source: src/Parser/parser.yy@ 79debb02

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 79debb02 was 6a99803, checked in by Peter A. Buhr <pabuhr@…>, 5 years ago

add parsing for new array declaration and subscript
  • Property mode set to 100644
File size: 139.2 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// parser.yy --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Feb 3 18:30:12 2021
13// Update Count : 4700
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// 1. designation with '=' (use ':' instead)
29//
30// Most of the syntactic extensions from ANSI90 to ANSI11 C are marked with the comment "C99/C11". This grammar also has
31// two levels of extensions. The first extensions cover most of the GCC C extensions, except for:
32//
33// 1. designation with and without '=' (use ':' instead)
34// 2. attributes not allowed in parenthesis of declarator
35//
36// All of the syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall
37// (CFA), which fixes several of C's outstanding problems and extends C with many modern language concepts. All of the
38// syntactic extensions for CFA C are marked with the comment "CFA". As noted above, there is one unreconcileable
39// parsing problem between C99 and CFA with respect to designators; this is discussed in detail before the "designation"
40// grammar rule.
41
42%{
43#define YYDEBUG_LEXER_TEXT( yylval ) // lexer loads this up each time
44#define YYDEBUG 1 // get the pretty debugging code to compile
45#define YYERROR_VERBOSE // more information in syntax errors
46
47#undef __GNUC_MINOR__
48
49#include <cstdio>
50#include <stack>
51using namespace std;
52
53#include "SynTree/Declaration.h"
54#include "ParseNode.h"
55#include "TypedefTable.h"
56#include "TypeData.h"
57#include "SynTree/LinkageSpec.h"
58#include "Common/SemanticError.h" // error_str
59#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
60
61extern DeclarationNode * parseTree;
62extern LinkageSpec::Spec linkage;
63extern TypedefTable typedefTable;
64
65stack<LinkageSpec::Spec> linkageStack;
66
67bool appendStr( string & to, string & from ) {
68 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
69 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
70 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
71 // easier to let the C compiler handle this case.
72 //
73 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
74 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
75 // i.e., u"a" U"b" L"c" is disallowed.
76
77 if ( from[0] != '"' ) { // encoding ?
78 if ( to[0] != '"' ) { // encoding ?
79 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
80 yyerror( "non-matching string encodings for string-literal concatenation" );
81 return false; // parse error, must call YYERROR in action
82 } else if ( from[1] == '8' ) {
83 from.erase( 0, 1 ); // remove 2nd encoding
84 } // if
85 } else {
86 if ( from[1] == '8' ) { // move encoding to start
87 to = "u8" + to;
88 from.erase( 0, 1 ); // remove 2nd encoding
89 } else {
90 to = from[0] + to;
91 } // if
92 } // if
93 from.erase( 0, 1 ); // remove 2nd encoding
94 } // if
95 to += " " + from; // concatenated into single string
96 return true;
97} // appendStr
98
99DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) {
100 // distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__.
101 DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( specifier );
102 for ( cur = dynamic_cast<DeclarationNode *>( cur->get_next() ); cur != nullptr; cur = dynamic_cast<DeclarationNode *>( cur->get_next() ) ) {
103 cl->cloneBaseType( cur );
104 } // for
105 declList->addType( cl );
106 return declList;
107} // distAttr
108
109void distExt( DeclarationNode * declaration ) {
110 // distribute EXTENSION across all declarations
111 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
112 iter->set_extension( true );
113 } // for
114} // distExt
115
116void distInl( DeclarationNode * declaration ) {
117 // distribute EXTENSION across all declarations
118 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
119 iter->set_inLine( true );
120 } // for
121} // distInl
122
123void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
124 // distribute qualifiers across all non-variable declarations in a distribution statemement
125 for ( DeclarationNode * iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
126 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
127 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
128 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
129 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
130 DeclarationNode * clone = qualifiers->clone();
131 if ( qualifiers->type ) { // forall clause ? (handles SC)
132 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
133 swap( clone->type->forall, iter->type->aggregate.params );
134 iter->addQualifiers( clone );
135 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
136 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
137 DeclarationNode newnode;
138 swap( newnode.type, iter->type->aggInst.aggregate );
139 swap( clone->type->forall, newnode.type->aggregate.params );
140 newnode.addQualifiers( clone );
141 swap( newnode.type, iter->type->aggInst.aggregate );
142 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
143 swap( clone->type->forall, iter->type->forall );
144 iter->addQualifiers( clone );
145 } // if
146 } else { // just SC qualifiers
147 iter->addQualifiers( clone );
148 } // if
149 } // for
150 delete qualifiers;
151} // distQual
152
153// There is an ambiguity for inline generic-routine return-types and generic routines.
154// forall( otype T ) struct S { int i; } bar( T ) {}
155// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
156// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
157// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
158// forall( otype T ) struct S { int T; };
159// forall( otype W ) bar( W ) {}
160
161void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
162 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
163 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
164 declSpec->type->aggregate.params = nullptr;
165 } // if
166} // rebindForall
167
168string * build_postfix_name( string * name ) {
169 *name = string("__postfix_func_") + *name;
170 return name;
171} // build_postfix_name
172
173DeclarationNode * fieldDecl( DeclarationNode * typeSpec, DeclarationNode * fieldList ) {
174 if ( ! fieldList ) { // field declarator ?
175 if ( ! ( typeSpec->type && (typeSpec->type->kind == TypeData::Aggregate || typeSpec->type->kind == TypeData::Enum) ) ) {
176 stringstream ss;
177 typeSpec->type->print( ss );
178 SemanticWarning( yylloc, Warning::SuperfluousDecl, ss.str().c_str() );
179 return nullptr;
180 } // if
181 fieldList = DeclarationNode::newName( nullptr );
182 } // if
183 return distAttr( typeSpec, fieldList ); // mark all fields in list
184} // fieldDecl
185
186ForCtrl * forCtrl( ExpressionNode * type, string * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
187 ConstantExpr * constant = dynamic_cast<ConstantExpr *>(type->expr.get());
188 if ( constant && (constant->get_constant()->get_value() == "0" || constant->get_constant()->get_value() == "1") ) {
189 type = new ExpressionNode( new CastExpr( maybeMoveBuild<Expression>(type), new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ) );
190 } // if
191 return new ForCtrl(
192 distAttr( DeclarationNode::newTypeof( type, true ), DeclarationNode::newName( index )->addInitializer( new InitializerNode( start ) ) ),
193 // NULL comp/inc => leave blank
194 comp ? new ExpressionNode( build_binary_val( compop, new ExpressionNode( build_varref( new string( *index ) ) ), comp ) ) : 0,
195 inc ? new ExpressionNode( build_binary_val( compop == OperKinds::LThan || compop == OperKinds::LEThan ? // choose += or -= for upto/downto
196 OperKinds::PlusAssn : OperKinds::MinusAssn, new ExpressionNode( build_varref( new string( *index ) ) ), inc ) ) : 0 );
197} // forCtrl
198
199ForCtrl * forCtrl( ExpressionNode * type, ExpressionNode * index, ExpressionNode * start, enum OperKinds compop, ExpressionNode * comp, ExpressionNode * inc ) {
200 if ( NameExpr * identifier = dynamic_cast<NameExpr *>(index->expr.get()) ) {
201 return forCtrl( type, new string( identifier->name ), start, compop, comp, inc );
202 } else if ( CommaExpr * commaExpr = dynamic_cast<CommaExpr *>(index->expr.get()) ) {
203 if ( NameExpr * identifier = dynamic_cast<NameExpr *>(commaExpr->arg1 ) ) {
204 return forCtrl( type, new string( identifier->name ), start, compop, comp, inc );
205 } else {
206 SemanticError( yylloc, "Expression disallowed. Only loop-index name allowed." ); return nullptr;
207 } // if
208 } else {
209 SemanticError( yylloc, "Expression disallowed. Only loop-index name allowed." ); return nullptr;
210 } // if
211} // forCtrl
212
213bool forall = false, yyy = false; // aggregate have one or more forall qualifiers ?
214
215// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
216#define YYLLOC_DEFAULT(Cur, Rhs, N) \
217if ( N ) { \
218 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
219 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
220 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
221 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
222 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
223} else { \
224 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
225 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
226 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
227}
228%}
229
230%define parse.error verbose
231
232// Types declaration for productions
233%union {
234 Token tok;
235 ParseNode * pn;
236 ExpressionNode * en;
237 DeclarationNode * decl;
238 AggregateDecl::Aggregate aggKey;
239 TypeDecl::Kind tclass;
240 StatementNode * sn;
241 WaitForStmt * wfs;
242 Expression * constant;
243 IfCtrl * ifctl;
244 ForCtrl * fctl;
245 enum OperKinds compop;
246 LabelNode * label;
247 InitializerNode * in;
248 OperKinds op;
249 std::string * str;
250 bool flag;
251 CatchStmt::Kind catch_kind;
252 GenericExpr * genexpr;
253}
254
255//************************* TERMINAL TOKENS ********************************
256
257// keywords
258%token TYPEDEF
259%token EXTERN STATIC AUTO REGISTER
260%token THREADLOCAL // C11
261%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
262%token NORETURN // C11
263%token CONST VOLATILE
264%token RESTRICT // C99
265%token ATOMIC // C11
266%token FORALL MUTEX VIRTUAL COERCE // CFA
267%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
268%token BOOL COMPLEX IMAGINARY // C99
269%token INT128 UINT128 uuFLOAT80 uuFLOAT128 // GCC
270%token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
271%token ZERO_T ONE_T // CFA
272%token VALIST // GCC
273%token AUTO_TYPE // GCC
274%token TYPEOF BASETYPEOF LABEL // GCC
275%token ENUM STRUCT UNION
276%token EXCEPTION // CFA
277%token GENERATOR COROUTINE MONITOR THREAD // CFA
278%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
279%token SIZEOF OFFSETOF
280// %token RESUME // CFA
281%token SUSPEND // CFA
282%token ATTRIBUTE EXTENSION // GCC
283%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
284%token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA
285%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
286%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
287
288// names and constants: lexer differentiates between identifier and typedef names
289%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
290%token<tok> TIMEOUT WOR
291%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
292%token<tok> DIRECTIVE
293// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
294// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
295// converted into the tuple index (.)(1). e.g., 3.x
296%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
297
298// multi-character operators
299%token ARROW // ->
300%token ICR DECR // ++ --
301%token LS RS // << >>
302%token LE GE EQ NE // <= >= == !=
303%token ANDAND OROR // && ||
304%token ELLIPSIS // ...
305
306%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
307%token PLUSassign MINUSassign // += -=
308%token LSassign RSassign // <<= >>=
309%token ANDassign ERassign ORassign // &= ^= |=
310
311%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
312%token ATassign // @=
313
314%type<tok> identifier
315%type<tok> identifier_or_type_name attr_name
316%type<tok> quasi_keyword
317%type<constant> string_literal
318%type<str> string_literal_list
319
320// expressions
321%type<en> constant
322%type<en> tuple tuple_expression_list
323%type<op> ptrref_operator unary_operator assignment_operator
324%type<en> primary_expression postfix_expression unary_expression
325%type<en> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
326%type<en> shift_expression relational_expression equality_expression
327%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
328%type<en> logical_AND_expression logical_OR_expression
329%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
330%type<en> comma_expression comma_expression_opt
331%type<en> argument_expression_list_opt argument_expression default_initializer_opt
332%type<ifctl> if_control_expression
333%type<fctl> for_control_expression for_control_expression_list
334%type<compop> inclexcl
335%type<en> subrange
336%type<decl> asm_name_opt
337%type<en> asm_operands_opt asm_operands_list asm_operand
338%type<label> label_list
339%type<en> asm_clobbers_list_opt
340%type<flag> asm_volatile_opt
341%type<en> handler_predicate_opt
342%type<genexpr> generic_association generic_assoc_list
343
344// statements
345%type<sn> statement labeled_statement compound_statement
346%type<sn> statement_decl statement_decl_list statement_list_nodecl
347%type<sn> selection_statement if_statement
348%type<sn> switch_clause_list_opt switch_clause_list
349%type<en> case_value
350%type<sn> case_clause case_value_list case_label case_label_list
351%type<sn> iteration_statement jump_statement
352%type<sn> expression_statement asm_statement
353%type<sn> with_statement
354%type<en> with_clause_opt
355%type<sn> exception_statement handler_clause finally_clause
356%type<catch_kind> handler_key
357%type<sn> mutex_statement
358%type<en> when_clause when_clause_opt waitfor timeout
359%type<sn> waitfor_statement
360%type<wfs> waitfor_clause
361
362// declarations
363%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
364%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
365%type<decl> abstract_parameter_declaration
366
367%type<aggKey> aggregate_key aggregate_data aggregate_control
368%type<decl> aggregate_type aggregate_type_nobody
369
370%type<decl> assertion assertion_list assertion_list_opt
371
372%type<en> bit_subrange_size_opt bit_subrange_size
373
374%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
375
376%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
377
378%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
379%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
380
381%type<decl> elaborated_type elaborated_type_nobody
382
383%type<decl> enumerator_list enum_type enum_type_nobody
384%type<en> enumerator_value_opt
385
386%type<decl> external_definition external_definition_list external_definition_list_opt
387
388%type<decl> exception_declaration
389
390%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
391%type<en> field field_name_list field_name fraction_constants_opt
392
393%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
394
395%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
396%type<decl> identifier_list
397
398%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
399%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
400%type<decl> cfa_abstract_ptr cfa_abstract_tuple
401
402%type<decl> cfa_array_parameter_1st_dimension
403
404%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
405%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
406
407%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
408%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
409
410%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
411
412%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
413
414%type<decl> c_declaration static_assert
415%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
416%type<decl> KR_parameter_list KR_parameter_list_opt
417
418%type<decl> parameter_declaration parameter_list parameter_type_list_opt
419
420%type<decl> paren_identifier paren_type
421
422%type<decl> storage_class storage_class_list
423
424%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
425
426%type<tclass> type_class new_type_class
427%type<decl> type_declarator type_declarator_name type_declaring_list
428
429%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
430%type<decl> typedef typedef_declaration typedef_expression
431
432%type<decl> variable_type_redeclarator type_ptr type_array type_function
433
434%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
435
436%type<decl> type type_no_function
437%type<decl> type_parameter type_parameter_list type_initializer_opt
438
439%type<en> type_parameters_opt type_list
440
441%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
442%type<decl> type_specifier type_specifier_nobody enum_specifier_nobody
443
444%type<decl> variable_declarator variable_ptr variable_array variable_function
445%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
446
447%type<decl> attribute_list_opt attribute_list attribute_opt attribute attribute_name_list attribute_name
448
449// initializers
450%type<in> initializer initializer_list_opt initializer_opt
451
452// designators
453%type<en> designator designator_list designation
454
455
456// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
457// .---------. matches IF '(' comma_expression ')' statement . (reduce)
458// if ( C ) S1 else S2
459// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
460// Similar issues exit with the waitfor statement.
