source: src/Parser/parser.yy@ b859f59

ADT ast-experimental
Last change on this file since b859f59 was 0bd46fd, checked in by Thierry Delisle <tdelisle@…>, 3 years ago

Fixed several warnings
  • Property mode set to 100644
File size: 161.0 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// parser.yy --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat Aug 27 13:21:28 2022
13// Update Count : 5661
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 <stack>
47using namespace std;
48
49#include "SynTree/Declaration.h"
50#include "ParseNode.h"
51#include "TypedefTable.h"
52#include "TypeData.h"
53#include "SynTree/LinkageSpec.h"
54#include "Common/SemanticError.h" // error_str
55#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
56
57#include "SynTree/Attribute.h" // for Attribute
58
59// lex uses __null in a boolean context, it's fine.
60#ifdef __clang__
61#pragma GCC diagnostic ignored "-Wparentheses-equality"
62#endif
63
64extern DeclarationNode * parseTree;
65extern LinkageSpec::Spec linkage;
66extern TypedefTable typedefTable;
67
68stack<LinkageSpec::Spec> linkageStack;
69
70bool appendStr( string & to, string & from ) {
71 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
72 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
73 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
74 // easier to let the C compiler handle this case.
75 //
76 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
77 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
78 // e.g., u"a" U"b" L"c" is disallowed.
79
80 if ( from[0] != '"' ) { // encoding ?
81 if ( to[0] != '"' ) { // encoding ?
82 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
83 yyerror( "non-matching string encodings for string-literal concatenation" );
84 return false; // parse error, must call YYERROR in action
85 } else if ( from[1] == '8' ) {
86 from.erase( 0, 1 ); // remove 2nd encoding
87 } // if
88 } else {
89 if ( from[1] == '8' ) { // move encoding to start
90 to = "u8" + to;
91 from.erase( 0, 1 ); // remove 2nd encoding
92 } else {
93 to = from[0] + to;
94 } // if
95 } // if
96 from.erase( 0, 1 ); // remove 2nd encoding
97 } // if
98 to += " " + from; // concatenated into single string
99 return true;
100} // appendStr
101
102DeclarationNode * distAttr( DeclarationNode * typeSpec, DeclarationNode * declList ) {
103 // distribute declaration_specifier across all declared variables, e.g., static, const, but not __attribute__.
104 assert( declList );
105// printf( "distAttr1 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout );
106 DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( typeSpec );
107// printf( "distAttr2 cl %p\n", cl ); cl->type->print( std::cout );
108// cl->type->aggregate.name = cl->type->aggInst.aggregate->aggregate.name;
109
110 for ( cur = dynamic_cast<DeclarationNode *>( cur->get_next() ); cur != nullptr; cur = dynamic_cast<DeclarationNode *>( cur->get_next() ) ) {
111 cl->cloneBaseType( cur );
112 } // for
113 declList->addType( cl );
114// printf( "distAttr3 declList %p\n", declList ); declList->print( std::cout, 0 );
115 return declList;
116} // distAttr
117
118void distExt( DeclarationNode * declaration ) {
119 // distribute EXTENSION across all declarations
120 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
121 iter->set_extension( true );
122 } // for
123} // distExt
124
125void distInl( DeclarationNode * declaration ) {
126 // distribute INLINE across all declarations
127 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
128 iter->set_inLine( true );
129 } // for
130} // distInl
131
132void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
133 // distribute qualifiers across all non-variable declarations in a distribution statemement
134 for ( DeclarationNode * iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
135 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
136 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
137 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
138 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
139 DeclarationNode * clone = qualifiers->clone();
140 if ( qualifiers->type ) { // forall clause ? (handles SC)
141 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
142 swap( clone->type->forall, iter->type->aggregate.params );
143 iter->addQualifiers( clone );
144 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
145 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
146 DeclarationNode newnode;
147 swap( newnode.type, iter->type->aggInst.aggregate );
148 swap( clone->type->forall, newnode.type->aggregate.params );
149 newnode.addQualifiers( clone );
150 swap( newnode.type, iter->type->aggInst.aggregate );
151 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
152 swap( clone->type->forall, iter->type->forall );
153 iter->addQualifiers( clone );
154 } // if
155 } else { // just SC qualifiers
156 iter->addQualifiers( clone );
157 } // if
158 } // for
159 delete qualifiers;
160} // distQual
161
162// There is an ambiguity for inline generic-routine return-types and generic routines.
163// forall( otype T ) struct S { int i; } bar( T ) {}
164// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
165// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
166// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
167// forall( otype T ) struct S { int T; };
168// forall( otype W ) bar( W ) {}
169
170void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
171 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
172 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
173 declSpec->type->aggregate.params = nullptr;
174 } // if
175} // rebindForall
176
177string * build_postfix_name( string * name ) {
178 *name = string("__postfix_func_") + *name;
179 return name;
180} // build_postfix_name
181
182DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
183 if ( ! fieldList ) { // field declarator ?
184 if ( ! ( typeSpec->type && (typeSpec->type->kind == TypeData::Aggregate || typeSpec->type->kind == TypeData::Enum) ) ) {
185 stringstream ss;
186 // printf( "fieldDecl1 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
187 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
188 return nullptr;
189 } // if
190 // printf( "fieldDecl2 typeSpec %p\n", typeSpec ); typeSpec->type->print( std::cout );
191 fieldList = DeclarationNode::newName( nullptr );
192 } // if
193// return distAttr( typeSpec, fieldList ); // mark all fields in list
194
195 // printf( "fieldDecl3 typeSpec %p\n", typeSpec ); typeSpec->print( std::cout, 0 );
196 DeclarationNode * temp = distAttr( typeSpec, fieldList ); // mark all fields in list
197 // printf( "fieldDecl4 temp %p\n", temp ); temp->print( std::cout, 0 );
198 return temp;
199} // fieldDecl
200
201#define NEW_ZERO new ExpressionNode( build_constantInteger( *new string( "0" ) ) )
202#define NEW_ONE new ExpressionNode( build_constantInteger( *new string( "1" ) ) )
203#define UPDOWN( compop, left, right ) (compop == OperKinds::LThan || compop == OperKinds::LEThan ? left : right)
204#define MISSING_ANON_FIELD "Missing loop fields with an anonymous loop index is meaningless as loop index is unavailable in loop body."
205#define MISSING_LOW "Missing low value for up-to range so index is uninitialized."
206#define MISSING_HIGH "Missing high value for down-to range so index is uninitialized."
207
208ForCtrl * forCtrl( DeclarationNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
209 if ( index->initializer ) {
210 SemanticError( yylloc, "Direct initialization disallowed. Use instead: type var; initialization ~ comparison ~ increment." );
211 } // if
212 if ( index->next ) {
213 SemanticError( yylloc, "Multiple loop indexes disallowed in for-loop declaration." );
214 } // if
215 return new ForCtrl( index->addInitializer( new InitializerNode( start ) ),
216 // NULL comp/inc => leave blank
217 comp ? new ExpressionNode( build_binary_val( compop, new ExpressionNode( build_varref( new string( *index->name ) ) ), comp ) ) : nullptr,
218 inc ? new ExpressionNode( build_binary_val( compop == OperKinds::LThan || compop == OperKinds::LEThan ? // choose += or -= for upto/downto
219 OperKinds::PlusAssn : OperKinds::MinusAssn, new ExpressionNode( build_varref( new string( *index->name ) ) ), inc ) ) : nullptr );
220} // forCtrl
221
222ForCtrl * forCtrl( ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
223 ConstantExpr * constant = dynamic_cast<ConstantExpr *>(type->expr.get());
224 if ( constant && (constant->get_constant()->get_value() == "0" || constant->get_constant()->get_value() == "1") ) {
225 type = new ExpressionNode( new CastExpr( maybeMoveBuild<Expression>(type), new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ) );
226 } // if
227// type = new ExpressionNode( build_func( new ExpressionNode( build_varref( new string( "__for_control_index_constraints__" ) ) ), type ) );
228 return new ForCtrl(
229 distAttr( DeclarationNode::newTypeof( type, true ), DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) ) ),
230 // NULL comp/inc => leave blank
231 comp ? new ExpressionNode( build_binary_val( compop, new ExpressionNode( build_varref( new string( *index ) ) ), comp ) ) : nullptr,
232 inc ? new ExpressionNode( build_binary_val( compop == OperKinds::LThan || compop == OperKinds::LEThan ? // choose += or -= for upto/downto
233 OperKinds::PlusAssn : OperKinds::MinusAssn, new ExpressionNode( build_varref( new string( *index ) ) ), inc ) ) : nullptr );
234} // forCtrl
235
236ForCtrl * forCtrl( ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
237 if ( NameExpr * identifier = dynamic_cast<NameExpr *>(index->expr.get()) ) {
238 return forCtrl( type, new string( identifier->name ), start, compop, comp, inc );
239 } else if ( CommaExpr * commaExpr = dynamic_cast<CommaExpr *>(index->expr.get()) ) {
240 if ( NameExpr * identifier = dynamic_cast<NameExpr *>(commaExpr->arg1 ) ) {
241 return forCtrl( type, new string( identifier->name ), start, compop, comp, inc );
242 } else {
243 SemanticError( yylloc, "Expression disallowed. Only loop-index name allowed." ); return nullptr;
244 } // if
245 } else {
246 SemanticError( yylloc, "Expression disallowed. Only loop-index name allowed." ); return nullptr;
247 } // if
248} // forCtrl
249
250bool forall = false; // aggregate have one or more forall qualifiers ?
251
252// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
253#define YYLLOC_DEFAULT(Cur, Rhs, N) \
254if ( N ) { \
255 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
256 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
257 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
258 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
259 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
260} else { \
261 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
262 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
263 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
264}
265%}
266
267%define parse.error verbose
268
269// Types declaration for productions
270%union {
271 Token tok;
272 ParseNode * pn;
273 ExpressionNode * en;
274 DeclarationNode * decl;
275 AggregateDecl::Aggregate aggKey;
276 TypeDecl::Kind tclass;
277 StatementNode * sn;
278 WaitForStmt * wfs;
279 Expression * constant;
280 CondCtl * ifctl;
281 ForCtrl * fctl;
282 enum OperKinds compop;
283 LabelNode * label;
284 InitializerNode * in;
285 OperKinds op;
286 std::string * str;
287 bool flag;
288 CatchStmt::Kind catch_kind;
289 GenericExpr * genexpr;
290}
291
292//************************* TERMINAL TOKENS ********************************
293
294// keywords
295%token TYPEDEF
296%token EXTERN STATIC AUTO REGISTER
297%token THREADLOCALGCC THREADLOCALC11 // GCC, C11
298%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
299%token NORETURN // C11
300%token CONST VOLATILE
301%token RESTRICT // C99
302%token ATOMIC // C11
303%token FORALL MUTEX VIRTUAL VTABLE COERCE // CFA
304%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
305%token BOOL COMPLEX IMAGINARY // C99
306%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
307%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
308%token DECIMAL32 DECIMAL64 DECIMAL128 // GCC
309%token ZERO_T ONE_T // CFA
310%token SIZEOF TYPEOF VALIST AUTO_TYPE // GCC
311%token OFFSETOF BASETYPEOF TYPEID // CFA
312%token ENUM STRUCT UNION
313%token EXCEPTION // CFA
314%token GENERATOR COROUTINE MONITOR THREAD // CFA
315%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
316// %token RESUME // CFA
317%token LABEL // GCC
318%token SUSPEND // CFA
319%token ATTRIBUTE EXTENSION // GCC
320%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
321%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR // CFA
322%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
323%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
324%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
325
326// names and constants: lexer differentiates between identifier and typedef names
327%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
328%token<tok> TIMEOUT WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
329%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
330%token<tok> DIRECTIVE
331// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
332// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
333// converted into the tuple index (.)(1). e.g., 3.x
334%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
335
336// multi-character operators
337%token ARROW // ->
338%token ICR DECR // ++ --
339%token LS RS // << >>
340%token LE GE EQ NE // <= >= == !=
341%token ANDAND OROR // && ||
342%token ELLIPSIS // ...
343
344%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
345%token PLUSassign MINUSassign // += -=
346%token LSassign RSassign // <<= >>=
347%token ANDassign ERassign ORassign // &= ^= |=
348
349%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
350%token ATassign // @=
351
352%type<tok> identifier identifier_at identifier_or_type_name attr_name
353%type<tok> quasi_keyword
354%type<constant> string_literal
355%type<str> string_literal_list
356
357// expressions
358%type<en> constant
359%type<en> tuple tuple_expression_list
360%type<op> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
361%type<en> primary_expression postfix_expression unary_expression
362%type<en> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
363%type<en> shift_expression relational_expression equality_expression
364%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
365%type<en> logical_AND_expression logical_OR_expression
366%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
367%type<en> comma_expression comma_expression_opt
368%type<en> argument_expression_list_opt argument_expression_list argument_expression default_initializer_opt
369%type<ifctl> conditional_declaration
370%type<fctl> for_control_expression for_control_expression_list
371%type<compop> updown updowneq downupdowneq
372%type<en> subrange
373%type<decl> asm_name_opt
374%type<en> asm_operands_opt asm_operands_list asm_operand
375%type<label> label_list
376%type<en> asm_clobbers_list_opt
377%type<flag> asm_volatile_opt
378%type<en> handler_predicate_opt
379%type<genexpr> generic_association generic_assoc_list
380
381// statements
382%type<sn> statement labeled_statement compound_statement
383%type<sn> statement_decl statement_decl_list statement_list_nodecl
384%type<sn> selection_statement if_statement
385%type<sn> switch_clause_list_opt switch_clause_list
386%type<en> case_value
387%type<sn> case_clause case_value_list case_label case_label_list
388%type<sn> iteration_statement jump_statement
389%type<sn> expression_statement asm_statement
390%type<sn> with_statement
391%type<en> with_clause_opt
392%type<sn> exception_statement handler_clause finally_clause
393%type<catch_kind> handler_key
394%type<sn> mutex_statement
395%type<en> when_clause when_clause_opt waitfor timeout
396%type<sn> waitfor_statement
397%type<wfs> waitfor_clause
398
399// declarations
400%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
401%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
402%type<decl> abstract_parameter_declaration
403
404%type<aggKey> aggregate_key aggregate_data aggregate_control
405%type<decl> aggregate_type aggregate_type_nobody
406
407%type<decl> assertion assertion_list assertion_list_opt
408
409%type<en> bit_subrange_size_opt bit_subrange_size
410
411%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
412%type<decl> vtable vtable_opt default_opt
413
414%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
415
416%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
417%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
418
419%type<decl> elaborated_type elaborated_type_nobody
420
421%type<decl> enumerator_list enum_type enum_type_nobody
422%type<in> enumerator_value_opt
423
424%type<decl> external_definition external_definition_list external_definition_list_opt
425
426%type<decl> exception_declaration
427
428%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
429%type<en> field field_name_list field_name fraction_constants_opt
430
431%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
432
433%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
434%type<decl> identifier_list
435
436%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
437%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
438%type<decl> cfa_abstract_ptr cfa_abstract_tuple
439
440%type<decl> cfa_array_parameter_1st_dimension
441
442%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
443%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
444
445%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
446%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
447
448%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
449
450%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
451
452%type<decl> c_declaration static_assert
453%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
454%type<decl> KR_parameter_list KR_parameter_list_opt
455
456%type<decl> parameter_declaration parameter_list parameter_type_list_opt
457
458%type<decl> paren_identifier paren_type
459
460%type<decl> storage_class storage_class_list
461
462%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
463
464%type<tclass> type_class new_type_class
465%type<decl> type_declarator type_declarator_name type_declaring_list
466
467%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
468%type<decl> typedef_name typedef_declaration typedef_expression
469
470%type<decl> variable_type_redeclarator type_ptr type_array type_function
471
472%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
473
474%type<decl> type type_no_function
475%type<decl> type_parameter type_parameter_list type_initializer_opt
476
477%type<en> type_parameters_opt type_list
478
479%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
480%type<decl> type_specifier type_specifier_nobody
481
482%type<decl> variable_declarator variable_ptr variable_array variable_function
483%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
484
485%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
486
487// initializers
488%type<in> initializer initializer_list_opt initializer_opt
489
490// designators
491%type<en> designator designator_list designation
492
493
494// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
495// .---------. matches IF '(' comma_expression ')' statement . (reduce)
496// if ( C ) S1 else S2
497// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
498// Similar issues exit with the waitfor statement.
