
685 $$ = new ExpressionNode( $5 );
686 }
687 // | RESUME '(' comma_expression ')'
688 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
689 // | RESUME '(' comma_expression ')' compound_statement
690 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
691 | IDENTIFIER IDENTIFIER // invalid syntax rule
692 { IdentifierBeforeIdentifier( *$1.str, *$2.str, "n expression" ); $$ = nullptr; }
693 | IDENTIFIER type_qualifier // invalid syntax rule
694 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
695 | IDENTIFIER storage_class // invalid syntax rule
696 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
697 | IDENTIFIER basic_type_name // invalid syntax rule
698 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
699 | IDENTIFIER TYPEDEFname // invalid syntax rule
700 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
701 | IDENTIFIER TYPEGENname // invalid syntax rule
702 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
703 ;
704
705generic_assoc_list: // C11
706 generic_association
707 | generic_assoc_list ',' generic_association
708 {
709 // steal the association node from the singleton and delete the wrapper
710 assert( 1 == $3->associations.size() );
711 $1->associations.push_back( $3->associations.front() );
712 delete $3;
713 $$ = $1;
714 }
715 ;
716
717generic_association: // C11
718 type_no_function ':' assignment_expression
719 {
720 // create a GenericExpr wrapper with one association pair
721 $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuildType( $1 ), maybeMoveBuild( $3 ) } } );
722 }
723 | DEFAULT ':' assignment_expression
724 { $$ = new ast::GenericExpr( yylloc, nullptr, { { maybeMoveBuild( $3 ) } } ); }
725 ;
726
727postfix_expression:
728 primary_expression
729 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
730 // Historic, transitional: Disallow commas in subscripts.
731 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
732 // Current: Commas in subscripts make tuples.
733 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)($3->set_last( $5 ) ) )) ) ); }
734 | postfix_expression '[' assignment_expression ']'
735 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
736 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
737 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
738 // equivalent to the old x[i,j].
739 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
740 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
741 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
742 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
743 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Index, $1, $3 ) ); }
744 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
745 {
746 Token fn;
747 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
748 $$ = new ExpressionNode( new ast::ConstructorExpr( yylloc, build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
749 }
750 | postfix_expression '(' argument_expression_list_opt ')'
751 { $$ = new ExpressionNode( build_func( yylloc, $1, $3 ) ); }
752 | VA_ARG '(' primary_expression ',' declaration_specifier_nobody abstract_parameter_declarator_opt ')'
753 // { SemanticError( yylloc, "va_arg is currently unimplemented." ); $$ = nullptr; }
754 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, new string( "__builtin_va_arg") ) ),
755 (ExpressionNode *)($3->set_last( (ExpressionNode *)($6 ? $6->addType( $5 ) : $5) )) ) ); }
756 | postfix_expression '`' identifier // CFA, postfix call
757 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
758 | constant '`' identifier // CFA, postfix call
759 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
760 | string_literal '`' identifier // CFA, postfix call
761 { $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, build_postfix_name( $3 ) ) ), $1 ) ); }
762 | postfix_expression '.' identifier
763 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
764 | postfix_expression '.' INTEGERconstant // CFA, tuple index
765 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
766 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
767 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 ) ) ); }
768 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
769 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
770 | postfix_expression '.' aggregate_control
771 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $3, $1 ) ); }
772 | postfix_expression ARROW identifier
773 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_varref( yylloc, $3 ) ) ); }
774 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
775 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_constantInteger( yylloc, *$3 ) ) ); }
776 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
777 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
778 | postfix_expression ICR
779 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::IncrPost, $1 ) ); }
780 | postfix_expression DECR
781 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::DecrPost, $1 ) ); }
782 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
783 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, new InitializerNode( $5, true ) ) ); }
784 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
785 { $$ = new ExpressionNode( build_compoundLiteral( yylloc, $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
786 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
787 {
788 Token fn;
789 fn.str = new string( "^?{}" ); // location undefined
790 $$ = new ExpressionNode( build_func( yylloc, new ExpressionNode( build_varref( yylloc, fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
791 }
792 ;
793
794argument_expression_list_opt:
795 // empty
796 { $$ = nullptr; }
797 | argument_expression_list
798 ;
799
800argument_expression_list:
801 argument_expression
802 | argument_expression_list_opt ',' argument_expression
803 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
804 ;
805
806argument_expression:
807 '@' // CFA, default parameter
808 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
809 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
810 | assignment_expression
811 ;
812
813field_name_list: // CFA, tuple field selector
814 field
815 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
816 ;
817
818field: // CFA, tuple field selector
819 field_name
820 | FLOATING_DECIMALconstant field
821 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), maybeMoveBuild( $2 ) ) ); }
822 | FLOATING_DECIMALconstant '[' field_name_list ']'
823 { $$ = new ExpressionNode( build_fieldSel( yylloc, new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( yylloc, *$1 ) ), build_tuple( yylloc, $3 ) ) ); }
824 | field_name '.' field
825 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
826 | field_name '.' '[' field_name_list ']'
827 { $$ = new ExpressionNode( build_fieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
828 | field_name ARROW field
829 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, maybeMoveBuild( $3 ) ) ); }
830 | field_name ARROW '[' field_name_list ']'
831 { $$ = new ExpressionNode( build_pfieldSel( yylloc, $1, build_tuple( yylloc, $4 ) ) ); }
832 ;
833
834field_name:
835 INTEGERconstant fraction_constants_opt
836 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_constantInteger( yylloc, *$1 ), $2 ) ); }
837 | FLOATINGconstant fraction_constants_opt
838 { $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_field_name_FLOATINGconstant( yylloc, *$1 ), $2 ) ); }
839 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
840 {
841 $$ = new ExpressionNode( build_field_name_fraction_constants( yylloc, build_varref( yylloc, $1 ), $2 ) );
842 }
843 ;
844
845fraction_constants_opt:
846 // empty
847 { $$ = nullptr; }
848 | fraction_constants_opt FLOATING_FRACTIONconstant
849 {
850 ast::Expr * constant = build_field_name_FLOATING_FRACTIONconstant( yylloc, *$2 );
851 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( yylloc, $1, constant ) ) : new ExpressionNode( constant );
852 }
853 ;
854
855unary_expression:
856 postfix_expression
857 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
858 // semantics checks, e.g., ++3, 3--, *3, &&3
859 | constant
860 | string_literal
861 { $$ = $1; }
862 | EXTENSION cast_expression // GCC
863 { $$ = $2->set_extension( true ); }
864 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
865 // { * X; } // dereference X
866 // { * int X; } // CFA declaration of pointer to int
867 | ptrref_operator cast_expression // CFA
868 {
869 switch ( $1 ) {
870 case OperKinds::AddressOf:
871 $$ = new ExpressionNode( new ast::AddressExpr( maybeMoveBuild( $2 ) ) );
872 break;
873 case OperKinds::PointTo:
874 $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) );
875 break;
876 case OperKinds::And:
877 $$ = new ExpressionNode( new ast::AddressExpr( new ast::AddressExpr( maybeMoveBuild( $2 ) ) ) );
878 break;
879 default:
880 assert( false );
881 }
882 }
883 | unary_operator cast_expression
884 { $$ = new ExpressionNode( build_unary_val( yylloc, $1, $2 ) ); }
885 | ICR unary_expression
886 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Incr, $2 ) ); }
887 | DECR unary_expression
888 { $$ = new ExpressionNode( build_unary_val( yylloc, OperKinds::Decr, $2 ) ); }
889 | SIZEOF unary_expression
890 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
891 | SIZEOF '(' type_no_function ')'
892 { $$ = new ExpressionNode( new ast::SizeofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
893 | ALIGNOF unary_expression // GCC, variable alignment
894 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuild( $2 ) ) ); }
895 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
896 { $$ = new ExpressionNode( new ast::AlignofExpr( yylloc, maybeMoveBuildType( $3 ) ) ); }
897 | OFFSETOF '(' type_no_function ',' identifier ')'
898 { $$ = new ExpressionNode( build_offsetOf( yylloc, $3, build_varref( yylloc, $5 ) ) ); }
899 | TYPEID '(' type_no_function ')'
900 {
901 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
902 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
903 }
904 ;
905
906ptrref_operator:
907 '*' { $$ = OperKinds::PointTo; }
908 | '&' { $$ = OperKinds::AddressOf; }
909 // GCC, address of label must be handled by semantic check for ref,ref,label
910 | ANDAND { $$ = OperKinds::And; }
911 ;
912
913unary_operator:
914 '+' { $$ = OperKinds::UnPlus; }
915 | '-' { $$ = OperKinds::UnMinus; }
916 | '!' { $$ = OperKinds::Neg; }
917 | '~' { $$ = OperKinds::BitNeg; }
918 ;
919
920cast_expression:
921 unary_expression
922 | '(' type_no_function ')' cast_expression
923 { $$ = new ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
924 | '(' aggregate_control '&' ')' cast_expression // CFA
925 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
926 | '(' aggregate_control '*' ')' cast_expression // CFA
927 { $$ = new ExpressionNode( build_keyword_cast( yylloc, $2, $5 ) ); }
928 | '(' VIRTUAL ')' cast_expression // CFA
929 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $4 ), maybeMoveBuildType( nullptr ) ) ); }
930 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
931 { $$ = new ExpressionNode( new ast::VirtualCastExpr( yylloc, maybeMoveBuild( $5 ), maybeMoveBuildType( $3 ) ) ); }
932 | '(' RETURN type_no_function ')' cast_expression // CFA
933 { $$ = new ExpressionNode( build_cast( yylloc, $3, $5, ast::CastExpr::Return ) ); }
934 | '(' COERCE type_no_function ')' cast_expression // CFA
935 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
936 | '(' qualifier_cast_list ')' cast_expression // CFA
937 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
938// | '(' type_no_function ')' tuple
939// { $$ = new ast::ExpressionNode( build_cast( yylloc, $2, $4 ) ); }
940 ;
941
942qualifier_cast_list:
943 cast_modifier type_qualifier_name
944 | cast_modifier MUTEX
945 | qualifier_cast_list cast_modifier type_qualifier_name
946 | qualifier_cast_list cast_modifier MUTEX
947 ;
948
949cast_modifier:
950 '-'
951 | '+'
952 ;
953
954exponential_expression:
955 cast_expression
956 | exponential_expression '\\' cast_expression
957 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Exp, $1, $3 ) ); }
958 ;
959
960multiplicative_expression:
961 exponential_expression
962 | multiplicative_expression '*' exponential_expression
963 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mul, $1, $3 ) ); }
964 | multiplicative_expression '/' exponential_expression
965 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Div, $1, $3 ) ); }
966 | multiplicative_expression '%' exponential_expression
967 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Mod, $1, $3 ) ); }
968 ;
969
970additive_expression:
971 multiplicative_expression
972 | additive_expression '+' multiplicative_expression
973 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Plus, $1, $3 ) ); }
974 | additive_expression '-' multiplicative_expression
975 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Minus, $1, $3 ) ); }
976 ;
977
978shift_expression:
979 additive_expression
980 | shift_expression LS additive_expression
981 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LShift, $1, $3 ) ); }
982 | shift_expression RS additive_expression
983 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::RShift, $1, $3 ) ); }
984 ;
985
986relational_expression:
987 shift_expression
988 | relational_expression '<' shift_expression
989 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LThan, $1, $3 ) ); }
990 | relational_expression '>' shift_expression
991 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GThan, $1, $3 ) ); }
992 | relational_expression LE shift_expression
993 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::LEThan, $1, $3 ) ); }
994 | relational_expression GE shift_expression
995 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::GEThan, $1, $3 ) ); }
996 ;
997
998equality_expression:
999 relational_expression
1000 | equality_expression EQ relational_expression
1001 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Eq, $1, $3 ) ); }
1002 | equality_expression NE relational_expression
1003 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Neq, $1, $3 ) ); }
1004 ;
1005
1006AND_expression:
1007 equality_expression
1008 | AND_expression '&' equality_expression
1009 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitAnd, $1, $3 ) ); }
1010 ;
1011
1012exclusive_OR_expression:
1013 AND_expression
1014 | exclusive_OR_expression '^' AND_expression
1015 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::Xor, $1, $3 ) ); }
1016 ;
1017
1018inclusive_OR_expression:
1019 exclusive_OR_expression
1020 | inclusive_OR_expression '|' exclusive_OR_expression
1021 { $$ = new ExpressionNode( build_binary_val( yylloc, OperKinds::BitOr, $1, $3 ) ); }
1022 ;
1023
1024logical_AND_expression:
1025 inclusive_OR_expression
1026 | logical_AND_expression ANDAND inclusive_OR_expression
1027 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::AndExpr ) ); }
1028 ;
1029
1030logical_OR_expression:
1031 logical_AND_expression
1032 | logical_OR_expression OROR logical_AND_expression
1033 { $$ = new ExpressionNode( build_and_or( yylloc, $1, $3, ast::OrExpr ) ); }
1034 ;
1035
1036conditional_expression:
1037 logical_OR_expression
1038 | logical_OR_expression '?' comma_expression ':' conditional_expression
1039 { $$ = new ExpressionNode( build_cond( yylloc, $1, $3, $5 ) ); }
1040 // FIX ME: computes $1 twice
1041 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1042 { $$ = new ExpressionNode( build_cond( yylloc, $1, $1->clone(), $4 ) ); }
1043 ;
1044
1045constant_expression:
1046 conditional_expression
1047 ;
1048
1049assignment_expression:
1050 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1051 conditional_expression
1052 | unary_expression assignment_operator assignment_expression
1053 {
1054// if ( $2 == OperKinds::AtAssn ) {
1055// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1056// } else {
1057 $$ = new ExpressionNode( build_binary_val( yylloc, $2, $1, $3 ) );
1058// } // if
1059 }
1060 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1061 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1062 ;
1063
1064assignment_expression_opt:
1065 // empty
1066 { $$ = nullptr; }
1067 | assignment_expression
1068 ;
1069
1070assignment_operator:
1071 simple_assignment_operator
1072 | compound_assignment_operator
1073 ;
1074
1075simple_assignment_operator:
1076 '=' { $$ = OperKinds::Assign; }
1077 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1078 ;
1079
1080compound_assignment_operator:
1081 EXPassign { $$ = OperKinds::ExpAssn; }
1082 | MULTassign { $$ = OperKinds::MulAssn; }
1083 | DIVassign { $$ = OperKinds::DivAssn; }
1084 | MODassign { $$ = OperKinds::ModAssn; }
1085 | PLUSassign { $$ = OperKinds::PlusAssn; }
1086 | MINUSassign { $$ = OperKinds::MinusAssn; }
1087 | LSassign { $$ = OperKinds::LSAssn; }
1088 | RSassign { $$ = OperKinds::RSAssn; }
1089 | ANDassign { $$ = OperKinds::AndAssn; }
1090 | ERassign { $$ = OperKinds::ERAssn; }
1091 | ORassign { $$ = OperKinds::OrAssn; }
1092 ;
1093
1094tuple: // CFA, tuple
1095 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1096 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1097// '[' ']'
1098// { $$ = new ExpressionNode( build_tuple() ); }
1099// | '[' push assignment_expression pop ']'
1100// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1101 '[' ',' tuple_expression_list ']'
1102 { $$ = new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
1103 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1104 { $$ = new ExpressionNode( build_tuple( yylloc, (ExpressionNode *)($3->set_last( $6 ) ) )); }
1105 ;
1106
1107tuple_expression_list:
1108 assignment_expression
1109 | '@' // CFA
1110 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1111 | tuple_expression_list ',' assignment_expression
1112 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1113 | tuple_expression_list ',' '@'
1114 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1115 ;
1116
1117comma_expression:
1118 assignment_expression
1119 | comma_expression ',' assignment_expression
1120 { $$ = new ExpressionNode( new ast::CommaExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1121 ;
1122
1123comma_expression_opt:
1124 // empty
1125 { $$ = nullptr; }
1126 | comma_expression
1127 ;
1128
1129// ************************** STATEMENTS *******************************
1130
1131statement:
1132 labeled_statement
1133 | compound_statement
1134 | expression_statement
1135 | selection_statement
1136 | iteration_statement
1137 | jump_statement
1138 | with_statement
1139 | mutex_statement
1140 | waitfor_statement
1141 | waituntil_statement
1142 | exception_statement
1143 | enable_disable_statement
1144 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1145 | asm_statement
1146 | DIRECTIVE
1147 { $$ = new StatementNode( build_directive( yylloc, $1 ) ); }
1148 ;
1149
1150labeled_statement:
1151 // labels cannot be identifiers 0 or 1
1152 identifier_or_type_name ':' attribute_list_opt statement
1153 { $$ = $4->add_label( yylloc, $1, $3 ); }
1154 | identifier_or_type_name ':' attribute_list_opt error // invalid syntax rule
1155 {
1156 SemanticError( yylloc, ::toString( "syntx error, label \"", *$1.str, "\" must be associated with a statement, "
1157 "where a declaration, case, or default is not a statement. "
1158 "Move the label or terminate with a semi-colon." ) );
1159 $$ = nullptr;
1160 }
1161 ;
1162
1163compound_statement:
1164 '{' '}'
1165 { $$ = new StatementNode( build_compound( yylloc, (StatementNode *)0 ) ); }
1166 | '{' push
1167 local_label_declaration_opt // GCC, local labels appear at start of block
1168 statement_decl_list // C99, intermix declarations and statements
1169 pop '}'
1170 { $$ = new StatementNode( build_compound( yylloc, $4 ) ); }
1171 ;
1172
1173statement_decl_list: // C99
1174 statement_decl
1175 | statement_decl_list statement_decl
1176 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1177 ;
1178
1179statement_decl:
1180 declaration // CFA, new & old style declarations
1181 { $$ = new StatementNode( $1 ); }
1182 | EXTENSION declaration // GCC
1183 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1184 | function_definition
1185 { $$ = new StatementNode( $1 ); }
1186 | EXTENSION function_definition // GCC
1187 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1188 | statement
1189 ;
1190
1191statement_list_nodecl:
1192 statement
1193 | statement_list_nodecl statement
1194 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1195 | statement_list_nodecl error // invalid syntax rule
1196 { SemanticError( yylloc, "syntax error, declarations only allowed at the start of the switch body, i.e., after the '{'." ); $$ = nullptr; }
1197 ;
1198
1199expression_statement:
1200 comma_expression_opt ';'
1201 { $$ = new StatementNode( build_expr( yylloc, $1 ) ); }
1202 ;
1203
1204selection_statement:
1205 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
1206 // the inherent S/R conflict with THEN/ELSE.