461
462// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
463// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
464%precedence THEN // rule precedence for IF/WAITFOR statement
465%precedence WOR // token precedence for start of WOR in WAITFOR statement
466%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
467%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
468
469// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
470// forall( otype T ) struct Foo { T v; };
471// .-----. matches pointer to function returning a generic (which is impossible without a type)
472// Foo ( *fp )( int );
473// `---' matches start of TYPEGENname '('
474// must be:
475// Foo( int ) ( *fp )( int );
476// The same problem occurs here:
477// forall( otype T ) struct Foo { T v; } ( *fp )( int );
478// must be:
479// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
480
481// Order of these lines matters (low-to-high precedence).
482%precedence TYPEGENname
483%precedence '}'
484%precedence '('
485
486// %precedence RESUME
487// %precedence '{'
488// %precedence ')'
489
490%locations // support location tracking for error messages
491
492%start translation_unit // parse-tree root
493
494%%
495//************************* Namespace Management ********************************
496
497// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
498// which are lexically identical.
499//
500// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
501// foo f; // to allow it to appear in this context
502//
503// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
504// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
505// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
506// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
507// must be distinguished by the lexical scanner.
508//
509// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
510// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
511// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
512// each context that introduces a name scope, a new level is created in the type table and that level is popped on
513// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
514// This requires distinguishing between type names that are local to the current declaration scope and those that
515// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
516//
517// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
518// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
519// around the list separator.
520//
521// int f( forall(T) T (*f1) T , forall( S ) S (*f2)( S ) );
522// push pop push pop
523
524push:
525 { typedefTable.enterScope(); }
526 ;
527
528pop:
529 { typedefTable.leaveScope(); }
530 ;
531
532//************************* CONSTANTS ********************************
533
534constant:
535 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
536 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
537 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
538 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
539 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
540 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
541 ;
542
543quasi_keyword: // CFA
544 TIMEOUT
545 | WOR
546 ;
547
548identifier:
549 IDENTIFIER
550 | quasi_keyword
551 | '@' // CFA
552 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
553 ;
554
555string_literal:
556 string_literal_list { $$ = build_constantStr( *$1 ); }
557 ;
558
559string_literal_list: // juxtaposed strings are concatenated
560 STRINGliteral { $$ = $1; } // conversion from tok to str
561 | string_literal_list STRINGliteral
562 {
563 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
564 delete $2; // allocated by lexer
565 $$ = $1; // conversion from tok to str
566 }
567 ;
568
569//************************* EXPRESSIONS ********************************
570
571primary_expression:
572 IDENTIFIER // typedef name cannot be used as a variable name
573 { $$ = new ExpressionNode( build_varref( $1 ) ); }
574 | quasi_keyword
575 { $$ = new ExpressionNode( build_varref( $1 ) ); }
576 | tuple
577 | '(' comma_expression ')'
578 { $$ = $2; }
579 | '(' compound_statement ')' // GCC, lambda expression
580 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast<CompoundStmt *>(maybeMoveBuild<Statement>($2) ) ) ); }
581 | type_name '.' identifier // CFA, nested type
582 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
583 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
584 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
585 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
586 {
587 // add the missing control expression to the GenericExpr and return it
588 $5->control = maybeMoveBuild<Expression>( $3 );
589 $$ = new ExpressionNode( $5 );
590 }
591 // | RESUME '(' comma_expression ')'
592 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
593 // | RESUME '(' comma_expression ')' compound_statement
594 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
595 ;
596
597generic_assoc_list: // C11
598 generic_association
599 | generic_assoc_list ',' generic_association
600 {
601 // steal the association node from the singleton and delete the wrapper
602 $1->associations.splice($1->associations.end(), $3->associations);
603 delete $3;
604 $$ = $1;
605 }
606 ;
607
608generic_association: // C11
609 type_no_function ':' assignment_expression
610 {
611 // create a GenericExpr wrapper with one association pair
612 $$ = new GenericExpr( nullptr, { { maybeMoveBuildType($1), maybeMoveBuild<Expression>( $3 ) } } );
613 }
614 | DEFAULT ':' assignment_expression
615 { $$ = new GenericExpr( nullptr, { { maybeMoveBuild<Expression>( $3 ) } } ); }
616 ;
617
618postfix_expression:
619 primary_expression
620 | postfix_expression '[' assignment_expression ',' comma_expression ']'
621 // { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, new ExpressionNode( build_binary_val( OperKinds::Index, $3, $5 ) ) ) ); }
622 { SemanticError( yylloc, "New array subscript is currently unimplemented." ); $$ = nullptr; }
623 | postfix_expression '[' assignment_expression ']'
624 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
625 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
626 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
627 // equivalent to the old x[i,j].
628 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
629 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
630 {
631 Token fn;
632 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
633 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
634 }
635 | postfix_expression '(' argument_expression_list_opt ')'
636 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
637 | postfix_expression '`' identifier // CFA, postfix call
638 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
639 | constant '`' identifier // CFA, postfix call
640 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
641 | string_literal '`' identifier // CFA, postfix call
642 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), new ExpressionNode( $1 ) ) ); }
643 | postfix_expression '.' identifier
644 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
645 | postfix_expression '.' INTEGERconstant // CFA, tuple index
646 { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); }
647 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
648 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
649 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
650 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
651 | postfix_expression '.' aggregate_control
652 { $$ = new ExpressionNode( build_keyword_cast( $3, $1 ) ); }
653 | postfix_expression ARROW identifier
654 { $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
655 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
656 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
657 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
658 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
659 | postfix_expression ICR
660 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
661 | postfix_expression DECR
662 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
663 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
664 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
665 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
666 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
667 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
668 {
669 Token fn;
670 fn.str = new string( "^?{}" ); // location undefined
671 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
672 }
673 ;
674
675argument_expression_list_opt:
676 // empty
677 { $$ = nullptr; }
678 | argument_expression
679 | argument_expression_list_opt ',' argument_expression
680 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
681 ;
682
683argument_expression:
684 '@' // CFA, default parameter
685 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
686 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
687 | assignment_expression
688 ;
689
690field_name_list: // CFA, tuple field selector
691 field
692 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
693 ;
694
695field: // CFA, tuple field selector
696 field_name
697 | FLOATING_DECIMALconstant field
698 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
699 | FLOATING_DECIMALconstant '[' field_name_list ']'
700 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); }
701 | field_name '.' field
702 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
703 | field_name '.' '[' field_name_list ']'
704 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
705 | field_name ARROW field
706 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
707 | field_name ARROW '[' field_name_list ']'
708 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
709 ;
710
711field_name:
712 INTEGERconstant fraction_constants_opt
713 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
714 | FLOATINGconstant fraction_constants_opt
715 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
716 | identifier fraction_constants_opt
717 {
718 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
719 }
720 ;
721
722fraction_constants_opt:
723 // empty
724 { $$ = nullptr; }
725 | fraction_constants_opt FLOATING_FRACTIONconstant
726 {
727 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
728 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
729 }
730 ;
731
732unary_expression:
733 postfix_expression
734 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
735 // semantics checks, e.g., ++3, 3--, *3, &&3
736 | constant
737 | string_literal
738 { $$ = new ExpressionNode( $1 ); }
739 | EXTENSION cast_expression // GCC
740 { $$ = $2->set_extension( true ); }
741 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
742 // { * X; } // dereference X
743 // { * int X; } // CFA declaration of pointer to int
744 | ptrref_operator cast_expression // CFA
745 {
746 switch ( $1 ) {
747 case OperKinds::AddressOf:
748 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) );
749 break;
750 case OperKinds::PointTo:
751 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
752 break;
753 case OperKinds::And:
754 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) ) );
755 break;
756 default:
757 assert( false );
758 }
759 }
760 | unary_operator cast_expression
761 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
762 | ICR unary_expression
763 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
764 | DECR unary_expression
765 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
766 | SIZEOF unary_expression
767 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
768 | SIZEOF '(' type_no_function ')'
769 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
770 | ALIGNOF unary_expression // GCC, variable alignment
771 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
772 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
773 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
774 | OFFSETOF '(' type_no_function ',' identifier ')'
775 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
776 ;
777
778ptrref_operator:
779 '*' { $$ = OperKinds::PointTo; }
780 | '&' { $$ = OperKinds::AddressOf; }
781 // GCC, address of label must be handled by semantic check for ref,ref,label
782 | ANDAND { $$ = OperKinds::And; }
783 ;
784
785unary_operator:
786 '+' { $$ = OperKinds::UnPlus; }
787 | '-' { $$ = OperKinds::UnMinus; }
788 | '!' { $$ = OperKinds::Neg; }
789 | '~' { $$ = OperKinds::BitNeg; }
790 ;
791
792cast_expression:
793 unary_expression
794 | '(' type_no_function ')' cast_expression
795 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
796 | '(' aggregate_control '&' ')' cast_expression // CFA
797 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
798 | '(' VIRTUAL ')' cast_expression // CFA
799 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $4 ), maybeMoveBuildType( nullptr ) ) ); }
800 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
801 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $5 ), maybeMoveBuildType( $3 ) ) ); }
802 | '(' RETURN type_no_function ')' cast_expression // CFA
803 { SemanticError( yylloc, "Return cast is currently unimplemented." ); $$ = nullptr; }
804 | '(' COERCE type_no_function ')' cast_expression // CFA
805 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
806 | '(' qualifier_cast_list ')' cast_expression // CFA
807 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
808// | '(' type_no_function ')' tuple
809// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
810 ;
811
812qualifier_cast_list:
813 cast_modifier type_qualifier_name
814 | cast_modifier MUTEX
815 | qualifier_cast_list cast_modifier type_qualifier_name
816 | qualifier_cast_list cast_modifier MUTEX
817 ;
818
819cast_modifier:
820 '-'
821 | '+'
822 ;
823
824exponential_expression:
825 cast_expression
826 | exponential_expression '\\' cast_expression
827 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
828 ;
829
830multiplicative_expression:
831 exponential_expression
832 | multiplicative_expression '*' exponential_expression
833 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
834 | multiplicative_expression '/' exponential_expression
835 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
836 | multiplicative_expression '%' exponential_expression
837 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
838 ;
839
840additive_expression:
841 multiplicative_expression
842 | additive_expression '+' multiplicative_expression
843 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
844 | additive_expression '-' multiplicative_expression
845 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
846 ;
847
848shift_expression:
849 additive_expression
850 | shift_expression LS additive_expression
851 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
852 | shift_expression RS additive_expression
853 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
854 ;
855
856relational_expression:
857 shift_expression
858 | relational_expression '<' shift_expression
859 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
860 | relational_expression '>' shift_expression
861 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
862 | relational_expression LE shift_expression
863 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
864 | relational_expression GE shift_expression
865 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
866 ;
867
868equality_expression:
869 relational_expression
870 | equality_expression EQ relational_expression