499
500// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
501// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
502%precedence THEN // rule precedence for IF/WAITFOR statement
503%precedence WOR // token precedence for start of WOR in WAITFOR statement
504%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
505%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
506%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
507%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
508%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
509%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
510%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
511
512
513// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
514// forall( otype T ) struct Foo { T v; };
515// .-----. matches pointer to function returning a generic (which is impossible without a type)
516// Foo ( *fp )( int );
517// `---' matches start of TYPEGENname '('
518// must be:
519// Foo( int ) ( *fp )( int );
520// The same problem occurs here:
521// forall( otype T ) struct Foo { T v; } ( *fp )( int );
522// must be:
523// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
524
525// Order of these lines matters (low-to-high precedence).
526%precedence TYPEGENname
527%precedence '}'
528%precedence '('
529
530// %precedence RESUME
531// %precedence '{'
532// %precedence ')'
533
534%locations // support location tracking for error messages
535
536%start translation_unit // parse-tree root
537
538%%
539//************************* Namespace Management ********************************
540
541// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
542// which are lexically identical.
543//
544// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
545// foo f; // to allow it to appear in this context
546//
547// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
548// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
549// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
550// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
551// must be distinguished by the lexical scanner.
552//
553// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
554// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
555// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
556// each context that introduces a name scope, a new level is created in the type table and that level is popped on
557// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
558// This requires distinguishing between type names that are local to the current declaration scope and those that
559// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
560//
561// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
562// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
563// around the list separator.
564//
565// int f( forall(T) T (*f1) T , forall( S ) S (*f2)( S ) );
566// push pop push pop
567
568push:
569 { typedefTable.enterScope(); }
570 ;
571
572pop:
573 { typedefTable.leaveScope(); }
574 ;
575
576//************************* CONSTANTS ********************************
577
578constant:
579 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
580 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
581 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
582 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
583 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
584 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
585 ;
586
587quasi_keyword: // CFA
588 TIMEOUT
589 | WOR
590 | CATCH
591 | RECOVER
592 | CATCHRESUME
593 | FIXUP
594 | FINALLY
595 ;
596
597identifier:
598 IDENTIFIER
599 | quasi_keyword
600 ;
601
602identifier_at:
603 identifier
604 | '@' // CFA
605 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
606 ;
607
608string_literal:
609 string_literal_list { $$ = build_constantStr( *$1 ); }
610 ;
611
612string_literal_list: // juxtaposed strings are concatenated
613 STRINGliteral { $$ = $1; } // conversion from tok to str
614 | string_literal_list STRINGliteral
615 {
616 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
617 delete $2; // allocated by lexer
618 $$ = $1; // conversion from tok to str
619 }
620 ;
621
622//************************* EXPRESSIONS ********************************
623
624primary_expression:
625 IDENTIFIER // typedef name cannot be used as a variable name
626 { $$ = new ExpressionNode( build_varref( $1 ) ); }
627 | quasi_keyword
628 { $$ = new ExpressionNode( build_varref( $1 ) ); }
629 | TYPEDIMname // CFA, generic length argument
630 // { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( DeclarationNode::newFromTypedef( $1 ) ) ) ); }
631 // { $$ = new ExpressionNode( build_varref( $1 ) ); }
632 { $$ = new ExpressionNode( build_dimensionref( $1 ) ); }
633 | tuple
634 | '(' comma_expression ')'
635 { $$ = $2; }
636 | '(' compound_statement ')' // GCC, lambda expression
637 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast<CompoundStmt *>(maybeMoveBuild<Statement>($2) ) ) ); }
638 | type_name '.' identifier // CFA, nested type
639 { $$ = new ExpressionNode( build_qualified_expr( $1, build_varref( $3 ) ) ); }
640 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
641 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
642 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
643 {
644 // add the missing control expression to the GenericExpr and return it
645 $5->control = maybeMoveBuild<Expression>( $3 );
646 $$ = new ExpressionNode( $5 );
647 }
648 // | RESUME '(' comma_expression ')'
649 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
650 // | RESUME '(' comma_expression ')' compound_statement
651 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
652 | IDENTIFIER IDENTIFIER // syntax error
653 {
654 SemanticError( yylloc, ::toString( "Adjacent identifiers are not meaningful in an expression. "
655 "Possible problem is identifier \"", *$1.str,
656 "\" is a misspelled typename or an incorrectly specified type name, "
657 "e.g., missing generic parameter or missing struct/union/enum before typename." ) );
658 $$ = nullptr;
659 }
660 | IDENTIFIER direct_type // syntax error
661 {
662 SemanticError( yylloc, ::toString( "Identifier \"", *$1.str, "\" cannot appear before a type. "
663 "Possible problem is misspelled storage or CV qualifier." ) );
664 $$ = nullptr;
665 }
666 ;
667
668generic_assoc_list: // C11
669 generic_association
670 | generic_assoc_list ',' generic_association
671 {
672 // steal the association node from the singleton and delete the wrapper
673 $1->associations.splice($1->associations.end(), $3->associations);
674 delete $3;
675 $$ = $1;
676 }
677 ;
678
679generic_association: // C11
680 type_no_function ':' assignment_expression
681 {
682 // create a GenericExpr wrapper with one association pair
683 $$ = new GenericExpr( nullptr, { { maybeMoveBuildType($1), maybeMoveBuild<Expression>( $3 ) } } );
684 }
685 | DEFAULT ':' assignment_expression
686 { $$ = new GenericExpr( nullptr, { { maybeMoveBuild<Expression>( $3 ) } } ); }
687 ;
688
689postfix_expression:
690 primary_expression
691 | postfix_expression '[' assignment_expression ',' tuple_expression_list ']'
692 // Historic, transitional: Disallow commas in subscripts.
693 // Switching to this behaviour may help check if a C compatibilty case uses comma-exprs in subscripts.
694 // Current: Commas in subscripts make tuples.
695 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, new ExpressionNode( build_tuple( (ExpressionNode *)($3->set_last( $5 ) ) )) ) ); }
696 | postfix_expression '[' assignment_expression ']'
697 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
698 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
699 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
700 // equivalent to the old x[i,j].
701 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
702 | constant '[' assignment_expression ']' // 3[a], 'a'[a], 3.5[a]
703 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
704 | string_literal '[' assignment_expression ']' // "abc"[3], 3["abc"]
705 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, new ExpressionNode( $1 ), $3 ) ); }
706 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
707 {
708 Token fn;
709 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
710 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
711 }
712 | postfix_expression '(' argument_expression_list_opt ')'
713 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
714 | postfix_expression '`' identifier // CFA, postfix call
715 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
716 | constant '`' identifier // CFA, postfix call
717 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
718 | string_literal '`' identifier // CFA, postfix call
719 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), new ExpressionNode( $1 ) ) ); }
720 | postfix_expression '.' identifier
721 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
722 | postfix_expression '.' INTEGERconstant // CFA, tuple index
723 { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); }
724 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
725 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
726 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
727 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
728 | postfix_expression '.' aggregate_control
729 { $$ = new ExpressionNode( build_keyword_cast( $3, $1 ) ); }
730 | postfix_expression ARROW identifier
731 { $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
732 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
733 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
734 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
735 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
736 | postfix_expression ICR
737 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
738 | postfix_expression DECR
739 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
740 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
741 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
742 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
743 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
744 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
745 {
746 Token fn;
747 fn.str = new string( "^?{}" ); // location undefined
748 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
749 }
750 ;
751
752argument_expression_list_opt:
753 // empty
754 { $$ = nullptr; }
755 | argument_expression_list
756 ;
757
758argument_expression_list:
759 argument_expression
760 | argument_expression_list_opt ',' argument_expression
761 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
762 ;
763
764argument_expression:
765 '@' // CFA, default parameter
766 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
767 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
768 | assignment_expression
769 ;
770
771field_name_list: // CFA, tuple field selector
772 field
773 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
774 ;
775
776field: // CFA, tuple field selector
777 field_name
778 | FLOATING_DECIMALconstant field
779 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
780 | FLOATING_DECIMALconstant '[' field_name_list ']'
781 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); }
782 | field_name '.' field
783 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
784 | field_name '.' '[' field_name_list ']'
785 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
786 | field_name ARROW field
787 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
788 | field_name ARROW '[' field_name_list ']'
789 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
790 ;
791
792field_name:
793 INTEGERconstant fraction_constants_opt
794 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
795 | FLOATINGconstant fraction_constants_opt
796 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
797 | identifier_at fraction_constants_opt // CFA, allow anonymous fields
798 {
799 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
800 }
801 ;
802
803fraction_constants_opt:
804 // empty
805 { $$ = nullptr; }
806 | fraction_constants_opt FLOATING_FRACTIONconstant
807 {
808 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
809 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
810 }
811 ;
812
813unary_expression:
814 postfix_expression
815 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
816 // semantics checks, e.g., ++3, 3--, *3, &&3
817 | constant
818 | string_literal
819 { $$ = new ExpressionNode( $1 ); }
820 | EXTENSION cast_expression // GCC
821 { $$ = $2->set_extension( true ); }
822 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
823 // { * X; } // dereference X
824 // { * int X; } // CFA declaration of pointer to int
825 | ptrref_operator cast_expression // CFA
826 {
827 switch ( $1 ) {
828 case OperKinds::AddressOf:
829 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) );
830 break;
831 case OperKinds::PointTo:
832 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
833 break;
834 case OperKinds::And:
835 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) ) );
836 break;
837 default:
838 assert( false );
839 }
840 }
841 | unary_operator cast_expression
842 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
843 | ICR unary_expression
844 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
845 | DECR unary_expression
846 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
847 | SIZEOF unary_expression
848 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
849 | SIZEOF '(' type_no_function ')'
850 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
851 | ALIGNOF unary_expression // GCC, variable alignment
852 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
853 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
854 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
855 | OFFSETOF '(' type_no_function ',' identifier ')'
856 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
857 | TYPEID '(' type_no_function ')'
858 {
859 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
860 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
861 }
862 ;
863
864ptrref_operator:
865 '*' { $$ = OperKinds::PointTo; }
866 | '&' { $$ = OperKinds::AddressOf; }
867 // GCC, address of label must be handled by semantic check for ref,ref,label
868 | ANDAND { $$ = OperKinds::And; }
869 ;
870
871unary_operator:
872 '+' { $$ = OperKinds::UnPlus; }
873 | '-' { $$ = OperKinds::UnMinus; }
874 | '!' { $$ = OperKinds::Neg; }
875 | '~' { $$ = OperKinds::BitNeg; }
876 ;
877
878cast_expression:
879 unary_expression
880 | '(' type_no_function ')' cast_expression
881 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
882 | '(' aggregate_control '&' ')' cast_expression // CFA
883 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
884 | '(' aggregate_control '*' ')' cast_expression // CFA
885 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
886 | '(' VIRTUAL ')' cast_expression // CFA
887 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $4 ), maybeMoveBuildType( nullptr ) ) ); }
888 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
889 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $5 ), maybeMoveBuildType( $3 ) ) ); }
890 | '(' RETURN type_no_function ')' cast_expression // CFA
891 { SemanticError( yylloc, "Return cast is currently unimplemented." ); $$ = nullptr; }
892 | '(' COERCE type_no_function ')' cast_expression // CFA
893 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
894 | '(' qualifier_cast_list ')' cast_expression // CFA
895 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
896// | '(' type_no_function ')' tuple
897// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
898 ;
899
900qualifier_cast_list:
901 cast_modifier type_qualifier_name
902 | cast_modifier MUTEX
903 | qualifier_cast_list cast_modifier type_qualifier_name
904 | qualifier_cast_list cast_modifier MUTEX
905 ;
906
907cast_modifier:
908 '-'
909 | '+'
910 ;
911
912exponential_expression:
913 cast_expression
914 | exponential_expression '\\' cast_expression
915 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
916 ;
917
918multiplicative_expression:
919 exponential_expression
920 | multiplicative_expression '*' exponential_expression
921 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
922 | multiplicative_expression '/' exponential_expression
923 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
924 | multiplicative_expression '%' exponential_expression
925 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
926 ;
927
928additive_expression:
929 multiplicative_expression
930 | additive_expression '+' multiplicative_expression
931 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
932 | additive_expression '-' multiplicative_expression
933 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
934 ;
935
936shift_expression:
937 additive_expression
938 | shift_expression LS additive_expression
939 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
940 | shift_expression RS additive_expression
941 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
942 ;
943
944relational_expression:
945 shift_expression
946 | relational_expression '<' shift_expression
947 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
948 | relational_expression '>' shift_expression
949 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
950 | relational_expression LE shift_expression
951 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
952 | relational_expression GE shift_expression
953 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
954 ;
955
956equality_expression:
957 relational_expression
958 | equality_expression EQ relational_expression
959 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
960 | equality_expression NE relational_expression
961 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
962 ;
963
964AND_expression:
965 equality_expression
966 | AND_expression '&' equality_expression
967 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
968 ;
969
970exclusive_OR_expression:
971 AND_expression
972 | exclusive_OR_expression '^' AND_expression
973 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
974 ;
975
976inclusive_OR_expression:
977 exclusive_OR_expression
978 | inclusive_OR_expression '|' exclusive_OR_expression
979 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
980 ;
981
982logical_AND_expression:
983 inclusive_OR_expression
984 | logical_AND_expression ANDAND inclusive_OR_expression
985 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
986 ;
987
988logical_OR_expression:
989 logical_AND_expression
990 | logical_OR_expression OROR logical_AND_expression
991 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
992 ;
993
994conditional_expression:
995 logical_OR_expression
996 | logical_OR_expression '?' comma_expression ':' conditional_expression
997 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
998 // FIX ME: computes $1 twice
999 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
1000 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
1001 ;
1002
1003constant_expression:
1004 conditional_expression
1005 ;
1006
1007assignment_expression:
1008 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
1009 conditional_expression
1010 | unary_expression assignment_operator assignment_expression
1011 {
1012// if ( $2 == OperKinds::AtAssn ) {
1013// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
1014// } else {
1015 $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) );
1016// } // if
1017 }
1018 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
1019 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
1020 ;
1021
1022assignment_expression_opt:
1023 // empty
1024 { $$ = nullptr; }
1025 | assignment_expression
1026 ;
1027
1028assignment_operator:
1029 simple_assignment_operator
1030 | compound_assignment_operator
1031 ;
1032
1033simple_assignment_operator:
1034 '=' { $$ = OperKinds::Assign; }
1035 | ATassign { $$ = OperKinds::AtAssn; } // CFA
1036 ;
1037
1038compound_assignment_operator:
1039 EXPassign { $$ = OperKinds::ExpAssn; }
1040 | MULTassign { $$ = OperKinds::MulAssn; }
1041 | DIVassign { $$ = OperKinds::DivAssn; }
1042 | MODassign { $$ = OperKinds::ModAssn; }
1043 | PLUSassign { $$ = OperKinds::PlusAssn; }
1044 | MINUSassign { $$ = OperKinds::MinusAssn; }
1045 | LSassign { $$ = OperKinds::LSAssn; }
1046 | RSassign { $$ = OperKinds::RSAssn; }
1047 | ANDassign { $$ = OperKinds::AndAssn; }
1048 | ERassign { $$ = OperKinds::ERAssn; }
1049 | ORassign { $$ = OperKinds::OrAssn; }
1050 ;
1051
1052tuple: // CFA, tuple
1053 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
1054 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
1055// '[' ']'
1056// { $$ = new ExpressionNode( build_tuple() ); }
1057// | '[' push assignment_expression pop ']'
1058// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
1059 '[' ',' tuple_expression_list ']'
1060 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
1061 | '[' push assignment_expression pop ',' tuple_expression_list ']'
1062 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)($3->set_last( $6 ) ) )); }
1063 ;
1064
1065tuple_expression_list:
1066 assignment_expression
1067 | '@' // CFA
1068 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1069 | tuple_expression_list ',' assignment_expression
1070 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1071 | tuple_expression_list ',' '@'
1072 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1073 ;
1074
1075comma_expression:
1076 assignment_expression
1077 | comma_expression ',' assignment_expression
1078 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1079 ;
1080
1081comma_expression_opt:
1082 // empty
1083 { $$ = nullptr; }
1084 | comma_expression
1085 ;
1086
1087//*************************** STATEMENTS *******************************
1088
1089statement:
1090 labeled_statement
1091 | compound_statement
1092 | expression_statement
1093 | selection_statement
1094 | iteration_statement
1095 | jump_statement
1096 | with_statement
1097 | mutex_statement
1098 | waitfor_statement
1099 | exception_statement
1100 | enable_disable_statement
1101 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1102 | asm_statement
1103 | DIRECTIVE
1104 { $$ = new StatementNode( build_directive( $1 ) ); }
1105 ;
1106
1107labeled_statement:
1108 // labels cannot be identifiers 0 or 1
1109 identifier_or_type_name ':' attribute_list_opt statement
1110 { $$ = $4->add_label( $1, $3 ); }
1111 | identifier_or_type_name ':' attribute_list_opt error // syntax error
1112 {
1113 SemanticError( yylloc, ::toString( "Label \"", *$1.str, "\" must be associated with a statement, "
1114 "where a declaration, case, or default is not a statement. "
1115 "Move the label or terminate with a semi-colon." ) );
1116 $$ = nullptr;
1117 }
1118 ;
1119
1120compound_statement:
1121 '{' '}'
1122 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
1123 | '{' push
1124 local_label_declaration_opt // GCC, local labels appear at start of block
1125 statement_decl_list // C99, intermix declarations and statements
1126 pop '}'
1127 { $$ = new StatementNode( build_compound( $4 ) ); }
1128 ;
1129
1130statement_decl_list: // C99
1131 statement_decl
1132 | statement_decl_list statement_decl
1133 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1134 ;
1135
1136statement_decl:
1137 declaration // CFA, new & old style declarations
1138 { $$ = new StatementNode( $1 ); }
1139 | EXTENSION declaration // GCC
1140 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1141 | function_definition
1142 { $$ = new StatementNode( $1 ); }
1143 | EXTENSION function_definition // GCC
1144 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1145 | statement
1146 ;
1147
1148statement_list_nodecl:
1149 statement
1150 | statement_list_nodecl statement
1151 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1152 | statement_list_nodecl error // syntax error
1153 { SemanticError( yylloc, "Declarations only allowed at the start of the switch body, i.e., after the '{'." ); $$ = nullptr; }
1154 ;
1155
1156expression_statement:
1157 comma_expression_opt ';'
1158 { $$ = new StatementNode( build_expr( $1 ) ); }
1159 | MUTEX '(' ')' comma_expression ';'
1160 { $$ = new StatementNode( build_mutex( nullptr, new StatementNode( build_expr( $4 ) ) ) ); }
1161 ;
1162
1163selection_statement:
1164 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
1165 // the inherent S/R conflict with THEN/ELSE.