1207 push if_statement pop
1208 { $$ = $2; }
1209 | SWITCH '(' comma_expression ')' case_clause
1210 { $$ = new StatementNode( build_switch( yylloc, true, $3, $5 ) ); }
1211 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1212 {
1213 StatementNode *sw = new StatementNode( build_switch( yylloc, true, $3, $8 ) );
1214 // The semantics of the declaration list is changed to include associated initialization, which is performed
1215 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1216 // statement around the switch. Statements after the initial declaration list can never be executed, and
1217 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1218 // statement.
1219 $$ = $7 ? new StatementNode( build_compound( yylloc, (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1220 }
1221 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule error
1222 { SemanticError( yylloc, "synatx error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1223 | CHOOSE '(' comma_expression ')' case_clause // CFA
1224 { $$ = new StatementNode( build_switch( yylloc, false, $3, $5 ) ); }
1225 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1226 {
1227 StatementNode *sw = new StatementNode( build_switch( yylloc, false, $3, $8 ) );
1228 $$ = $7 ? new StatementNode( build_compound( yylloc, (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1229 }
1230 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, invalid syntax rule
1231 { SemanticError( yylloc, "syntax error, declarations can only appear before the list of case clauses." ); $$ = nullptr; }
1232 ;
1233
1234if_statement:
1235 IF '(' conditional_declaration ')' statement %prec THEN
1236 // explicitly deal with the shift/reduce conflict on if/else
1237 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), nullptr ) ); }
1238 | IF '(' conditional_declaration ')' statement ELSE statement
1239 { $$ = new StatementNode( build_if( yylloc, $3, maybe_build_compound( yylloc, $5 ), maybe_build_compound( yylloc, $7 ) ) ); }
1240 ;
1241
1242conditional_declaration:
1243 comma_expression
1244 { $$ = new CondCtl( nullptr, $1 ); }
1245 | c_declaration // no semi-colon
1246 { $$ = new CondCtl( $1, nullptr ); }
1247 | cfa_declaration // no semi-colon
1248 { $$ = new CondCtl( $1, nullptr ); }
1249 | declaration comma_expression // semi-colon separated
1250 { $$ = new CondCtl( $1, $2 ); }
1251 ;
1252
1253// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1254// clause allows a list of values and subranges.
1255
1256case_value: // CFA
1257 constant_expression { $$ = $1; }
1258 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1259 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1260 | subrange // CFA, subrange
1261 ;
1262
1263case_value_list: // CFA
1264 case_value { $$ = new ClauseNode( build_case( yylloc, $1 ) ); }
1265 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1266 | case_value_list ',' case_value { $$ = $1->set_last( new ClauseNode( build_case( yylloc, $3 ) ) ); }
1267 ;
1268
1269case_label: // CFA
1270 CASE error // invalid syntax rule
1271 { SemanticError( yylloc, "syntax error, case list missing after case." ); $$ = nullptr; }
1272 | CASE case_value_list ':' { $$ = $2; }
1273 | CASE case_value_list error // invalid syntax rule
1274 { SemanticError( yylloc, "syntax error, colon missing after case list." ); $$ = nullptr; }
1275 | DEFAULT ':' { $$ = new ClauseNode( build_default( yylloc ) ); }
1276 // A semantic check is required to ensure only one default clause per switch/choose statement.
1277 | DEFAULT error // invalid syntax rule
1278 { SemanticError( yylloc, "syntax error, colon missing after default." ); $$ = nullptr; }
1279 ;
1280
1281case_label_list: // CFA
1282 case_label
1283 | case_label_list case_label { $$ = $1->set_last( $2 ); }
1284 ;
1285
1286case_clause: // CFA
1287 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( yylloc, $2 ) ); }
1288 ;
1289
1290switch_clause_list_opt: // CFA
1291 // empty
1292 { $$ = nullptr; }
1293 | switch_clause_list
1294 ;
1295
1296switch_clause_list: // CFA
1297 case_label_list statement_list_nodecl
1298 { $$ = $1->append_last_case( new StatementNode( build_compound( yylloc, $2 ) ) ); }
1299 | switch_clause_list case_label_list statement_list_nodecl
1300 { $$ = $1->set_last( $2->append_last_case( new StatementNode( build_compound( yylloc, $3 ) ) ) ); }
1301 ;
1302
1303iteration_statement:
1304 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1305 { $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) ); }
1306 | WHILE '(' ')' statement ELSE statement // CFA
1307 {
1308 $$ = new StatementNode( build_while( yylloc, new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( yylloc, $4 ) ) );
1309 SemanticWarning( yylloc, Warning::SuperfluousElse );
1310 }
1311 | WHILE '(' conditional_declaration ')' statement %prec THEN
1312 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1313 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1314 { $$ = new StatementNode( build_while( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1315 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1316 { $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) ); }
1317 | DO statement WHILE '(' ')' ELSE statement // CFA
1318 {
1319 $$ = new StatementNode( build_do_while( yylloc, NEW_ONE, maybe_build_compound( yylloc, $2 ) ) );
1320 SemanticWarning( yylloc, Warning::SuperfluousElse );
1321 }
1322 | DO statement WHILE '(' comma_expression ')' ';'
1323 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ) ) ); }
1324 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1325 { $$ = new StatementNode( build_do_while( yylloc, $5, maybe_build_compound( yylloc, $2 ), $8 ) ); }
1326 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1327 { $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) ); }
1328 | FOR '(' ')' statement ELSE statement // CFA
1329 {
1330 $$ = new StatementNode( build_for( yylloc, new ForCtrl( nullptr, nullptr, nullptr ), maybe_build_compound( yylloc, $4 ) ) );
1331 SemanticWarning( yylloc, Warning::SuperfluousElse );
1332 }
1333 | FOR '(' for_control_expression_list ')' statement %prec THEN
1334 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1335 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1336 { $$ = new StatementNode( build_for( yylloc, $3, maybe_build_compound( yylloc, $5 ), $7 ) ); }
1337 ;
1338
1339for_control_expression_list:
1340 for_control_expression
1341 | for_control_expression_list ':' for_control_expression
1342 // ForCtrl + ForCtrl:
1343 // init + init => multiple declaration statements that are hoisted
1344 // condition + condition => (expression) && (expression)
1345 // change + change => (expression), (expression)
1346 {
1347 $1->init->set_last( $3->init );
1348 if ( $1->condition ) {
1349 if ( $3->condition ) {
1350 $1->condition->expr.reset( new ast::LogicalExpr( yylloc, $1->condition->expr.release(), $3->condition->expr.release(), ast::AndExpr ) );
1351 } // if
1352 } else $1->condition = $3->condition;
1353 if ( $1->change ) {
1354 if ( $3->change ) {
1355 $1->change->expr.reset( new ast::CommaExpr( yylloc, $1->change->expr.release(), $3->change->expr.release() ) );
1356 } // if
1357 } else $1->change = $3->change;
1358 $$ = $1;
1359 }
1360 ;
1361
1362for_control_expression:
1363 ';' comma_expression_opt ';' comma_expression_opt
1364 { $$ = new ForCtrl( nullptr, $2, $4 ); }
1365 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1366 {
1367 StatementNode * init = $1 ? new StatementNode( new ast::ExprStmt( yylloc, maybeMoveBuild( $1 ) ) ) : nullptr;
1368 $$ = new ForCtrl( init, $3, $5 );
1369 }
1370 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1371 { $$ = new ForCtrl( new StatementNode( $1 ), $2, $4 ); }
1372
1373 | '@' ';' comma_expression // CFA, empty loop-index
1374 { $$ = new ForCtrl( nullptr, $3, nullptr ); }
1375 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1376 { $$ = new ForCtrl( nullptr, $3, $5 ); }
1377
1378 | comma_expression // CFA, anonymous loop-index
1379 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1380 | downupdowneq comma_expression // CFA, anonymous loop-index
1381 { $$ = forCtrl( yylloc, $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1382
1383 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1384 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1385 | '@' updowneq comma_expression // CFA, anonymous loop-index
1386 {
1387 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1388 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1389 }
1390 | comma_expression updowneq '@' // CFA, anonymous loop-index
1391 {
1392 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1393 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1394 }
1395 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1396 { $$ = forCtrl( yylloc, $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1397 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1398 {
1399 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1400 else $$ = forCtrl( yylloc, $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1401 }
1402 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1403 {
1404 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1405 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1406 }
1407 | comma_expression updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1408 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1409 | '@' updowneq '@' // CFA, invalid syntax rule
1410 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1411 | '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1412 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1413 | comma_expression updowneq '@' '~' '@' // CFA, invalid syntax rule
1414 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1415 | '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1416 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1417
1418 | comma_expression ';' comma_expression // CFA
1419 { $$ = forCtrl( yylloc, $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1420 | comma_expression ';' downupdowneq comma_expression // CFA
1421 { $$ = forCtrl( yylloc, $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1422
1423 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1424 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1425 | comma_expression ';' '@' updowneq comma_expression // CFA
1426 {
1427 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1428 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1429 }
1430 | comma_expression ';' comma_expression updowneq '@' // CFA
1431 {
1432 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1433 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1434 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1435 }
1436 | comma_expression ';' '@' updowneq '@' // CFA, invalid syntax rule
1437 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1438
1439 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1440 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1441 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, invalid syntax rule
1442 {
1443 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1444 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, $7 );
1445 }
1446 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1447 {
1448 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1449 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1450 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, $7 );
1451 }
1452 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1453 { $$ = forCtrl( yylloc, $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1454 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, invalid syntax rule
1455 {
1456 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1457 else $$ = forCtrl( yylloc, $5, $1, $5->clone(), $4, nullptr, nullptr );
1458 }
1459 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1460 {
1461 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1462 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1463 else $$ = forCtrl( yylloc, $3, $1, $3->clone(), $4, nullptr, nullptr );
1464 }
1465 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1466 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1467
1468 | declaration comma_expression // CFA
1469 { $$ = forCtrl( yylloc, $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1470 | declaration downupdowneq comma_expression // CFA
1471 { $$ = forCtrl( yylloc, $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1472
1473 | declaration comma_expression updowneq comma_expression // CFA
1474 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1475 | declaration '@' updowneq comma_expression // CFA
1476 {
1477 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1478 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, NEW_ONE );
1479 }
1480 | declaration comma_expression updowneq '@' // CFA
1481 {
1482 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1483 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1484 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, NEW_ONE );
1485 }
1486
1487 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1488 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1489 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1490 {
1491 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1492 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, $6 );
1493 }
1494 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1495 {
1496 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1497 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1498 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, $6 );
1499 }
1500 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1501 { $$ = forCtrl( yylloc, $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1502 | declaration '@' updowneq comma_expression '~' '@' // CFA
1503 {
1504 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1505 else $$ = forCtrl( yylloc, $1, $4, $3, nullptr, nullptr );
1506 }
1507 | declaration comma_expression updowneq '@' '~' '@' // CFA
1508 {
1509 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1510 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "syntax error, equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1511 else $$ = forCtrl( yylloc, $1, $2, $3, nullptr, nullptr );
1512 }
1513 | declaration '@' updowneq '@' '~' '@' // CFA, invalid syntax rule
1514 { SemanticError( yylloc, "syntax error, missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1515
1516 | comma_expression ';' TYPEDEFname // CFA, array type
1517 {
1518 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1519 //$$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1520 }
1521 | comma_expression ';' downupdowneq TYPEDEFname // CFA, array type
1522 {
1523 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) {
1524 SemanticError( yylloc, "syntax error, all enumeration ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr;
1525 }
1526 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1527 }
1528 ;
1529
1530downupdowneq:
1531 ErangeDown
1532 { $$ = OperKinds::GThan; }
1533 | ErangeUpEq
1534 { $$ = OperKinds::LEThan; }
1535 | ErangeDownEq
1536 { $$ = OperKinds::GEThan; }
1537 ;
1538
1539updown:
1540 '~'
1541 { $$ = OperKinds::LThan; }
1542 | ErangeDown
1543 { $$ = OperKinds::GThan; }
1544 ;
1545
1546updowneq:
1547 updown
1548 | ErangeUpEq
1549 { $$ = OperKinds::LEThan; }
1550 | ErangeDownEq
1551 { $$ = OperKinds::GEThan; }
1552 ;
1553
1554jump_statement:
1555 GOTO identifier_or_type_name ';'
1556 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Goto ) ); }
1557 | GOTO '*' comma_expression ';' // GCC, computed goto
1558 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1559 // whereas normal operator precedence yields goto (*i)+3;
1560 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1561 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1562 | fall_through_name ';' // CFA
1563 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThrough ) ); }
1564 | fall_through_name identifier_or_type_name ';' // CFA
1565 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::FallThrough ) ); }
1566 | fall_through_name DEFAULT ';' // CFA
1567 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::FallThroughDefault ) ); }
1568 | CONTINUE ';'
1569 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1570 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Continue ) ); }
1571 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1572 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1573 // the target of the transfer appears only at the start of an iteration statement.