871 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
872 | equality_expression NE relational_expression
873 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
874 ;
875
876AND_expression:
877 equality_expression
878 | AND_expression '&' equality_expression
879 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
880 ;
881
882exclusive_OR_expression:
883 AND_expression
884 | exclusive_OR_expression '^' AND_expression
885 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
886 ;
887
888inclusive_OR_expression:
889 exclusive_OR_expression
890 | inclusive_OR_expression '|' exclusive_OR_expression
891 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
892 ;
893
894logical_AND_expression:
895 inclusive_OR_expression
896 | logical_AND_expression ANDAND inclusive_OR_expression
897 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
898 ;
899
900logical_OR_expression:
901 logical_AND_expression
902 | logical_OR_expression OROR logical_AND_expression
903 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
904 ;
905
906conditional_expression:
907 logical_OR_expression
908 | logical_OR_expression '?' comma_expression ':' conditional_expression
909 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
910 // FIX ME: computes $1 twice
911 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
912 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
913 ;
914
915constant_expression:
916 conditional_expression
917 ;
918
919assignment_expression:
920 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
921 conditional_expression
922 | unary_expression assignment_operator assignment_expression
923 {
924// if ( $2 == OperKinds::AtAssn ) {
925// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
926// } else {
927 $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) );
928// } // if
929 }
930 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
931 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
932 ;
933
934assignment_expression_opt:
935 // empty
936 { $$ = nullptr; }
937 | assignment_expression
938 ;
939
940assignment_operator:
941 '=' { $$ = OperKinds::Assign; }
942 | ATassign { $$ = OperKinds::AtAssn; }
943 | EXPassign { $$ = OperKinds::ExpAssn; }
944 | MULTassign { $$ = OperKinds::MulAssn; }
945 | DIVassign { $$ = OperKinds::DivAssn; }
946 | MODassign { $$ = OperKinds::ModAssn; }
947 | PLUSassign { $$ = OperKinds::PlusAssn; }
948 | MINUSassign { $$ = OperKinds::MinusAssn; }
949 | LSassign { $$ = OperKinds::LSAssn; }
950 | RSassign { $$ = OperKinds::RSAssn; }
951 | ANDassign { $$ = OperKinds::AndAssn; }
952 | ERassign { $$ = OperKinds::ERAssn; }
953 | ORassign { $$ = OperKinds::OrAssn; }
954 ;
955
956tuple: // CFA, tuple
957 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
958 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
959// '[' ']'
960// { $$ = new ExpressionNode( build_tuple() ); }
961// | '[' push assignment_expression pop ']'
962// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
963 '[' ',' tuple_expression_list ']'
964 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
965 | '[' push assignment_expression pop ',' tuple_expression_list ']'
966 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)($3->set_last( $6 ) ) )); }
967 ;
968
969tuple_expression_list:
970 assignment_expression
971 | '@' // CFA
972 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
973 | tuple_expression_list ',' assignment_expression
974 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
975 | tuple_expression_list ',' '@'
976 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
977 ;
978
979comma_expression:
980 assignment_expression
981 | comma_expression ',' assignment_expression
982 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
983 ;
984
985comma_expression_opt:
986 // empty
987 { $$ = nullptr; }
988 | comma_expression
989 ;
990
991//*************************** STATEMENTS *******************************
992
993statement:
994 labeled_statement
995 | compound_statement
996 | expression_statement
997 | selection_statement
998 | iteration_statement
999 | jump_statement
1000 | with_statement
1001 | mutex_statement
1002 | waitfor_statement
1003 | exception_statement
1004 | enable_disable_statement
1005 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1006 | asm_statement
1007 | DIRECTIVE
1008 { $$ = new StatementNode( build_directive( $1 ) ); }
1009 ;
1010
1011labeled_statement:
1012 // labels cannot be identifiers 0 or 1
1013 identifier_or_type_name ':' attribute_list_opt statement
1014 { $$ = $4->add_label( $1, $3 ); }
1015 ;
1016
1017compound_statement:
1018 '{' '}'
1019 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
1020 | '{' push
1021 local_label_declaration_opt // GCC, local labels
1022 statement_decl_list // C99, intermix declarations and statements
1023 pop '}'
1024 { $$ = new StatementNode( build_compound( $4 ) ); }
1025 ;
1026
1027statement_decl_list: // C99
1028 statement_decl
1029 | statement_decl_list statement_decl
1030 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1031 ;
1032
1033statement_decl:
1034 declaration // CFA, new & old style declarations
1035 { $$ = new StatementNode( $1 ); }
1036 | EXTENSION declaration // GCC
1037 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1038 | function_definition
1039 { $$ = new StatementNode( $1 ); }
1040 | EXTENSION function_definition // GCC
1041 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1042 | statement
1043 ;
1044
1045statement_list_nodecl:
1046 statement
1047 | statement_list_nodecl statement
1048 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1049 ;
1050
1051expression_statement:
1052 comma_expression_opt ';'
1053 { $$ = new StatementNode( build_expr( $1 ) ); }
1054 ;
1055
1056selection_statement:
1057 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
1058 // the inherent S/R conflict with THEN/ELSE.
1059 push if_statement pop
1060 { $$ = $2; }
1061 | SWITCH '(' comma_expression ')' case_clause
1062 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
1063 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1064 {
1065 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
1066 // The semantics of the declaration list is changed to include associated initialization, which is performed
1067 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1068 // statement around the switch. Statements after the initial declaration list can never be executed, and
1069 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1070 // statement.
1071 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1072 }
1073 | CHOOSE '(' comma_expression ')' case_clause // CFA
1074 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
1075 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1076 {
1077 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
1078 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1079 }
1080 ;
1081
1082if_statement:
1083 IF '(' if_control_expression ')' statement %prec THEN
1084 // explicitly deal with the shift/reduce conflict on if/else
1085 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), nullptr ) ); }
1086 | IF '(' if_control_expression ')' statement ELSE statement
1087 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), maybe_build_compound( $7 ) ) ); }
1088 ;
1089
1090if_control_expression:
1091 comma_expression
1092 { $$ = new IfCtrl( nullptr, $1 ); }
1093 | c_declaration // no semi-colon
1094 { $$ = new IfCtrl( $1, nullptr ); }
1095 | cfa_declaration // no semi-colon
1096 { $$ = new IfCtrl( $1, nullptr ); }
1097 | declaration comma_expression // semi-colon separated
1098 { $$ = new IfCtrl( $1, $2 ); }
1099 ;
1100
1101// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1102// clause allows a list of values and subranges.
1103
1104case_value: // CFA
1105 constant_expression { $$ = $1; }
1106 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1107 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1108 | subrange // CFA, subrange
1109 ;
1110
1111case_value_list: // CFA
1112 case_value { $$ = new StatementNode( build_case( $1 ) ); }
1113 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1114 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
1115 ;
1116
1117case_label: // CFA
1118 CASE case_value_list ':' { $$ = $2; }
1119 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
1120 // A semantic check is required to ensure only one default clause per switch/choose statement.
1121 ;
1122
1123//label_list_opt:
1124// // empty
1125// | identifier_or_type_name ':'
1126// | label_list_opt identifier_or_type_name ':'
1127// ;
1128
1129case_label_list: // CFA
1130 case_label
1131 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
1132 ;
1133
1134case_clause: // CFA
1135 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( $2 ) ); }
1136 ;
1137
1138switch_clause_list_opt: // CFA
1139 // empty
1140 { $$ = nullptr; }
1141 | switch_clause_list
1142 ;
1143
1144switch_clause_list: // CFA
1145 case_label_list statement_list_nodecl
1146 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1147 | switch_clause_list case_label_list statement_list_nodecl
1148 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
1149 ;
1150
1151iteration_statement:
1152 WHILE '(' push if_control_expression ')' statement pop
1153 { $$ = new StatementNode( build_while( $4, maybe_build_compound( $6 ) ) ); }
1154 | WHILE '(' ')' statement // CFA => while ( 1 )
1155 { $$ = new StatementNode( build_while( new IfCtrl( nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ), maybe_build_compound( $4 ) ) ); }
1156 | DO statement WHILE '(' comma_expression ')' ';'
1157 { $$ = new StatementNode( build_do_while( $5, maybe_build_compound( $2 ) ) ); }
1158 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1159 { $$ = new StatementNode( build_do_while( new ExpressionNode( build_constantInteger( *new string( "1" ) ) ), maybe_build_compound( $2 ) ) ); }
1160 | FOR '(' push for_control_expression_list ')' statement pop
1161 { $$ = new StatementNode( build_for( $4, maybe_build_compound( $6 ) ) ); }
1162 | FOR '(' ')' statement // CFA => for ( ;; )
1163 { $$ = new StatementNode( build_for( new ForCtrl( (ExpressionNode * )nullptr, (ExpressionNode * )nullptr, (ExpressionNode * )nullptr ), maybe_build_compound( $4 ) ) ); }
1164 ;
1165
1166for_control_expression_list:
1167 for_control_expression
1168 | for_control_expression_list ':' for_control_expression
1169 // ForCtrl + ForCtrl:
1170 // init + init => multiple declaration statements that are hoisted
1171 // condition + condition => (expression) && (expression)
1172 // change + change => (expression), (expression)
1173 {
1174 $1->init->set_last( $3->init );
1175 if ( $1->condition ) {
1176 if ( $3->condition ) {
1177 $1->condition->expr.reset( new LogicalExpr( $1->condition->expr.release(), $3->condition->expr.release(), true ) );
1178 } // if
1179 } else $1->condition = $3->condition;
1180 if ( $1->change ) {
1181 if ( $3->change ) {
1182 $1->change->expr.reset( new CommaExpr( $1->change->expr.release(), $3->change->expr.release() ) );
1183 } // if
1184 } else $1->change = $3->change;
1185 $$ = $1;
1186 }
1187 ;
1188
1189for_control_expression:
1190 ';' comma_expression_opt ';' comma_expression_opt
1191 { $$ = new ForCtrl( (ExpressionNode * )nullptr, $2, $4 ); }
1192 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1193 { $$ = new ForCtrl( $1, $3, $5 ); }
1194 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1195 { $$ = new ForCtrl( $1, $2, $4 ); }
1196
1197 | comma_expression // CFA
1198 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1199 OperKinds::LThan, $1->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1200 | '=' comma_expression // CFA
1201 { $$ = forCtrl( $2, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1202 OperKinds::LEThan, $2->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1203 | comma_expression inclexcl comma_expression // CFA
1204 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1205 | comma_expression inclexcl comma_expression '~' comma_expression // CFA
1206 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, $5 ); }
1207 | comma_expression ';' // CFA
1208 { $$ = forCtrl( new ExpressionNode( build_constantInteger( *new string( "0u" ) ) ), $1, nullptr, OperKinds::LThan, nullptr, nullptr ); }
1209 | comma_expression ';' comma_expression // CFA
1210 { $$ = forCtrl( $3, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1211 OperKinds::LThan, $3->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1212 | comma_expression ';' '=' comma_expression // CFA
1213 { $$ = forCtrl( $4, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1214 OperKinds::LEThan, $4->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1215 | comma_expression ';' comma_expression inclexcl comma_expression // CFA
1216 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1217 | comma_expression ';' comma_expression inclexcl comma_expression '~' comma_expression // CFA
1218 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, $7 ); }
1219
1220 // There is a S/R conflicit if ~ and -~ are factored out.
1221 | comma_expression ';' comma_expression '~' '@' // CFA
1222 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1223 | comma_expression ';' comma_expression ErangeDown '@' // CFA
1224 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1225 | comma_expression ';' comma_expression '~' '@' '~' comma_expression // CFA
1226 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, $7 ); }
1227 | comma_expression ';' comma_expression ErangeDown '@' '~' comma_expression // CFA
1228 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, $7 ); }
1229 | comma_expression ';' comma_expression '~' '@' '~' '@' // CFA
1230 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, nullptr ); }
1231 ;
1232
1233inclexcl:
1234 '~'
1235 { $$ = OperKinds::LThan; }
1236 | ErangeUpEq
1237 { $$ = OperKinds::LEThan; }
1238 | ErangeDown
1239 { $$ = OperKinds::GThan; }
1240 | ErangeDownEq
1241 { $$ = OperKinds::GEThan; }
1242 ;
1243
1244jump_statement:
1245 GOTO identifier_or_type_name ';'
1246 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1247 | GOTO '*' comma_expression ';' // GCC, computed goto
1248 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1249 // whereas normal operator precedence yields goto (*i)+3;
1250 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1251 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1252 | fall_through_name ';' // CFA
1253 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1254 | fall_through_name identifier_or_type_name ';' // CFA
1255 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1256 | fall_through_name DEFAULT ';' // CFA
1257 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1258 | CONTINUE ';'
1259 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1260 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1261 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1262 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1263 // the target of the transfer appears only at the start of an iteration statement.
1264 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1265 | BREAK ';'
1266 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1267 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1268 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1269 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1270 // the target of the transfer appears only at the start of an iteration statement.
