source: src/Parser/parser.yy@ ef94ae7

ADT ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since ef94ae7 was 15f769c, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago

add _DecimalXX to lexer/parser, but mark as unimplemented
  • Property mode set to 100644
File size: 145.2 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 : Sun Jun 20 18:46:51 2021
13// Update Count : 5023
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
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; // 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 VTABLE 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 DECIMAL32 DECIMAL64 DECIMAL128 // GCC
272%token ZERO_T ONE_T // CFA
273%token SIZEOF TYPEOF VALIST AUTO_TYPE // GCC
274%token OFFSETOF BASETYPEOF TYPEID // CFA
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 RESUME // CFA
280%token LABEL // GCC
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 FALLTHRU FALLTHROUGH WITH WHEN WAITFOR // CFA
285%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
286%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
287%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
288
289// names and constants: lexer differentiates between identifier and typedef names
290%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDIMname TYPEDEFname TYPEGENname
291%token<tok> TIMEOUT WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
292%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
293%token<tok> DIRECTIVE
294// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
295// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
296// converted into the tuple index (.)(1). e.g., 3.x
297%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
298
299// multi-character operators
300%token ARROW // ->
301%token ICR DECR // ++ --
302%token LS RS // << >>
303%token LE GE EQ NE // <= >= == !=
304%token ANDAND OROR // && ||
305%token ELLIPSIS // ...
306
307%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
308%token PLUSassign MINUSassign // += -=
309%token LSassign RSassign // <<= >>=
310%token ANDassign ERassign ORassign // &= ^= |=
311
312%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
313%token ATassign // @=
314
315%type<tok> identifier
316%type<tok> identifier_or_type_name attr_name
317%type<tok> quasi_keyword
318%type<constant> string_literal
319%type<str> string_literal_list
320
321// expressions
322%type<en> constant
323%type<en> tuple tuple_expression_list
324%type<op> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
325%type<en> primary_expression postfix_expression unary_expression
326%type<en> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
327%type<en> shift_expression relational_expression equality_expression
328%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
329%type<en> logical_AND_expression logical_OR_expression
330%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
331%type<en> comma_expression comma_expression_opt
332%type<en> argument_expression_list_opt argument_expression default_initializer_opt
333%type<ifctl> if_control_expression
334%type<fctl> for_control_expression for_control_expression_list
335%type<compop> inclexcl
336%type<en> subrange
337%type<decl> asm_name_opt
338%type<en> asm_operands_opt asm_operands_list asm_operand
339%type<label> label_list
340%type<en> asm_clobbers_list_opt
341%type<flag> asm_volatile_opt
342%type<en> handler_predicate_opt
343%type<genexpr> generic_association generic_assoc_list
344
345// statements
346%type<sn> statement labeled_statement compound_statement
347%type<sn> statement_decl statement_decl_list statement_list_nodecl
348%type<sn> selection_statement if_statement
349%type<sn> switch_clause_list_opt switch_clause_list
350%type<en> case_value
351%type<sn> case_clause case_value_list case_label case_label_list
352%type<sn> iteration_statement jump_statement
353%type<sn> expression_statement asm_statement
354%type<sn> with_statement
355%type<en> with_clause_opt
356%type<sn> exception_statement handler_clause finally_clause
357%type<catch_kind> handler_key
358%type<sn> mutex_statement
359%type<en> when_clause when_clause_opt waitfor timeout
360%type<sn> waitfor_statement
361%type<wfs> waitfor_clause
362
363// declarations
364%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
365%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
366%type<decl> abstract_parameter_declaration
367
368%type<aggKey> aggregate_key aggregate_data aggregate_control
369%type<decl> aggregate_type aggregate_type_nobody
370
371%type<decl> assertion assertion_list assertion_list_opt
372
373%type<en> bit_subrange_size_opt bit_subrange_size
374
375%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
376%type<decl> vtable vtable_opt default_opt
377
378%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
379
380%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
381%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
382
383%type<decl> elaborated_type elaborated_type_nobody
384
385%type<decl> enumerator_list enum_type enum_type_nobody
386%type<en> enumerator_value_opt
387
388%type<decl> external_definition external_definition_list external_definition_list_opt
389
390%type<decl> exception_declaration
391
392%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