1574 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Continue ) ); }
1575 | BREAK ';'
1576 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1577 { $$ = new StatementNode( build_branch( yylloc, ast::BranchStmt::Break ) ); }
1578 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1579 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1580 // the target of the transfer appears only at the start of an iteration statement.
1581 { $$ = new StatementNode( build_branch( yylloc, $2, ast::BranchStmt::Break ) ); }
1582 | RETURN comma_expression_opt ';'
1583 { $$ = new StatementNode( build_return( yylloc, $2 ) ); }
1584 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1585 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1586 | SUSPEND ';'
1587 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::None ) ); }
1588 | SUSPEND compound_statement
1589 { $$ = new StatementNode( build_suspend( yylloc, $2, ast::SuspendStmt::None ) ); }
1590 | SUSPEND COROUTINE ';'
1591 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Coroutine ) ); }
1592 | SUSPEND COROUTINE compound_statement
1593 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Coroutine ) ); }
1594 | SUSPEND GENERATOR ';'
1595 { $$ = new StatementNode( build_suspend( yylloc, nullptr, ast::SuspendStmt::Generator ) ); }
1596 | SUSPEND GENERATOR compound_statement
1597 { $$ = new StatementNode( build_suspend( yylloc, $3, ast::SuspendStmt::Generator ) ); }
1598 | THROW assignment_expression_opt ';' // handles rethrow
1599 { $$ = new StatementNode( build_throw( yylloc, $2 ) ); }
1600 | THROWRESUME assignment_expression_opt ';' // handles reresume
1601 { $$ = new StatementNode( build_resume( yylloc, $2 ) ); }
1602 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1603 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1604 ;
1605
1606fall_through_name: // CFA
1607 FALLTHRU
1608 | FALLTHROUGH
1609 ;
1610
1611with_statement:
1612 WITH '(' tuple_expression_list ')' statement
1613 { $$ = new StatementNode( build_with( yylloc, $3, $5 ) ); }
1614 ;
1615
1616// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so possibly change syntax to "with mutex".
1617mutex_statement:
1618 MUTEX '(' argument_expression_list_opt ')' statement
1619 {
1620 if ( ! $3 ) { SemanticError( yylloc, "syntax error, mutex argument list cannot be empty." ); $$ = nullptr; }
1621 $$ = new StatementNode( build_mutex( yylloc, $3, $5 ) );
1622 }
1623 ;
1624
1625when_clause:
1626 WHEN '(' comma_expression ')' { $$ = $3; }
1627 ;
1628
1629when_clause_opt:
1630 // empty
1631 { $$ = nullptr; }
1632 | when_clause
1633 ;
1634
1635cast_expression_list:
1636 cast_expression
1637 | cast_expression_list ',' cast_expression
1638 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1639 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1640 ;
1641
1642timeout:
1643 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1644 ;
1645
1646wor:
1647 OROR
1648 | WOR
1649
1650waitfor:
1651 WAITFOR '(' cast_expression ')'
1652 { $$ = $3; }
1653 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1654 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1655 ;
1656
1657wor_waitfor_clause:
1658 when_clause_opt waitfor statement %prec THEN
1659 // Called first: create header for WaitForStmt.
1660 { $$ = build_waitfor( yylloc, new ast::WaitForStmt( yylloc ), $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1661 | wor_waitfor_clause wor when_clause_opt waitfor statement
1662 { $$ = build_waitfor( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1663 | wor_waitfor_clause wor when_clause_opt ELSE statement
1664 { $$ = build_waitfor_else( yylloc, $1, $3, maybe_build_compound( yylloc, $5 ) ); }
1665 | wor_waitfor_clause wor when_clause_opt timeout statement %prec THEN
1666 { $$ = build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ); }
1667 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1668 | wor_waitfor_clause wor when_clause_opt timeout statement wor ELSE statement // invalid syntax rule
1669 { SemanticError( yylloc, "syntax error, else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1670 | wor_waitfor_clause wor when_clause_opt timeout statement wor when_clause ELSE statement
1671 { $$ = build_waitfor_else( yylloc, build_waitfor_timeout( yylloc, $1, $3, $4, maybe_build_compound( yylloc, $5 ) ), $7, maybe_build_compound( yylloc, $9 ) ); }
1672 ;
1673
1674waitfor_statement:
1675 wor_waitfor_clause %prec THEN
1676 { $$ = new StatementNode( $1 ); }
1677 ;
1678
1679wand:
1680 ANDAND
1681 | WAND
1682 ;
1683
1684waituntil:
1685 WAITUNTIL '(' comma_expression ')'
1686 { $$ = $3; }
1687 ;
1688
1689waituntil_clause:
1690 when_clause_opt waituntil statement
1691 { $$ = build_waituntil_clause( yylloc, $1, $2, maybe_build_compound( yylloc, $3 ) ); }
1692 | '(' wor_waituntil_clause ')'
1693 { $$ = $2; }
1694 ;
1695
1696wand_waituntil_clause:
1697 waituntil_clause %prec THEN
1698 { $$ = $1; }
1699 | waituntil_clause wand wand_waituntil_clause
1700 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::AND, $1, $3 ); }
1701 ;
1702
1703wor_waituntil_clause:
1704 wand_waituntil_clause
1705 { $$ = $1; }
1706 | wor_waituntil_clause wor wand_waituntil_clause
1707 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::OR, $1, $3 ); }
1708 | wor_waituntil_clause wor when_clause_opt ELSE statement
1709 { $$ = new ast::WaitUntilStmt::ClauseNode( ast::WaitUntilStmt::ClauseNode::Op::LEFT_OR, $1, build_waituntil_else( yylloc, $3, maybe_build_compound( yylloc, $5 ) ) ); }
1710 ;
1711
1712waituntil_statement:
1713 wor_waituntil_clause %prec THEN
1714 { $$ = new StatementNode( build_waituntil_stmt( yylloc, $1 ) ); }
1715 ;
1716
1717exception_statement:
1718 TRY compound_statement handler_clause %prec THEN
1719 { $$ = new StatementNode( build_try( yylloc, $2, $3, nullptr ) ); }
1720 | TRY compound_statement finally_clause
1721 { $$ = new StatementNode( build_try( yylloc, $2, nullptr, $3 ) ); }
1722 | TRY compound_statement handler_clause finally_clause
1723 { $$ = new StatementNode( build_try( yylloc, $2, $3, $4 ) ); }
1724 ;
1725
1726handler_clause:
1727 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1728 { $$ = new ClauseNode( build_catch( yylloc, $1, $4, $6, $8 ) ); }
1729 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1730 { $$ = $1->set_last( new ClauseNode( build_catch( yylloc, $2, $5, $7, $9 ) ) ); }
1731 ;
1732
1733handler_predicate_opt:
1734 // empty
1735 { $$ = nullptr; }
1736 | ';' conditional_expression { $$ = $2; }
1737 ;
1738
1739handler_key:
1740 CATCH { $$ = ast::Terminate; }
1741 | RECOVER { $$ = ast::Terminate; }
1742 | CATCHRESUME { $$ = ast::Resume; }
1743 | FIXUP { $$ = ast::Resume; }
1744 ;
1745
1746finally_clause:
1747 FINALLY compound_statement { $$ = new ClauseNode( build_finally( yylloc, $2 ) ); }
1748 ;
1749
1750exception_declaration:
1751 // No SUE declaration in parameter list.
1752 type_specifier_nobody
1753 | type_specifier_nobody declarator
1754 { $$ = $2->addType( $1 ); }
1755 | type_specifier_nobody variable_abstract_declarator
1756 { $$ = $2->addType( $1 ); }
1757 | cfa_abstract_declarator_tuple identifier // CFA
1758 { $$ = $1->addName( $2 ); }
1759 | cfa_abstract_declarator_tuple // CFA
1760 ;
1761
1762enable_disable_statement:
1763 enable_disable_key identifier_list compound_statement
1764 ;
1765
1766enable_disable_key:
1767 ENABLE
1768 | DISABLE
1769 ;
1770
1771asm_statement:
1772 ASM asm_volatile_opt '(' string_literal ')' ';'
1773 { $$ = new StatementNode( build_asm( yylloc, $2, $4, nullptr ) ); }
1774 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1775 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6 ) ); }
1776 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1777 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8 ) ); }
1778 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1779 { $$ = new StatementNode( build_asm( yylloc, $2, $4, $6, $8, $10 ) ); }
1780 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1781 { $$ = new StatementNode( build_asm( yylloc, $2, $5, nullptr, $8, $10, $12 ) ); }
1782 ;
1783
1784asm_volatile_opt: // GCC
1785 // empty
1786 { $$ = false; }
1787 | VOLATILE
1788 { $$ = true; }
1789 ;
1790
1791asm_operands_opt: // GCC
1792 // empty
1793 { $$ = nullptr; } // use default argument
1794 | asm_operands_list
1795 ;
1796
1797asm_operands_list: // GCC
1798 asm_operand
1799 | asm_operands_list ',' asm_operand
1800 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1801 ;
1802
1803asm_operand: // GCC
1804 string_literal '(' constant_expression ')'
1805 { $$ = new ExpressionNode( new ast::AsmExpr( yylloc, "", maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
1806 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1807 {
1808 $$ = new ExpressionNode( new ast::AsmExpr( yylloc, *$2.str, maybeMoveBuild( $4 ), maybeMoveBuild( $6 ) ) );
1809 delete $2.str;
1810 }
1811 ;
1812
1813asm_clobbers_list_opt: // GCC
1814 // empty
1815 { $$ = nullptr; } // use default argument
1816 | string_literal
1817 { $$ = $1; }
1818 | asm_clobbers_list_opt ',' string_literal
1819 { $$ = (ExpressionNode *)( $1->set_last( $3 ) ); }
1820 ;
1821
1822label_list:
1823 identifier
1824 {
1825 $$ = new LabelNode(); $$->labels.emplace_back( yylloc, *$1 );
1826 delete $1; // allocated by lexer
1827 }
1828 | label_list ',' identifier
1829 {
1830 $$ = $1; $1->labels.emplace_back( yylloc, *$3 );
1831 delete $3; // allocated by lexer
1832 }
1833 ;
1834
1835// ****************************** DECLARATIONS *********************************
1836
1837declaration_list_opt: // used at beginning of switch statement
1838 // empty
1839 { $$ = nullptr; }
1840 | declaration_list
1841 ;
1842
1843declaration_list:
1844 declaration
1845 | declaration_list declaration
1846 { $$ = $1->appendList( $2 ); }
1847 ;
1848
1849KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1850 // empty
1851 { $$ = nullptr; }
1852 | KR_parameter_list
1853 ;
1854
1855KR_parameter_list:
1856 c_declaration ';'
1857 { $$ = $1; }
1858 | KR_parameter_list c_declaration ';'
1859 { $$ = $1->appendList( $2 ); }
1860 ;
1861
1862local_label_declaration_opt: // GCC, local label
1863 // empty
1864 | local_label_declaration_list
1865 ;
1866
1867local_label_declaration_list: // GCC, local label
1868 LABEL local_label_list ';'
1869 | local_label_declaration_list LABEL local_label_list ';'
1870 ;
1871
1872local_label_list: // GCC, local label
1873 identifier_or_type_name
1874 | local_label_list ',' identifier_or_type_name
1875 ;
1876
1877declaration: // old & new style declarations
1878 c_declaration ';'
1879 {
1880 // printf( "C_DECLARATION1 %p %s\n", $$, $$->name ? $$->name->c_str() : "(nil)" );
1881 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
1882 // printf( "\tattr %s\n", attr->name.c_str() );
1883 // } // for
1884 }
1885 | cfa_declaration ';' // CFA
1886 | static_assert // C11
1887 ;
1888
1889static_assert:
1890 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1891 { $$ = DeclarationNode::newStaticAssert( $3, maybeMoveBuild( $5 ) ); }
1892 | STATICASSERT '(' constant_expression ')' ';' // CFA
1893 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( yylloc, *new string( "\"\"" ) ) ); }
1894
1895// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1896// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1897// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1898// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1899// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1900// block, but cannot be mixed within a specific declaration.
1901//
1902// CFA C
1903// [10] int x; int x[10]; // array of 10 integers
1904// [10] * char y; char *y[10]; // array of 10 pointers to char
1905
1906cfa_declaration: // CFA
1907 cfa_variable_declaration
1908 | cfa_typedef_declaration
1909 | cfa_function_declaration
1910 | type_declaring_list
1911 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1912 | trait_specifier
1913 ;
1914
1915cfa_variable_declaration: // CFA
1916 cfa_variable_specifier initializer_opt
1917 { $$ = $1->addInitializer( $2 ); }
1918 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1919 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1920 // them as a type_qualifier cannot appear in that context.
1921 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
1922 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1923 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
1924 ;
1925
1926cfa_variable_specifier: // CFA
1927 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1928 // storage-class
1929 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1930 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1931 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1932 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1933 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1934 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
1935 ;
1936
1937cfa_function_declaration: // CFA
1938 cfa_function_specifier
1939 | type_qualifier_list cfa_function_specifier
1940 { $$ = $2->addQualifiers( $1 ); }
1941 | declaration_qualifier_list cfa_function_specifier
1942 { $$ = $2->addQualifiers( $1 ); }
1943 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1944 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
1945 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
1946 {
1947 // Append the return type at the start (left-hand-side) to each identifier in the list.