1166 push if_statement pop
1167 { $$ = $2; }
1168 | SWITCH '(' comma_expression ')' case_clause
1169 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
1170 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1171 {
1172 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
1173 // The semantics of the declaration list is changed to include associated initialization, which is performed
1174 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1175 // statement around the switch. Statements after the initial declaration list can never be executed, and
1176 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1177 // statement.
1178 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1179 }
1180 | SWITCH '(' comma_expression ')' '{' error '}' // CFA, syntax error
1181 { SemanticError( yylloc, "Only declarations can appear before the list of case clauses." ); $$ = nullptr; }
1182 | CHOOSE '(' comma_expression ')' case_clause // CFA
1183 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
1184 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1185 {
1186 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
1187 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1188 }
1189 | CHOOSE '(' comma_expression ')' '{' error '}' // CFA, syntax error
1190 { SemanticError( yylloc, "Only declarations can appear before the list of case clauses." ); $$ = nullptr; }
1191 ;
1192
1193if_statement:
1194 IF '(' conditional_declaration ')' statement %prec THEN
1195 // explicitly deal with the shift/reduce conflict on if/else
1196 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), nullptr ) ); }
1197 | IF '(' conditional_declaration ')' statement ELSE statement
1198 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), maybe_build_compound( $7 ) ) ); }
1199 ;
1200
1201conditional_declaration:
1202 comma_expression
1203 { $$ = new CondCtl( nullptr, $1 ); }
1204 | c_declaration // no semi-colon
1205 { $$ = new CondCtl( $1, nullptr ); }
1206 | cfa_declaration // no semi-colon
1207 { $$ = new CondCtl( $1, nullptr ); }
1208 | declaration comma_expression // semi-colon separated
1209 { $$ = new CondCtl( $1, $2 ); }
1210 ;
1211
1212// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1213// clause allows a list of values and subranges.
1214
1215case_value: // CFA
1216 constant_expression { $$ = $1; }
1217 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1218 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1219 | subrange // CFA, subrange
1220 ;
1221
1222case_value_list: // CFA
1223 case_value { $$ = new StatementNode( build_case( $1 ) ); }
1224 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1225 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
1226 ;
1227
1228case_label: // CFA
1229 CASE error // syntax error
1230 { SemanticError( yylloc, "Missing case list after case." ); $$ = nullptr; }
1231 | CASE case_value_list ':' { $$ = $2; }
1232 | CASE case_value_list error // syntax error
1233 { SemanticError( yylloc, "Missing colon after case list." ); $$ = nullptr; }
1234 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
1235 // A semantic check is required to ensure only one default clause per switch/choose statement.
1236 | DEFAULT error // syntax error
1237 { SemanticError( yylloc, "Missing colon after default." ); $$ = nullptr; }
1238 ;
1239
1240case_label_list: // CFA
1241 case_label
1242 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
1243 ;
1244
1245case_clause: // CFA
1246 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( $2 ) ); }
1247 ;
1248
1249switch_clause_list_opt: // CFA
1250 // empty
1251 { $$ = nullptr; }
1252 | switch_clause_list
1253 ;
1254
1255switch_clause_list: // CFA
1256 case_label_list statement_list_nodecl
1257 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1258 | switch_clause_list case_label_list statement_list_nodecl
1259 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
1260 ;
1261
1262iteration_statement:
1263 WHILE '(' ')' statement %prec THEN // CFA => while ( 1 )
1264 { $$ = new StatementNode( build_while( new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( $4 ) ) ); }
1265 | WHILE '(' ')' statement ELSE statement // CFA
1266 {
1267 $$ = new StatementNode( build_while( new CondCtl( nullptr, NEW_ONE ), maybe_build_compound( $4 ) ) );
1268 SemanticWarning( yylloc, Warning::SuperfluousElse, "" );
1269 }
1270 | WHILE '(' conditional_declaration ')' statement %prec THEN
1271 { $$ = new StatementNode( build_while( $3, maybe_build_compound( $5 ) ) ); }
1272 | WHILE '(' conditional_declaration ')' statement ELSE statement // CFA
1273 { $$ = new StatementNode( build_while( $3, maybe_build_compound( $5 ), $7 ) ); }
1274 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1275 { $$ = new StatementNode( build_do_while( NEW_ONE, maybe_build_compound( $2 ) ) ); }
1276 | DO statement WHILE '(' ')' ELSE statement // CFA
1277 {
1278 $$ = new StatementNode( build_do_while( NEW_ONE, maybe_build_compound( $2 ) ) );
1279 SemanticWarning( yylloc, Warning::SuperfluousElse, "" );
1280 }
1281 | DO statement WHILE '(' comma_expression ')' ';'
1282 { $$ = new StatementNode( build_do_while( $5, maybe_build_compound( $2 ) ) ); }
1283 | DO statement WHILE '(' comma_expression ')' ELSE statement // CFA
1284 { $$ = new StatementNode( build_do_while( $5, maybe_build_compound( $2 ), $8 ) ); }
1285 | FOR '(' ')' statement %prec THEN // CFA => for ( ;; )
1286 { $$ = new StatementNode( build_for( new ForCtrl( (ExpressionNode * )nullptr, (ExpressionNode * )nullptr, (ExpressionNode * )nullptr ), maybe_build_compound( $4 ) ) ); }
1287 | FOR '(' ')' statement ELSE statement // CFA
1288 {
1289 $$ = new StatementNode( build_for( new ForCtrl( (ExpressionNode * )nullptr, (ExpressionNode * )nullptr, (ExpressionNode * )nullptr ), maybe_build_compound( $4 ) ) );
1290 SemanticWarning( yylloc, Warning::SuperfluousElse, "" );
1291 }
1292 | FOR '(' for_control_expression_list ')' statement %prec THEN
1293 { $$ = new StatementNode( build_for( $3, maybe_build_compound( $5 ) ) ); }
1294 | FOR '(' for_control_expression_list ')' statement ELSE statement // CFA
1295 { $$ = new StatementNode( build_for( $3, maybe_build_compound( $5 ), $7 ) ); }
1296 ;
1297
1298for_control_expression_list:
1299 for_control_expression
1300 | for_control_expression_list ':' for_control_expression
1301 // ForCtrl + ForCtrl:
1302 // init + init => multiple declaration statements that are hoisted
1303 // condition + condition => (expression) && (expression)
1304 // change + change => (expression), (expression)
1305 {
1306 $1->init->set_last( $3->init );
1307 if ( $1->condition ) {
1308 if ( $3->condition ) {
1309 $1->condition->expr.reset( new LogicalExpr( $1->condition->expr.release(), $3->condition->expr.release(), true ) );
1310 } // if
1311 } else $1->condition = $3->condition;
1312 if ( $1->change ) {
1313 if ( $3->change ) {
1314 $1->change->expr.reset( new CommaExpr( $1->change->expr.release(), $3->change->expr.release() ) );
1315 } // if
1316 } else $1->change = $3->change;
1317 $$ = $1;
1318 }
1319 ;
1320
1321for_control_expression:
1322 ';' comma_expression_opt ';' comma_expression_opt
1323 { $$ = new ForCtrl( (ExpressionNode * )nullptr, $2, $4 ); }
1324 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1325 { $$ = new ForCtrl( $1, $3, $5 ); }
1326 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1327 { $$ = new ForCtrl( $1, $2, $4 ); }
1328
1329 | '@' ';' comma_expression // CFA, empty loop-index
1330 { $$ = new ForCtrl( (ExpressionNode *)nullptr, $3, nullptr ); }
1331 | '@' ';' comma_expression ';' comma_expression // CFA, empty loop-index
1332 { $$ = new ForCtrl( (ExpressionNode *)nullptr, $3, $5 ); }
1333
1334 | comma_expression // CFA, anonymous loop-index
1335 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), NEW_ZERO, OperKinds::LThan, $1->clone(), NEW_ONE ); }
1336 | downupdowneq comma_expression // CFA, anonymous loop-index
1337 { $$ = forCtrl( $2, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $1, NEW_ZERO, $2->clone() ), $1, UPDOWN( $1, $2->clone(), NEW_ZERO ), NEW_ONE ); }
1338
1339 | comma_expression updowneq comma_expression // CFA, anonymous loop-index
1340 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), NEW_ONE ); }
1341 | '@' updowneq comma_expression // CFA, anonymous loop-index
1342 {
1343 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1344 else $$ = forCtrl( $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, NEW_ONE );
1345 }
1346 | comma_expression updowneq '@' // CFA, anonymous loop-index
1347 {
1348 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1349 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1350 }
1351 | comma_expression updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1352 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), UPDOWN( $2, $1->clone(), $3 ), $2, UPDOWN( $2, $3->clone(), $1->clone() ), $5 ); }
1353 | '@' updowneq comma_expression '~' comma_expression // CFA, anonymous loop-index
1354 {
1355 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1356 else $$ = forCtrl( $3, new string( DeclarationNode::anonymous.newName() ), $3->clone(), $2, nullptr, $5 );
1357 }
1358 | comma_expression updowneq '@' '~' comma_expression // CFA, anonymous loop-index
1359 {
1360 if ( $2 == OperKinds::LThan || $2 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1361 else { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1362 }
1363 | comma_expression updowneq comma_expression '~' '@' // CFA, error
1364 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1365 | '@' updowneq '@' // CFA, error
1366 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1367 | '@' updowneq comma_expression '~' '@' // CFA, error
1368 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1369 | comma_expression updowneq '@' '~' '@' // CFA, error
1370 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1371 | '@' updowneq '@' '~' '@' // CFA, error
1372 { SemanticError( yylloc, MISSING_ANON_FIELD ); $$ = nullptr; }
1373
1374 | comma_expression ';' comma_expression // CFA
1375 { $$ = forCtrl( $3, $1, NEW_ZERO, OperKinds::LThan, $3->clone(), NEW_ONE ); }
1376 | comma_expression ';' downupdowneq comma_expression // CFA
1377 { $$ = forCtrl( $4, $1, UPDOWN( $3, NEW_ZERO, $4->clone() ), $3, UPDOWN( $3, $4->clone(), NEW_ZERO ), NEW_ONE ); }
1378
1379 | comma_expression ';' comma_expression updowneq comma_expression // CFA
1380 { $$ = forCtrl( $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), NEW_ONE ); }
1381 | comma_expression ';' '@' updowneq comma_expression // CFA
1382 {
1383 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1384 else $$ = forCtrl( $5, $1, $5->clone(), $4, nullptr, NEW_ONE );
1385 }
1386 | comma_expression ';' comma_expression updowneq '@' // CFA
1387 {
1388 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1389 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1390 else $$ = forCtrl( $3, $1, $3->clone(), $4, nullptr, NEW_ONE );
1391 }
1392 | comma_expression ';' '@' updowneq '@' // CFA, error
1393 { SemanticError( yylloc, "Missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1394
1395 | comma_expression ';' comma_expression updowneq comma_expression '~' comma_expression // CFA
1396 { $$ = forCtrl( $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), $7 ); }
1397 | comma_expression ';' '@' updowneq comma_expression '~' comma_expression // CFA, error
1398 {
1399 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1400 else $$ = forCtrl( $5, $1, $5->clone(), $4, nullptr, $7 );
1401 }
1402 | comma_expression ';' comma_expression updowneq '@' '~' comma_expression // CFA
1403 {
1404 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1405 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1406 else $$ = forCtrl( $3, $1, $3->clone(), $4, nullptr, $7 );
1407 }
1408 | comma_expression ';' comma_expression updowneq comma_expression '~' '@' // CFA
1409 { $$ = forCtrl( $3, $1, UPDOWN( $4, $3->clone(), $5 ), $4, UPDOWN( $4, $5->clone(), $3->clone() ), nullptr ); }
1410 | comma_expression ';' '@' updowneq comma_expression '~' '@' // CFA, error
1411 {
1412 if ( $4 == OperKinds::LThan || $4 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1413 else $$ = forCtrl( $5, $1, $5->clone(), $4, nullptr, nullptr );
1414 }
1415 | comma_expression ';' comma_expression updowneq '@' '~' '@' // CFA
1416 {
1417 if ( $4 == OperKinds::GThan || $4 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1418 else if ( $4 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1419 else $$ = forCtrl( $3, $1, $3->clone(), $4, nullptr, nullptr );
1420 }
1421 | comma_expression ';' '@' updowneq '@' '~' '@' // CFA
1422 { SemanticError( yylloc, "Missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1423
1424 | declaration comma_expression // CFA
1425 { $$ = forCtrl( $1, NEW_ZERO, OperKinds::LThan, $2, NEW_ONE ); }
1426 | declaration downupdowneq comma_expression // CFA
1427 { $$ = forCtrl( $1, UPDOWN( $2, NEW_ZERO, $3 ), $2, UPDOWN( $2, $3->clone(), NEW_ZERO ), NEW_ONE ); }
1428
1429 | declaration comma_expression updowneq comma_expression // CFA
1430 { $$ = forCtrl( $1, UPDOWN( $3, $2->clone(), $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), NEW_ONE ); }
1431 | declaration '@' updowneq comma_expression // CFA
1432 {
1433 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1434 else $$ = forCtrl( $1, $4, $3, nullptr, NEW_ONE );
1435 }
1436 | declaration comma_expression updowneq '@' // CFA
1437 {
1438 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1439 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1440 else $$ = forCtrl( $1, $2, $3, nullptr, NEW_ONE );
1441 }
1442
1443 | declaration comma_expression updowneq comma_expression '~' comma_expression // CFA
1444 { $$ = forCtrl( $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), $6 ); }
1445 | declaration '@' updowneq comma_expression '~' comma_expression // CFA
1446 {
1447 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1448 else $$ = forCtrl( $1, $4, $3, nullptr, $6 );
1449 }
1450 | declaration comma_expression updowneq '@' '~' comma_expression // CFA
1451 {
1452 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1453 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1454 else $$ = forCtrl( $1, $2, $3, nullptr, $6 );
1455 }
1456 | declaration comma_expression updowneq comma_expression '~' '@' // CFA
1457 { $$ = forCtrl( $1, UPDOWN( $3, $2, $4 ), $3, UPDOWN( $3, $4->clone(), $2->clone() ), nullptr ); }