1271 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1272 | RETURN comma_expression_opt ';'
1273 { $$ = new StatementNode( build_return( $2 ) ); }
1274 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1275 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1276 | SUSPEND ';'
1277 { $$ = new StatementNode( build_suspend( nullptr ) ); }
1278 | SUSPEND compound_statement
1279 { $$ = new StatementNode( build_suspend( $2 ) ); }
1280 | SUSPEND COROUTINE ';'
1281 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Coroutine ) ); }
1282 | SUSPEND COROUTINE compound_statement
1283 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Coroutine ) ); }
1284 | SUSPEND GENERATOR ';'
1285 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Generator ) ); }
1286 | SUSPEND GENERATOR compound_statement
1287 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Generator ) ); }
1288 | THROW assignment_expression_opt ';' // handles rethrow
1289 { $$ = new StatementNode( build_throw( $2 ) ); }
1290 | THROWRESUME assignment_expression_opt ';' // handles reresume
1291 { $$ = new StatementNode( build_resume( $2 ) ); }
1292 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1293 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1294 ;
1295
1296fall_through_name: // CFA
1297 FALLTHRU
1298 | FALLTHROUGH
1299 ;
1300
1301with_statement:
1302 WITH '(' tuple_expression_list ')' statement
1303 {
1304 $$ = new StatementNode( build_with( $3, $5 ) );
1305 }
1306 ;
1307
1308// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1309mutex_statement:
1310 MUTEX '(' argument_expression_list_opt ')' statement
1311 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; }
1312 ;
1313
1314when_clause:
1315 WHEN '(' comma_expression ')' { $$ = $3; }
1316 ;
1317
1318when_clause_opt:
1319 // empty
1320 { $$ = nullptr; }
1321 | when_clause
1322 ;
1323
1324waitfor:
1325 WAITFOR '(' cast_expression ')'
1326 { $$ = $3; }
1327// | WAITFOR '(' cast_expression ',' argument_expression_list_opt ')'
1328// { $$ = (ExpressionNode *)$3->set_last( $5 ); }
1329 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1330 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1331 ;
1332
1333cast_expression_list:
1334 cast_expression
1335 | cast_expression_list ',' cast_expression
1336 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1337 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1338 ;
1339
1340timeout:
1341 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1342 ;
1343
1344waitfor_clause:
1345 when_clause_opt waitfor statement %prec THEN
1346 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1 ); }
1347 | when_clause_opt waitfor statement WOR waitfor_clause
1348 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1, $5 ); }
1349 | when_clause_opt timeout statement %prec THEN
1350 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1 ); }
1351 | when_clause_opt ELSE statement
1352 { $$ = build_waitfor_timeout( nullptr, maybe_build_compound( $3 ), $1 ); }
1353 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1354 | when_clause_opt timeout statement WOR ELSE statement
1355 { SemanticError( yylloc, "else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1356 | when_clause_opt timeout statement WOR when_clause ELSE statement
1357 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1, maybe_build_compound( $7 ), $5 ); }
1358 ;
1359
1360waitfor_statement:
1361 when_clause_opt waitfor statement %prec THEN
1362 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1363 | when_clause_opt waitfor statement WOR waitfor_clause
1364 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1365 ;
1366
1367exception_statement:
1368 TRY compound_statement handler_clause
1369 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1370 | TRY compound_statement finally_clause
1371 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1372 | TRY compound_statement handler_clause finally_clause
1373 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1374 ;
1375
1376handler_clause:
1377 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1378 { $$ = new StatementNode( build_catch( $1, $4, $6, $8 ) ); }
1379 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1380 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $5, $7, $9 ) ) ); }
1381 ;
1382
1383handler_predicate_opt:
1384 // empty
1385 { $$ = nullptr; }
1386 | ';' conditional_expression { $$ = $2; }
1387 ;
1388
1389handler_key:
1390 CATCH { $$ = CatchStmt::Terminate; }
1391 | CATCHRESUME { $$ = CatchStmt::Resume; }
1392 ;
1393
1394finally_clause:
1395 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1396 ;
1397
1398exception_declaration:
1399 // No SUE declaration in parameter list.
1400 type_specifier_nobody
1401 | type_specifier_nobody declarator
1402 { $$ = $2->addType( $1 ); }
1403 | type_specifier_nobody variable_abstract_declarator
1404 { $$ = $2->addType( $1 ); }
1405 | cfa_abstract_declarator_tuple identifier // CFA
1406 { $$ = $1->addName( $2 ); }
1407 | cfa_abstract_declarator_tuple // CFA
1408 ;
1409
1410enable_disable_statement:
1411 enable_disable_key identifier_list compound_statement
1412 ;
1413
1414enable_disable_key:
1415 ENABLE
1416 | DISABLE
1417 ;
1418
1419asm_statement:
1420 ASM asm_volatile_opt '(' string_literal ')' ';'
1421 { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
1422 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1423 { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
1424 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1425 { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); }
1426 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1427 { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
1428 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1429 { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
1430 ;
1431
1432asm_volatile_opt: // GCC
1433 // empty
1434 { $$ = false; }
1435 | VOLATILE
1436 { $$ = true; }
1437 ;
1438
1439asm_operands_opt: // GCC
1440 // empty
1441 { $$ = nullptr; } // use default argument
1442 | asm_operands_list
1443 ;
1444
1445asm_operands_list: // GCC
1446 asm_operand
1447 | asm_operands_list ',' asm_operand
1448 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1449 ;
1450
1451asm_operand: // GCC
1452 string_literal '(' constant_expression ')'
1453 { $$ = new ExpressionNode( new AsmExpr( nullptr, $1, maybeMoveBuild<Expression>( $3 ) ) ); }
1454 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1455 { $$ = new ExpressionNode( new AsmExpr( $2, $4, maybeMoveBuild<Expression>( $6 ) ) ); }
1456 ;
1457
1458asm_clobbers_list_opt: // GCC
1459 // empty
1460 { $$ = nullptr; } // use default argument
1461 | string_literal
1462 { $$ = new ExpressionNode( $1 ); }
1463 | asm_clobbers_list_opt ',' string_literal
1464 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( $3 ) )); }
1465 ;
1466
1467label_list:
1468 identifier
1469 {
1470 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1471 delete $1; // allocated by lexer
1472 }
1473 | label_list ',' identifier
1474 {
1475 $$ = $1; $1->labels.push_back( *$3 );
1476 delete $3; // allocated by lexer
1477 }
1478 ;
1479
1480//******************************* DECLARATIONS *********************************
1481
1482declaration_list_opt: // used at beginning of switch statement
1483 // empty
1484 { $$ = nullptr; }
1485 | declaration_list
1486 ;
1487
1488declaration_list:
1489 declaration
1490 | declaration_list declaration
1491 { $$ = $1->appendList( $2 ); }
1492 ;
1493
1494KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1495 // empty
1496 { $$ = nullptr; }
1497 | KR_parameter_list
1498 ;
1499
1500KR_parameter_list:
1501 push c_declaration pop ';'
1502 { $$ = $2; }
1503 | KR_parameter_list push c_declaration pop ';'
1504 { $$ = $1->appendList( $3 ); }
1505 ;
1506
1507local_label_declaration_opt: // GCC, local label
1508 // empty
1509 | local_label_declaration_list
1510 ;
1511
1512local_label_declaration_list: // GCC, local label
1513 LABEL local_label_list ';'
1514 | local_label_declaration_list LABEL local_label_list ';'
1515 ;
1516
1517local_label_list: // GCC, local label
1518 identifier_or_type_name
1519 | local_label_list ',' identifier_or_type_name
1520 ;
1521
1522declaration: // old & new style declarations
1523 c_declaration ';'
1524 | cfa_declaration ';' // CFA
1525 | static_assert // C11
1526 ;
1527
1528static_assert:
1529 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1530 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
1531 | STATICASSERT '(' constant_expression ')' ';' // CFA
1532 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( *new string( "\"\"" ) ) ); }
1533
1534// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1535// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1536// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1537// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1538// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1539// block, but cannot be mixed within a specific declaration.
1540//
1541// CFA C
1542// [10] int x; int x[10]; // array of 10 integers
1543// [10] * char y; char *y[10]; // array of 10 pointers to char
1544
1545cfa_declaration: // CFA
1546 cfa_variable_declaration
1547 | cfa_typedef_declaration
1548 | cfa_function_declaration
1549 | type_declaring_list
1550 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1551 | trait_specifier
1552 ;
1553
1554cfa_variable_declaration: // CFA
1555 cfa_variable_specifier initializer_opt
1556 { $$ = $1->addInitializer( $2 ); }
1557 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1558 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1559 // them as a type_qualifier cannot appear in that context.
1560 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
1561 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1562 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
1563 ;
1564
1565cfa_variable_specifier: // CFA
1566 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1567 // storage-class
1568 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1569 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1570 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1571 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1572 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1573 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
1574 ;
1575
1576cfa_function_declaration: // CFA
1577 cfa_function_specifier
1578 | type_qualifier_list cfa_function_specifier
1579 { $$ = $2->addQualifiers( $1 ); }
1580 | declaration_qualifier_list cfa_function_specifier
1581 { $$ = $2->addQualifiers( $1 ); }
1582 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1583 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
1584 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
1585 {
1586 // Append the return type at the start (left-hand-side) to each identifier in the list.
1587 DeclarationNode * ret = new DeclarationNode;
1588 ret->type = maybeClone( $1->type->base );
1589 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
1590 }
1591 ;
1592
1593cfa_function_specifier: // CFA
1594// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
1595// {
1596// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1597// }
1598// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
1599// {
1600// typedefTable.setNextIdentifier( *$5 );
1601// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1602// }
1603// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
1604// {
1605// typedefTable.setNextIdentifier( *$5 );
1606// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1607// }
1608// | '[' ']' typegen_name
1609 // identifier_or_type_name must be broken apart because of the sequence:
1610 //
1611 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
1612 // '[' ']' type_specifier
1613 //
1614 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1615 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1616 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1617 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1618 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1619 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1620 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1621 ;
1622
1623cfa_function_return: // CFA
1624 '[' push cfa_parameter_list pop ']'
1625 { $$ = DeclarationNode::newTuple( $3 ); }
1626 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1627 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
1628 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1629 ;
1630
1631cfa_typedef_declaration: // CFA
1632 TYPEDEF cfa_variable_specifier
1633 {
1634 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "1" );
1635 $$ = $2->addTypedef();
1636 }
1637 | TYPEDEF cfa_function_specifier
1638 {
1639 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "2" );
1640 $$ = $2->addTypedef();
1641 }
1642 | cfa_typedef_declaration pop ',' push identifier
1643 {
1644 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "3" );
1645 $$ = $1->appendList( $1->cloneType( $5 ) );
1646 }
1647 ;
1648
1649// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1650// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1651
1652typedef_declaration:
1653 TYPEDEF type_specifier declarator
1654 {
1655 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "4" );
1656 $$ = $3->addType( $2 )->addTypedef();
1657 }
1658 | typedef_declaration pop ',' push declarator
1659 {
1660 typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname, "5" );
1661 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1662 }
1663 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1664 {
1665 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "6" );
1666 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1667 }
1668 | type_specifier TYPEDEF declarator
1669 {
1670 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "7" );
1671 $$ = $3->addType( $1 )->addTypedef();
1672 }
1673 | type_specifier TYPEDEF type_qualifier_list declarator
1674 {
1675 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "8" );
1676 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1677 }
1678 ;
1679
1680typedef_expression:
1681 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1682 TYPEDEF identifier '=' assignment_expression
1683 {
1684 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1685 }
1686 | typedef_expression pop ',' push identifier '=' assignment_expression
1687 {
1688 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1689 }
1690 ;
1691
1692c_declaration:
1693 declaration_specifier declaring_list
1694 { $$ = distAttr( $1, $2 ); }
1695 | typedef_declaration
1696 | typedef_expression // deprecated GCC, naming expression type
1697 | sue_declaration_specifier
1698 ;
1699
1700declaring_list:
1701 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1702 // storage-class
1703 declarator asm_name_opt initializer_opt
1704 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
1705 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1706 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
1707 ;
1708
1709declaration_specifier: // type specifier + storage class
1710 basic_declaration_specifier
1711 | sue_declaration_specifier
1712 | type_declaration_specifier
1713 ;
1714
1715declaration_specifier_nobody: // type specifier + storage class - {...}
1716 // Preclude SUE declarations in restricted scopes:
1717 //
1718 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1719 //
1720 // because it is impossible to call f due to name equivalence.
1721 basic_declaration_specifier
1722 | sue_declaration_specifier_nobody
1723 | type_declaration_specifier
1724 ;
1725
1726type_specifier: // type specifier
1727 basic_type_specifier
1728 | sue_type_specifier
1729 | type_type_specifier
1730 ;
1731
1732type_specifier_nobody: // type specifier - {...}
1733 // Preclude SUE declarations in restricted scopes:
1734 //
1735 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1736 //
1737 // because it is impossible to call f due to name equivalence.
1738 basic_type_specifier
1739 | sue_type_specifier_nobody
1740 | type_type_specifier
1741 ;
1742
1743enum_specifier_nobody: // type specifier - {...}
1744 // Preclude SUE declarations in restricted scopes (see type_specifier_nobody)
1745 basic_type_specifier
1746 | sue_type_specifier_nobody
1747 ;
1748
1749type_qualifier_list_opt: // GCC, used in asm_statement
1750 // empty
1751 { $$ = nullptr; }
1752 | type_qualifier_list
1753 ;
1754
1755type_qualifier_list:
1756 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1757 //
1758 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1759 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1760 // appeared only once.