1948 DeclarationNode * ret = new DeclarationNode;
1949 ret->type = maybeClone( $1->type->base );
1950 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
1951 }
1952 ;
1953
1954cfa_function_specifier: // CFA
1955// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
1956// {
1957// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, nullptr, true );
1958// }
1959// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
1960// {
1961// typedefTable.setNextIdentifier( *$5 );
1962// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, nullptr, true );
1963// }
1964// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
1965// {
1966// typedefTable.setNextIdentifier( *$5 );
1967// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, nullptr, true );
1968// }
1969// | '[' ']' typegen_name
1970 // identifier_or_type_name must be broken apart because of the sequence:
1971 //
1972 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
1973 // '[' ']' type_specifier
1974 //
1975 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1976 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1977 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1978 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1979 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
1980 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1981 { $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
1982 ;
1983
1984cfa_function_return: // CFA
1985 '[' push cfa_parameter_list pop ']'
1986 { $$ = DeclarationNode::newTuple( $3 ); }
1987 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1988 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
1989 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1990 ;
1991
1992cfa_typedef_declaration: // CFA
1993 TYPEDEF cfa_variable_specifier
1994 {
1995 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 1" );
1996 $$ = $2->addTypedef();
1997 }
1998 | TYPEDEF cfa_function_specifier
1999 {
2000 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "cfa_typedef_declaration 2" );
2001 $$ = $2->addTypedef();
2002 }
2003 | cfa_typedef_declaration pop ',' push identifier
2004 {
2005 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "cfa_typedef_declaration 3" );
2006 $$ = $1->appendList( $1->cloneType( $5 ) );
2007 }
2008 ;
2009
2010// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
2011// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
2012
2013typedef_declaration:
2014 TYPEDEF type_specifier declarator
2015 {
2016 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 1" );
2017 if ( $2->type->forall || ($2->type->kind == TypeData::Aggregate && $2->type->aggregate.params) ) {
2018 SemanticError( yylloc, "forall qualifier in typedef is currently unimplemented." ); $$ = nullptr;
2019 } else $$ = $3->addType( $2 )->addTypedef(); // watchout frees $2 and $3
2020 }
2021 | typedef_declaration ',' declarator
2022 {
2023 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "typedef_declaration 2" );
2024 $$ = $1->appendList( $1->cloneBaseType( $3 )->addTypedef() );
2025 }
2026 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
2027 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2028 | type_specifier TYPEDEF declarator
2029 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2030 | type_specifier TYPEDEF type_qualifier_list declarator
2031 { SemanticError( yylloc, "Type qualifiers/specifiers before TYPEDEF is deprecated, move after TYPEDEF." ); $$ = nullptr; }
2032 ;
2033
2034typedef_expression:
2035 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
2036 TYPEDEF identifier '=' assignment_expression
2037 {
2038 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2039 }
2040 | typedef_expression ',' identifier '=' assignment_expression
2041 {
2042 SemanticError( yylloc, "TYPEDEF expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
2043 }
2044 ;
2045
2046c_declaration:
2047 declaration_specifier declaring_list
2048 { $$ = distAttr( $1, $2 ); }
2049 | typedef_declaration
2050 | typedef_expression // deprecated GCC, naming expression type
2051 | sue_declaration_specifier
2052 {
2053 assert( $1->type );
2054 if ( $1->type->qualifiers.any() ) { // CV qualifiers ?
2055 SemanticError( yylloc, "syntax error, useless type qualifier(s) in empty declaration." ); $$ = nullptr;
2056 }
2057 // enums are never empty declarations because there must have at least one enumeration.
2058 if ( $1->type->kind == TypeData::AggregateInst && $1->storageClasses.any() ) { // storage class ?
2059 SemanticError( yylloc, "syntax error, useless storage qualifier(s) in empty aggregate declaration." ); $$ = nullptr;
2060 }
2061 }
2062 ;
2063
2064declaring_list:
2065 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
2066 // storage-class
2067 variable_declarator asm_name_opt initializer_opt
2068 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2069 | variable_type_redeclarator asm_name_opt initializer_opt
2070 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
2071
2072 | general_function_declarator asm_name_opt
2073 { $$ = $1->addAsmName( $2 )->addInitializer( nullptr ); }
2074 | general_function_declarator asm_name_opt '=' VOID
2075 { $$ = $1->addAsmName( $2 )->addInitializer( new InitializerNode( true ) ); }
2076
2077 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
2078 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
2079 ;
2080
2081general_function_declarator:
2082 function_type_redeclarator
2083 | function_declarator
2084 ;
2085
2086declaration_specifier: // type specifier + storage class
2087 basic_declaration_specifier
2088 | type_declaration_specifier
2089 | sue_declaration_specifier
2090 | sue_declaration_specifier invalid_types // invalid syntax rule
2091 {
2092 SemanticError( yylloc, ::toString( "syntax error, expecting ';' at end of ",
2093 $1->type->enumeration.name ? "enum" : ast::AggregateDecl::aggrString( $1->type->aggregate.kind ),
2094 " declaration." ) );
2095 $$ = nullptr;
2096 }
2097 ;
2098
2099invalid_types:
2100 aggregate_key
2101 | basic_type_name
2102 | indirect_type
2103 ;
2104
2105declaration_specifier_nobody: // type specifier + storage class - {...}
2106 // Preclude SUE declarations in restricted scopes:
2107 //
2108 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2109 //
2110 // because it is impossible to call f due to name equivalence.
2111 basic_declaration_specifier
2112 | sue_declaration_specifier_nobody
2113 | type_declaration_specifier
2114 ;
2115
2116type_specifier: // type specifier
2117 basic_type_specifier
2118 | sue_type_specifier
2119 | type_type_specifier
2120 ;
2121
2122type_specifier_nobody: // type specifier - {...}
2123 // Preclude SUE declarations in restricted scopes:
2124 //
2125 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2126 //
2127 // because it is impossible to call f due to name equivalence.
2128 basic_type_specifier
2129 | sue_type_specifier_nobody
2130 | type_type_specifier
2131 ;
2132
2133type_qualifier_list_opt: // GCC, used in asm_statement
2134 // empty
2135 { $$ = nullptr; }
2136 | type_qualifier_list
2137 ;
2138
2139type_qualifier_list:
2140 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2141 //
2142 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2143 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2144 // appeared only once.
2145 type_qualifier
2146 | type_qualifier_list type_qualifier
2147 { $$ = $1->addQualifiers( $2 ); }
2148 ;
2149
2150type_qualifier:
2151 type_qualifier_name
2152 | attribute // trick handles most atrribute locations
2153 ;
2154
2155type_qualifier_name:
2156 CONST
2157 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
2158 | RESTRICT
2159 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
2160 | VOLATILE
2161 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
2162 | ATOMIC
2163 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
2164 | forall
2165 { $$ = DeclarationNode::newForall( $1 ); }
2166 ;
2167
2168forall:
2169 FORALL '(' type_parameter_list ')' // CFA
2170 { $$ = $3; }
2171 ;
2172
2173declaration_qualifier_list:
2174 storage_class_list
2175 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2176 { $$ = $1->addQualifiers( $2 ); }
2177 | declaration_qualifier_list type_qualifier_list storage_class_list
2178 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2179 ;
2180
2181storage_class_list:
2182 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2183 // only one of each is specified, except for inline, which can appear with the others.
2184 //
2185 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2186 // specifiers in a declaration.
2187 storage_class
2188 | storage_class_list storage_class
2189 { $$ = $1->addQualifiers( $2 ); }
2190 ;
2191
2192storage_class:
2193 EXTERN
2194 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
2195 | STATIC
2196 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
2197 | AUTO
2198 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
2199 | REGISTER
2200 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
2201 | THREADLOCALGCC // GCC
2202 { $$ = DeclarationNode::newStorageClass( Type::ThreadlocalGcc ); }
2203 | THREADLOCALC11 // C11
2204 { $$ = DeclarationNode::newStorageClass( Type::ThreadlocalC11 ); }
2205 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2206 | INLINE // C99
2207 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
2208 | FORTRAN // C99
2209 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
2210 | NORETURN // C11
2211 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
2212 ;
2213
2214basic_type_name:
2215 VOID
2216 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2217 | BOOL // C99
2218 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
2219 | CHAR
2220 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
2221 | INT
2222 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
2223 | INT128
2224 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
2225 | UINT128
2226 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ); }
2227 | FLOAT
2228 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
2229 | DOUBLE
2230 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
2231 | uuFLOAT80
2232 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat80 ); }
2233 | uuFLOAT128
2234 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat128 ); }
2235 | uFLOAT16
2236 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat16 ); }
2237 | uFLOAT32
2238 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32 ); }
2239 | uFLOAT32X
2240 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32x ); }
2241 | uFLOAT64
2242 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64 ); }
2243 | uFLOAT64X
2244 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64x ); }
2245 | uFLOAT128
2246 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
2247 | DECIMAL32
2248 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2249 | DECIMAL64
2250 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2251 | DECIMAL128
2252 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2253 | COMPLEX // C99
2254 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
2255 | IMAGINARY // C99
2256 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
2257 | SIGNED
2258 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
2259 | UNSIGNED
2260 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
2261 | SHORT
2262 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
2263 | LONG
2264 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
2265 | VA_LIST // GCC, __builtin_va_list
2266 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
2267 | AUTO_TYPE
2268 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::AutoType ); }
2269 | vtable
2270 ;
2271
2272vtable_opt:
2273 // empty
2274 { $$ = nullptr; }
2275 | vtable
2276 ;
2277
2278vtable:
2279 VTABLE '(' type_name ')' default_opt
2280 { $$ = DeclarationNode::newVtableType( $3 ); }
2281 // { SemanticError( yylloc, "vtable is currently unimplemented." ); $$ = nullptr; }
2282 ;
2283
2284default_opt:
2285 // empty
2286 { $$ = nullptr; }
2287 | DEFAULT
2288 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2289 ;
2290
2291basic_declaration_specifier:
2292 // A semantic check is necessary for conflicting storage classes.
2293 basic_type_specifier
2294 | declaration_qualifier_list basic_type_specifier
2295 { $$ = $2->addQualifiers( $1 ); }
2296 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2297 { $$ = $1->addQualifiers( $2 ); }
2298 | basic_declaration_specifier storage_class type_qualifier_list
2299 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2300 | basic_declaration_specifier storage_class basic_type_specifier
2301 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2302 ;
2303
2304basic_type_specifier:
2305 direct_type
2306 // Cannot have type modifiers, e.g., short, long, etc.
2307 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2308 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2309 ;
2310
2311direct_type:
2312 basic_type_name
2313 | type_qualifier_list basic_type_name
2314 { $$ = $2->addQualifiers( $1 ); }
2315 | direct_type type_qualifier
2316 { $$ = $1->addQualifiers( $2 ); }
2317 | direct_type basic_type_name
2318 { $$ = $1->addType( $2 ); }
2319 ;
2320
2321indirect_type:
2322 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2323 { $$ = $3; }
2324 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2325 { $$ = DeclarationNode::newTypeof( $3 ); }
2326 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2327 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ), true ); }
2328 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2329 { $$ = DeclarationNode::newTypeof( $3, true ); }
2330 | ZERO_T // CFA
2331 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
2332 | ONE_T // CFA
2333 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
2334 ;
2335
2336sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2337 sue_type_specifier
2338 {
2339 // printf( "sue_declaration_specifier %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2340 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2341 // printf( "\tattr %s\n", attr->name.c_str() );
2342 // } // for
2343 }
2344 | declaration_qualifier_list sue_type_specifier
2345 { $$ = $2->addQualifiers( $1 ); }
2346 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2347 { $$ = $1->addQualifiers( $2 ); }
2348 | sue_declaration_specifier storage_class type_qualifier_list
2349 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2350 ;
2351
2352sue_type_specifier: // struct, union, enum + type specifier
2353 elaborated_type
2354 {
2355 // printf( "sue_type_specifier %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2356 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2357 // printf( "\tattr %s\n", attr->name.c_str() );
2358 // } // for
2359 }
2360 | type_qualifier_list
2361 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2362 elaborated_type
2363 { $$ = $3->addQualifiers( $1 ); }
2364 | sue_type_specifier type_qualifier
2365 {
2366 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2367 $$ = $1->addQualifiers( $2 );
2368 }
2369 ;
2370
2371sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2372 sue_type_specifier_nobody
2373 | declaration_qualifier_list sue_type_specifier_nobody
2374 { $$ = $2->addQualifiers( $1 ); }
2375 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2376 { $$ = $1->addQualifiers( $2 ); }
2377 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2378 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2379 ;
2380
2381sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2382 elaborated_type_nobody
2383 | type_qualifier_list elaborated_type_nobody
2384 { $$ = $2->addQualifiers( $1 ); }
2385 | sue_type_specifier_nobody type_qualifier
2386 { $$ = $1->addQualifiers( $2 ); }
2387 ;
2388
2389type_declaration_specifier:
2390 type_type_specifier
2391 | declaration_qualifier_list type_type_specifier
2392 { $$ = $2->addQualifiers( $1 ); }
2393 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2394 { $$ = $1->addQualifiers( $2 ); }
2395 | type_declaration_specifier storage_class type_qualifier_list
2396 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2397 ;
2398
2399type_type_specifier: // typedef types
2400 type_name
2401 | type_qualifier_list type_name
2402 { $$ = $2->addQualifiers( $1 ); }
2403 | type_type_specifier type_qualifier
2404 { $$ = $1->addQualifiers( $2 ); }
2405 ;
2406
2407type_name:
2408 TYPEDEFname
2409 { $$ = DeclarationNode::newFromTypedef( $1 ); }
2410 | '.' TYPEDEFname
2411 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), DeclarationNode::newFromTypedef( $2 ) ); }
2412 | type_name '.' TYPEDEFname
2413 { $$ = DeclarationNode::newQualifiedType( $1, DeclarationNode::newFromTypedef( $3 ) ); }
2414 | typegen_name
2415 | '.' typegen_name
2416 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), $2 ); }
2417 | type_name '.' typegen_name
2418 { $$ = DeclarationNode::newQualifiedType( $1, $3 ); }
2419 ;
2420
2421typegen_name: // CFA
2422 TYPEGENname
2423 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2424 | TYPEGENname '(' ')'
2425 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2426 | TYPEGENname '(' type_list ')'
2427 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
2428 ;
2429
2430elaborated_type: // struct, union, enum
2431 aggregate_type
2432 {
2433 // printf( "elaborated_type %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2434 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2435 // printf( "\tattr %s\n", attr->name.c_str() );
2436 // } // for
2437 }
2438 | enum_type
2439 ;
2440
2441elaborated_type_nobody: // struct, union, enum - {...}
2442 aggregate_type_nobody
2443 | enum_type_nobody
2444 ;
2445
2446aggregate_type: // struct, union
2447 aggregate_key attribute_list_opt
2448 { forall = false; } // reset
2449 '{' field_declaration_list_opt '}' type_parameters_opt
2450 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2451 | aggregate_key attribute_list_opt identifier
2452 {
2453 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 1" );
2454 forall = false; // reset
2455 }
2456 '{' field_declaration_list_opt '}' type_parameters_opt
2457 {
2458 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2459 }
2460 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2461 {
2462 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 2" );
2463 forall = false; // reset
2464 }
2465 '{' field_declaration_list_opt '}' type_parameters_opt
2466 {
2467 DeclarationNode::newFromTypedef( $3 );
2468 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2469 }
2470 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2471 {
2472 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type: 3" );
2473 forall = false; // reset
2474 }
2475 '{' field_declaration_list_opt '}' type_parameters_opt
2476 {
2477 DeclarationNode::newFromTypeGen( $3, nullptr );
2478 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2479 }
2480 | aggregate_type_nobody
2481 ;
2482
2483type_parameters_opt:
2484 // empty
2485 { $$ = nullptr; } %prec '}'
2486 | '(' type_list ')'
2487 { $$ = $2; }
2488 ;
2489
2490aggregate_type_nobody: // struct, union - {...}
2491 aggregate_key attribute_list_opt identifier
2492 {
2493 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname, "aggregate_type_nobody" );
2494 forall = false; // reset
2495 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2496 }
2497 | aggregate_key attribute_list_opt type_name
2498 {
2499 forall = false; // reset
2500 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2501 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2502 // delete newFromTypeGen.