1458 | declaration '@' updowneq comma_expression '~' '@' // CFA
1459 {
1460 if ( $3 == OperKinds::LThan || $3 == OperKinds::LEThan ) { SemanticError( yylloc, MISSING_LOW ); $$ = nullptr; }
1461 else $$ = forCtrl( $1, $4, $3, nullptr, nullptr );
1462 }
1463 | declaration comma_expression updowneq '@' '~' '@' // CFA
1464 {
1465 if ( $3 == OperKinds::GThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, MISSING_HIGH ); $$ = nullptr; }
1466 else if ( $3 == OperKinds::LEThan ) { SemanticError( yylloc, "Equality with missing high value is meaningless. Use \"~\"." ); $$ = nullptr; }
1467 else $$ = forCtrl( $1, $2, $3, nullptr, nullptr );
1468 }
1469 | declaration '@' updowneq '@' '~' '@' // CFA, error
1470 { SemanticError( yylloc, "Missing low/high value for up/down-to range so index is uninitialized." ); $$ = nullptr; }
1471
1472 | comma_expression ';' TYPEDEFname // CFA, array type
1473 {
1474 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1475 //$$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1476 }
1477 | comma_expression ';' downupdowneq TYPEDEFname // CFA, array type
1478 {
1479 if ( $3 == OperKinds::LEThan || $3 == OperKinds::GEThan ) { SemanticError( yylloc, "All enumation ranges are equal (all values). Remove \"=~\"." ); $$ = nullptr; }
1480 SemanticError( yylloc, "Type iterator is currently unimplemented." ); $$ = nullptr;
1481 }
1482 ;
1483
1484downupdowneq:
1485 ErangeDown
1486 { $$ = OperKinds::GThan; }
1487 | ErangeUpEq
1488 { $$ = OperKinds::LEThan; }
1489 | ErangeDownEq
1490 { $$ = OperKinds::GEThan; }
1491 ;
1492
1493updown:
1494 '~'
1495 { $$ = OperKinds::LThan; }
1496 | ErangeDown
1497 { $$ = OperKinds::GThan; }
1498 ;
1499
1500updowneq:
1501 updown
1502 | ErangeUpEq
1503 { $$ = OperKinds::LEThan; }
1504 | ErangeDownEq
1505 { $$ = OperKinds::GEThan; }
1506 ;
1507
1508jump_statement:
1509 GOTO identifier_or_type_name ';'
1510 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1511 | GOTO '*' comma_expression ';' // GCC, computed goto
1512 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1513 // whereas normal operator precedence yields goto (*i)+3;
1514 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1515 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1516 | fall_through_name ';' // CFA
1517 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1518 | fall_through_name identifier_or_type_name ';' // CFA
1519 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1520 | fall_through_name DEFAULT ';' // CFA
1521 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1522 | CONTINUE ';'
1523 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1524 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1525 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1526 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1527 // the target of the transfer appears only at the start of an iteration statement.
1528 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1529 | BREAK ';'
1530 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1531 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1532 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1533 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1534 // the target of the transfer appears only at the start of an iteration statement.
1535 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1536 | RETURN comma_expression_opt ';'
1537 { $$ = new StatementNode( build_return( $2 ) ); }
1538 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1539 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1540 | SUSPEND ';'
1541 { $$ = new StatementNode( build_suspend( nullptr ) ); }
1542 | SUSPEND compound_statement
1543 { $$ = new StatementNode( build_suspend( $2 ) ); }
1544 | SUSPEND COROUTINE ';'
1545 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Coroutine ) ); }
1546 | SUSPEND COROUTINE compound_statement
1547 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Coroutine ) ); }
1548 | SUSPEND GENERATOR ';'
1549 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Generator ) ); }
1550 | SUSPEND GENERATOR compound_statement
1551 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Generator ) ); }
1552 | THROW assignment_expression_opt ';' // handles rethrow
1553 { $$ = new StatementNode( build_throw( $2 ) ); }
1554 | THROWRESUME assignment_expression_opt ';' // handles reresume
1555 { $$ = new StatementNode( build_resume( $2 ) ); }
1556 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1557 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1558 ;
1559
1560fall_through_name: // CFA
1561 FALLTHRU
1562 | FALLTHROUGH
1563 ;
1564
1565with_statement:
1566 WITH '(' tuple_expression_list ')' statement
1567 { $$ = new StatementNode( build_with( $3, $5 ) ); }
1568 ;
1569
1570// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1571mutex_statement:
1572 MUTEX '(' argument_expression_list ')' statement
1573 { $$ = new StatementNode( build_mutex( $3, $5 ) ); }
1574 ;
1575
1576when_clause:
1577 WHEN '(' comma_expression ')' { $$ = $3; }
1578 ;
1579
1580when_clause_opt:
1581 // empty
1582 { $$ = nullptr; }
1583 | when_clause
1584 ;
1585
1586waitfor:
1587 WAITFOR '(' cast_expression ')'
1588 { $$ = $3; }
1589// | WAITFOR '(' cast_expression ',' argument_expression_list_opt ')'
1590// { $$ = (ExpressionNode *)$3->set_last( $5 ); }
1591 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1592 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1593 ;
1594
1595cast_expression_list:
1596 cast_expression
1597 | cast_expression_list ',' cast_expression
1598 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1599 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1600 ;
1601
1602timeout:
1603 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1604 ;
1605
1606waitfor_clause:
1607 when_clause_opt waitfor statement %prec THEN
1608 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1 ); }
1609 | when_clause_opt waitfor statement WOR waitfor_clause
1610 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1, $5 ); }
1611 | when_clause_opt timeout statement %prec THEN
1612 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1 ); }
1613 | when_clause_opt ELSE statement
1614 { $$ = build_waitfor_timeout( nullptr, maybe_build_compound( $3 ), $1 ); }
1615 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1616 | when_clause_opt timeout statement WOR ELSE statement // syntax error
1617 { SemanticError( yylloc, "else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1618 | when_clause_opt timeout statement WOR when_clause ELSE statement
1619 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1, maybe_build_compound( $7 ), $5 ); }
1620 ;
1621
1622waitfor_statement:
1623 when_clause_opt waitfor statement %prec THEN
1624 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1625 | when_clause_opt waitfor statement WOR waitfor_clause
1626 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1627 ;
1628
1629exception_statement:
1630 TRY compound_statement handler_clause %prec THEN
1631 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1632 | TRY compound_statement finally_clause
1633 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1634 | TRY compound_statement handler_clause finally_clause
1635 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1636 ;
1637
1638handler_clause:
1639 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1640 { $$ = new StatementNode( build_catch( $1, $4, $6, $8 ) ); }
1641 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1642 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $5, $7, $9 ) ) ); }
1643 ;
1644
1645handler_predicate_opt:
1646 // empty
1647 { $$ = nullptr; }
1648 | ';' conditional_expression { $$ = $2; }
1649 ;
1650
1651handler_key:
1652 CATCH { $$ = CatchStmt::Terminate; }
1653 | RECOVER { $$ = CatchStmt::Terminate; }
1654 | CATCHRESUME { $$ = CatchStmt::Resume; }
1655 | FIXUP { $$ = CatchStmt::Resume; }
1656 ;
1657
1658finally_clause:
1659 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1660 ;
1661
1662exception_declaration:
1663 // No SUE declaration in parameter list.
1664 type_specifier_nobody
1665 | type_specifier_nobody declarator
1666 { $$ = $2->addType( $1 ); }
1667 | type_specifier_nobody variable_abstract_declarator
1668 { $$ = $2->addType( $1 ); }
1669 | cfa_abstract_declarator_tuple identifier // CFA
1670 { $$ = $1->addName( $2 ); }
1671 | cfa_abstract_declarator_tuple // CFA
1672 ;
1673
1674enable_disable_statement:
1675 enable_disable_key identifier_list compound_statement
1676 ;
1677
1678enable_disable_key:
1679 ENABLE
1680 | DISABLE
1681 ;
1682
1683asm_statement:
1684 ASM asm_volatile_opt '(' string_literal ')' ';'
1685 { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
1686 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1687 { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
1688 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1689 { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); }
1690 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1691 { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
1692 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1693 { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
1694 ;
1695
1696asm_volatile_opt: // GCC
1697 // empty
1698 { $$ = false; }
1699 | VOLATILE
1700 { $$ = true; }
1701 ;
1702
1703asm_operands_opt: // GCC
1704 // empty
1705 { $$ = nullptr; } // use default argument
1706 | asm_operands_list
1707 ;
1708
1709asm_operands_list: // GCC
1710 asm_operand
1711 | asm_operands_list ',' asm_operand
1712 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1713 ;
1714
1715asm_operand: // GCC
1716 string_literal '(' constant_expression ')'
1717 { $$ = new ExpressionNode( new AsmExpr( nullptr, $1, maybeMoveBuild<Expression>( $3 ) ) ); }
1718 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1719 { $$ = new ExpressionNode( new AsmExpr( $2, $4, maybeMoveBuild<Expression>( $6 ) ) ); }
1720 ;
1721
1722asm_clobbers_list_opt: // GCC
1723 // empty
1724 { $$ = nullptr; } // use default argument
1725 | string_literal
1726 { $$ = new ExpressionNode( $1 ); }
1727 | asm_clobbers_list_opt ',' string_literal
1728 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( $3 ) )); }
1729 ;
1730
1731label_list:
1732 identifier
1733 {
1734 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1735 delete $1; // allocated by lexer
1736 }
1737 | label_list ',' identifier
1738 {
1739 $$ = $1; $1->labels.push_back( *$3 );
1740 delete $3; // allocated by lexer
1741 }
1742 ;
1743
1744//******************************* DECLARATIONS *********************************
1745
1746declaration_list_opt: // used at beginning of switch statement
1747 // empty
1748 { $$ = nullptr; }
1749 | declaration_list
1750 ;
1751
1752declaration_list:
1753 declaration
1754 | declaration_list declaration
1755 { $$ = $1->appendList( $2 ); }
1756 ;
1757
1758KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1759 // empty
1760 { $$ = nullptr; }
1761 | KR_parameter_list
1762 ;
1763
1764KR_parameter_list:
1765 push c_declaration pop ';'
1766 { $$ = $2; }
1767 | KR_parameter_list push c_declaration pop ';'
1768 { $$ = $1->appendList( $3 ); }
1769 ;
1770
1771local_label_declaration_opt: // GCC, local label
1772 // empty
1773 | local_label_declaration_list
1774 ;
1775
1776local_label_declaration_list: // GCC, local label
1777 LABEL local_label_list ';'
1778 | local_label_declaration_list LABEL local_label_list ';'
1779 ;
1780
1781local_label_list: // GCC, local label
1782 identifier_or_type_name
1783 | local_label_list ',' identifier_or_type_name
1784 ;
1785
1786declaration: // old & new style declarations
1787 c_declaration ';'
1788 {
1789 // printf( "C_DECLARATION1 %p %s\n", $$, $$->name ? $$->name->c_str() : "(nil)" );
1790 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
1791 // printf( "\tattr %s\n", attr->name.c_str() );
1792 // } // for
1793 }
1794 | cfa_declaration ';' // CFA
1795 | static_assert // C11
1796 ;
1797
1798static_assert:
1799 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1800 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
1801 | STATICASSERT '(' constant_expression ')' ';' // CFA
1802 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( *new string( "\"\"" ) ) ); }
1803
1804// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1805// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1806// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1807// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1808// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1809// block, but cannot be mixed within a specific declaration.
1810//
1811// CFA C
1812// [10] int x; int x[10]; // array of 10 integers
1813// [10] * char y; char *y[10]; // array of 10 pointers to char
1814
1815cfa_declaration: // CFA
1816 cfa_variable_declaration
1817 | cfa_typedef_declaration
1818 | cfa_function_declaration
1819 | type_declaring_list
1820 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1821 | trait_specifier
1822 ;
1823
1824cfa_variable_declaration: // CFA
1825 cfa_variable_specifier initializer_opt
1826 { $$ = $1->addInitializer( $2 ); }
1827 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1828 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1829 // them as a type_qualifier cannot appear in that context.
1830 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
1831 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1832 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
1833 ;
1834
1835cfa_variable_specifier: // CFA
1836 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1837 // storage-class
1838 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1839 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1840 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1841 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1842 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1843 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
1844 ;
1845
1846cfa_function_declaration: // CFA
1847 cfa_function_specifier
1848 | type_qualifier_list cfa_function_specifier
1849 { $$ = $2->addQualifiers( $1 ); }
1850 | declaration_qualifier_list cfa_function_specifier
1851 { $$ = $2->addQualifiers( $1 ); }
1852 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1853 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
1854 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
1855 {
1856 // Append the return type at the start (left-hand-side) to each identifier in the list.