1761 type_qualifier
1762 | type_qualifier_list type_qualifier
1763 { $$ = $1->addQualifiers( $2 ); }
1764 ;
1765
1766type_qualifier:
1767 type_qualifier_name
1768 | attribute
1769 ;
1770
1771type_qualifier_name:
1772 CONST
1773 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1774 | RESTRICT
1775 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1776 | VOLATILE
1777 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1778 | ATOMIC
1779 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1780 | forall
1781 ;
1782
1783forall:
1784 FORALL '(' type_parameter_list ')' // CFA
1785 { $$ = DeclarationNode::newForall( $3 ); }
1786 ;
1787
1788declaration_qualifier_list:
1789 storage_class_list
1790 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1791 { $$ = $1->addQualifiers( $2 ); }
1792 | declaration_qualifier_list type_qualifier_list storage_class_list
1793 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1794 ;
1795
1796storage_class_list:
1797 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1798 // only one of each is specified, except for inline, which can appear with the others.
1799 //
1800 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1801 // specifiers in a declaration.
1802 storage_class
1803 | storage_class_list storage_class
1804 { $$ = $1->addQualifiers( $2 ); }
1805 ;
1806
1807storage_class:
1808 EXTERN
1809 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1810 | STATIC
1811 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
1812 | AUTO
1813 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1814 | REGISTER
1815 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
1816 | THREADLOCAL // C11
1817 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1818 // Put function specifiers here to simplify parsing rules, but separate them semantically.
1819 | INLINE // C99
1820 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1821 | FORTRAN // C99
1822 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1823 | NORETURN // C11
1824 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1825 ;
1826
1827basic_type_name:
1828 VOID
1829 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1830 | BOOL // C99
1831 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1832 | CHAR
1833 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1834 | INT
1835 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1836 | INT128
1837 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1838 | UINT128
1839 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ); }
1840 | FLOAT
1841 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1842 | DOUBLE
1843 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1844 | uuFLOAT80
1845 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat80 ); }
1846 | uuFLOAT128
1847 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat128 ); }
1848 | uFLOAT16
1849 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat16 ); }
1850 | uFLOAT32
1851 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32 ); }
1852 | uFLOAT32X
1853 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32x ); }
1854 | uFLOAT64
1855 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64 ); }
1856 | uFLOAT64X
1857 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64x ); }
1858 | uFLOAT128
1859 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
1860 | COMPLEX // C99
1861 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1862 | IMAGINARY // C99
1863 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1864 | SIGNED
1865 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1866 | UNSIGNED
1867 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1868 | SHORT
1869 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1870 | LONG
1871 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1872 | VALIST // GCC, __builtin_va_list
1873 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1874 | AUTO_TYPE
1875 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::AutoType ); }
1876 ;
1877
1878basic_declaration_specifier:
1879 // A semantic check is necessary for conflicting storage classes.
1880 basic_type_specifier
1881 | declaration_qualifier_list basic_type_specifier
1882 { $$ = $2->addQualifiers( $1 ); }
1883 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1884 { $$ = $1->addQualifiers( $2 ); }
1885 | basic_declaration_specifier storage_class type_qualifier_list
1886 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1887 | basic_declaration_specifier storage_class basic_type_specifier
1888 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1889 ;
1890
1891basic_type_specifier:
1892 direct_type
1893 // Cannot have type modifiers, e.g., short, long, etc.
1894 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
1895 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1896 ;
1897
1898direct_type:
1899 basic_type_name
1900 | type_qualifier_list basic_type_name
1901 { $$ = $2->addQualifiers( $1 ); }
1902 | direct_type type_qualifier
1903 { $$ = $1->addQualifiers( $2 ); }
1904 | direct_type basic_type_name
1905 { $$ = $1->addType( $2 ); }
1906 ;
1907
1908indirect_type:
1909 TYPEOF '(' type ')' // GCC: typeof( x ) y;
1910 { $$ = $3; }
1911 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
1912 { $$ = DeclarationNode::newTypeof( $3 ); }
1913 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
1914 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ), true ); }
1915 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
1916 { $$ = DeclarationNode::newTypeof( $3, true ); }
1917 | ZERO_T // CFA
1918 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1919 | ONE_T // CFA
1920 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1921 ;
1922
1923sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1924 sue_type_specifier
1925 | declaration_qualifier_list sue_type_specifier
1926 { $$ = $2->addQualifiers( $1 ); }
1927 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1928 { $$ = $1->addQualifiers( $2 ); }
1929 | sue_declaration_specifier storage_class type_qualifier_list
1930 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1931 ;
1932
1933sue_type_specifier: // struct, union, enum + type specifier
1934 elaborated_type
1935 | type_qualifier_list
1936 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1937 elaborated_type
1938 { $$ = $3->addQualifiers( $1 ); }
1939 | sue_type_specifier type_qualifier
1940 {
1941 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
1942 $$ = $1->addQualifiers( $2 );
1943 }
1944 ;
1945
1946sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1947 sue_type_specifier_nobody
1948 | declaration_qualifier_list sue_type_specifier_nobody
1949 { $$ = $2->addQualifiers( $1 ); }
1950 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1951 { $$ = $1->addQualifiers( $2 ); }
1952 | sue_declaration_specifier_nobody storage_class type_qualifier_list
1953 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1954 ;
1955
1956sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1957 elaborated_type_nobody
1958 | type_qualifier_list elaborated_type_nobody
1959 { $$ = $2->addQualifiers( $1 ); }
1960 | sue_type_specifier_nobody type_qualifier
1961 { $$ = $1->addQualifiers( $2 ); }
1962 ;
1963
1964type_declaration_specifier:
1965 type_type_specifier
1966 | declaration_qualifier_list type_type_specifier
1967 { $$ = $2->addQualifiers( $1 ); }
1968 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1969 { $$ = $1->addQualifiers( $2 ); }
1970 | type_declaration_specifier storage_class type_qualifier_list
1971 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1972 ;
1973
1974type_type_specifier: // typedef types
1975 type_name
1976 | type_qualifier_list type_name
1977 { $$ = $2->addQualifiers( $1 ); }
1978 | type_type_specifier type_qualifier
1979 { $$ = $1->addQualifiers( $2 ); }
1980 ;
1981
1982type_name:
1983 TYPEDEFname
1984 { $$ = DeclarationNode::newFromTypedef( $1 ); }
1985 | '.' TYPEDEFname
1986 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), DeclarationNode::newFromTypedef( $2 ) ); }
1987 | type_name '.' TYPEDEFname
1988 { $$ = DeclarationNode::newQualifiedType( $1, DeclarationNode::newFromTypedef( $3 ) ); }
1989 | typegen_name
1990 | '.' typegen_name
1991 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), $2 ); }
1992 | type_name '.' typegen_name
1993 { $$ = DeclarationNode::newQualifiedType( $1, $3 ); }
1994 ;
1995
1996typegen_name: // CFA
1997 TYPEGENname
1998 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1999 | TYPEGENname '(' ')'
2000 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2001 | TYPEGENname '(' type_list ')'
2002 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
2003 ;
2004
2005elaborated_type: // struct, union, enum
2006 aggregate_type
2007 | enum_type
2008 ;
2009
2010elaborated_type_nobody: // struct, union, enum - {...}
2011 aggregate_type_nobody
2012 | enum_type_nobody
2013 ;
2014
2015aggregate_type: // struct, union
2016 aggregate_key attribute_list_opt
2017 { forall = false; } // reset
2018 '{' field_declaration_list_opt '}' type_parameters_opt
2019 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2020 | aggregate_key attribute_list_opt identifier
2021 {
2022 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2023 forall = false; // reset
2024 }
2025 '{' field_declaration_list_opt '}' type_parameters_opt
2026 { $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 ); }
2027 | aggregate_key attribute_list_opt type_name
2028 {
2029 // for type_name can be a qualified type name S.T, in which case only the last name in the chain needs a typedef (other names in the chain should already have one)
2030 typedefTable.makeTypedef( *$3->type->leafName(), forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2031 forall = false; // reset
2032 }
2033 '{' field_declaration_list_opt '}' type_parameters_opt
2034 { $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $8, $6, true )->addQualifiers( $2 ); }
2035 | aggregate_type_nobody
2036 ;
2037
2038type_parameters_opt:
2039 // empty
2040 { $$ = nullptr; } %prec '}'
2041 | '(' type_list ')'
2042 { $$ = $2; }
2043 ;
2044
2045aggregate_type_nobody: // struct, union - {...}
2046 aggregate_key attribute_list_opt identifier
2047 {
2048 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname );
2049 forall = false; // reset
2050 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2051 }
2052 | aggregate_key attribute_list_opt type_name
2053 {
2054 forall = false; // reset
2055 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2056 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2057 // delete newFromTypeGen.
2058 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2059 $3->type->symbolic.name = nullptr;
2060 $3->type->symbolic.actuals = nullptr;
2061 delete $3;
2062 }
2063 ;
2064
2065aggregate_key:
2066 aggregate_data
2067 | aggregate_control
2068 ;
2069
2070aggregate_data:
2071 STRUCT
2072 { yyy = true; $$ = AggregateDecl::Struct; }
2073 | UNION
2074 { yyy = true; $$ = AggregateDecl::Union; }
2075 | EXCEPTION // CFA
2076 // { yyy = true; $$ = AggregateDecl::Exception; }
2077 { SemanticError( yylloc, "exception aggregate is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2078 ;
2079
2080aggregate_control: // CFA
2081 MONITOR
2082 { yyy = true; $$ = AggregateDecl::Monitor; }
2083 | MUTEX STRUCT
2084 { yyy = true; $$ = AggregateDecl::Monitor; }
2085 | GENERATOR
2086 { yyy = true; $$ = AggregateDecl::Generator; }
2087 | MUTEX GENERATOR
2088 { SemanticError( yylloc, "monitor generator is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2089 | COROUTINE
2090 { yyy = true; $$ = AggregateDecl::Coroutine; }
2091 | MUTEX COROUTINE
2092 { SemanticError( yylloc, "monitor coroutine is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2093 | THREAD
2094 { yyy = true; $$ = AggregateDecl::Thread; }
2095 | MUTEX THREAD
2096 { SemanticError( yylloc, "monitor thread is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2097 ;
2098
2099field_declaration_list_opt:
2100 // empty
2101 { $$ = nullptr; }
2102 | field_declaration_list_opt field_declaration
2103 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2104 ;
2105
2106field_declaration:
2107 type_specifier field_declaring_list_opt ';'
2108 { $$ = fieldDecl( $1, $2 ); }
2109 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2110 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2111 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2112 {
2113 if ( ! $3 ) { // field declarator ?
2114 $3 = DeclarationNode::newName( nullptr );
2115 } // if
2116 $3->inLine = true;
2117 $$ = distAttr( $2, $3 ); // mark all fields in list
2118 distInl( $3 );
2119 }
2120 | INLINE aggregate_control ';' // CFA
2121 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2122 | typedef_declaration ';' // CFA
2123 | cfa_field_declaring_list ';' // CFA, new style field declaration
2124 | EXTENSION cfa_field_declaring_list ';' // GCC
2125 { distExt( $2 ); $$ = $2; } // mark all fields in list
2126 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2127 { $$ = $2; } // mark all fields in list
2128 | cfa_typedef_declaration ';' // CFA
2129 | static_assert // C11
2130 ;
2131
2132field_declaring_list_opt:
2133 // empty
2134 { $$ = nullptr; }
2135 | field_declarator
2136 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2137 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2138 ;
2139
2140field_declarator:
2141 bit_subrange_size // C special case, no field name
2142 { $$ = DeclarationNode::newBitfield( $1 ); }
2143 | variable_declarator bit_subrange_size_opt
2144 // A semantic check is required to ensure bit_subrange only appears on integral types.
2145 { $$ = $1->addBitfield( $2 ); }
2146 | variable_type_redeclarator bit_subrange_size_opt
2147 // A semantic check is required to ensure bit_subrange only appears on integral types.
2148 { $$ = $1->addBitfield( $2 ); }
2149 ;
2150
2151field_abstract_list_opt:
2152 // empty
2153 { $$ = nullptr; }
2154 | field_abstract
2155 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2156 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2157 ;
2158
2159field_abstract:
2160 // no bit fields
2161 variable_abstract_declarator
2162 ;
2163
2164cfa_field_declaring_list: // CFA, new style field declaration
2165 // bit-fields are handled by C declarations
2166 cfa_abstract_declarator_tuple identifier_or_type_name
2167 { $$ = $1->addName( $2 ); }
2168 | cfa_field_declaring_list ',' identifier_or_type_name
2169 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
2170 ;
2171
2172cfa_field_abstract_list: // CFA, new style field declaration
2173 // bit-fields are handled by C declarations
2174 cfa_abstract_declarator_tuple
2175 | cfa_field_abstract_list ','
2176 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
2177 ;
2178
2179bit_subrange_size_opt:
2180 // empty
2181 { $$ = nullptr; }
2182 | bit_subrange_size
2183 ;
2184
2185bit_subrange_size:
2186 ':' assignment_expression
2187 { $$ = $2; }
2188 ;
2189
2190// Cannot use attribute_list_opt because of ambiguity with enum_specifier_nobody, which already parses attribute.
2191// Hence, only a single attribute is allowed after the "ENUM".