2503 if ( $3->type->kind == TypeData::SymbolicInst && ! $3->type->symbolic.isTypedef ) {
2504 $$ = $3->addQualifiers( $2 );
2505 } else {
2506 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2507 $3->type->symbolic.name = nullptr; // copied to $$
2508 $3->type->symbolic.actuals = nullptr;
2509 delete $3;
2510 }
2511 }
2512 ;
2513
2514aggregate_key:
2515 aggregate_data
2516 | aggregate_control
2517 ;
2518
2519aggregate_data:
2520 STRUCT vtable_opt
2521 { $$ = ast::AggregateDecl::Struct; }
2522 | UNION
2523 { $$ = ast::AggregateDecl::Union; }
2524 | EXCEPTION // CFA
2525 { $$ = ast::AggregateDecl::Exception; }
2526 // { SemanticError( yylloc, "exception aggregate is currently unimplemented." ); $$ = ast::AggregateDecl::NoAggregate; }
2527 ;
2528
2529aggregate_control: // CFA
2530 MONITOR
2531 { $$ = ast::AggregateDecl::Monitor; }
2532 | MUTEX STRUCT
2533 { $$ = ast::AggregateDecl::Monitor; }
2534 | GENERATOR
2535 { $$ = ast::AggregateDecl::Generator; }
2536 | MUTEX GENERATOR
2537 {
2538 SemanticError( yylloc, "monitor generator is currently unimplemented." );
2539 $$ = ast::AggregateDecl::NoAggregate;
2540 }
2541 | COROUTINE
2542 { $$ = ast::AggregateDecl::Coroutine; }
2543 | MUTEX COROUTINE
2544 {
2545 SemanticError( yylloc, "monitor coroutine is currently unimplemented." );
2546 $$ = ast::AggregateDecl::NoAggregate;
2547 }
2548 | THREAD
2549 { $$ = ast::AggregateDecl::Thread; }
2550 | MUTEX THREAD
2551 {
2552 SemanticError( yylloc, "monitor thread is currently unimplemented." );
2553 $$ = ast::AggregateDecl::NoAggregate;
2554 }
2555 ;
2556
2557field_declaration_list_opt:
2558 // empty
2559 { $$ = nullptr; }
2560 | field_declaration_list_opt field_declaration
2561 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2562 ;
2563
2564field_declaration:
2565 type_specifier field_declaring_list_opt ';'
2566 {
2567 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2568 $$ = fieldDecl( $1, $2 );
2569 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2570 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2571 // printf( "\tattr %s\n", attr->name.c_str() );
2572 // } // for
2573 }
2574 | type_specifier field_declaring_list_opt '}' // invalid syntax rule
2575 {
2576 SemanticError( yylloc, ::toString( "syntax error, expecting ';' at end of previous declaration." ) );
2577 $$ = nullptr;
2578 }
2579 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2580 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2581 | STATIC type_specifier field_declaring_list_opt ';' // CFA
2582 { SemanticError( yylloc, "STATIC aggregate field qualifier currently unimplemented." ); $$ = nullptr; }
2583 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2584 {
2585 if ( ! $3 ) { // field declarator ?
2586 $3 = DeclarationNode::newName( nullptr );
2587 } // if
2588 $3->inLine = true;
2589 $$ = distAttr( $2, $3 ); // mark all fields in list
2590 distInl( $3 );
2591 }
2592 | INLINE aggregate_control ';' // CFA
2593 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2594 | typedef_declaration ';' // CFA
2595 | cfa_field_declaring_list ';' // CFA, new style field declaration
2596 | EXTENSION cfa_field_declaring_list ';' // GCC
2597 { distExt( $2 ); $$ = $2; } // mark all fields in list
2598 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2599 { $$ = $2; } // mark all fields in list
2600 | cfa_typedef_declaration ';' // CFA
2601 | static_assert // C11
2602 ;
2603
2604field_declaring_list_opt:
2605 // empty
2606 { $$ = nullptr; }
2607 | field_declarator
2608 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2609 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2610 ;
2611
2612field_declarator:
2613 bit_subrange_size // C special case, no field name
2614 { $$ = DeclarationNode::newBitfield( $1 ); }
2615 | variable_declarator bit_subrange_size_opt
2616 // A semantic check is required to ensure bit_subrange only appears on integral types.
2617 { $$ = $1->addBitfield( $2 ); }
2618 | variable_type_redeclarator bit_subrange_size_opt
2619 // A semantic check is required to ensure bit_subrange only appears on integral types.
2620 { $$ = $1->addBitfield( $2 ); }
2621 | function_type_redeclarator bit_subrange_size_opt
2622 // A semantic check is required to ensure bit_subrange only appears on integral types.
2623 { $$ = $1->addBitfield( $2 ); }
2624 ;
2625
2626field_abstract_list_opt:
2627 // empty
2628 { $$ = nullptr; }
2629 | field_abstract
2630 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2631 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2632 ;
2633
2634field_abstract:
2635 // no bit fields
2636 variable_abstract_declarator
2637 ;
2638
2639cfa_field_declaring_list: // CFA, new style field declaration
2640 // bit-fields are handled by C declarations
2641 cfa_abstract_declarator_tuple identifier_or_type_name
2642 { $$ = $1->addName( $2 ); }
2643 | cfa_field_declaring_list ',' identifier_or_type_name
2644 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
2645 ;
2646
2647cfa_field_abstract_list: // CFA, new style field declaration
2648 // bit-fields are handled by C declarations
2649 cfa_abstract_declarator_tuple
2650 | cfa_field_abstract_list ','
2651 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
2652 ;
2653
2654bit_subrange_size_opt:
2655 // empty
2656 { $$ = nullptr; }
2657 | bit_subrange_size
2658 ;
2659
2660bit_subrange_size:
2661 ':' assignment_expression
2662 { $$ = $2; }
2663 ;
2664
2665enum_type:
2666 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
2667 { $$ = DeclarationNode::newEnum( nullptr, $4, true, false )->addQualifiers( $2 ); }
2668 | ENUM attribute_list_opt '!' '{' enumerator_list comma_opt '}' // invalid syntax rule
2669 { SemanticError( yylloc, "syntax error, hiding '!' the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2670 | ENUM attribute_list_opt identifier
2671 { typedefTable.makeTypedef( *$3, "enum_type 1" ); }
2672 hide_opt '{' enumerator_list comma_opt '}'
2673 { $$ = DeclarationNode::newEnum( $3, $7, true, false, nullptr, $5 )->addQualifiers( $2 ); }
2674 | ENUM attribute_list_opt typedef_name hide_opt '{' enumerator_list comma_opt '}' // unqualified type name
2675 { $$ = DeclarationNode::newEnum( $3->name, $6, true, false, nullptr, $4 )->addQualifiers( $2 ); }
2676 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2677 {
2678 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.any() ) {
2679 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2680 }
2681 $$ = DeclarationNode::newEnum( nullptr, $7, true, true, $3 )->addQualifiers( $5 );
2682 }
2683 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '!' '{' enumerator_list comma_opt '}' // unqualified type name
2684 { SemanticError( yylloc, "syntax error, hiding '!' the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2685 | ENUM '(' ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2686 {
2687 $$ = DeclarationNode::newEnum( nullptr, $6, true, true )->addQualifiers( $4 );
2688 }
2689 | ENUM '(' ')' attribute_list_opt '!' '{' enumerator_list comma_opt '}' // invalid syntax rule
2690 { SemanticError( yylloc, "syntax error, hiding '!' the enumerator names of an anonymous enumeration means the names are inaccessible." ); $$ = nullptr; }
2691 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt identifier attribute_list_opt
2692 {
2693 if ( $3 && ($3->storageClasses.any() || $3->type->qualifiers.val != 0 )) {
2694 SemanticError( yylloc, "syntax error, storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." );
2695 }
2696 typedefTable.makeTypedef( *$6, "enum_type 2" );
2697 }
2698 hide_opt '{' enumerator_list comma_opt '}'
2699 {
2700 $$ = DeclarationNode::newEnum( $6, $11, true, true, $3, $9 )->addQualifiers( $5 )->addQualifiers( $7 );
2701 }
2702 | ENUM '(' ')' attribute_list_opt identifier attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2703 {
2704 $$ = DeclarationNode::newEnum( $5, $9, true, true, nullptr, $7 )->addQualifiers( $4 )->addQualifiers( $6 );
2705 }
2706 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2707 {
2708 $$ = DeclarationNode::newEnum( $6->name, $10, true, true, $3, $8 )->addQualifiers( $5 )->addQualifiers( $7 );
2709 }
2710 | ENUM '(' ')' attribute_list_opt typedef_name attribute_list_opt hide_opt '{' enumerator_list comma_opt '}'
2711 {
2712 $$ = DeclarationNode::newEnum( $5->name, $9, true, true, nullptr, $7 )->addQualifiers( $4 )->addQualifiers( $6 );
2713 }
2714 | enum_type_nobody
2715 ;
2716
2717hide_opt:
2718 // empty
2719 { $$ = EnumHiding::Visible; }
2720 | '!'
2721 { $$ = EnumHiding::Hide; }
2722 ;
2723
2724enum_type_nobody: // enum - {...}
2725 ENUM attribute_list_opt identifier
2726 {
2727 typedefTable.makeTypedef( *$3, "enum_type_nobody 1" );
2728 $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 );
2729 }
2730 | ENUM attribute_list_opt type_name
2731 {
2732 typedefTable.makeTypedef( *$3->type->symbolic.name, "enum_type_nobody 2" );
2733 $$ = DeclarationNode::newEnum( $3->type->symbolic.name, nullptr, false, false )->addQualifiers( $2 );
2734 }
2735 ;
2736
2737enumerator_list:
2738 visible_hide_opt identifier_or_type_name enumerator_value_opt
2739 { $$ = DeclarationNode::newEnumValueGeneric( $2, $3 ); }
2740 | INLINE type_name
2741 { $$ = DeclarationNode::newEnumInLine( *$2->type->symbolic.name ); }
2742 | enumerator_list ',' visible_hide_opt identifier_or_type_name enumerator_value_opt
2743 { $$ = $1->appendList( DeclarationNode::newEnumValueGeneric( $4, $5 ) ); }
2744 | enumerator_list ',' INLINE type_name enumerator_value_opt
2745 { $$ = $1->appendList( DeclarationNode::newEnumValueGeneric( new string("inline"), nullptr ) ); }
2746 ;
2747
2748visible_hide_opt:
2749 hide_opt
2750 | '^'
2751 { $$ = EnumHiding::Visible; }
2752 ;
2753
2754enumerator_value_opt:
2755 // empty
2756 { $$ = nullptr; }
2757 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2758 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2759 // | simple_assignment_operator initializer
2760 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2761 ;
2762
2763cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
2764 // empty
2765 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2766 | ELLIPSIS
2767 { $$ = nullptr; }
2768 | cfa_abstract_parameter_list
2769 | cfa_parameter_list
2770 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2771 { $$ = $1->appendList( $5 ); }
2772 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2773 { $$ = $1->addVarArgs(); }
2774 | cfa_parameter_list pop ',' push ELLIPSIS
2775 { $$ = $1->addVarArgs(); }
2776 ;
2777
2778cfa_parameter_list: // CFA
2779 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2780 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2781 cfa_parameter_declaration
2782 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2783 { $$ = $1->appendList( $5 ); }
2784 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2785 { $$ = $1->appendList( $5 ); }
2786 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2787 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2788 ;
2789
2790cfa_abstract_parameter_list: // CFA, new & old style abstract
2791 cfa_abstract_parameter_declaration
2792 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2793 { $$ = $1->appendList( $5 ); }
2794 ;
2795
2796parameter_type_list_opt:
2797 // empty
2798 { $$ = nullptr; }
2799 | ELLIPSIS
2800 { $$ = nullptr; }
2801 | parameter_list
2802 | parameter_list ',' ELLIPSIS
2803 { $$ = $1->addVarArgs(); }
2804 ;
2805
2806parameter_list: // abstract + real
2807 abstract_parameter_declaration
2808 | parameter_declaration
2809 | parameter_list ',' abstract_parameter_declaration
2810 { $$ = $1->appendList( $3 ); }
2811 | parameter_list ',' parameter_declaration
2812 { $$ = $1->appendList( $3 ); }
2813 ;
2814
2815// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2816// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2817
2818cfa_parameter_declaration: // CFA, new & old style parameter declaration
2819 parameter_declaration
2820 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2821 { $$ = $1->addName( $2 ); }
2822 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2823 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2824 { $$ = $1->addName( $2 ); }
2825 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2826 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2827 | cfa_function_specifier
2828 ;
2829
2830cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2831 abstract_parameter_declaration
2832 | cfa_identifier_parameter_declarator_no_tuple
2833 | cfa_abstract_tuple
2834 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2835 | type_qualifier_list cfa_abstract_tuple
2836 { $$ = $2->addQualifiers( $1 ); }
2837 | cfa_abstract_function
2838 ;
2839
2840parameter_declaration:
2841 // No SUE declaration in parameter list.