1857 DeclarationNode * ret = new DeclarationNode;
1858 ret->type = maybeClone( $1->type->base );
1859 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
1860 }
1861 ;
1862
1863cfa_function_specifier: // CFA
1864// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
1865// {
1866// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1867// }
1868// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
1869// {
1870// typedefTable.setNextIdentifier( *$5 );
1871// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1872// }
1873// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
1874// {
1875// typedefTable.setNextIdentifier( *$5 );
1876// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1877// }
1878// | '[' ']' typegen_name
1879 // identifier_or_type_name must be broken apart because of the sequence:
1880 //
1881 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
1882 // '[' ']' type_specifier
1883 //
1884 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1885 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1886 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1887 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1888 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1889 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1890 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1891 ;
1892
1893cfa_function_return: // CFA
1894 '[' push cfa_parameter_list pop ']'
1895 { $$ = DeclarationNode::newTuple( $3 ); }
1896 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1897 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
1898 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1899 ;
1900
1901cfa_typedef_declaration: // CFA
1902 TYPEDEF cfa_variable_specifier
1903 {
1904 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "1" );
1905 $$ = $2->addTypedef();
1906 }
1907 | TYPEDEF cfa_function_specifier
1908 {
1909 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "2" );
1910 $$ = $2->addTypedef();
1911 }
1912 | cfa_typedef_declaration pop ',' push identifier
1913 {
1914 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "3" );
1915 $$ = $1->appendList( $1->cloneType( $5 ) );
1916 }
1917 ;
1918
1919// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1920// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1921
1922typedef_declaration:
1923 TYPEDEF type_specifier declarator
1924 {
1925 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "4" );
1926 $$ = $3->addType( $2 )->addTypedef();
1927 }
1928 | typedef_declaration pop ',' push declarator
1929 {
1930 typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname, "5" );
1931 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1932 }
1933 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1934 {
1935 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "6" );
1936 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1937 }
1938 | type_specifier TYPEDEF declarator
1939 {
1940 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "7" );
1941 $$ = $3->addType( $1 )->addTypedef();
1942 }
1943 | type_specifier TYPEDEF type_qualifier_list declarator
1944 {
1945 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "8" );
1946 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1947 }
1948 ;
1949
1950typedef_expression:
1951 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1952 TYPEDEF identifier '=' assignment_expression
1953 {
1954 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1955 }
1956 | typedef_expression pop ',' push identifier '=' assignment_expression
1957 {
1958 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1959 }
1960 ;
1961
1962c_declaration:
1963 declaration_specifier declaring_list
1964 { $$ = distAttr( $1, $2 ); }
1965 | typedef_declaration
1966 | typedef_expression // deprecated GCC, naming expression type
1967 | sue_declaration_specifier
1968 ;
1969
1970declaring_list:
1971 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1972 // storage-class
1973 declarator asm_name_opt initializer_opt
1974 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
1975 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1976 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
1977 ;
1978
1979declaration_specifier: // type specifier + storage class
1980 basic_declaration_specifier
1981 | sue_declaration_specifier
1982 | type_declaration_specifier
1983 ;
1984
1985declaration_specifier_nobody: // type specifier + storage class - {...}
1986 // Preclude SUE declarations in restricted scopes:
1987 //
1988 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1989 //
1990 // because it is impossible to call f due to name equivalence.
1991 basic_declaration_specifier
1992 | sue_declaration_specifier_nobody
1993 | type_declaration_specifier
1994 ;
1995
1996type_specifier: // type specifier
1997 basic_type_specifier
1998 | sue_type_specifier
1999 {
2000 // printf( "sue_type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2001 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2002 // printf( "\tattr %s\n", attr->name.c_str() );
2003 // } // for
2004 }
2005 | type_type_specifier
2006 ;
2007
2008type_specifier_nobody: // type specifier - {...}
2009 // Preclude SUE declarations in restricted scopes:
2010 //
2011 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
2012 //
2013 // because it is impossible to call f due to name equivalence.
2014 basic_type_specifier
2015 | sue_type_specifier_nobody
2016 | type_type_specifier
2017 ;
2018
2019type_qualifier_list_opt: // GCC, used in asm_statement
2020 // empty
2021 { $$ = nullptr; }
2022 | type_qualifier_list
2023 ;
2024
2025type_qualifier_list:
2026 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
2027 //
2028 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
2029 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
2030 // appeared only once.
2031 type_qualifier
2032 | type_qualifier_list type_qualifier
2033 { $$ = $1->addQualifiers( $2 ); }
2034 ;
2035
2036type_qualifier:
2037 type_qualifier_name
2038 | attribute // trick handles most atrribute locations
2039 ;
2040
2041type_qualifier_name:
2042 CONST
2043 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
2044 | RESTRICT
2045 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
2046 | VOLATILE
2047 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
2048 | ATOMIC
2049 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
2050 | forall
2051 ;
2052
2053forall:
2054 FORALL '(' type_parameter_list ')' // CFA
2055 { $$ = DeclarationNode::newForall( $3 ); }
2056 ;
2057
2058declaration_qualifier_list:
2059 storage_class_list
2060 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
2061 { $$ = $1->addQualifiers( $2 ); }
2062 | declaration_qualifier_list type_qualifier_list storage_class_list
2063 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2064 ;
2065
2066storage_class_list:
2067 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
2068 // only one of each is specified, except for inline, which can appear with the others.
2069 //
2070 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
2071 // specifiers in a declaration.
2072 storage_class
2073 | storage_class_list storage_class
2074 { $$ = $1->addQualifiers( $2 ); }
2075 ;
2076
2077storage_class:
2078 EXTERN
2079 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
2080 | STATIC
2081 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
2082 | AUTO
2083 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
2084 | REGISTER
2085 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
2086 | THREADLOCALGCC // GCC
2087 { $$ = DeclarationNode::newStorageClass( Type::ThreadlocalGcc ); }
2088 | THREADLOCALC11 // C11
2089 { $$ = DeclarationNode::newStorageClass( Type::ThreadlocalC11 ); }
2090 // Put function specifiers here to simplify parsing rules, but separate them semantically.
2091 | INLINE // C99
2092 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
2093 | FORTRAN // C99
2094 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
2095 | NORETURN // C11
2096 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
2097 ;
2098
2099basic_type_name:
2100 VOID
2101 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2102 | BOOL // C99
2103 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
2104 | CHAR
2105 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
2106 | INT
2107 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
2108 | INT128
2109 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
2110 | UINT128
2111 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ); }
2112 | FLOAT
2113 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
2114 | DOUBLE
2115 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
2116 | uuFLOAT80
2117 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat80 ); }
2118 | uuFLOAT128
2119 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat128 ); }
2120 | uFLOAT16
2121 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat16 ); }
2122 | uFLOAT32
2123 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32 ); }
2124 | uFLOAT32X
2125 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32x ); }
2126 | uFLOAT64
2127 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64 ); }
2128 | uFLOAT64X
2129 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64x ); }
2130 | uFLOAT128
2131 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
2132 | DECIMAL32
2133 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
2134 | DECIMAL64
2135 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
2136 | DECIMAL128
2137 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
2138 | COMPLEX // C99
2139 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
2140 | IMAGINARY // C99
2141 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
2142 | SIGNED
2143 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
2144 | UNSIGNED
2145 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
2146 | SHORT
2147 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
2148 | LONG
2149 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
2150 | VALIST // GCC, __builtin_va_list
2151 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
2152 | AUTO_TYPE
2153 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::AutoType ); }
2154 | vtable
2155 ;
2156
2157vtable_opt:
2158 // empty
2159 { $$ = nullptr; }
2160 | vtable
2161 ;
2162
2163vtable:
2164 VTABLE '(' type_name ')' default_opt
2165 { $$ = DeclarationNode::newVtableType( $3 ); }
2166 // { SemanticError( yylloc, "vtable is currently unimplemented." ); $$ = nullptr; }
2167 ;
2168
2169default_opt:
2170 // empty
2171 { $$ = nullptr; }
2172 | DEFAULT
2173 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
2174 ;
2175
2176basic_declaration_specifier:
2177 // A semantic check is necessary for conflicting storage classes.
2178 basic_type_specifier
2179 | declaration_qualifier_list basic_type_specifier
2180 { $$ = $2->addQualifiers( $1 ); }
2181 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2182 { $$ = $1->addQualifiers( $2 ); }
2183 | basic_declaration_specifier storage_class type_qualifier_list
2184 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2185 | basic_declaration_specifier storage_class basic_type_specifier
2186 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
2187 ;
2188
2189basic_type_specifier:
2190 direct_type
2191 // Cannot have type modifiers, e.g., short, long, etc.
2192 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
2193 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
2194 ;
2195
2196direct_type:
2197 basic_type_name
2198 | type_qualifier_list basic_type_name
2199 { $$ = $2->addQualifiers( $1 ); }
2200 | direct_type type_qualifier
2201 { $$ = $1->addQualifiers( $2 ); }
2202 | direct_type basic_type_name
2203 { $$ = $1->addType( $2 ); }
2204 ;
2205
2206indirect_type:
2207 TYPEOF '(' type ')' // GCC: typeof( x ) y;
2208 { $$ = $3; }
2209 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
2210 { $$ = DeclarationNode::newTypeof( $3 ); }
2211 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
2212 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ), true ); }
2213 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
2214 { $$ = DeclarationNode::newTypeof( $3, true ); }
2215 | ZERO_T // CFA
2216 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
2217 | ONE_T // CFA
2218 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
2219 ;
2220
2221sue_declaration_specifier: // struct, union, enum + storage class + type specifier
2222 sue_type_specifier
2223 {
2224 // printf( "sue_declaration_specifier %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2225 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2226 // printf( "\tattr %s\n", attr->name.c_str() );
2227 // } // for
2228 }
2229 | declaration_qualifier_list sue_type_specifier
2230 { $$ = $2->addQualifiers( $1 ); }
2231 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2232 { $$ = $1->addQualifiers( $2 ); }
2233 | sue_declaration_specifier storage_class type_qualifier_list
2234 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2235 ;
2236
2237sue_type_specifier: // struct, union, enum + type specifier
2238 elaborated_type
2239 {
2240 // printf( "sue_type_specifier %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2241 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2242 // printf( "\tattr %s\n", attr->name.c_str() );
2243 // } // for
2244 }
2245 | type_qualifier_list
2246 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
2247 elaborated_type
2248 { $$ = $3->addQualifiers( $1 ); }
2249 | sue_type_specifier type_qualifier
2250 {
2251 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2252 $$ = $1->addQualifiers( $2 );
2253 }
2254 ;
2255
2256sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2257 sue_type_specifier_nobody
2258 | declaration_qualifier_list sue_type_specifier_nobody
2259 { $$ = $2->addQualifiers( $1 ); }
2260 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2261 { $$ = $1->addQualifiers( $2 ); }
2262 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2263 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2264 ;
2265
2266sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2267 elaborated_type_nobody
2268 | type_qualifier_list elaborated_type_nobody
2269 { $$ = $2->addQualifiers( $1 ); }
2270 | sue_type_specifier_nobody type_qualifier
2271 { $$ = $1->addQualifiers( $2 ); }
2272 ;
2273
2274type_declaration_specifier:
2275 type_type_specifier
2276 | declaration_qualifier_list type_type_specifier
2277 { $$ = $2->addQualifiers( $1 ); }
2278 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2279 { $$ = $1->addQualifiers( $2 ); }
2280 | type_declaration_specifier storage_class type_qualifier_list
2281 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2282 ;
2283
2284type_type_specifier: // typedef types
2285 type_name
2286 | type_qualifier_list type_name
2287 { $$ = $2->addQualifiers( $1 ); }
2288 | type_type_specifier type_qualifier
2289 { $$ = $1->addQualifiers( $2 ); }
2290 ;
2291
2292type_name:
2293 TYPEDEFname
2294 { $$ = DeclarationNode::newFromTypedef( $1 ); }
2295 | '.' TYPEDEFname
2296 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), DeclarationNode::newFromTypedef( $2 ) ); }
2297 | type_name '.' TYPEDEFname
2298 { $$ = DeclarationNode::newQualifiedType( $1, DeclarationNode::newFromTypedef( $3 ) ); }
2299 | typegen_name
2300 | '.' typegen_name
2301 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), $2 ); }
2302 | type_name '.' typegen_name
2303 { $$ = DeclarationNode::newQualifiedType( $1, $3 ); }
2304 ;
2305
2306typegen_name: // CFA
2307 TYPEGENname
2308 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2309 | TYPEGENname '(' ')'
2310 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2311 | TYPEGENname '(' type_list ')'
2312 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
2313 ;
2314
2315elaborated_type: // struct, union, enum
2316 aggregate_type
2317 {
2318 // printf( "elaborated_type %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2319 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2320 // printf( "\tattr %s\n", attr->name.c_str() );
2321 // } // for
2322 }
2323 | enum_type
2324 ;
2325
2326elaborated_type_nobody: // struct, union, enum - {...}
2327 aggregate_type_nobody
2328 | enum_type_nobody
2329 ;
2330
2331aggregate_type: // struct, union
2332 aggregate_key attribute_list_opt
2333 { forall = false; } // reset
2334 '{' field_declaration_list_opt '}' type_parameters_opt
2335 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2336 | aggregate_key attribute_list_opt identifier
2337 {
2338 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2339 forall = false; // reset
2340 }
2341 '{' field_declaration_list_opt '}' type_parameters_opt
2342 {
2343 // printf( "aggregate_type1 %s\n", $3.str->c_str() );
2344 // if ( $2 )
2345 // for ( Attribute * attr: reverseIterate( $2->attributes ) ) {
2346 // printf( "copySpecifiers12 %s\n", attr->name.c_str() );
2347 // } // for
2348 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2349 // printf( "aggregate_type2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2350 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2351 // printf( "aggregate_type3 %s\n", attr->name.c_str() );
2352 // } // for
2353 }
2354 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2355 {
2356 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2357 forall = false; // reset
2358 }
2359 '{' field_declaration_list_opt '}' type_parameters_opt
2360 {
2361 // printf( "AGG3\n" );
2362 DeclarationNode::newFromTypedef( $3 );
2363 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2364 }
2365 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2366 {
2367 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2368 forall = false; // reset
2369 }
2370 '{' field_declaration_list_opt '}' type_parameters_opt
2371 {
2372 // printf( "AGG4\n" );
2373 DeclarationNode::newFromTypeGen( $3, nullptr );
2374 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2375 }
2376 | aggregate_type_nobody
2377 ;
2378
2379type_parameters_opt:
2380 // empty
2381 { $$ = nullptr; } %prec '}'
2382 | '(' type_list ')'
2383 { $$ = $2; }
2384 ;
2385
2386aggregate_type_nobody: // struct, union - {...}
2387 aggregate_key attribute_list_opt identifier
2388 {
2389 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname );
2390 forall = false; // reset
2391 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2392 }
2393 | aggregate_key attribute_list_opt type_name
2394 {
2395 forall = false; // reset
2396 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2397 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2398 // delete newFromTypeGen.
2399 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2400 $3->type->symbolic.name = nullptr;
2401 $3->type->symbolic.actuals = nullptr;
2402 delete $3;
2403 }
2404 ;
2405
2406aggregate_key:
2407 aggregate_data
2408 | aggregate_control
2409 ;
2410
2411aggregate_data:
2412 STRUCT vtable_opt
2413 { $$ = AggregateDecl::Struct; }
2414 | UNION
2415 { $$ = AggregateDecl::Union; }
2416 | EXCEPTION // CFA
2417 { $$ = AggregateDecl::Exception; }
2418 // { SemanticError( yylloc, "exception aggregate is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2419 ;
2420
2421aggregate_control: // CFA
2422 MONITOR
2423 { $$ = AggregateDecl::Monitor; }
2424 | MUTEX STRUCT
2425 { $$ = AggregateDecl::Monitor; }
2426 | GENERATOR
2427 { $$ = AggregateDecl::Generator; }
2428 | MUTEX GENERATOR
2429 { SemanticError( yylloc, "monitor generator is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2430 | COROUTINE
2431 { $$ = AggregateDecl::Coroutine; }
2432 | MUTEX COROUTINE
2433 { SemanticError( yylloc, "monitor coroutine is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2434 | THREAD
2435 { $$ = AggregateDecl::Thread; }
2436 | MUTEX THREAD
2437 { SemanticError( yylloc, "monitor thread is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2438 ;
2439
2440field_declaration_list_opt:
2441 // empty
2442 { $$ = nullptr; }
2443 | field_declaration_list_opt field_declaration
2444 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2445 ;
2446
2447field_declaration:
2448 type_specifier field_declaring_list_opt ';'
2449 {
2450 // printf( "type_specifier1 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2451 $$ = fieldDecl( $1, $2 );
2452 // printf( "type_specifier2 %p %s\n", $$, $$->type->aggregate.name ? $$->type->aggregate.name->c_str() : "(nil)" );
2453 // for ( Attribute * attr: reverseIterate( $$->attributes ) ) {
2454 // printf( "\tattr %s\n", attr->name.c_str() );
2455 // } // for
2456 }
2457 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2458 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2459 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2460 {
2461 if ( ! $3 ) { // field declarator ?