393%type<en> field field_name_list field_name fraction_constants_opt
394
395%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
396
397%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
398%type<decl> identifier_list
399
400%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
401%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
402%type<decl> cfa_abstract_ptr cfa_abstract_tuple
403
404%type<decl> cfa_array_parameter_1st_dimension
405
406%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
407%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
408
409%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
410%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
411
412%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
413
414%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
415
416%type<decl> c_declaration static_assert
417%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
418%type<decl> KR_parameter_list KR_parameter_list_opt
419
420%type<decl> parameter_declaration parameter_list parameter_type_list_opt
421
422%type<decl> paren_identifier paren_type
423
424%type<decl> storage_class storage_class_list
425
426%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
427
428%type<tclass> type_class new_type_class
429%type<decl> type_declarator type_declarator_name type_declaring_list
430
431%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
432%type<decl> typedef_name typedef_declaration typedef_expression
433
434%type<decl> variable_type_redeclarator type_ptr type_array type_function
435
436%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
437
438%type<decl> type type_no_function
439%type<decl> type_parameter type_parameter_list type_initializer_opt
440
441%type<en> type_parameters_opt type_list
442
443%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
444%type<decl> type_specifier type_specifier_nobody
445
446%type<decl> variable_declarator variable_ptr variable_array variable_function
447%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
448
449%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
450
451// initializers
452%type<in> initializer initializer_list_opt initializer_opt
453
454// designators
455%type<en> designator designator_list designation
456
457
458// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
459// .---------. matches IF '(' comma_expression ')' statement . (reduce)
460// if ( C ) S1 else S2
461// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
462// Similar issues exit with the waitfor statement.
463
464// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
465// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
466%precedence THEN // rule precedence for IF/WAITFOR statement
467%precedence WOR // token precedence for start of WOR in WAITFOR statement
468%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
469%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
470%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
471%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
472%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
473%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
474%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
475
476
477// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
478// forall( otype T ) struct Foo { T v; };
479// .-----. matches pointer to function returning a generic (which is impossible without a type)
480// Foo ( *fp )( int );
481// `---' matches start of TYPEGENname '('
482// must be:
483// Foo( int ) ( *fp )( int );
484// The same problem occurs here:
485// forall( otype T ) struct Foo { T v; } ( *fp )( int );
486// must be:
487// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
488
489// Order of these lines matters (low-to-high precedence).
490%precedence TYPEGENname
491%precedence '}'
492%precedence '('
493
494// %precedence RESUME
495// %precedence '{'
496// %precedence ')'
497
498%locations // support location tracking for error messages
499
500%start translation_unit // parse-tree root
501
502%%
503//************************* Namespace Management ********************************
504
505// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
506// which are lexically identical.
507//
508// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
509// foo f; // to allow it to appear in this context
510//
511// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
512// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
513// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
514// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
515// must be distinguished by the lexical scanner.
516//
517// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
518// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
519// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
520// each context that introduces a name scope, a new level is created in the type table and that level is popped on
521// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
522// This requires distinguishing between type names that are local to the current declaration scope and those that
523// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
524//
525// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
526// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
527// around the list separator.