2842 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2843 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2844 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2845 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2846 ;
2847
2848abstract_parameter_declaration:
2849 declaration_specifier_nobody default_initializer_opt
2850 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2851 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2852 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2853 ;
2854
2855// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2856// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2857// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2858
2859identifier_list: // K&R-style parameter list => no types
2860 identifier
2861 { $$ = DeclarationNode::newName( $1 ); }
2862 | identifier_list ',' identifier
2863 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2864 ;
2865
2866identifier_or_type_name:
2867 identifier
2868 | TYPEDEFname
2869 | TYPEGENname
2870 ;
2871
2872type_no_function: // sizeof, alignof, cast (constructor)
2873 cfa_abstract_declarator_tuple // CFA
2874 | type_specifier // cannot be type_specifier_nobody, e.g., (struct S {}){} is a thing
2875 | type_specifier abstract_declarator
2876 { $$ = $2->addType( $1 ); }
2877 ;
2878
2879type: // typeof, assertion
2880 type_no_function
2881 | cfa_abstract_function // CFA
2882 ;
2883
2884initializer_opt:
2885 // empty
2886 { $$ = nullptr; }
2887 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2888 | '=' VOID { $$ = new InitializerNode( true ); }
2889 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2890 ;
2891
2892initializer:
2893 assignment_expression { $$ = new InitializerNode( $1 ); }
2894 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2895 ;
2896
2897initializer_list_opt:
2898 // empty
2899 { $$ = nullptr; }
2900 | initializer
2901 | designation initializer { $$ = $2->set_designators( $1 ); }
2902 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2903 | initializer_list_opt ',' designation initializer { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2904 ;
2905
2906// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2907// '=' to separator the designator from the initializer value, as in:
2908//
2909// int x[10] = { [1] = 3 };
2910//
2911// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2912// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2913// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2914// shift/reduce conflicts
2915
2916designation:
2917 designator_list ':' // C99, CFA uses ":" instead of "="
2918 | identifier_at ':' // GCC, field name
2919 { $$ = new ExpressionNode( build_varref( yylloc, $1 ) ); }
2920 ;
2921
2922designator_list: // C99
2923 designator
2924 | designator_list designator
2925 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
2926 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2927 ;
2928
2929designator:
2930 '.' identifier_at // C99, field name
2931 { $$ = new ExpressionNode( build_varref( yylloc, $2 ) ); }
2932 | '[' push assignment_expression pop ']' // C99, single array element
2933 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2934 { $$ = $3; }
2935 | '[' push subrange pop ']' // CFA, multiple array elements
2936 { $$ = $3; }
2937 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2938 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $3 ), maybeMoveBuild( $5 ) ) ); }
2939 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
2940 { $$ = $4; }
2941 ;
2942
2943// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2944// rather than an object-oriented type system. This required four groups of extensions:
2945//
2946// Overloading: function, data, and operator identifiers may be overloaded.
2947//
2948// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2949// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2950// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2951//
2952// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2953// site. A polymorphic function is not a template; it is a function, with an address and a type.
2954//
2955// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2956// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2957// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2958// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2959// on type arguments of polymorphic functions.
2960
2961type_parameter_list: // CFA
2962 type_parameter
2963 | type_parameter_list ',' type_parameter
2964 { $$ = $1->appendList( $3 ); }
2965 ;
2966
2967type_initializer_opt: // CFA
2968 // empty
2969 { $$ = nullptr; }
2970 | '=' type
2971 { $$ = $2; }
2972 ;
2973
2974type_parameter: // CFA
2975 type_class identifier_or_type_name
2976 {
2977 typedefTable.addToScope( *$2, TYPEDEFname, "type_parameter 1" );
2978 if ( $1 == ast::TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
2979 if ( $1 == ast::TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
2980 if ( $1 == ast::TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
2981 }
2982 type_initializer_opt assertion_list_opt
2983 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2984 | identifier_or_type_name new_type_class
2985 { typedefTable.addToScope( *$1, TYPEDEFname, "type_parameter 2" ); }
2986 type_initializer_opt assertion_list_opt
2987 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2988 | '[' identifier_or_type_name ']'
2989 {
2990 typedefTable.addToScope( *$2, TYPEDIMname, "type_parameter 3" );
2991 $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dimension, $2 );
2992 }
2993 // | type_specifier identifier_parameter_declarator
2994 | assertion_list
2995 { $$ = DeclarationNode::newTypeParam( ast::TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
2996 ;
2997
2998new_type_class: // CFA
2999 // empty
3000 { $$ = ast::TypeDecl::Otype; }
3001 | '&'
3002 { $$ = ast::TypeDecl::Dtype; }
3003 | '*'
3004 { $$ = ast::TypeDecl::DStype; } // dtype + sized
3005 // | '(' '*' ')'
3006 // { $$ = ast::TypeDecl::Ftype; }
3007 | ELLIPSIS
3008 { $$ = ast::TypeDecl::Ttype; }
3009 ;
3010
3011type_class: // CFA
3012 OTYPE
3013 { $$ = ast::TypeDecl::Otype; }
3014 | DTYPE
3015 { $$ = ast::TypeDecl::Dtype; }
3016 | FTYPE
3017 { $$ = ast::TypeDecl::Ftype; }
3018 | TTYPE
3019 { $$ = ast::TypeDecl::Ttype; }
3020 ;
3021
3022assertion_list_opt: // CFA
3023 // empty
3024 { $$ = nullptr; }
3025 | assertion_list
3026 ;
3027
3028assertion_list: // CFA
3029 assertion
3030 | assertion_list assertion
3031 { $$ = $1->appendList( $2 ); }
3032 ;
3033
3034assertion: // CFA
3035 '|' identifier_or_type_name '(' type_list ')'
3036 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
3037 | '|' '{' push trait_declaration_list pop '}'
3038 { $$ = $4; }
3039 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
3040 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
3041 ;
3042
3043type_list: // CFA
3044 type
3045 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3046 | assignment_expression
3047 | type_list ',' type
3048 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3049 | type_list ',' assignment_expression
3050 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
3051 ;
3052
3053type_declaring_list: // CFA
3054 OTYPE type_declarator
3055 { $$ = $2; }
3056 | storage_class_list OTYPE type_declarator
3057 { $$ = $3->addQualifiers( $1 ); }
3058 | type_declaring_list ',' type_declarator
3059 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
3060 ;
3061
3062type_declarator: // CFA
3063 type_declarator_name assertion_list_opt
3064 { $$ = $1->addAssertions( $2 ); }
3065 | type_declarator_name assertion_list_opt '=' type
3066 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
3067 ;
3068
3069type_declarator_name: // CFA
3070 identifier_or_type_name
3071 {
3072 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "type_declarator_name 1" );
3073 $$ = DeclarationNode::newTypeDecl( $1, nullptr );
3074 }
3075 | identifier_or_type_name '(' type_parameter_list ')'
3076 {
3077 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "type_declarator_name 2" );
3078 $$ = DeclarationNode::newTypeDecl( $1, $3 );
3079 }
3080 ;
3081
3082trait_specifier: // CFA
3083 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
3084 {
3085 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3086 $$ = DeclarationNode::newTrait( $2, $4, nullptr );
3087 }
3088 | forall TRAIT identifier_or_type_name '{' '}' // alternate
3089 { $$ = DeclarationNode::newTrait( $3, $1, nullptr ); }
3090 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
3091 {
3092 SemanticWarning( yylloc, Warning::DeprecTraitSyntax );
3093 $$ = DeclarationNode::newTrait( $2, $4, $8 );
3094 }
3095 | forall TRAIT identifier_or_type_name '{' push trait_declaration_list pop '}' // alternate
3096 { $$ = DeclarationNode::newTrait( $3, $1, $6 ); }
3097 ;
3098
3099trait_declaration_list: // CFA
3100 trait_declaration
3101 | trait_declaration_list pop push trait_declaration
3102 { $$ = $1->appendList( $4 ); }
3103 ;
3104
3105trait_declaration: // CFA
3106 cfa_trait_declaring_list ';'
3107 | trait_declaring_list ';'
3108 ;
3109
3110cfa_trait_declaring_list: // CFA
3111 cfa_variable_specifier
3112 | cfa_function_specifier
3113 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
3114 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
3115 ;
3116
3117trait_declaring_list: // CFA
3118 type_specifier declarator
3119 { $$ = $2->addType( $1 ); }
3120 | trait_declaring_list pop ',' push declarator
3121 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
3122 ;
3123
3124// **************************** EXTERNAL DEFINITIONS *****************************
3125
3126translation_unit:
3127 // empty, input file
3128 | external_definition_list
3129 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
3130 ;
3131
3132external_definition_list:
3133 push external_definition pop
3134 { $$ = $2; }
3135 | external_definition_list push external_definition pop
3136 { $$ = $1 ? $1->appendList( $3 ) : $3; }
3137 ;
3138
3139external_definition_list_opt:
3140 // empty
3141 { $$ = nullptr; }
3142 | external_definition_list
3143 ;
3144
3145up:
3146 { typedefTable.up( forall ); forall = false; }
3147 ;
3148
3149down:
3150 { typedefTable.down(); }
3151 ;
3152
3153external_definition:
3154 DIRECTIVE
3155 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( yylloc, $1 ) ) ); }
3156 | declaration
3157 {
3158 // Variable declarations of anonymous types requires creating a unique type-name across multiple translation
3159 // unit, which is a dubious task, especially because C uses name rather than structural typing; hence it is
3160 // disallowed at the moment.
3161 if ( $1->linkage == ast::Linkage::Cforall && ! $1->storageClasses.is_static && $1->type && $1->type->kind == TypeData::AggregateInst ) {
3162 if ( $1->type->aggInst.aggregate->kind == TypeData::Enum && $1->type->aggInst.aggregate->enumeration.anon ) {
3163 SemanticError( yylloc, "extern anonymous enumeration is currently unimplemented." ); $$ = nullptr;
3164 } else if ( $1->type->aggInst.aggregate->aggregate.anon ) { // handles struct or union
3165 SemanticError( yylloc, "extern anonymous struct/union is currently unimplemented." ); $$ = nullptr;
3166 }
3167 }
3168 }
3169 | IDENTIFIER IDENTIFIER
3170 { IdentifierBeforeIdentifier( *$1.str, *$2.str, " declaration" ); $$ = nullptr; }
3171 | IDENTIFIER type_qualifier // invalid syntax rule
3172 { IdentifierBeforeType( *$1.str, "type qualifier" ); $$ = nullptr; }
3173 | IDENTIFIER storage_class // invalid syntax rule
3174 { IdentifierBeforeType( *$1.str, "storage class" ); $$ = nullptr; }
3175 | IDENTIFIER basic_type_name // invalid syntax rule
3176 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3177 | IDENTIFIER TYPEDEFname // invalid syntax rule
3178 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3179 | IDENTIFIER TYPEGENname // invalid syntax rule
3180 { IdentifierBeforeType( *$1.str, "type" ); $$ = nullptr; }
3181 | external_function_definition
3182 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
3183 {
3184 distExt( $2 ); // mark all fields in list
3185 $$ = $2;
3186 }
3187 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3188 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( yylloc, false, $3, nullptr ) ) ); }
3189 | EXTERN STRINGliteral
3190 {
3191 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3192 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3193 }
3194 up external_definition down
3195 {
3196 linkage = linkageStack.top();
3197 linkageStack.pop();
3198 $$ = $5;
3199 }
3200 | EXTERN STRINGliteral // C++-style linkage specifier
3201 {
3202 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3203 linkage = ast::Linkage::update( yylloc, linkage, $2 );
3204 }
3205 '{' up external_definition_list_opt down '}'
3206 {
3207 linkage = linkageStack.top();
3208 linkageStack.pop();
3209 $$ = $6;
3210 }
3211 // global distribution
3212 | type_qualifier_list
3213 {
3214 if ( $1->type->qualifiers.any() ) {
3215 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3216 }
3217 if ( $1->type->forall ) forall = true; // remember generic type
3218 }
3219 '{' up external_definition_list_opt down '}' // CFA, namespace
3220 {
3221 distQual( $5, $1 );
3222 forall = false;
3223 $$ = $5;
3224 }
3225 | declaration_qualifier_list
3226 {
3227 if ( $1->type && $1->type->qualifiers.any() ) {
3228 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3229 }
3230 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3231 }
3232 '{' up external_definition_list_opt down '}' // CFA, namespace
3233 {
3234 distQual( $5, $1 );
3235 forall = false;
3236 $$ = $5;
3237 }
3238 | declaration_qualifier_list type_qualifier_list
3239 {
3240 if ( ($1->type && $1->type->qualifiers.any()) || ($2->type && $2->type->qualifiers.any()) ) {
3241 SemanticError( yylloc, "syntax error, CV qualifiers cannot be distributed; only storage-class and forall qualifiers." );
3242 }
3243 if ( ($1->type && $1->type->forall) || ($2->type && $2->type->forall) ) forall = true; // remember generic type
3244 }
3245 '{' up external_definition_list_opt down '}' // CFA, namespace
3246 {
3247 distQual( $6, $1->addQualifiers( $2 ) );
3248 forall = false;
3249 $$ = $6;
3250 }
3251 ;
3252
3253external_function_definition:
3254 function_definition
3255 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3256 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3257 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3258 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3259 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3260 | function_declarator compound_statement
3261 { $$ = $1->addFunctionBody( $2 ); }
3262 | KR_function_declarator KR_parameter_list_opt compound_statement
3263 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3264 ;
3265
3266with_clause_opt:
3267 // empty
3268 { $$ = nullptr; forall = false; }
3269 | WITH '(' tuple_expression_list ')' attribute_list_opt
3270 {
3271 $$ = $3; forall = false;
3272 if ( $5 ) {
3273 SemanticError( yylloc, "syntax error, attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3274 $$ = nullptr;
3275 } // if
3276 }
3277 ;
3278
3279function_definition:
3280 cfa_function_declaration with_clause_opt compound_statement // CFA
3281 {
3282 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3283 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3284 $1->get_last()->addFunctionBody( $3, $2 );
3285 $$ = $1;
3286 }
3287 | declaration_specifier function_declarator with_clause_opt compound_statement
3288 {
3289 rebindForall( $1, $2 );
3290 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3291 }
3292 | declaration_specifier function_type_redeclarator with_clause_opt compound_statement
3293 {
3294 rebindForall( $1, $2 );
3295 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3296 }
3297 // handles default int return type, OBSOLESCENT (see 1)
3298 | type_qualifier_list function_declarator with_clause_opt compound_statement
3299 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3300 // handles default int return type, OBSOLESCENT (see 1)
3301 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3302 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3303 // handles default int return type, OBSOLESCENT (see 1)
3304 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3305 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3306
3307 // Old-style K&R function definition, OBSOLESCENT (see 4)
3308 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3309 {
3310 rebindForall( $1, $2 );
3311 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3312 }
3313 // handles default int return type, OBSOLESCENT (see 1)
3314 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3315 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3316 // handles default int return type, OBSOLESCENT (see 1)
3317 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3318 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3319 // handles default int return type, OBSOLESCENT (see 1)
3320 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3321 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3322 ;
3323
3324declarator:
3325 variable_declarator
3326 | variable_type_redeclarator
3327 | function_declarator
3328 | function_type_redeclarator
3329 ;
3330
3331subrange:
3332 constant_expression '~' constant_expression // CFA, integer subrange
3333 { $$ = new ExpressionNode( new ast::RangeExpr( yylloc, maybeMoveBuild( $1 ), maybeMoveBuild( $3 ) ) ); }
3334 ;
3335
3336asm_name_opt: // GCC
3337 // empty
3338 { $$ = nullptr; }
3339 | ASM '(' string_literal ')' attribute_list_opt
3340 {
3341 DeclarationNode * name = new DeclarationNode();
3342 name->asmName = maybeMoveBuild( $3 );
3343 $$ = name->addQualifiers( $5 );
3344 }
3345 ;
3346
3347attribute_list_opt: // GCC
3348 // empty
3349 { $$ = nullptr; }
3350 | attribute_list
3351 ;
3352
3353attribute_list: // GCC
3354 attribute
3355 | attribute_list attribute
3356 { $$ = $2->addQualifiers( $1 ); }
3357 ;
3358
3359attribute: // GCC
3360 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3361 { $$ = $4; }
3362 ;
3363
3364attribute_name_list: // GCC
3365 attribute_name
3366 | attribute_name_list ',' attribute_name
3367 { $$ = $3->addQualifiers( $1 ); }
3368 ;
3369
3370attribute_name: // GCC
3371 // empty
3372 { $$ = nullptr; }
3373 | attr_name
3374 { $$ = DeclarationNode::newAttribute( $1 ); }
3375 | attr_name '(' argument_expression_list_opt ')'
3376 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3377 ;
3378
3379attr_name: // GCC
3380 IDENTIFIER
3381 | quasi_keyword
3382 | TYPEDEFname
3383 | TYPEGENname
3384 | FALLTHROUGH
3385 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3386 | CONST
3387 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3388 ;
3389
3390// ============================================================================
3391// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3392// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3393// in:
3394//
3395// int (*f())[10] { ... };
3396// ... (*f())[3] += 1; // definition mimics usage
3397//
3398// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3399// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3400// ============================================================================
3401
3402// ----------------------------------------------------------------------------
3403// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3404// to define a variable or function prototype, e.g.:
3405//
3406// valid declaration invalid definition
3407// ----------------- ------------------
3408// int f; int f {}
3409// int *f; int *f {}
3410// int f[10]; int f[10] {}
3411// int (*f)(int); int (*f)(int) {}
3412//
3413// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3414// variable_declarator and function_declarator.