2462 $3 = DeclarationNode::newName( nullptr );
2463 } // if
2464 $3->inLine = true;
2465 $$ = distAttr( $2, $3 ); // mark all fields in list
2466 distInl( $3 );
2467 }
2468 | INLINE aggregate_control ';' // CFA
2469 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2470 | typedef_declaration ';' // CFA
2471 | cfa_field_declaring_list ';' // CFA, new style field declaration
2472 | EXTENSION cfa_field_declaring_list ';' // GCC
2473 { distExt( $2 ); $$ = $2; } // mark all fields in list
2474 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2475 { $$ = $2; } // mark all fields in list
2476 | cfa_typedef_declaration ';' // CFA
2477 | static_assert // C11
2478 ;
2479
2480field_declaring_list_opt:
2481 // empty
2482 { $$ = nullptr; }
2483 | field_declarator
2484 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2485 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2486 ;
2487
2488field_declarator:
2489 bit_subrange_size // C special case, no field name
2490 { $$ = DeclarationNode::newBitfield( $1 ); }
2491 | variable_declarator bit_subrange_size_opt
2492 // A semantic check is required to ensure bit_subrange only appears on integral types.
2493 { $$ = $1->addBitfield( $2 ); }
2494 | variable_type_redeclarator bit_subrange_size_opt
2495 // A semantic check is required to ensure bit_subrange only appears on integral types.
2496 { $$ = $1->addBitfield( $2 ); }
2497 ;
2498
2499field_abstract_list_opt:
2500 // empty
2501 { $$ = nullptr; }
2502 | field_abstract
2503 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2504 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2505 ;
2506
2507field_abstract:
2508 // no bit fields
2509 variable_abstract_declarator
2510 ;
2511
2512cfa_field_declaring_list: // CFA, new style field declaration
2513 // bit-fields are handled by C declarations
2514 cfa_abstract_declarator_tuple identifier_or_type_name
2515 { $$ = $1->addName( $2 ); }
2516 | cfa_field_declaring_list ',' identifier_or_type_name
2517 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
2518 ;
2519
2520cfa_field_abstract_list: // CFA, new style field declaration
2521 // bit-fields are handled by C declarations
2522 cfa_abstract_declarator_tuple
2523 | cfa_field_abstract_list ','
2524 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
2525 ;
2526
2527bit_subrange_size_opt:
2528 // empty
2529 { $$ = nullptr; }
2530 | bit_subrange_size
2531 ;
2532
2533bit_subrange_size:
2534 ':' assignment_expression
2535 { $$ = $2; }
2536 ;
2537
2538enum_type:
2539 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
2540 { $$ = DeclarationNode::newEnum( nullptr, $4, true, false )->addQualifiers( $2 ); }
2541 | ENUM attribute_list_opt identifier
2542 { typedefTable.makeTypedef( *$3 ); }
2543 '{' enumerator_list comma_opt '}'
2544 { $$ = DeclarationNode::newEnum( $3, $6, true, false )->addQualifiers( $2 ); }
2545 | ENUM attribute_list_opt typedef_name // unqualified type name
2546 '{' enumerator_list comma_opt '}'
2547 { $$ = DeclarationNode::newEnum( $3->name, $5, true, false )->addQualifiers( $2 ); }
2548 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2549 {
2550 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 )
2551 { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2552
2553 $$ = DeclarationNode::newEnum( nullptr, $7, true, true, $3 )->addQualifiers( $5 );
2554 }
2555 | ENUM '(' ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2556 {
2557 $$ = DeclarationNode::newEnum( nullptr, $6, true, true )->addQualifiers( $4 );
2558 }
2559 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt identifier attribute_list_opt
2560 {
2561 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 ) { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2562 typedefTable.makeTypedef( *$6 );
2563 }
2564 '{' enumerator_list comma_opt '}'
2565 {
2566 $$ = DeclarationNode::newEnum( $6, $10, true, true, $3 )->addQualifiers( $5 )->addQualifiers( $7 );
2567 }
2568 | ENUM '(' ')' attribute_list_opt identifier attribute_list_opt
2569 '{' enumerator_list comma_opt '}'
2570 {
2571 $$ = DeclarationNode::newEnum( $5, $8, true, true, nullptr )->addQualifiers( $4 )->addQualifiers( $6 );
2572 }
2573 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt typedef_name attribute_list_opt '{' enumerator_list comma_opt '}'
2574 {
2575 $$ = DeclarationNode::newEnum( $6->name, $9, true, true, $3 )->addQualifiers( $5 )->addQualifiers( $7 );
2576 }
2577 | ENUM '(' ')' attribute_list_opt typedef_name attribute_list_opt '{' enumerator_list comma_opt '}'
2578 {
2579 $$ = DeclarationNode::newEnum( $5->name, $8, true, true, nullptr )->addQualifiers( $4 )->addQualifiers( $6 );
2580 }
2581 | enum_type_nobody
2582 ;
2583
2584enum_type_nobody: // enum - {...}
2585 ENUM attribute_list_opt identifier
2586 { typedefTable.makeTypedef( *$3 ); $$ = DeclarationNode::newEnum( $3, 0, false, false )->addQualifiers( $2 ); }
2587 | ENUM attribute_list_opt type_name
2588 { typedefTable.makeTypedef( *$3->type->symbolic.name ); $$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false, false )->addQualifiers( $2 ); }
2589 ;
2590
2591enumerator_list:
2592 identifier_or_type_name enumerator_value_opt
2593 { $$ = DeclarationNode::newEnumValueGeneric( $1, $2 ); }
2594 | INLINE type_name
2595 { $$ = DeclarationNode::newEnumValueGeneric( new string("inline"), nullptr ); }
2596 | enumerator_list ',' identifier_or_type_name enumerator_value_opt
2597 { $$ = $1->appendList( DeclarationNode::newEnumValueGeneric( $3, $4 ) ); }
2598 | enumerator_list ',' INLINE type_name enumerator_value_opt
2599 { $$ = $1->appendList( DeclarationNode::newEnumValueGeneric( new string("inline"), nullptr ) ); }
2600 ;
2601
2602enumerator_value_opt:
2603 // empty
2604 { $$ = nullptr; }
2605 | '=' constant_expression { $$ = new InitializerNode( $2 ); }
2606 | '=' '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $3, true ); }
2607 // | simple_assignment_operator initializer
2608 // { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2609 ;
2610
2611cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
2612 // empty
2613 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2614 | ELLIPSIS
2615 { $$ = nullptr; }
2616 | cfa_abstract_parameter_list
2617 | cfa_parameter_list
2618 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2619 { $$ = $1->appendList( $5 ); }
2620 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2621 { $$ = $1->addVarArgs(); }
2622 | cfa_parameter_list pop ',' push ELLIPSIS
2623 { $$ = $1->addVarArgs(); }
2624 ;
2625
2626cfa_parameter_list: // CFA
2627 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2628 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2629 cfa_parameter_declaration
2630 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2631 { $$ = $1->appendList( $5 ); }
2632 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2633 { $$ = $1->appendList( $5 ); }
2634 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2635 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2636 ;
2637
2638cfa_abstract_parameter_list: // CFA, new & old style abstract
2639 cfa_abstract_parameter_declaration
2640 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2641 { $$ = $1->appendList( $5 ); }
2642 ;
2643
2644parameter_type_list_opt:
2645 // empty
2646 { $$ = nullptr; }
2647 | ELLIPSIS
2648 { $$ = nullptr; }
2649 | parameter_list
2650 | parameter_list pop ',' push ELLIPSIS
2651 { $$ = $1->addVarArgs(); }
2652 ;
2653
2654parameter_list: // abstract + real
2655 abstract_parameter_declaration
2656 | parameter_declaration
2657 | parameter_list pop ',' push abstract_parameter_declaration
2658 { $$ = $1->appendList( $5 ); }
2659 | parameter_list pop ',' push parameter_declaration
2660 { $$ = $1->appendList( $5 ); }
2661 ;
2662
2663// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2664// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2665
2666cfa_parameter_declaration: // CFA, new & old style parameter declaration
2667 parameter_declaration
2668 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2669 { $$ = $1->addName( $2 ); }
2670 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2671 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2672 { $$ = $1->addName( $2 ); }
2673 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2674 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2675 | cfa_function_specifier
2676 ;
2677
2678cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2679 abstract_parameter_declaration
2680 | cfa_identifier_parameter_declarator_no_tuple
2681 | cfa_abstract_tuple
2682 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2683 | type_qualifier_list cfa_abstract_tuple
2684 { $$ = $2->addQualifiers( $1 ); }
2685 | cfa_abstract_function
2686 ;
2687
2688parameter_declaration:
2689 // No SUE declaration in parameter list.
2690 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2691 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2692 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2693 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2694 ;
2695
2696abstract_parameter_declaration:
2697 declaration_specifier_nobody default_initializer_opt
2698 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2699 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2700 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2701 ;
2702
2703// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2704// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2705// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2706
2707identifier_list: // K&R-style parameter list => no types
2708 identifier
2709 { $$ = DeclarationNode::newName( $1 ); }
2710 | identifier_list ',' identifier
2711 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2712 ;
2713
2714identifier_or_type_name:
2715 identifier
2716 | TYPEDEFname
2717 | TYPEGENname
2718 ;
2719
2720type_no_function: // sizeof, alignof, cast (constructor)
2721 cfa_abstract_declarator_tuple // CFA
2722 | type_specifier
2723 | type_specifier abstract_declarator
2724 { $$ = $2->addType( $1 ); }
2725 ;
2726
2727type: // typeof, assertion
2728 type_no_function
2729 | cfa_abstract_function // CFA
2730 ;
2731
2732initializer_opt:
2733 // empty
2734 { $$ = nullptr; }
2735 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2736 | '=' VOID { $$ = new InitializerNode( true ); }
2737 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2738 ;
2739
2740initializer:
2741 assignment_expression { $$ = new InitializerNode( $1 ); }
2742 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2743 ;
2744
2745initializer_list_opt:
2746 // empty
2747 { $$ = nullptr; }
2748 | initializer
2749 | designation initializer { $$ = $2->set_designators( $1 ); }
2750 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2751 | initializer_list_opt ',' designation initializer { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2752 ;
2753
2754// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2755// '=' to separator the designator from the initializer value, as in:
2756//
2757// int x[10] = { [1] = 3 };
2758//
2759// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2760// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2761// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2762// shift/reduce conflicts
2763
2764designation:
2765 designator_list ':' // C99, CFA uses ":" instead of "="
2766 | identifier_at ':' // GCC, field name
2767 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2768 ;
2769
2770designator_list: // C99
2771 designator
2772 | designator_list designator
2773 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
2774 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2775 ;
2776
2777designator:
2778 '.' identifier_at // C99, field name
2779 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2780 | '[' push assignment_expression pop ']' // C99, single array element
2781 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2782 { $$ = $3; }
2783 | '[' push subrange pop ']' // CFA, multiple array elements
2784 { $$ = $3; }
2785 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2786 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $3 ), maybeMoveBuild<Expression>( $5 ) ) ); }
2787 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
2788 { $$ = $4; }
2789 ;
2790
2791// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2792// rather than an object-oriented type system. This required four groups of extensions:
2793//
2794// Overloading: function, data, and operator identifiers may be overloaded.
2795//
2796// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2797// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2798// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2799//
2800// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2801// site. A polymorphic function is not a template; it is a function, with an address and a type.
2802//
2803// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2804// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2805// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2806// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2807// on type arguments of polymorphic functions.