2192enum_type: // enum
2193 ENUM attribute_opt '{' enumerator_list comma_opt '}'
2194 { $$ = DeclarationNode::newEnum( nullptr, $4, true )->addQualifiers( $2 ); }
2195 | ENUM attribute_opt identifier
2196 { typedefTable.makeTypedef( *$3 ); }
2197 '{' enumerator_list comma_opt '}'
2198 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
2199 | ENUM attribute_opt typedef // enum cannot be generic
2200 '{' enumerator_list comma_opt '}'
2201 { $$ = DeclarationNode::newEnum( $3->name, $5, true )->addQualifiers( $2 ); }
2202 | ENUM enum_specifier_nobody '{' enumerator_list comma_opt '}'
2203 // { $$ = DeclarationNode::newEnum( nullptr, $4, true ); }
2204 { SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr; }
2205 | ENUM enum_specifier_nobody declarator '{' enumerator_list comma_opt '}'
2206 // {
2207 // typedefTable.makeTypedef( *$3->name );
2208 // $$ = DeclarationNode::newEnum( nullptr, $5, true );
2209 // }
2210 { SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr; }
2211 | enum_type_nobody
2212 ;
2213
2214enum_type_nobody: // enum - {...}
2215 ENUM attribute_opt identifier
2216 {
2217 typedefTable.makeTypedef( *$3 );
2218 $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
2219 }
2220 | ENUM attribute_opt type_name // enum cannot be generic
2221 {
2222 typedefTable.makeTypedef( *$3->type->symbolic.name );
2223 $$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false )->addQualifiers( $2 );
2224 }
2225 ;
2226
2227enumerator_list:
2228 identifier_or_type_name enumerator_value_opt
2229 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
2230 | enumerator_list ',' identifier_or_type_name enumerator_value_opt
2231 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
2232 ;
2233
2234enumerator_value_opt:
2235 // empty
2236 { $$ = nullptr; }
2237 // | '=' constant_expression
2238 // { $$ = $2; }
2239 | '=' initializer
2240 { $$ = $2->get_expression(); } // FIX ME: enum only deals with constant_expression
2241 ;
2242
2243cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
2244 // empty
2245 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2246 | ELLIPSIS
2247 { $$ = nullptr; }
2248 | cfa_abstract_parameter_list
2249 | cfa_parameter_list
2250 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2251 { $$ = $1->appendList( $5 ); }
2252 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2253 { $$ = $1->addVarArgs(); }
2254 | cfa_parameter_list pop ',' push ELLIPSIS
2255 { $$ = $1->addVarArgs(); }
2256 ;
2257
2258cfa_parameter_list: // CFA
2259 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2260 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2261 cfa_parameter_declaration
2262 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2263 { $$ = $1->appendList( $5 ); }
2264 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2265 { $$ = $1->appendList( $5 ); }
2266 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2267 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2268 ;
2269
2270cfa_abstract_parameter_list: // CFA, new & old style abstract
2271 cfa_abstract_parameter_declaration
2272 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2273 { $$ = $1->appendList( $5 ); }
2274 ;
2275
2276parameter_type_list_opt:
2277 // empty
2278 { $$ = nullptr; }
2279 | ELLIPSIS
2280 { $$ = nullptr; }
2281 | parameter_list
2282 | parameter_list pop ',' push ELLIPSIS
2283 { $$ = $1->addVarArgs(); }
2284 ;
2285
2286parameter_list: // abstract + real
2287 abstract_parameter_declaration
2288 | parameter_declaration
2289 | parameter_list pop ',' push abstract_parameter_declaration
2290 { $$ = $1->appendList( $5 ); }
2291 | parameter_list pop ',' push parameter_declaration
2292 { $$ = $1->appendList( $5 ); }
2293 ;
2294
2295// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2296// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2297
2298cfa_parameter_declaration: // CFA, new & old style parameter declaration
2299 parameter_declaration
2300 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2301 { $$ = $1->addName( $2 ); }
2302 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2303 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2304 { $$ = $1->addName( $2 ); }
2305 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2306 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2307 | cfa_function_specifier
2308 ;
2309
2310cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2311 abstract_parameter_declaration
2312 | cfa_identifier_parameter_declarator_no_tuple
2313 | cfa_abstract_tuple
2314 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2315 | type_qualifier_list cfa_abstract_tuple
2316 { $$ = $2->addQualifiers( $1 ); }
2317 | cfa_abstract_function
2318 ;
2319
2320parameter_declaration:
2321 // No SUE declaration in parameter list.
2322 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2323 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2324 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2325 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2326 ;
2327
2328abstract_parameter_declaration:
2329 declaration_specifier_nobody default_initializer_opt
2330 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2331 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2332 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2333 ;
2334
2335// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2336// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2337// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2338
2339identifier_list: // K&R-style parameter list => no types
2340 identifier
2341 { $$ = DeclarationNode::newName( $1 ); }
2342 | identifier_list ',' identifier
2343 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2344 ;
2345
2346identifier_or_type_name:
2347 identifier
2348 | TYPEDEFname
2349 | TYPEGENname
2350 ;
2351
2352type_no_function: // sizeof, alignof, cast (constructor)
2353 cfa_abstract_declarator_tuple // CFA
2354 | type_specifier
2355 | type_specifier abstract_declarator
2356 { $$ = $2->addType( $1 ); }
2357 ;
2358
2359type: // typeof, assertion
2360 type_no_function
2361 | cfa_abstract_function // CFA
2362 ;
2363
2364initializer_opt:
2365 // empty
2366 { $$ = nullptr; }
2367 | '=' initializer
2368 { $$ = $2; }
2369 | '=' VOID
2370 { $$ = new InitializerNode( true ); }
2371 | ATassign initializer
2372 { $$ = $2->set_maybeConstructed( false ); }
2373 ;
2374
2375initializer:
2376 assignment_expression { $$ = new InitializerNode( $1 ); }
2377 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2378 ;
2379
2380initializer_list_opt:
2381 // empty
2382 { $$ = nullptr; }
2383 | initializer
2384 | designation initializer { $$ = $2->set_designators( $1 ); }
2385 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2386 | initializer_list_opt ',' designation initializer
2387 { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2388 ;
2389
2390// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2391// '=' to separator the designator from the initializer value, as in:
2392//
2393// int x[10] = { [1] = 3 };
2394//
2395// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2396// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2397// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2398// shift/reduce conflicts
2399
2400designation:
2401 designator_list ':' // C99, CFA uses ":" instead of "="
2402 | identifier ':' // GCC, field name
2403 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2404 ;
2405
2406designator_list: // C99
2407 designator
2408 | designator_list designator
2409 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
2410 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2411 ;
2412
2413designator:
2414 '.' identifier // C99, field name
2415 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2416 | '[' push assignment_expression pop ']' // C99, single array element
2417 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2418 { $$ = $3; }
2419 | '[' push subrange pop ']' // CFA, multiple array elements
2420 { $$ = $3; }
2421 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2422 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $3 ), maybeMoveBuild<Expression>( $5 ) ) ); }
2423 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
2424 { $$ = $4; }
2425 ;
2426
2427// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2428// rather than an object-oriented type system. This required four groups of extensions:
2429//
2430// Overloading: function, data, and operator identifiers may be overloaded.
2431//
2432// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2433// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2434// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2435//
2436// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2437// site. A polymorphic function is not a template; it is a function, with an address and a type.
2438//
2439// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2440// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2441// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2442// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2443// on type arguments of polymorphic functions.
2444
2445type_parameter_list: // CFA
2446 type_parameter
2447 | type_parameter_list ',' type_parameter
2448 { $$ = $1->appendList( $3 ); }
2449 ;
2450
2451type_initializer_opt: // CFA
2452 // empty
2453 { $$ = nullptr; }
2454 | '=' type
2455 { $$ = $2; }
2456 ;
2457
2458type_parameter: // CFA
2459 type_class identifier_or_type_name
2460 {
2461 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2462 if ( $1 == TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
2463 if ( $1 == TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
2464 if ( $1 == TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
2465 }
2466 type_initializer_opt assertion_list_opt
2467 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2468 | identifier_or_type_name new_type_class
2469 { typedefTable.addToScope( *$1, TYPEDEFname, "9" ); }
2470 type_initializer_opt assertion_list_opt
2471 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2472 | '[' identifier_or_type_name ']'
2473 {
2474 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2475 $$ = DeclarationNode::newTypeParam( TypeDecl::ALtype, $2 );
2476 }
2477 // | type_specifier identifier_parameter_declarator
2478 | assertion_list
2479 { $$ = DeclarationNode::newTypeParam( TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
2480 ;
2481
2482new_type_class: // CFA
2483 // empty
2484 { $$ = TypeDecl::Otype; }
2485 | '&'
2486 { $$ = TypeDecl::Dtype; }
2487 | '*'
2488 { $$ = TypeDecl::DStype; } // dtype + sized
2489 | ELLIPSIS
2490 { $$ = TypeDecl::Ttype; }
2491 ;
2492
2493type_class: // CFA
2494 OTYPE
2495 { $$ = TypeDecl::Otype; }
2496 | DTYPE
2497 { $$ = TypeDecl::Dtype; }
2498 | FTYPE
2499 { $$ = TypeDecl::Ftype; }
2500 | TTYPE
2501 { $$ = TypeDecl::Ttype; }
2502 ;
2503
2504assertion_list_opt: // CFA
2505 // empty
2506 { $$ = nullptr; }
2507 | assertion_list
2508 ;
2509
2510assertion_list: // CFA
2511 assertion
2512 | assertion_list assertion
2513 { $$ = $1->appendList( $2 ); }
2514 ;
2515
2516assertion: // CFA
2517 '|' identifier_or_type_name '(' type_list ')'
2518 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
2519 | '|' '{' push trait_declaration_list pop '}'
2520 { $$ = $4; }
2521 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
2522 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
2523 ;
2524
2525type_list: // CFA
2526 type
2527 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2528 | assignment_expression
2529 { SemanticError( yylloc, toString("Expression generic parameters are currently unimplemented: ", $1->build()) ); $$ = nullptr; }
2530 | type_list ',' type
2531 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) )); }
2532 | type_list ',' assignment_expression
2533 { SemanticError( yylloc, toString("Expression generic parameters are currently unimplemented: ", $3->build()) ); $$ = nullptr; }
2534 // { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2535 ;
2536
2537type_declaring_list: // CFA
2538 OTYPE type_declarator
2539 { $$ = $2; }
2540 | storage_class_list OTYPE type_declarator
2541 { $$ = $3->addQualifiers( $1 ); }
2542 | type_declaring_list ',' type_declarator
2543 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2544 ;
2545
2546type_declarator: // CFA
2547 type_declarator_name assertion_list_opt
2548 { $$ = $1->addAssertions( $2 ); }
2549 | type_declarator_name assertion_list_opt '=' type
2550 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2551 ;
2552
2553type_declarator_name: // CFA
2554 identifier_or_type_name
2555 {
2556 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
2557 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2558 }
2559 | identifier_or_type_name '(' type_parameter_list ')'
2560 {
2561 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "11" );
2562 $$ = DeclarationNode::newTypeDecl( $1, $3 );
2563 }
2564 ;
2565
2566trait_specifier: // CFA
2567 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
2568 { $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
2569 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
2570 { $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
2571 ;
2572
2573trait_declaration_list: // CFA
2574 trait_declaration
2575 | trait_declaration_list pop push trait_declaration
2576 { $$ = $1->appendList( $4 ); }
2577 ;
2578
2579trait_declaration: // CFA
2580 cfa_trait_declaring_list ';'
2581 | trait_declaring_list ';'
2582 ;
2583
2584cfa_trait_declaring_list: // CFA
2585 cfa_variable_specifier
2586 | cfa_function_specifier
2587 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2588 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
2589 ;
2590
2591trait_declaring_list: // CFA
2592 type_specifier declarator
2593 { $$ = $2->addType( $1 ); }
2594 | trait_declaring_list pop ',' push declarator
2595 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
2596 ;
2597
2598//***************************** EXTERNAL DEFINITIONS *****************************
2599
2600translation_unit:
2601 // empty, input file
2602 | external_definition_list
2603 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2604 ;
2605
2606external_definition_list:
2607 push external_definition pop
2608 { $$ = $2; }
2609 | external_definition_list push external_definition pop
2610 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2611 ;
2612
2613external_definition_list_opt:
2614 // empty
2615 { $$ = nullptr; }
2616 | external_definition_list
2617 ;
2618
2619up:
2620 { typedefTable.up( forall ); forall = false; }
2621 ;
2622
2623down:
2624 { typedefTable.down(); }
2625 ;
2626
2627external_definition:
2628 declaration
2629 | external_function_definition
2630 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2631 {
2632 distExt( $2 ); // mark all fields in list
2633 $$ = $2;
2634 }
2635 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2636 {
2637 $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) );
2638 }
2639 | EXTERN STRINGliteral // C++-style linkage specifier