3415// ----------------------------------------------------------------------------
3416
3417// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3418// declaring an array of functions versus a pointer to an array of functions.
3419
3420paren_identifier:
3421 identifier_at
3422 { $$ = DeclarationNode::newName( $1 ); }
3423 | '(' paren_identifier ')' // redundant parenthesis
3424 { $$ = $2; }
3425 ;
3426
3427variable_declarator:
3428 paren_identifier attribute_list_opt
3429 { $$ = $1->addQualifiers( $2 ); }
3430 | variable_ptr
3431 | variable_array attribute_list_opt
3432 { $$ = $1->addQualifiers( $2 ); }
3433 | variable_function attribute_list_opt
3434 { $$ = $1->addQualifiers( $2 ); }
3435 ;
3436
3437variable_ptr:
3438 ptrref_operator variable_declarator
3439 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3440 | ptrref_operator type_qualifier_list variable_declarator
3441 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3442 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3443 { $$ = $2->addQualifiers( $4 ); }
3444 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3445 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3446 ;
3447
3448variable_array:
3449 paren_identifier array_dimension
3450 { $$ = $1->addArray( $2 ); }
3451 | '(' variable_ptr ')' array_dimension
3452 { $$ = $2->addArray( $4 ); }
3453 | '(' attribute_list variable_ptr ')' array_dimension
3454 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3455 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3456 { $$ = $2->addArray( $4 ); }
3457 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3458 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3459 | '(' variable_array ')' // redundant parenthesis
3460 { $$ = $2; }
3461 | '(' attribute_list variable_array ')' // redundant parenthesis
3462 { $$ = $3->addQualifiers( $2 ); }
3463 ;
3464
3465variable_function:
3466 '(' variable_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3467 { $$ = $2->addParamList( $5 ); }
3468 | '(' attribute_list variable_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3469 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3470 | '(' variable_function ')' // redundant parenthesis
3471 { $$ = $2; }
3472 | '(' attribute_list variable_function ')' // redundant parenthesis
3473 { $$ = $3->addQualifiers( $2 ); }
3474 ;
3475
3476// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3477// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3478// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3479
3480function_declarator:
3481 function_no_ptr attribute_list_opt
3482 { $$ = $1->addQualifiers( $2 ); }
3483 | function_ptr
3484 | function_array attribute_list_opt
3485 { $$ = $1->addQualifiers( $2 ); }
3486 ;
3487
3488function_no_ptr:
3489 paren_identifier '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3490 { $$ = $1->addParamList( $3 ); }
3491 | '(' function_ptr ')' '(' parameter_type_list_opt ')'
3492 { $$ = $2->addParamList( $5 ); }
3493 | '(' attribute_list function_ptr ')' '(' parameter_type_list_opt ')'
3494 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3495 | '(' function_no_ptr ')' // redundant parenthesis
3496 { $$ = $2; }
3497 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3498 { $$ = $3->addQualifiers( $2 ); }
3499 ;
3500
3501function_ptr:
3502 ptrref_operator function_declarator
3503 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3504 | ptrref_operator type_qualifier_list function_declarator
3505 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3506 | '(' function_ptr ')' attribute_list_opt
3507 { $$ = $2->addQualifiers( $4 ); }
3508 | '(' attribute_list function_ptr ')' attribute_list_opt
3509 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3510 ;
3511
3512function_array:
3513 '(' function_ptr ')' array_dimension
3514 { $$ = $2->addArray( $4 ); }
3515 | '(' attribute_list function_ptr ')' array_dimension
3516 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3517 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3518 { $$ = $2->addArray( $4 ); }
3519 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3520 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3521 | '(' function_array ')' // redundant parenthesis
3522 { $$ = $2; }
3523 | '(' attribute_list function_array ')' // redundant parenthesis
3524 { $$ = $3->addQualifiers( $2 ); }
3525 ;
3526
3527// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3528//
3529// f( a, b, c ) int a, *b, c[]; {}
3530//
3531// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3532// returning arrays and functions versus pointers to arrays and functions.
3533
3534KR_function_declarator:
3535 KR_function_no_ptr
3536 | KR_function_ptr
3537 | KR_function_array
3538 ;
3539
3540KR_function_no_ptr:
3541 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3542 { $$ = $1->addIdList( $3 ); }
3543 | '(' KR_function_ptr ')' '(' parameter_type_list_opt ')'
3544 { $$ = $2->addParamList( $5 ); }
3545 | '(' attribute_list KR_function_ptr ')' '(' parameter_type_list_opt ')'
3546 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3547 | '(' KR_function_no_ptr ')' // redundant parenthesis
3548 { $$ = $2; }
3549 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3550 { $$ = $3->addQualifiers( $2 ); }
3551 ;
3552
3553KR_function_ptr:
3554 ptrref_operator KR_function_declarator
3555 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3556 | ptrref_operator type_qualifier_list KR_function_declarator
3557 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3558 | '(' KR_function_ptr ')'
3559 { $$ = $2; }
3560 | '(' attribute_list KR_function_ptr ')'
3561 { $$ = $3->addQualifiers( $2 ); }
3562 ;
3563
3564KR_function_array:
3565 '(' KR_function_ptr ')' array_dimension
3566 { $$ = $2->addArray( $4 ); }
3567 | '(' attribute_list KR_function_ptr ')' array_dimension
3568 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3569 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3570 { $$ = $2->addArray( $4 ); }
3571 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3572 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3573 | '(' KR_function_array ')' // redundant parenthesis
3574 { $$ = $2; }
3575 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3576 { $$ = $3->addQualifiers( $2 ); }
3577 ;
3578
3579// This pattern parses a declaration for a variable that redefines a type name, e.g.:
3580//
3581// typedef int foo;
3582// {
3583// int foo; // redefine typedef name in new scope
3584// }
3585
3586paren_type:
3587 typedef_name
3588 {
3589 // hide type name in enclosing scope by variable name
3590 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "paren_type" );
3591 }
3592 | '(' paren_type ')'
3593 { $$ = $2; }
3594 ;
3595
3596variable_type_redeclarator:
3597 paren_type attribute_list_opt
3598 { $$ = $1->addQualifiers( $2 ); }
3599 | variable_type_ptr
3600 | variable_type_array attribute_list_opt
3601 { $$ = $1->addQualifiers( $2 ); }
3602 | variable_type_function attribute_list_opt
3603 { $$ = $1->addQualifiers( $2 ); }
3604 ;
3605
3606variable_type_ptr:
3607 ptrref_operator variable_type_redeclarator
3608 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3609 | ptrref_operator type_qualifier_list variable_type_redeclarator
3610 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3611 | '(' variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3612 { $$ = $2->addQualifiers( $4 ); }
3613 | '(' attribute_list variable_type_ptr ')' attribute_list_opt // redundant parenthesis
3614 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3615 ;
3616
3617variable_type_array:
3618 paren_type array_dimension
3619 { $$ = $1->addArray( $2 ); }
3620 | '(' variable_type_ptr ')' array_dimension
3621 { $$ = $2->addArray( $4 ); }
3622 | '(' attribute_list variable_type_ptr ')' array_dimension
3623 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3624 | '(' variable_type_array ')' multi_array_dimension // redundant parenthesis
3625 { $$ = $2->addArray( $4 ); }
3626 | '(' attribute_list variable_type_array ')' multi_array_dimension // redundant parenthesis
3627 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3628 | '(' variable_type_array ')' // redundant parenthesis
3629 { $$ = $2; }
3630 | '(' attribute_list variable_type_array ')' // redundant parenthesis
3631 { $$ = $3->addQualifiers( $2 ); }
3632 ;
3633
3634variable_type_function:
3635 '(' variable_type_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3636 { $$ = $2->addParamList( $5 ); }
3637 | '(' attribute_list variable_type_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3638 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3639 | '(' variable_type_function ')' // redundant parenthesis
3640 { $$ = $2; }
3641 | '(' attribute_list variable_type_function ')' // redundant parenthesis
3642 { $$ = $3->addQualifiers( $2 ); }
3643 ;
3644
3645// This pattern parses a declaration for a function prototype that redefines a type name. It precludes declaring an
3646// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
3647// arrays and functions.
3648
3649function_type_redeclarator:
3650 function_type_no_ptr attribute_list_opt
3651 { $$ = $1->addQualifiers( $2 ); }
3652 | function_type_ptr
3653 | function_type_array attribute_list_opt
3654 { $$ = $1->addQualifiers( $2 ); }
3655 ;
3656
3657function_type_no_ptr:
3658 paren_type '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3659 { $$ = $1->addParamList( $3 ); }
3660 | '(' function_type_ptr ')' '(' parameter_type_list_opt ')'
3661 { $$ = $2->addParamList( $5 ); }
3662 | '(' attribute_list function_type_ptr ')' '(' parameter_type_list_opt ')'
3663 { $$ = $3->addQualifiers( $2 )->addParamList( $6 ); }
3664 | '(' function_type_no_ptr ')' // redundant parenthesis
3665 { $$ = $2; }
3666 | '(' attribute_list function_type_no_ptr ')' // redundant parenthesis
3667 { $$ = $3->addQualifiers( $2 ); }
3668 ;
3669
3670function_type_ptr:
3671 ptrref_operator function_type_redeclarator
3672 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3673 | ptrref_operator type_qualifier_list function_type_redeclarator
3674 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3675 | '(' function_type_ptr ')' attribute_list_opt
3676 { $$ = $2->addQualifiers( $4 ); }
3677 | '(' attribute_list function_type_ptr ')' attribute_list_opt
3678 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3679 ;
3680
3681function_type_array:
3682 '(' function_type_ptr ')' array_dimension
3683 { $$ = $2->addArray( $4 ); }
3684 | '(' attribute_list function_type_ptr ')' array_dimension
3685 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3686 | '(' function_type_array ')' multi_array_dimension // redundant parenthesis
3687 { $$ = $2->addArray( $4 ); }
3688 | '(' attribute_list function_type_array ')' multi_array_dimension // redundant parenthesis
3689 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3690 | '(' function_type_array ')' // redundant parenthesis
3691 { $$ = $2; }
3692 | '(' attribute_list function_type_array ')' // redundant parenthesis
3693 { $$ = $3->addQualifiers( $2 ); }
3694 ;
3695
3696// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3697// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3698// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3699// pointers to arrays and functions.
3700
3701identifier_parameter_declarator:
3702 paren_identifier attribute_list_opt
3703 { $$ = $1->addQualifiers( $2 ); }
3704 | '&' MUTEX paren_identifier attribute_list_opt
3705 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3706 | identifier_parameter_ptr
3707 | identifier_parameter_array attribute_list_opt
3708 { $$ = $1->addQualifiers( $2 ); }
3709 | identifier_parameter_function attribute_list_opt
3710 { $$ = $1->addQualifiers( $2 ); }
3711 ;
3712
3713identifier_parameter_ptr:
3714 ptrref_operator identifier_parameter_declarator
3715 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3716 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3717 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3718 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3719 { $$ = $2->addQualifiers( $4 ); }
3720 ;
3721
3722identifier_parameter_array:
3723 paren_identifier array_parameter_dimension
3724 { $$ = $1->addArray( $2 ); }
3725 | '(' identifier_parameter_ptr ')' array_dimension
3726 { $$ = $2->addArray( $4 ); }
3727 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3728 { $$ = $2->addArray( $4 ); }
3729 | '(' identifier_parameter_array ')' // redundant parenthesis
3730 { $$ = $2; }
3731 ;
3732
3733identifier_parameter_function:
3734 paren_identifier '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3735 { $$ = $1->addParamList( $3 ); }
3736 | '(' identifier_parameter_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3737 { $$ = $2->addParamList( $5 ); }
3738 | '(' identifier_parameter_function ')' // redundant parenthesis
3739 { $$ = $2; }
3740 ;
3741
3742// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3743// e.g.:
3744//
3745// typedef int foo;
3746// forall( otype T ) struct foo;
3747// int f( int foo ); // redefine typedef name in new scope
3748//
3749// and allows the C99 array options, which can only appear in a parameter list.