2808
2809type_parameter_list: // CFA
2810 type_parameter
2811 | type_parameter_list ',' type_parameter
2812 { $$ = $1->appendList( $3 ); }
2813 ;
2814
2815type_initializer_opt: // CFA
2816 // empty
2817 { $$ = nullptr; }
2818 | '=' type
2819 { $$ = $2; }
2820 ;
2821
2822type_parameter: // CFA
2823 type_class identifier_or_type_name
2824 {
2825 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2826 if ( $1 == TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
2827 if ( $1 == TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
2828 if ( $1 == TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
2829 }
2830 type_initializer_opt assertion_list_opt
2831 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2832 | identifier_or_type_name new_type_class
2833 { typedefTable.addToScope( *$1, TYPEDEFname, "9" ); }
2834 type_initializer_opt assertion_list_opt
2835 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2836 | '[' identifier_or_type_name ']'
2837 {
2838 typedefTable.addToScope( *$2, TYPEDIMname, "9" );
2839 $$ = DeclarationNode::newTypeParam( TypeDecl::Dimension, $2 );
2840 }
2841 // | type_specifier identifier_parameter_declarator
2842 | assertion_list
2843 { $$ = DeclarationNode::newTypeParam( TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
2844 ;
2845
2846new_type_class: // CFA
2847 // empty
2848 { $$ = TypeDecl::Otype; }
2849 | '&'
2850 { $$ = TypeDecl::Dtype; }
2851 | '*'
2852 { $$ = TypeDecl::DStype; } // dtype + sized
2853 // | '(' '*' ')'
2854 // { $$ = TypeDecl::Ftype; }
2855 | ELLIPSIS
2856 { $$ = TypeDecl::Ttype; }
2857 ;
2858
2859type_class: // CFA
2860 OTYPE
2861 { $$ = TypeDecl::Otype; }
2862 | DTYPE
2863 { $$ = TypeDecl::Dtype; }
2864 | FTYPE
2865 { $$ = TypeDecl::Ftype; }
2866 | TTYPE
2867 { $$ = TypeDecl::Ttype; }
2868 ;
2869
2870assertion_list_opt: // CFA
2871 // empty
2872 { $$ = nullptr; }
2873 | assertion_list
2874 ;
2875
2876assertion_list: // CFA
2877 assertion
2878 | assertion_list assertion
2879 { $$ = $1->appendList( $2 ); }
2880 ;
2881
2882assertion: // CFA
2883 '|' identifier_or_type_name '(' type_list ')'
2884 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
2885 | '|' '{' push trait_declaration_list pop '}'
2886 { $$ = $4; }
2887 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
2888 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
2889 ;
2890
2891type_list: // CFA
2892 type
2893 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2894 | assignment_expression
2895 | type_list ',' type
2896 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) )); }
2897 | type_list ',' assignment_expression
2898 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2899 ;
2900
2901type_declaring_list: // CFA
2902 OTYPE type_declarator
2903 { $$ = $2; }
2904 | storage_class_list OTYPE type_declarator
2905 { $$ = $3->addQualifiers( $1 ); }
2906 | type_declaring_list ',' type_declarator
2907 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2908 ;
2909
2910type_declarator: // CFA
2911 type_declarator_name assertion_list_opt
2912 { $$ = $1->addAssertions( $2 ); }
2913 | type_declarator_name assertion_list_opt '=' type
2914 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2915 ;
2916
2917type_declarator_name: // CFA
2918 identifier_or_type_name
2919 {
2920 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
2921 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2922 }
2923 | identifier_or_type_name '(' type_parameter_list ')'
2924 {
2925 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "11" );
2926 $$ = DeclarationNode::newTypeDecl( $1, $3 );
2927 }
2928 ;
2929
2930trait_specifier: // CFA
2931 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
2932 { $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
2933 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
2934 { $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
2935 ;
2936
2937trait_declaration_list: // CFA
2938 trait_declaration
2939 | trait_declaration_list pop push trait_declaration
2940 { $$ = $1->appendList( $4 ); }
2941 ;
2942
2943trait_declaration: // CFA
2944 cfa_trait_declaring_list ';'
2945 | trait_declaring_list ';'
2946 ;
2947
2948cfa_trait_declaring_list: // CFA
2949 cfa_variable_specifier
2950 | cfa_function_specifier
2951 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2952 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
2953 ;
2954
2955trait_declaring_list: // CFA
2956 type_specifier declarator
2957 { $$ = $2->addType( $1 ); }
2958 | trait_declaring_list pop ',' push declarator
2959 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
2960 ;
2961
2962//***************************** EXTERNAL DEFINITIONS *****************************
2963
2964translation_unit:
2965 // empty, input file
2966 | external_definition_list
2967 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2968 ;
2969
2970external_definition_list:
2971 push external_definition pop
2972 { $$ = $2; }
2973 | external_definition_list push external_definition pop
2974 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2975 ;
2976
2977external_definition_list_opt:
2978 // empty
2979 { $$ = nullptr; }
2980 | external_definition_list
2981 ;
2982
2983up:
2984 { typedefTable.up( forall ); forall = false; }
2985 ;
2986
2987down:
2988 { typedefTable.down(); }
2989 ;
2990
2991external_definition:
2992 DIRECTIVE
2993 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( $1 ) ) ); }
2994 | declaration
2995 | external_function_definition
2996 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2997 {
2998 distExt( $2 ); // mark all fields in list
2999 $$ = $2;
3000 }
3001 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
3002 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) ); }
3003 | EXTERN STRINGliteral
3004 {
3005 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3006 linkage = LinkageSpec::update( yylloc, linkage, $2 );
3007 }
3008 up external_definition down
3009 {
3010 linkage = linkageStack.top();
3011 linkageStack.pop();
3012 $$ = $5;
3013 }
3014 | EXTERN STRINGliteral // C++-style linkage specifier
3015 {
3016 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
3017 linkage = LinkageSpec::update( yylloc, linkage, $2 );
3018 }
3019 '{' up external_definition_list_opt down '}'
3020 {
3021 linkage = linkageStack.top();
3022 linkageStack.pop();
3023 $$ = $6;
3024 }
3025 | type_qualifier_list
3026 {
3027 if ( $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
3028 if ( $1->type->forall ) forall = true; // remember generic type
3029 }
3030 '{' up external_definition_list_opt down '}' // CFA, namespace
3031 {
3032 distQual( $5, $1 );
3033 forall = false;
3034 $$ = $5;
3035 }
3036 | declaration_qualifier_list
3037 {
3038 if ( $1->type && $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
3039 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
3040 }
3041 '{' up external_definition_list_opt down '}' // CFA, namespace
3042 {
3043 distQual( $5, $1 );
3044 forall = false;
3045 $$ = $5;
3046 }
3047 | declaration_qualifier_list type_qualifier_list
3048 {
3049 if ( ($1->type && $1->type->qualifiers.val) || $2->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
3050 if ( ($1->type && $1->type->forall) || $2->type->forall ) forall = true; // remember generic type
3051 }
3052 '{' up external_definition_list_opt down '}' // CFA, namespace
3053 {
3054 distQual( $6, $1->addQualifiers( $2 ) );
3055 forall = false;
3056 $$ = $6;
3057 }
3058 ;
3059
3060external_function_definition:
3061 function_definition
3062 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
3063 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
3064 // Parsing is possible because function_definition does not appear in the context of an expression (nested
3065 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
3066 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
3067 | function_declarator compound_statement
3068 { $$ = $1->addFunctionBody( $2 ); }
3069 | KR_function_declarator KR_parameter_list_opt compound_statement
3070 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
3071 ;
3072
3073with_clause_opt:
3074 // empty
3075 { $$ = nullptr; forall = false; }
3076 | WITH '(' tuple_expression_list ')' attribute_list_opt
3077 {
3078 $$ = $3; forall = false;
3079 if ( $5 ) {
3080 SemanticError( yylloc, "Attributes cannot be associated with function body. Move attribute(s) before \"with\" clause." );
3081 $$ = nullptr;
3082 } // if
3083 }
3084 ;
3085
3086function_definition:
3087 cfa_function_declaration with_clause_opt compound_statement // CFA
3088 {
3089 // Add the function body to the last identifier in the function definition list, i.e., foo3:
3090 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
3091 $1->get_last()->addFunctionBody( $3, $2 );
3092 $$ = $1;
3093 }
3094 | declaration_specifier function_declarator with_clause_opt compound_statement
3095 {
3096 rebindForall( $1, $2 );
3097 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3098 }
3099 | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement
3100 {
3101 rebindForall( $1, $2 );
3102 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
3103 }
3104 // handles default int return type, OBSOLESCENT (see 1)
3105 | type_qualifier_list function_declarator with_clause_opt compound_statement
3106 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3107 // handles default int return type, OBSOLESCENT (see 1)
3108 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
3109 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
3110 // handles default int return type, OBSOLESCENT (see 1)
3111 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
3112 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3113
3114 // Old-style K&R function definition, OBSOLESCENT (see 4)
3115 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3116 {
3117 rebindForall( $1, $2 );
3118 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
3119 }
3120 // handles default int return type, OBSOLESCENT (see 1)
3121 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3122 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3123 // handles default int return type, OBSOLESCENT (see 1)
3124 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3125 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
3126 // handles default int return type, OBSOLESCENT (see 1)
3127 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
3128 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
3129 ;
3130
3131declarator:
3132 variable_declarator
3133 | variable_type_redeclarator
3134 | function_declarator
3135 ;
3136
3137subrange:
3138 constant_expression '~' constant_expression // CFA, integer subrange
3139 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
3140 ;
3141
3142asm_name_opt: // GCC
3143 // empty
3144 { $$ = nullptr; }
3145 | ASM '(' string_literal ')' attribute_list_opt
3146 {
3147 DeclarationNode * name = new DeclarationNode();
3148 name->asmName = $3;
3149 $$ = name->addQualifiers( $5 );
3150 }
3151 ;
3152
3153attribute_list_opt: // GCC
3154 // empty
3155 { $$ = nullptr; }
3156 | attribute_list
3157 ;
3158
3159attribute_list: // GCC
3160 attribute
3161 | attribute_list attribute
3162 { $$ = $2->addQualifiers( $1 ); }
3163 ;
3164
3165attribute: // GCC
3166 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
3167 { $$ = $4; }
3168 ;
3169
3170attribute_name_list: // GCC
3171 attribute_name
3172 | attribute_name_list ',' attribute_name
3173 { $$ = $3->addQualifiers( $1 ); }
3174 ;
3175
3176attribute_name: // GCC
3177 // empty
3178 { $$ = nullptr; }
3179 | attr_name
3180 { $$ = DeclarationNode::newAttribute( $1 ); }
3181 | attr_name '(' argument_expression_list_opt ')'
3182 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
3183 ;
3184
3185attr_name: // GCC
3186 IDENTIFIER
3187 | quasi_keyword
3188 | TYPEDEFname
3189 | TYPEGENname
3190 | FALLTHROUGH
3191 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
3192 | CONST
3193 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
3194 ;
3195
3196// ============================================================================
3197// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
3198// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
3199// in:
3200//
3201// int (*f())[10] { ... };
3202// ... (*f())[3] += 1; // definition mimics usage
3203//
3204// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
3205// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
3206// ============================================================================
3207
3208// ----------------------------------------------------------------------------
3209// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
3210// to define a variable or function prototype, e.g.:
3211//
3212// valid declaration invalid definition
3213// ----------------- ------------------
3214// int f; int f {}
3215// int *f; int *f {}
3216// int f[10]; int f[10] {}
3217// int (*f)(int); int (*f)(int) {}
3218//
3219// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
3220// variable_declarator and function_declarator.
3221// ----------------------------------------------------------------------------
3222
3223// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
3224// declaring an array of functions versus a pointer to an array of functions.
3225
3226paren_identifier:
3227 identifier_at
3228 { $$ = DeclarationNode::newName( $1 ); }
3229 | '(' paren_identifier ')' // redundant parenthesis
3230 { $$ = $2; }
3231 ;
3232
3233variable_declarator:
3234 paren_identifier attribute_list_opt
3235 { $$ = $1->addQualifiers( $2 ); }
3236 | variable_ptr
3237 | variable_array attribute_list_opt
3238 { $$ = $1->addQualifiers( $2 ); }
3239 | variable_function attribute_list_opt
3240 { $$ = $1->addQualifiers( $2 ); }
3241 ;
3242
3243variable_ptr:
3244 ptrref_operator variable_declarator
3245 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3246 | ptrref_operator type_qualifier_list variable_declarator
3247 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3248 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
3249 { $$ = $2->addQualifiers( $4 ); }
3250 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
3251 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3252 ;
3253
3254variable_array:
3255 paren_identifier array_dimension
3256 { $$ = $1->addArray( $2 ); }
3257 | '(' variable_ptr ')' array_dimension
3258 { $$ = $2->addArray( $4 ); }
3259 | '(' attribute_list variable_ptr ')' array_dimension
3260 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3261 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
3262 { $$ = $2->addArray( $4 ); }
3263 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
3264 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3265 | '(' variable_array ')' // redundant parenthesis
3266 { $$ = $2; }
3267 | '(' attribute_list variable_array ')' // redundant parenthesis
3268 { $$ = $3->addQualifiers( $2 ); }
3269 ;
3270
3271variable_function:
3272 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3273 { $$ = $2->addParamList( $6 ); }
3274 | '(' attribute_list variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3275 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3276 | '(' variable_function ')' // redundant parenthesis
3277 { $$ = $2; }
3278 | '(' attribute_list variable_function ')' // redundant parenthesis
3279 { $$ = $3->addQualifiers( $2 ); }
3280 ;
3281
3282// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
3283// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
3284// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
3285
3286function_declarator:
3287 function_no_ptr attribute_list_opt
3288 { $$ = $1->addQualifiers( $2 ); }
3289 | function_ptr
3290 | function_array attribute_list_opt
3291 { $$ = $1->addQualifiers( $2 ); }
3292 ;
3293
3294function_no_ptr:
3295 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3296 { $$ = $1->addParamList( $4 ); }
3297 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
3298 { $$ = $2->addParamList( $6 ); }
3299 | '(' attribute_list function_ptr ')' '(' push parameter_type_list_opt pop ')'
3300 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3301 | '(' function_no_ptr ')' // redundant parenthesis
3302 { $$ = $2; }
3303 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
3304 { $$ = $3->addQualifiers( $2 ); }
3305 ;
3306
3307function_ptr:
3308 ptrref_operator function_declarator
3309 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3310 | ptrref_operator type_qualifier_list function_declarator
3311 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3312 | '(' function_ptr ')' attribute_list_opt
3313 { $$ = $2->addQualifiers( $4 ); }
3314 | '(' attribute_list function_ptr ')' attribute_list_opt
3315 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3316 ;
3317
3318function_array:
3319 '(' function_ptr ')' array_dimension
3320 { $$ = $2->addArray( $4 ); }
3321 | '(' attribute_list function_ptr ')' array_dimension
3322 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3323 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3324 { $$ = $2->addArray( $4 ); }
3325 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3326 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3327 | '(' function_array ')' // redundant parenthesis
3328 { $$ = $2; }
3329 | '(' attribute_list function_array ')' // redundant parenthesis
3330 { $$ = $3->addQualifiers( $2 ); }
3331 ;
3332
3333// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3334//
3335// f( a, b, c ) int a, *b, c[]; {}
3336//
3337// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3338// returning arrays and functions versus pointers to arrays and functions.
3339
3340KR_function_declarator:
3341 KR_function_no_ptr
3342 | KR_function_ptr
3343 | KR_function_array
3344 ;
3345
3346KR_function_no_ptr:
3347 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3348 { $$ = $1->addIdList( $3 ); }
3349 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3350 { $$ = $2->addParamList( $6 ); }
3351 | '(' attribute_list KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3352 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3353 | '(' KR_function_no_ptr ')' // redundant parenthesis
3354 { $$ = $2; }
3355 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3356 { $$ = $3->addQualifiers( $2 ); }
3357 ;
3358
3359KR_function_ptr:
3360 ptrref_operator KR_function_declarator
3361 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3362 | ptrref_operator type_qualifier_list KR_function_declarator
3363 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3364 | '(' KR_function_ptr ')'
3365 { $$ = $2; }
3366 | '(' attribute_list KR_function_ptr ')'
3367 { $$ = $3->addQualifiers( $2 ); }
3368 ;
3369
3370KR_function_array:
3371 '(' KR_function_ptr ')' array_dimension
3372 { $$ = $2->addArray( $4 ); }
3373 | '(' attribute_list KR_function_ptr ')' array_dimension
3374 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3375 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3376 { $$ = $2->addArray( $4 ); }
3377 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3378 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3379 | '(' KR_function_array ')' // redundant parenthesis
3380 { $$ = $2; }
3381 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3382 { $$ = $3->addQualifiers( $2 ); }
3383 ;
3384
3385// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
3386//
3387// typedef int foo;
3388// {
3389// int foo; // redefine typedef name in new scope
3390// }
3391//
3392// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3393// and functions versus pointers to arrays and functions.
3394
3395paren_type:
3396 typedef_name
3397 {
3398 // hide type name in enclosing scope by variable name
3399 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "ID" );
3400 }
3401 | '(' paren_type ')'
3402 { $$ = $2; }
3403 ;
3404
3405variable_type_redeclarator:
3406 paren_type attribute_list_opt
3407 { $$ = $1->addQualifiers( $2 ); }
3408 | type_ptr
3409 | type_array attribute_list_opt
3410 { $$ = $1->addQualifiers( $2 ); }
3411 | type_function attribute_list_opt
3412 { $$ = $1->addQualifiers( $2 ); }
3413 ;
3414
3415type_ptr:
3416 ptrref_operator variable_type_redeclarator
3417 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3418 | ptrref_operator type_qualifier_list variable_type_redeclarator
3419 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3420 | '(' type_ptr ')' attribute_list_opt // redundant parenthesis
3421 { $$ = $2->addQualifiers( $4 ); }
3422 | '(' attribute_list type_ptr ')' attribute_list_opt // redundant parenthesis
3423 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3424 ;
3425
3426type_array:
3427 paren_type array_dimension
3428 { $$ = $1->addArray( $2 ); }
3429 | '(' type_ptr ')' array_dimension
3430 { $$ = $2->addArray( $4 ); }
3431 | '(' attribute_list type_ptr ')' array_dimension
3432 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3433 | '(' type_array ')' multi_array_dimension // redundant parenthesis
3434 { $$ = $2->addArray( $4 ); }
3435 | '(' attribute_list type_array ')' multi_array_dimension // redundant parenthesis
3436 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3437 | '(' type_array ')' // redundant parenthesis
3438 { $$ = $2; }
3439 | '(' attribute_list type_array ')' // redundant parenthesis
3440 { $$ = $3->addQualifiers( $2 ); }
3441 ;
3442
3443type_function:
3444 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3445 { $$ = $1->addParamList( $4 ); }
3446 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3447 { $$ = $2->addParamList( $6 ); }
3448 | '(' attribute_list type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3449 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3450 | '(' type_function ')' // redundant parenthesis
3451 { $$ = $2; }
3452 | '(' attribute_list type_function ')' // redundant parenthesis
3453 { $$ = $3->addQualifiers( $2 ); }
3454 ;
3455
3456// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3457// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3458// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3459// pointers to arrays and functions.