2640 {
2641 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2642 linkage = LinkageSpec::update( yylloc, linkage, $2 );
2643 }
2644 '{' up external_definition_list_opt down '}'
2645 {
2646 linkage = linkageStack.top();
2647 linkageStack.pop();
2648 $$ = $6;
2649 }
2650 | type_qualifier_list
2651 {
2652 if ( $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2653 if ( $1->type->forall ) forall = true; // remember generic type
2654 }
2655 '{' up external_definition_list_opt down '}' // CFA, namespace
2656 {
2657 distQual( $5, $1 );
2658 forall = false;
2659 $$ = $5;
2660 }
2661 | declaration_qualifier_list
2662 {
2663 if ( $1->type && $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2664 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
2665 }
2666 '{' up external_definition_list_opt down '}' // CFA, namespace
2667 {
2668 distQual( $5, $1 );
2669 forall = false;
2670 $$ = $5;
2671 }
2672 | declaration_qualifier_list type_qualifier_list
2673 {
2674 if ( ($1->type && $1->type->qualifiers.val) || $2->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2675 if ( ($1->type && $1->type->forall) || $2->type->forall ) forall = true; // remember generic type
2676 }
2677 '{' up external_definition_list_opt down '}' // CFA, namespace
2678 {
2679 distQual( $6, $1->addQualifiers( $2 ) );
2680 forall = false;
2681 $$ = $6;
2682 }
2683 ;
2684
2685external_function_definition:
2686 function_definition
2687 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2688 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2689 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2690 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2691 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2692 | function_declarator compound_statement
2693 { $$ = $1->addFunctionBody( $2 ); }
2694 | KR_function_declarator KR_parameter_list_opt compound_statement
2695 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
2696 ;
2697
2698with_clause_opt:
2699 // empty
2700 { $$ = nullptr; forall = false; }
2701 | WITH '(' tuple_expression_list ')'
2702 { $$ = $3; forall = false; }
2703 ;
2704
2705function_definition:
2706 cfa_function_declaration with_clause_opt compound_statement // CFA
2707 {
2708 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2709 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
2710 $1->get_last()->addFunctionBody( $3, $2 );
2711 $$ = $1;
2712 }
2713 | declaration_specifier function_declarator with_clause_opt compound_statement
2714 {
2715 rebindForall( $1, $2 );
2716 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2717 }
2718 | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement
2719 {
2720 rebindForall( $1, $2 );
2721 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2722 }
2723 // handles default int return type, OBSOLESCENT (see 1)
2724 | type_qualifier_list function_declarator with_clause_opt compound_statement
2725 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2726 // handles default int return type, OBSOLESCENT (see 1)
2727 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
2728 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2729 // handles default int return type, OBSOLESCENT (see 1)
2730 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2731 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2732
2733 // Old-style K&R function definition, OBSOLESCENT (see 4)
2734 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2735 {
2736 rebindForall( $1, $2 );
2737 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
2738 }
2739 // handles default int return type, OBSOLESCENT (see 1)
2740 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2741 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2742 // handles default int return type, OBSOLESCENT (see 1)
2743 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2744 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2745 // handles default int return type, OBSOLESCENT (see 1)
2746 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2747 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2748 ;
2749
2750declarator:
2751 variable_declarator
2752 | variable_type_redeclarator
2753 | function_declarator
2754 ;
2755
2756subrange:
2757 constant_expression '~' constant_expression // CFA, integer subrange
2758 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
2759 ;
2760
2761asm_name_opt: // GCC
2762 // empty
2763 { $$ = nullptr; }
2764 | ASM '(' string_literal ')' attribute_list_opt
2765 {
2766 DeclarationNode * name = new DeclarationNode();
2767 name->asmName = $3;
2768 $$ = name->addQualifiers( $5 );
2769 }
2770 ;
2771
2772attribute_list_opt: // GCC
2773 // empty
2774 { $$ = nullptr; }
2775 | attribute_list
2776 ;
2777
2778attribute_list: // GCC
2779 attribute
2780 | attribute_list attribute
2781 { $$ = $2->addQualifiers( $1 ); }
2782 ;
2783
2784attribute_opt:
2785 // empty
2786 { $$ = nullptr; }
2787 | attribute
2788 ;
2789
2790attribute: // GCC
2791 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2792 { $$ = $4; }
2793 ;
2794
2795attribute_name_list: // GCC
2796 attribute_name
2797 | attribute_name_list ',' attribute_name
2798 { $$ = $3->addQualifiers( $1 ); }
2799 ;
2800
2801attribute_name: // GCC
2802 // empty
2803 { $$ = nullptr; }
2804 | attr_name
2805 { $$ = DeclarationNode::newAttribute( $1 ); }
2806 | attr_name '(' argument_expression_list_opt ')'
2807 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
2808 ;
2809
2810attr_name: // GCC
2811 IDENTIFIER
2812 | quasi_keyword
2813 | TYPEDEFname
2814 | TYPEGENname
2815 | FALLTHROUGH
2816 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
2817 | CONST
2818 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2819 ;
2820
2821// ============================================================================
2822// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2823// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2824// in:
2825//
2826// int (*f())[10] { ... };
2827// ... (*f())[3] += 1; // definition mimics usage
2828//
2829// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2830// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2831// ============================================================================
2832
2833// ----------------------------------------------------------------------------
2834// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2835// to define a variable or function prototype, e.g.:
2836//
2837// valid declaration invalid definition
2838// ----------------- ------------------
2839// int f; int f {}
2840// int *f; int *f {}
2841// int f[10]; int f[10] {}
2842// int (*f)(int); int (*f)(int) {}
2843//
2844// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2845// variable_declarator and function_declarator.
2846// ----------------------------------------------------------------------------
2847
2848// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2849// declaring an array of functions versus a pointer to an array of functions.
2850
2851variable_declarator:
2852 paren_identifier attribute_list_opt
2853 { $$ = $1->addQualifiers( $2 ); }
2854 | variable_ptr
2855 | variable_array attribute_list_opt
2856 { $$ = $1->addQualifiers( $2 ); }
2857 | variable_function attribute_list_opt
2858 { $$ = $1->addQualifiers( $2 ); }
2859 ;
2860
2861paren_identifier:
2862 identifier
2863 { $$ = DeclarationNode::newName( $1 ); }
2864 | '(' paren_identifier ')' // redundant parenthesis
2865 { $$ = $2; }
2866 ;
2867
2868variable_ptr:
2869 ptrref_operator variable_declarator
2870 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2871 | ptrref_operator type_qualifier_list variable_declarator
2872 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2873 | '(' variable_ptr ')' attribute_list_opt
2874 { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2875 ;
2876
2877variable_array:
2878 paren_identifier array_dimension
2879 { $$ = $1->addArray( $2 ); }
2880 | '(' variable_ptr ')' array_dimension
2881 { $$ = $2->addArray( $4 ); }
2882 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2883 { $$ = $2->addArray( $4 ); }
2884 | '(' variable_array ')' // redundant parenthesis
2885 { $$ = $2; }
2886 ;
2887
2888variable_function:
2889 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2890 { $$ = $2->addParamList( $6 ); }
2891 | '(' variable_function ')' // redundant parenthesis
2892 { $$ = $2; }
2893 ;
2894
2895// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2896// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2897// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2898
2899function_declarator:
2900 function_no_ptr attribute_list_opt
2901 { $$ = $1->addQualifiers( $2 ); }
2902 | function_ptr
2903 | function_array attribute_list_opt
2904 { $$ = $1->addQualifiers( $2 ); }
2905 ;
2906
2907function_no_ptr:
2908 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2909 { $$ = $1->addParamList( $4 ); }
2910 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2911 { $$ = $2->addParamList( $6 ); }
2912 | '(' function_no_ptr ')' // redundant parenthesis
2913 { $$ = $2; }
2914 ;
2915
2916function_ptr:
2917 ptrref_operator function_declarator
2918 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2919 | ptrref_operator type_qualifier_list function_declarator
2920 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2921 | '(' function_ptr ')'
2922 { $$ = $2; }
2923 ;
2924
2925function_array:
2926 '(' function_ptr ')' array_dimension
2927 { $$ = $2->addArray( $4 ); }
2928 | '(' function_array ')' multi_array_dimension // redundant parenthesis
2929 { $$ = $2->addArray( $4 ); }
2930 | '(' function_array ')' // redundant parenthesis
2931 { $$ = $2; }
2932 ;
2933
2934// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2935//
2936// f( a, b, c ) int a, *b, c[]; {}
2937//
2938// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2939// returning arrays and functions versus pointers to arrays and functions.
2940
2941KR_function_declarator:
2942 KR_function_no_ptr
2943 | KR_function_ptr
2944 | KR_function_array
2945 ;
2946
2947KR_function_no_ptr:
2948 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2949 { $$ = $1->addIdList( $3 ); }
2950 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2951 { $$ = $2->addParamList( $6 ); }
2952 | '(' KR_function_no_ptr ')' // redundant parenthesis
2953 { $$ = $2; }
2954 ;
2955
2956KR_function_ptr:
2957 ptrref_operator KR_function_declarator
2958 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2959 | ptrref_operator type_qualifier_list KR_function_declarator
2960 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2961 | '(' KR_function_ptr ')'
2962 { $$ = $2; }
2963 ;
2964
2965KR_function_array:
2966 '(' KR_function_ptr ')' array_dimension
2967 { $$ = $2->addArray( $4 ); }
2968 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2969 { $$ = $2->addArray( $4 ); }
2970 | '(' KR_function_array ')' // redundant parenthesis
2971 { $$ = $2; }
2972 ;
2973
2974// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2975//
2976// typedef int foo;
2977// {
2978// int foo; // redefine typedef name in new scope
2979// }
2980//
2981// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2982// and functions versus pointers to arrays and functions.
2983
2984variable_type_redeclarator:
2985 paren_type attribute_list_opt
2986 { $$ = $1->addQualifiers( $2 ); }
2987 | type_ptr
2988 | type_array attribute_list_opt
2989 { $$ = $1->addQualifiers( $2 ); }
2990 | type_function attribute_list_opt
2991 { $$ = $1->addQualifiers( $2 ); }
2992 ;
2993
2994paren_type:
2995 typedef
2996 // hide type name in enclosing scope by variable name
2997 {
2998 // if ( ! typedefTable.existsCurr( *$1->name ) ) {
2999 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "ID" );
3000 // } else {
3001 // SemanticError( yylloc, string("'") + *$1->name + "' redeclared as different kind of symbol." ); $$ = nullptr;
3002 // } // if
3003 }
3004 | '(' paren_type ')'
3005 { $$ = $2; }
3006 ;
3007
3008type_ptr:
3009 ptrref_operator variable_type_redeclarator
3010 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3011 | ptrref_operator type_qualifier_list variable_type_redeclarator
3012 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3013 | '(' type_ptr ')' attribute_list_opt
3014 { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
3015 ;
3016
3017type_array:
3018 paren_type array_dimension
3019 { $$ = $1->addArray( $2 ); }
3020 | '(' type_ptr ')' array_dimension
3021 { $$ = $2->addArray( $4 ); }
3022 | '(' type_array ')' multi_array_dimension // redundant parenthesis
3023 { $$ = $2->addArray( $4 ); }
3024 | '(' type_array ')' // redundant parenthesis
3025 { $$ = $2; }
3026 ;
3027
3028type_function:
3029 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3030 { $$ = $1->addParamList( $4 ); }
3031 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3032 { $$ = $2->addParamList( $6 ); }
3033 | '(' type_function ')' // redundant parenthesis
3034 { $$ = $2; }
3035 ;
3036
3037// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3038// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3039// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3040// pointers to arrays and functions.
3041
3042identifier_parameter_declarator:
3043 paren_identifier attribute_list_opt
3044 { $$ = $1->addQualifiers( $2 ); }
3045 | '&' MUTEX paren_identifier attribute_list_opt
3046 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3047 | identifier_parameter_ptr
3048 | identifier_parameter_array attribute_list_opt
3049 { $$ = $1->addQualifiers( $2 ); }
3050 | identifier_parameter_function attribute_list_opt
3051 { $$ = $1->addQualifiers( $2 ); }
3052 ;
3053
3054identifier_parameter_ptr:
3055 ptrref_operator identifier_parameter_declarator
3056 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3057 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3058 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3059 | '(' identifier_parameter_ptr ')' attribute_list_opt
3060 { $$ = $2->addQualifiers( $4 ); }
3061 ;
3062
3063identifier_parameter_array:
3064 paren_identifier array_parameter_dimension
3065 { $$ = $1->addArray( $2 ); }
3066 | '(' identifier_parameter_ptr ')' array_dimension
3067 { $$ = $2->addArray( $4 ); }
3068 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3069 { $$ = $2->addArray( $4 ); }
3070 | '(' identifier_parameter_array ')' // redundant parenthesis
3071 { $$ = $2; }
3072 ;
3073
3074identifier_parameter_function:
3075 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3076 { $$ = $1->addParamList( $4 ); }
3077 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3078 { $$ = $2->addParamList( $6 ); }
3079 | '(' identifier_parameter_function ')' // redundant parenthesis
3080 { $$ = $2; }
3081 ;
3082
3083// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3084// e.g.:
3085//
3086// typedef int foo;
3087// forall( otype T ) struct foo;
3088// int f( int foo ); // redefine typedef name in new scope
3089//
3090// and allows the C99 array options, which can only appear in a parameter list.