3750
3751type_parameter_redeclarator:
3752 typedef_name attribute_list_opt
3753 { $$ = $1->addQualifiers( $2 ); }
3754 | '&' MUTEX typedef_name attribute_list_opt
3755 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3756 | type_parameter_ptr
3757 | type_parameter_array attribute_list_opt
3758 { $$ = $1->addQualifiers( $2 ); }
3759 | type_parameter_function attribute_list_opt
3760 { $$ = $1->addQualifiers( $2 ); }
3761 ;
3762
3763typedef_name:
3764 TYPEDEFname
3765 { $$ = DeclarationNode::newName( $1 ); }
3766 | TYPEGENname
3767 { $$ = DeclarationNode::newName( $1 ); }
3768 ;
3769
3770type_parameter_ptr:
3771 ptrref_operator type_parameter_redeclarator
3772 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3773 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3774 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3775 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3776 { $$ = $2->addQualifiers( $4 ); }
3777 ;
3778
3779type_parameter_array:
3780 typedef_name array_parameter_dimension
3781 { $$ = $1->addArray( $2 ); }
3782 | '(' type_parameter_ptr ')' array_parameter_dimension
3783 { $$ = $2->addArray( $4 ); }
3784 ;
3785
3786type_parameter_function:
3787 typedef_name '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3788 { $$ = $1->addParamList( $3 ); }
3789 | '(' type_parameter_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3790 { $$ = $2->addParamList( $5 ); }
3791 ;
3792
3793// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3794// which the type applies, e.g.:
3795//
3796// sizeof( int );
3797// sizeof( int * );
3798// sizeof( int [10] );
3799// sizeof( int (*)() );
3800// sizeof( int () );
3801//
3802// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3803// and functions versus pointers to arrays and functions.
3804
3805abstract_declarator:
3806 abstract_ptr
3807 | abstract_array attribute_list_opt
3808 { $$ = $1->addQualifiers( $2 ); }
3809 | abstract_function attribute_list_opt
3810 { $$ = $1->addQualifiers( $2 ); }
3811 ;
3812
3813abstract_ptr:
3814 ptrref_operator
3815 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3816 | ptrref_operator type_qualifier_list
3817 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3818 | ptrref_operator abstract_declarator
3819 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3820 | ptrref_operator type_qualifier_list abstract_declarator
3821 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3822 | '(' abstract_ptr ')' attribute_list_opt
3823 { $$ = $2->addQualifiers( $4 ); }
3824 ;
3825
3826abstract_array:
3827 array_dimension
3828 | '(' abstract_ptr ')' array_dimension
3829 { $$ = $2->addArray( $4 ); }
3830 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3831 { $$ = $2->addArray( $4 ); }
3832 | '(' abstract_array ')' // redundant parenthesis
3833 { $$ = $2; }
3834 ;
3835
3836abstract_function:
3837 '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3838 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3839 | '(' abstract_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3840 { $$ = $2->addParamList( $5 ); }
3841 | '(' abstract_function ')' // redundant parenthesis
3842 { $$ = $2; }
3843 ;
3844
3845array_dimension:
3846 // Only the first dimension can be empty.
3847 '[' ']'
3848 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3849 | '[' ']' multi_array_dimension
3850 { $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
3851 // Cannot use constant_expression because of tuples => semantic check
3852 | '[' push assignment_expression pop ',' comma_expression ']' // CFA
3853 { $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
3854 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3855 | '[' push array_type_list pop ']' // CFA
3856 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3857 | multi_array_dimension
3858 ;
3859
3860array_type_list:
3861 basic_type_name
3862 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3863 | type_name
3864 { $$ = new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $1 ) ) ); }
3865 | assignment_expression upupeq assignment_expression
3866 | array_type_list ',' basic_type_name
3867 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3868 | array_type_list ',' type_name
3869 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new ast::TypeExpr( yylloc, maybeMoveBuildType( $3 ) ) ) )); }
3870 | array_type_list ',' assignment_expression upupeq assignment_expression
3871 ;
3872
3873upupeq:
3874 '~'
3875 { $$ = OperKinds::LThan; }
3876 | ErangeUpEq
3877 { $$ = OperKinds::LEThan; }
3878 ;
3879
3880multi_array_dimension:
3881 '[' push assignment_expression pop ']'
3882 { $$ = DeclarationNode::newArray( $3, nullptr, false ); }
3883 | '[' push '*' pop ']' // C99
3884 { $$ = DeclarationNode::newVarArray( 0 ); }
3885 | multi_array_dimension '[' push assignment_expression pop ']'
3886 { $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
3887 | multi_array_dimension '[' push '*' pop ']' // C99
3888 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3889 ;
3890
3891// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3892// identifier to which the type applies, e.g.:
3893//
3894// int f( int ); // not handled here
3895// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3896// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3897// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3898//
3899// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3900// and functions versus pointers to arrays and functions. In addition, the pattern handles the
3901// special meaning of parenthesis around a typedef name:
3902//
3903// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
3904// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
3905// not as redundant parentheses around the identifier."
3906//
3907// For example:
3908//
3909// typedef float T;
3910// int f( int ( T [5] ) ); // see abstract_parameter_declarator
3911// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
3912// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
3913// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
3914//
3915// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
3916// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
3917// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
3918// functions.
3919
3920abstract_parameter_declarator_opt:
3921 // empty
3922 { $$ = nullptr; }
3923 | abstract_parameter_declarator
3924 ;
3925
3926abstract_parameter_declarator:
3927 abstract_parameter_ptr
3928 | '&' MUTEX attribute_list_opt
3929 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
3930 | abstract_parameter_array attribute_list_opt
3931 { $$ = $1->addQualifiers( $2 ); }
3932 | abstract_parameter_function attribute_list_opt
3933 { $$ = $1->addQualifiers( $2 ); }
3934 ;
3935
3936abstract_parameter_ptr:
3937 ptrref_operator
3938 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3939 | ptrref_operator type_qualifier_list
3940 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3941 | ptrref_operator abstract_parameter_declarator
3942 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3943 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3944 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3945 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3946 { $$ = $2->addQualifiers( $4 ); }
3947 ;
3948
3949abstract_parameter_array:
3950 array_parameter_dimension
3951 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3952 { $$ = $2->addArray( $4 ); }
3953 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3954 { $$ = $2->addArray( $4 ); }
3955 | '(' abstract_parameter_array ')' // redundant parenthesis
3956 { $$ = $2; }
3957 ;
3958
3959abstract_parameter_function:
3960 '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3961 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $2, nullptr ); }
3962 | '(' abstract_parameter_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
3963 { $$ = $2->addParamList( $5 ); }
3964 | '(' abstract_parameter_function ')' // redundant parenthesis
3965 { $$ = $2; }
3966 ;
3967
3968array_parameter_dimension:
3969 // Only the first dimension can be empty or have qualifiers.
3970 array_parameter_1st_dimension
3971 | array_parameter_1st_dimension multi_array_dimension
3972 { $$ = $1->addArray( $2 ); }
3973 | multi_array_dimension
3974 ;
3975
3976// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3977//
3978// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3979// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3980
3981array_parameter_1st_dimension:
3982 '[' ']'
3983 { $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
3984 // multi_array_dimension handles the '[' '*' ']' case
3985 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3986 { $$ = DeclarationNode::newVarArray( $3 ); }
3987 | '[' push type_qualifier_list pop ']'
3988 { $$ = DeclarationNode::newArray( nullptr, $3, false ); }
3989 // multi_array_dimension handles the '[' assignment_expression ']' case
3990 | '[' push type_qualifier_list assignment_expression pop ']'
3991 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3992 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3993 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3994 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3995 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3996 ;
3997
3998// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3999//
4000// struct S {
4001// int;
4002// int *;
4003// int [10];
4004// int (*)();
4005// };
4006
4007variable_abstract_declarator:
4008 variable_abstract_ptr
4009 | variable_abstract_array attribute_list_opt
4010 { $$ = $1->addQualifiers( $2 ); }
4011 | variable_abstract_function attribute_list_opt
4012 { $$ = $1->addQualifiers( $2 ); }
4013 ;
4014
4015variable_abstract_ptr:
4016 ptrref_operator
4017 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
4018 | ptrref_operator type_qualifier_list
4019 { $$ = DeclarationNode::newPointer( $2, $1 ); }
4020 | ptrref_operator variable_abstract_declarator
4021 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4022 | ptrref_operator type_qualifier_list variable_abstract_declarator
4023 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
4024 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
4025 { $$ = $2->addQualifiers( $4 ); }
4026 ;
4027
4028variable_abstract_array:
4029 array_dimension
4030 | '(' variable_abstract_ptr ')' array_dimension
4031 { $$ = $2->addArray( $4 ); }
4032 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
4033 { $$ = $2->addArray( $4 ); }
4034 | '(' variable_abstract_array ')' // redundant parenthesis
4035 { $$ = $2; }
4036 ;
4037
4038variable_abstract_function:
4039 '(' variable_abstract_ptr ')' '(' parameter_type_list_opt ')' // empty parameter list OBSOLESCENT (see 3)
4040 { $$ = $2->addParamList( $5 ); }
4041 | '(' variable_abstract_function ')' // redundant parenthesis
4042 { $$ = $2; }
4043 ;
4044
4045// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
4046// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
4047
4048cfa_identifier_parameter_declarator_tuple: // CFA
4049 cfa_identifier_parameter_declarator_no_tuple
4050 | cfa_abstract_tuple
4051 | type_qualifier_list cfa_abstract_tuple
4052 { $$ = $2->addQualifiers( $1 ); }
4053 ;
4054
4055cfa_identifier_parameter_declarator_no_tuple: // CFA
4056 cfa_identifier_parameter_ptr
4057 | cfa_identifier_parameter_array
4058 ;
4059
4060cfa_identifier_parameter_ptr: // CFA
4061 // No SUE declaration in parameter list.
4062 ptrref_operator type_specifier_nobody
4063 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4064 | type_qualifier_list ptrref_operator type_specifier_nobody
4065 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4066 | ptrref_operator cfa_abstract_function
4067 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4068 | type_qualifier_list ptrref_operator cfa_abstract_function
4069 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4070 | ptrref_operator cfa_identifier_parameter_declarator_tuple
4071 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4072 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
4073 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4074 ;
4075
4076cfa_identifier_parameter_array: // CFA
4077 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
4078 // shift/reduce conflict with new-style empty (void) function return type.
4079 '[' ']' type_specifier_nobody
4080 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4081 | cfa_array_parameter_1st_dimension type_specifier_nobody
4082 { $$ = $2->addNewArray( $1 ); }
4083 | '[' ']' multi_array_dimension type_specifier_nobody
4084 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4085 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
4086 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4087 | multi_array_dimension type_specifier_nobody
4088 { $$ = $2->addNewArray( $1 ); }
4089
4090 | '[' ']' cfa_identifier_parameter_ptr
4091 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4092 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
4093 { $$ = $2->addNewArray( $1 ); }
4094 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
4095 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4096 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
4097 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
4098 | multi_array_dimension cfa_identifier_parameter_ptr
4099 { $$ = $2->addNewArray( $1 ); }
4100 ;
4101
4102cfa_array_parameter_1st_dimension:
4103 '[' push type_qualifier_list '*' pop ']' // remaining C99
4104 { $$ = DeclarationNode::newVarArray( $3 ); }
4105 | '[' push type_qualifier_list assignment_expression pop ']'
4106 { $$ = DeclarationNode::newArray( $4, $3, false ); }
4107 | '[' push declaration_qualifier_list assignment_expression pop ']'
4108 // declaration_qualifier_list must be used because of shift/reduce conflict with
4109 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
4110 // appear in this context.
4111 { $$ = DeclarationNode::newArray( $4, $3, true ); }
4112 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
4113 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
4114 ;
4115
4116// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
4117// identifier to which the type applies, e.g.:
4118//
4119// [int] f( int ); // abstract variable parameter; no parameter name specified
4120// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
4121//
4122// These rules need LR(3):
4123//
4124// cfa_abstract_tuple identifier_or_type_name
4125// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
4126//
4127// since a function return type can be syntactically identical to a tuple type:
4128//
4129// [int, int] t;
4130// [int, int] f( int );
4131//
4132// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
4133// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
4134// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
4135// duplicated when appearing with cfa_function_specifier.
4136
4137cfa_abstract_declarator_tuple: // CFA
4138 cfa_abstract_tuple
4139 | type_qualifier_list cfa_abstract_tuple
4140 { $$ = $2->addQualifiers( $1 ); }
4141 | cfa_abstract_declarator_no_tuple
4142 ;
4143
4144cfa_abstract_declarator_no_tuple: // CFA
4145 cfa_abstract_ptr
4146 | cfa_abstract_array
4147 ;
4148
4149cfa_abstract_ptr: // CFA
4150 ptrref_operator type_specifier
4151 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4152 | type_qualifier_list ptrref_operator type_specifier
4153 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4154 | ptrref_operator cfa_abstract_function
4155 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4156 | type_qualifier_list ptrref_operator cfa_abstract_function
4157 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4158 | ptrref_operator cfa_abstract_declarator_tuple
4159 { $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
4160 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
4161 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
4162 ;
4163
4164cfa_abstract_array: // CFA
4165 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
4166 // empty (void) function return type.
4167 '[' ']' type_specifier
4168 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4169 | '[' ']' multi_array_dimension type_specifier
4170 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4171 | multi_array_dimension type_specifier
4172 { $$ = $2->addNewArray( $1 ); }
4173 | '[' ']' cfa_abstract_ptr
4174 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4175 | '[' ']' multi_array_dimension cfa_abstract_ptr
4176 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
4177 | multi_array_dimension cfa_abstract_ptr
4178 { $$ = $2->addNewArray( $1 ); }
4179 ;
4180
4181cfa_abstract_tuple: // CFA
4182 '[' push cfa_abstract_parameter_list pop ']'
4183 { $$ = DeclarationNode::newTuple( $3 ); }
4184 | '[' push type_specifier_nobody ELLIPSIS pop ']'
4185 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4186 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
4187 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
4188 ;
4189
4190cfa_abstract_function: // CFA
4191// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
4192// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
4193 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
4194 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4195 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
4196 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
4197 ;
4198
4199// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
4200// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
4201//
4202// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
4203// the declaration specifiers in a declaration is an obsolescent feature."
4204//
4205// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
4206// prototype-format parameter type declarators) is an obsolescent feature."
4207//
4208// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
4209// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
4210
4211// ************************ MISCELLANEOUS ********************************
4212
4213comma_opt: // redundant comma
4214 // empty
4215 | ','
4216 ;
4217
4218default_initializer_opt:
4219 // empty
4220 { $$ = nullptr; }
4221 | '=' assignment_expression
4222 { $$ = $2; }
4223 ;
4224
4225%%
4226
4227// ----end of grammar----
4228
4229// Local Variables: //
4230// mode: c++ //
4231// tab-width: 4 //
4232// compile-command: "make install" //
4233// End: //
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