3460
3461identifier_parameter_declarator:
3462 paren_identifier attribute_list_opt
3463 { $$ = $1->addQualifiers( $2 ); }
3464 | '&' MUTEX paren_identifier attribute_list_opt
3465 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3466 | identifier_parameter_ptr
3467 | identifier_parameter_array attribute_list_opt
3468 { $$ = $1->addQualifiers( $2 ); }
3469 | identifier_parameter_function attribute_list_opt
3470 { $$ = $1->addQualifiers( $2 ); }
3471 ;
3472
3473identifier_parameter_ptr:
3474 ptrref_operator identifier_parameter_declarator
3475 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3476 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3477 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3478 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3479 { $$ = $2->addQualifiers( $4 ); }
3480 ;
3481
3482identifier_parameter_array:
3483 paren_identifier array_parameter_dimension
3484 { $$ = $1->addArray( $2 ); }
3485 | '(' identifier_parameter_ptr ')' array_dimension
3486 { $$ = $2->addArray( $4 ); }
3487 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3488 { $$ = $2->addArray( $4 ); }
3489 | '(' identifier_parameter_array ')' // redundant parenthesis
3490 { $$ = $2; }
3491 ;
3492
3493identifier_parameter_function:
3494 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3495 { $$ = $1->addParamList( $4 ); }
3496 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3497 { $$ = $2->addParamList( $6 ); }
3498 | '(' identifier_parameter_function ')' // redundant parenthesis
3499 { $$ = $2; }
3500 ;
3501
3502// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3503// e.g.:
3504//
3505// typedef int foo;
3506// forall( otype T ) struct foo;
3507// int f( int foo ); // redefine typedef name in new scope
3508//
3509// and allows the C99 array options, which can only appear in a parameter list.
3510
3511type_parameter_redeclarator:
3512 typedef_name attribute_list_opt
3513 { $$ = $1->addQualifiers( $2 ); }
3514 | '&' MUTEX typedef_name attribute_list_opt
3515 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3516 | type_parameter_ptr
3517 | type_parameter_array attribute_list_opt
3518 { $$ = $1->addQualifiers( $2 ); }
3519 | type_parameter_function attribute_list_opt
3520 { $$ = $1->addQualifiers( $2 ); }
3521 ;
3522
3523typedef_name:
3524 TYPEDEFname
3525 { $$ = DeclarationNode::newName( $1 ); }
3526 | TYPEGENname
3527 { $$ = DeclarationNode::newName( $1 ); }
3528 ;
3529
3530type_parameter_ptr:
3531 ptrref_operator type_parameter_redeclarator
3532 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3533 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3534 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3535 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3536 { $$ = $2->addQualifiers( $4 ); }
3537 ;
3538
3539type_parameter_array:
3540 typedef_name array_parameter_dimension
3541 { $$ = $1->addArray( $2 ); }
3542 | '(' type_parameter_ptr ')' array_parameter_dimension
3543 { $$ = $2->addArray( $4 ); }
3544 ;
3545
3546type_parameter_function:
3547 typedef_name '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3548 { $$ = $1->addParamList( $4 ); }
3549 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3550 { $$ = $2->addParamList( $6 ); }
3551 ;
3552
3553// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3554// which the type applies, e.g.:
3555//
3556// sizeof( int );
3557// sizeof( int * );
3558// sizeof( int [10] );
3559// sizeof( int (*)() );
3560// sizeof( int () );
3561//
3562// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3563// and functions versus pointers to arrays and functions.
3564
3565abstract_declarator:
3566 abstract_ptr
3567 | abstract_array attribute_list_opt
3568 { $$ = $1->addQualifiers( $2 ); }
3569 | abstract_function attribute_list_opt
3570 { $$ = $1->addQualifiers( $2 ); }
3571 ;
3572
3573abstract_ptr:
3574 ptrref_operator
3575 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3576 | ptrref_operator type_qualifier_list
3577 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3578 | ptrref_operator abstract_declarator
3579 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3580 | ptrref_operator type_qualifier_list abstract_declarator
3581 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3582 | '(' abstract_ptr ')' attribute_list_opt
3583 { $$ = $2->addQualifiers( $4 ); }
3584 ;
3585
3586abstract_array:
3587 array_dimension
3588 | '(' abstract_ptr ')' array_dimension
3589 { $$ = $2->addArray( $4 ); }
3590 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3591 { $$ = $2->addArray( $4 ); }
3592 | '(' abstract_array ')' // redundant parenthesis
3593 { $$ = $2; }
3594 ;
3595
3596abstract_function:
3597 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3598 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3599 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3600 { $$ = $2->addParamList( $6 ); }
3601 | '(' abstract_function ')' // redundant parenthesis
3602 { $$ = $2; }
3603 ;
3604
3605array_dimension:
3606 // Only the first dimension can be empty.
3607 '[' ']'
3608 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3609 | '[' ']' multi_array_dimension
3610 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
3611 | '[' push assignment_expression pop ',' comma_expression ']'
3612 { $$ = DeclarationNode::newArray( $3, 0, false )->addArray( DeclarationNode::newArray( $6, 0, false ) ); }
3613 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3614 | multi_array_dimension
3615 ;
3616
3617multi_array_dimension:
3618 '[' push assignment_expression pop ']'
3619 { $$ = DeclarationNode::newArray( $3, 0, false ); }
3620 | '[' push '*' pop ']' // C99
3621 { $$ = DeclarationNode::newVarArray( 0 ); }
3622 | multi_array_dimension '[' push assignment_expression pop ']'
3623 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
3624 | multi_array_dimension '[' push '*' pop ']' // C99
3625 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3626 ;
3627
3628// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3629// identifier to which the type applies, e.g.:
3630//
3631// int f( int ); // not handled here
3632// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3633// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3634// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3635//
3636// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3637// and functions versus pointers to arrays and functions. In addition, the pattern handles the
3638// special meaning of parenthesis around a typedef name:
3639//
3640// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
3641// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
3642// not as redundant parentheses around the identifier."
3643//
3644// For example:
3645//
3646// typedef float T;
3647// int f( int ( T [5] ) ); // see abstract_parameter_declarator
3648// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
3649// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
3650// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
3651//
3652// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
3653// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
3654// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
3655// functions.
3656
3657abstract_parameter_declarator:
3658 abstract_parameter_ptr
3659 | '&' MUTEX attribute_list_opt
3660 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
3661 | abstract_parameter_array attribute_list_opt
3662 { $$ = $1->addQualifiers( $2 ); }
3663 | abstract_parameter_function attribute_list_opt
3664 { $$ = $1->addQualifiers( $2 ); }
3665 ;
3666
3667abstract_parameter_ptr:
3668 ptrref_operator
3669 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3670 | ptrref_operator type_qualifier_list
3671 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3672 | ptrref_operator abstract_parameter_declarator
3673 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3674 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3675 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3676 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3677 { $$ = $2->addQualifiers( $4 ); }
3678 ;
3679
3680abstract_parameter_array:
3681 array_parameter_dimension
3682 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3683 { $$ = $2->addArray( $4 ); }
3684 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3685 { $$ = $2->addArray( $4 ); }
3686 | '(' abstract_parameter_array ')' // redundant parenthesis
3687 { $$ = $2; }
3688 ;
3689
3690abstract_parameter_function:
3691 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3692 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3693 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3694 { $$ = $2->addParamList( $6 ); }
3695 | '(' abstract_parameter_function ')' // redundant parenthesis
3696 { $$ = $2; }
3697 ;
3698
3699array_parameter_dimension:
3700 // Only the first dimension can be empty or have qualifiers.
3701 array_parameter_1st_dimension
3702 | array_parameter_1st_dimension multi_array_dimension
3703 { $$ = $1->addArray( $2 ); }
3704 | multi_array_dimension
3705 ;
3706
3707// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3708//
3709// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3710// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3711
3712array_parameter_1st_dimension:
3713 '[' ']'
3714 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3715 // multi_array_dimension handles the '[' '*' ']' case
3716 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3717 { $$ = DeclarationNode::newVarArray( $3 ); }
3718 | '[' push type_qualifier_list pop ']'
3719 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3720 // multi_array_dimension handles the '[' assignment_expression ']' case
3721 | '[' push type_qualifier_list assignment_expression pop ']'
3722 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3723 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3724 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3725 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3726 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3727 ;
3728
3729// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3730//
3731// struct S {
3732// int;
3733// int *;
3734// int [10];
3735// int (*)();
3736// };
3737
3738variable_abstract_declarator:
3739 variable_abstract_ptr
3740 | variable_abstract_array attribute_list_opt
3741 { $$ = $1->addQualifiers( $2 ); }
3742 | variable_abstract_function attribute_list_opt
3743 { $$ = $1->addQualifiers( $2 ); }
3744 ;
3745
3746variable_abstract_ptr:
3747 ptrref_operator
3748 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3749 | ptrref_operator type_qualifier_list
3750 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3751 | ptrref_operator variable_abstract_declarator
3752 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3753 | ptrref_operator type_qualifier_list variable_abstract_declarator
3754 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3755 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
3756 { $$ = $2->addQualifiers( $4 ); }
3757 ;
3758
3759variable_abstract_array:
3760 array_dimension
3761 | '(' variable_abstract_ptr ')' array_dimension
3762 { $$ = $2->addArray( $4 ); }
3763 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3764 { $$ = $2->addArray( $4 ); }
3765 | '(' variable_abstract_array ')' // redundant parenthesis
3766 { $$ = $2; }
3767 ;
3768
3769variable_abstract_function:
3770 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3771 { $$ = $2->addParamList( $6 ); }
3772 | '(' variable_abstract_function ')' // redundant parenthesis
3773 { $$ = $2; }
3774 ;
3775
3776// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3777// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3778
3779cfa_identifier_parameter_declarator_tuple: // CFA
3780 cfa_identifier_parameter_declarator_no_tuple
3781 | cfa_abstract_tuple
3782 | type_qualifier_list cfa_abstract_tuple
3783 { $$ = $2->addQualifiers( $1 ); }
3784 ;
3785
3786cfa_identifier_parameter_declarator_no_tuple: // CFA
3787 cfa_identifier_parameter_ptr
3788 | cfa_identifier_parameter_array
3789 ;
3790
3791cfa_identifier_parameter_ptr: // CFA
3792 // No SUE declaration in parameter list.
3793 ptrref_operator type_specifier_nobody
3794 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3795 | type_qualifier_list ptrref_operator type_specifier_nobody
3796 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3797 | ptrref_operator cfa_abstract_function
3798 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3799 | type_qualifier_list ptrref_operator cfa_abstract_function
3800 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3801 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3802 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3803 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3804 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3805 ;
3806
3807cfa_identifier_parameter_array: // CFA
3808 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3809 // shift/reduce conflict with new-style empty (void) function return type.
3810 '[' ']' type_specifier_nobody
3811 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3812 | cfa_array_parameter_1st_dimension type_specifier_nobody
3813 { $$ = $2->addNewArray( $1 ); }
3814 | '[' ']' multi_array_dimension type_specifier_nobody
3815 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3816 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3817 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3818 | multi_array_dimension type_specifier_nobody
3819 { $$ = $2->addNewArray( $1 ); }
3820
3821 | '[' ']' cfa_identifier_parameter_ptr
3822 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3823 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3824 { $$ = $2->addNewArray( $1 ); }
3825 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3826 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3827 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3828 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3829 | multi_array_dimension cfa_identifier_parameter_ptr
3830 { $$ = $2->addNewArray( $1 ); }
3831 ;
3832
3833cfa_array_parameter_1st_dimension:
3834 '[' push type_qualifier_list '*' pop ']' // remaining C99
3835 { $$ = DeclarationNode::newVarArray( $3 ); }
3836 | '[' push type_qualifier_list assignment_expression pop ']'
3837 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3838 | '[' push declaration_qualifier_list assignment_expression pop ']'
3839 // declaration_qualifier_list must be used because of shift/reduce conflict with
3840 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3841 // appear in this context.
3842 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3843 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3844 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3845 ;
3846
3847// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3848// identifier to which the type applies, e.g.:
3849//
3850// [int] f( int ); // abstract variable parameter; no parameter name specified
3851// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3852//
3853// These rules need LR(3):
3854//
3855// cfa_abstract_tuple identifier_or_type_name
3856// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
3857//
3858// since a function return type can be syntactically identical to a tuple type:
3859//
3860// [int, int] t;
3861// [int, int] f( int );
3862//
3863// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3864// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3865// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3866// duplicated when appearing with cfa_function_specifier.
3867
3868cfa_abstract_declarator_tuple: // CFA
3869 cfa_abstract_tuple
3870 | type_qualifier_list cfa_abstract_tuple
3871 { $$ = $2->addQualifiers( $1 ); }
3872 | cfa_abstract_declarator_no_tuple
3873 ;
3874
3875cfa_abstract_declarator_no_tuple: // CFA
3876 cfa_abstract_ptr
3877 | cfa_abstract_array
3878 ;
3879
3880cfa_abstract_ptr: // CFA
3881 ptrref_operator type_specifier
3882 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3883 | type_qualifier_list ptrref_operator type_specifier
3884 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3885 | ptrref_operator cfa_abstract_function
3886 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3887 | type_qualifier_list ptrref_operator cfa_abstract_function
3888 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3889 | ptrref_operator cfa_abstract_declarator_tuple
3890 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3891 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3892 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3893 ;
3894
3895cfa_abstract_array: // CFA
3896 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3897 // empty (void) function return type.
3898 '[' ']' type_specifier
3899 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3900 | '[' ']' multi_array_dimension type_specifier
3901 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3902 | multi_array_dimension type_specifier
3903 { $$ = $2->addNewArray( $1 ); }
3904 | '[' ']' cfa_abstract_ptr
3905 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3906 | '[' ']' multi_array_dimension cfa_abstract_ptr
3907 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3908 | multi_array_dimension cfa_abstract_ptr
3909 { $$ = $2->addNewArray( $1 ); }
3910 ;
3911
3912cfa_abstract_tuple: // CFA
3913 '[' push cfa_abstract_parameter_list pop ']'
3914 { $$ = DeclarationNode::newTuple( $3 ); }
3915 | '[' push type_specifier_nobody ELLIPSIS pop ']'
3916 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3917 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
3918 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3919 ;
3920
3921cfa_abstract_function: // CFA
3922// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
3923// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3924 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
3925 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3926 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
3927 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3928 ;
3929
3930// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3931// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3932//
3933// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3934// the declaration specifiers in a declaration is an obsolescent feature."
3935//
3936// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3937// prototype-format parameter type declarators) is an obsolescent feature."
3938//
3939// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3940// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3941
3942//************************* MISCELLANEOUS ********************************
3943
3944comma_opt: // redundant comma
3945 // empty
3946 | ','
3947 ;
3948
3949default_initializer_opt:
3950 // empty
3951 { $$ = nullptr; }
3952 | '=' assignment_expression
3953 { $$ = $2; }
3954 ;
3955
3956%%
3957
3958// ----end of grammar----
3959
3960// Local Variables: //
3961// mode: c++ //
3962// tab-width: 4 //
3963// compile-command: "make install" //
3964// End: //
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