3091
3092type_parameter_redeclarator:
3093 typedef attribute_list_opt
3094 { $$ = $1->addQualifiers( $2 ); }
3095 | '&' MUTEX typedef attribute_list_opt
3096 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3097 | type_parameter_ptr
3098 | type_parameter_array attribute_list_opt
3099 { $$ = $1->addQualifiers( $2 ); }
3100 | type_parameter_function attribute_list_opt
3101 { $$ = $1->addQualifiers( $2 ); }
3102 ;
3103
3104typedef:
3105 TYPEDEFname
3106 { $$ = DeclarationNode::newName( $1 ); }
3107 | TYPEGENname
3108 { $$ = DeclarationNode::newName( $1 ); }
3109 ;
3110
3111type_parameter_ptr:
3112 ptrref_operator type_parameter_redeclarator
3113 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3114 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3115 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3116 | '(' type_parameter_ptr ')' attribute_list_opt
3117 { $$ = $2->addQualifiers( $4 ); }
3118 ;
3119
3120type_parameter_array:
3121 typedef array_parameter_dimension
3122 { $$ = $1->addArray( $2 ); }
3123 | '(' type_parameter_ptr ')' array_parameter_dimension
3124 { $$ = $2->addArray( $4 ); }
3125 ;
3126
3127type_parameter_function:
3128 typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3129 { $$ = $1->addParamList( $4 ); }
3130 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3131 { $$ = $2->addParamList( $6 ); }
3132 ;
3133
3134// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3135// which the type applies, e.g.:
3136//
3137// sizeof( int );
3138// sizeof( int * );
3139// sizeof( int [10] );
3140// sizeof( int (*)() );
3141// sizeof( int () );
3142//
3143// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3144// and functions versus pointers to arrays and functions.
3145
3146abstract_declarator:
3147 abstract_ptr
3148 | abstract_array attribute_list_opt
3149 { $$ = $1->addQualifiers( $2 ); }
3150 | abstract_function attribute_list_opt
3151 { $$ = $1->addQualifiers( $2 ); }
3152 ;
3153
3154abstract_ptr:
3155 ptrref_operator
3156 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3157 | ptrref_operator type_qualifier_list
3158 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3159 | ptrref_operator abstract_declarator
3160 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3161 | ptrref_operator type_qualifier_list abstract_declarator
3162 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3163 | '(' abstract_ptr ')' attribute_list_opt
3164 { $$ = $2->addQualifiers( $4 ); }
3165 ;
3166
3167abstract_array:
3168 array_dimension
3169 | '(' abstract_ptr ')' array_dimension
3170 { $$ = $2->addArray( $4 ); }
3171 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3172 { $$ = $2->addArray( $4 ); }
3173 | '(' abstract_array ')' // redundant parenthesis
3174 { $$ = $2; }
3175 ;
3176
3177abstract_function:
3178 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3179 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3180 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3181 { $$ = $2->addParamList( $6 ); }
3182 | '(' abstract_function ')' // redundant parenthesis
3183 { $$ = $2; }
3184 ;
3185
3186array_dimension:
3187 // Only the first dimension can be empty.
3188 '[' ']'
3189 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3190 | '[' ']' multi_array_dimension
3191 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
3192 | '[' push assignment_expression pop ',' comma_expression ']'
3193 { $$ = DeclarationNode::newArray( $3, 0, false )->addArray( DeclarationNode::newArray( $6, 0, false ) ); }
3194 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3195 | multi_array_dimension
3196 ;
3197
3198multi_array_dimension:
3199 '[' push assignment_expression pop ']'
3200 { $$ = DeclarationNode::newArray( $3, 0, false ); }
3201 | '[' push '*' pop ']' // C99
3202 { $$ = DeclarationNode::newVarArray( 0 ); }
3203 | multi_array_dimension '[' push assignment_expression pop ']'
3204 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
3205 | multi_array_dimension '[' push '*' pop ']' // C99
3206 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3207 ;
3208
3209// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3210// identifier to which the type applies, e.g.:
3211//
3212// int f( int ); // not handled here
3213// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3214// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3215// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3216//
3217// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3218// and functions versus pointers to arrays and functions. In addition, the pattern handles the
3219// special meaning of parenthesis around a typedef name:
3220//
3221// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
3222// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
3223// not as redundant parentheses around the identifier."
3224//
3225// For example:
3226//
3227// typedef float T;
3228// int f( int ( T [5] ) ); // see abstract_parameter_declarator
3229// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
3230// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
3231// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
3232//
3233// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
3234// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
3235// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
3236// functions.
3237
3238abstract_parameter_declarator:
3239 abstract_parameter_ptr
3240 | '&' MUTEX attribute_list_opt
3241 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
3242 | abstract_parameter_array attribute_list_opt
3243 { $$ = $1->addQualifiers( $2 ); }
3244 | abstract_parameter_function attribute_list_opt
3245 { $$ = $1->addQualifiers( $2 ); }
3246 ;
3247
3248abstract_parameter_ptr:
3249 ptrref_operator
3250 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3251 | ptrref_operator type_qualifier_list
3252 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3253 | ptrref_operator abstract_parameter_declarator
3254 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3255 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3256 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3257 | '(' abstract_parameter_ptr ')' attribute_list_opt
3258 { $$ = $2->addQualifiers( $4 ); }
3259 ;
3260
3261abstract_parameter_array:
3262 array_parameter_dimension
3263 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3264 { $$ = $2->addArray( $4 ); }
3265 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3266 { $$ = $2->addArray( $4 ); }
3267 | '(' abstract_parameter_array ')' // redundant parenthesis
3268 { $$ = $2; }
3269 ;
3270
3271abstract_parameter_function:
3272 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3273 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3274 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3275 { $$ = $2->addParamList( $6 ); }
3276 | '(' abstract_parameter_function ')' // redundant parenthesis
3277 { $$ = $2; }
3278 ;
3279
3280array_parameter_dimension:
3281 // Only the first dimension can be empty or have qualifiers.
3282 array_parameter_1st_dimension
3283 | array_parameter_1st_dimension multi_array_dimension
3284 { $$ = $1->addArray( $2 ); }
3285 | multi_array_dimension
3286 ;
3287
3288// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3289//
3290// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3291// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3292
3293array_parameter_1st_dimension:
3294 '[' ']'
3295 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3296 // multi_array_dimension handles the '[' '*' ']' case
3297 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3298 { $$ = DeclarationNode::newVarArray( $3 ); }
3299 | '[' push type_qualifier_list pop ']'
3300 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3301 // multi_array_dimension handles the '[' assignment_expression ']' case
3302 | '[' push type_qualifier_list assignment_expression pop ']'
3303 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3304 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3305 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3306 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3307 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3308 ;
3309
3310// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3311//
3312// struct S {
3313// int;
3314// int *;
3315// int [10];
3316// int (*)();
3317// };
3318
3319variable_abstract_declarator:
3320 variable_abstract_ptr
3321 | variable_abstract_array attribute_list_opt
3322 { $$ = $1->addQualifiers( $2 ); }
3323 | variable_abstract_function attribute_list_opt
3324 { $$ = $1->addQualifiers( $2 ); }
3325 ;
3326
3327variable_abstract_ptr:
3328 ptrref_operator
3329 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3330 | ptrref_operator type_qualifier_list
3331 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3332 | ptrref_operator variable_abstract_declarator
3333 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3334 | ptrref_operator type_qualifier_list variable_abstract_declarator
3335 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3336 | '(' variable_abstract_ptr ')' attribute_list_opt
3337 { $$ = $2->addQualifiers( $4 ); }
3338 ;
3339
3340variable_abstract_array:
3341 array_dimension
3342 | '(' variable_abstract_ptr ')' array_dimension
3343 { $$ = $2->addArray( $4 ); }
3344 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3345 { $$ = $2->addArray( $4 ); }
3346 | '(' variable_abstract_array ')' // redundant parenthesis
3347 { $$ = $2; }
3348 ;
3349
3350variable_abstract_function:
3351 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3352 { $$ = $2->addParamList( $6 ); }
3353 | '(' variable_abstract_function ')' // redundant parenthesis
3354 { $$ = $2; }
3355 ;
3356
3357// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3358// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3359
3360cfa_identifier_parameter_declarator_tuple: // CFA
3361 cfa_identifier_parameter_declarator_no_tuple
3362 | cfa_abstract_tuple
3363 | type_qualifier_list cfa_abstract_tuple
3364 { $$ = $2->addQualifiers( $1 ); }
3365 ;
3366
3367cfa_identifier_parameter_declarator_no_tuple: // CFA
3368 cfa_identifier_parameter_ptr
3369 | cfa_identifier_parameter_array
3370 ;
3371
3372cfa_identifier_parameter_ptr: // CFA
3373 // No SUE declaration in parameter list.
3374 ptrref_operator type_specifier_nobody
3375 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3376 | type_qualifier_list ptrref_operator type_specifier_nobody
3377 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3378 | ptrref_operator cfa_abstract_function
3379 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3380 | type_qualifier_list ptrref_operator cfa_abstract_function
3381 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3382 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3383 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3384 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3385 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3386 ;
3387
3388cfa_identifier_parameter_array: // CFA
3389 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3390 // shift/reduce conflict with new-style empty (void) function return type.
3391 '[' ']' type_specifier_nobody
3392 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3393 | cfa_array_parameter_1st_dimension type_specifier_nobody
3394 { $$ = $2->addNewArray( $1 ); }
3395 | '[' ']' multi_array_dimension type_specifier_nobody
3396 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3397 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3398 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3399 | multi_array_dimension type_specifier_nobody
3400 { $$ = $2->addNewArray( $1 ); }
3401
3402 | '[' ']' cfa_identifier_parameter_ptr
3403 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3404 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3405 { $$ = $2->addNewArray( $1 ); }
3406 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3407 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3408 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3409 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3410 | multi_array_dimension cfa_identifier_parameter_ptr
3411 { $$ = $2->addNewArray( $1 ); }
3412 ;
3413
3414cfa_array_parameter_1st_dimension:
3415 '[' push type_qualifier_list '*' pop ']' // remaining C99
3416 { $$ = DeclarationNode::newVarArray( $3 ); }
3417 | '[' push type_qualifier_list assignment_expression pop ']'
3418 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3419 | '[' push declaration_qualifier_list assignment_expression pop ']'
3420 // declaration_qualifier_list must be used because of shift/reduce conflict with
3421 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3422 // appear in this context.
3423 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3424 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3425 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3426 ;
3427
3428// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3429// identifier to which the type applies, e.g.:
3430//
3431// [int] f( int ); // abstract variable parameter; no parameter name specified
3432// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3433//
3434// These rules need LR(3):
3435//
3436// cfa_abstract_tuple identifier_or_type_name
3437// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
3438//
3439// since a function return type can be syntactically identical to a tuple type:
3440//
3441// [int, int] t;
3442// [int, int] f( int );
3443//
3444// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3445// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3446// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3447// duplicated when appearing with cfa_function_specifier.
3448
3449cfa_abstract_declarator_tuple: // CFA
3450 cfa_abstract_tuple
3451 | type_qualifier_list cfa_abstract_tuple
3452 { $$ = $2->addQualifiers( $1 ); }
3453 | cfa_abstract_declarator_no_tuple
3454 ;
3455
3456cfa_abstract_declarator_no_tuple: // CFA
3457 cfa_abstract_ptr
3458 | cfa_abstract_array
3459 ;
3460
3461cfa_abstract_ptr: // CFA
3462 ptrref_operator type_specifier
3463 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3464 | type_qualifier_list ptrref_operator type_specifier
3465 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3466 | ptrref_operator cfa_abstract_function
3467 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3468 | type_qualifier_list ptrref_operator cfa_abstract_function
3469 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3470 | ptrref_operator cfa_abstract_declarator_tuple
3471 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3472 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3473 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3474 ;
3475
3476cfa_abstract_array: // CFA
3477 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3478 // empty (void) function return type.
3479 '[' ']' type_specifier
3480 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3481 | '[' ']' multi_array_dimension type_specifier
3482 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3483 | multi_array_dimension type_specifier
3484 { $$ = $2->addNewArray( $1 ); }
3485 | '[' ']' cfa_abstract_ptr
3486 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3487 | '[' ']' multi_array_dimension cfa_abstract_ptr
3488 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3489 | multi_array_dimension cfa_abstract_ptr
3490 { $$ = $2->addNewArray( $1 ); }
3491 ;
3492
3493cfa_abstract_tuple: // CFA
3494 '[' push cfa_abstract_parameter_list pop ']'
3495 { $$ = DeclarationNode::newTuple( $3 ); }
3496 | '[' push type_specifier_nobody ELLIPSIS pop ']'
3497 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3498 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
3499 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3500 ;
3501
3502cfa_abstract_function: // CFA
3503// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
3504// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3505 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
3506 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3507 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
3508 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3509 ;
3510
3511// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3512// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3513//
3514// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3515// the declaration specifiers in a declaration is an obsolescent feature."
3516//
3517// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3518// prototype-format parameter type declarators) is an obsolescent feature."
3519//
3520// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3521// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3522
3523//************************* MISCELLANEOUS ********************************
3524
3525comma_opt: // redundant comma
3526 // empty
3527 | ','
3528 ;
3529
3530default_initializer_opt:
3531 // empty
3532 { $$ = nullptr; }
3533 | '=' assignment_expression
3534 { $$ = $2; }
3535 ;
3536
3537%%
3538
3539// ----end of grammar----
3540
3541// Local Variables: //
3542// mode: c++ //
3543// tab-width: 4 //
3544// compile-command: "make install" //
3545// End: //
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