528//
529// int f( forall(T) T (*f1) T , forall( S ) S (*f2)( S ) );
530// push pop push pop
531
532push:
533 { typedefTable.enterScope(); }
534 ;
535
536pop:
537 { typedefTable.leaveScope(); }
538 ;
539
540//************************* CONSTANTS ********************************
541
542constant:
543 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
544 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
545 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
546 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
547 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
548 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
549 ;
550
551quasi_keyword: // CFA
552 TIMEOUT
553 | WOR
554 | CATCH
555 | RECOVER
556 | CATCHRESUME
557 | FIXUP
558 | FINALLY
559 ;
560
561identifier:
562 IDENTIFIER
563 | quasi_keyword
564 | '@' // CFA
565 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
566 ;
567
568string_literal:
569 string_literal_list { $$ = build_constantStr( *$1 ); }
570 ;
571
572string_literal_list: // juxtaposed strings are concatenated
573 STRINGliteral { $$ = $1; } // conversion from tok to str
574 | string_literal_list STRINGliteral
575 {
576 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
577 delete $2; // allocated by lexer
578 $$ = $1; // conversion from tok to str
579 }
580 ;
581
582//************************* EXPRESSIONS ********************************
583
584primary_expression:
585 IDENTIFIER // typedef name cannot be used as a variable name
586 { $$ = new ExpressionNode( build_varref( $1 ) ); }
587 | quasi_keyword
588 { $$ = new ExpressionNode( build_varref( $1 ) ); }
589 | TYPEDIMname // CFA, generic length argument
590 // { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( DeclarationNode::newFromTypedef( $1 ) ) ) ); }
591 // { $$ = new ExpressionNode( build_varref( $1 ) ); }
592 { $$ = new ExpressionNode( build_dimensionref( $1 ) ); }
593 | tuple
594 | '(' comma_expression ')'
595 { $$ = $2; }
596 | '(' compound_statement ')' // GCC, lambda expression
597 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast<CompoundStmt *>(maybeMoveBuild<Statement>($2) ) ) ); }
598 | type_name '.' identifier // CFA, nested type
599 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
600 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
601 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
602 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
603 {
604 // add the missing control expression to the GenericExpr and return it
605 $5->control = maybeMoveBuild<Expression>( $3 );
606 $$ = new ExpressionNode( $5 );
607 }
608 // | RESUME '(' comma_expression ')'
609 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
610 // | RESUME '(' comma_expression ')' compound_statement
611 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
612 ;
613
614generic_assoc_list: // C11
615 generic_association
616 | generic_assoc_list ',' generic_association
617 {
618 // steal the association node from the singleton and delete the wrapper
619 $1->associations.splice($1->associations.end(), $3->associations);
620 delete $3;
621 $$ = $1;
622 }
623 ;
624
625generic_association: // C11
626 type_no_function ':' assignment_expression
627 {
628 // create a GenericExpr wrapper with one association pair
629 $$ = new GenericExpr( nullptr, { { maybeMoveBuildType($1), maybeMoveBuild<Expression>( $3 ) } } );
630 }
631 | DEFAULT ':' assignment_expression
632 { $$ = new GenericExpr( nullptr, { { maybeMoveBuild<Expression>( $3 ) } } ); }
633 ;
634
635postfix_expression:
636 primary_expression
637 | postfix_expression '[' assignment_expression ',' comma_expression ']'
638 // { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, new ExpressionNode( build_binary_val( OperKinds::Index, $3, $5 ) ) ) ); }
639 { SemanticError( yylloc, "New array subscript is currently unimplemented." ); $$ = nullptr; }
640 | postfix_expression '[' assignment_expression ']'
641 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
642 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
643 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
644 // equivalent to the old x[i,j].
645 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
646 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
647 {
648 Token fn;
649 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
650 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
651 }
652 | postfix_expression '(' argument_expression_list_opt ')'
653 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
654 | postfix_expression '`' identifier // CFA, postfix call
655 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
656 | constant '`' identifier // CFA, postfix call
657 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
658 | string_literal '`' identifier // CFA, postfix call
659 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), new ExpressionNode( $1 ) ) ); }
660 | postfix_expression '.' identifier
661 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
662 | postfix_expression '.' INTEGERconstant // CFA, tuple index
663 { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); }
664 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
665 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
666 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
667 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
668 | postfix_expression '.' aggregate_control
669 { $$ = new ExpressionNode( build_keyword_cast( $3, $1 ) ); }
670 | postfix_expression ARROW identifier
671 { $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
672 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
673 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
674 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
675 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
676 | postfix_expression ICR
677 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
678 | postfix_expression DECR
679 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
680 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
681 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
682 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
683 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
684 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
685 {
686 Token fn;
687 fn.str = new string( "^?{}" ); // location undefined
688 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
689 }
690 ;
691
692argument_expression_list_opt:
693 // empty
694 { $$ = nullptr; }
695 | argument_expression
696 | argument_expression_list_opt ',' argument_expression
697 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
698 ;
699
700argument_expression:
701 '@' // CFA, default parameter
702 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
703 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
704 | assignment_expression
705 ;
706
707field_name_list: // CFA, tuple field selector
708 field
709 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
710 ;
711
712field: // CFA, tuple field selector
713 field_name
714 | FLOATING_DECIMALconstant field
715 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
716 | FLOATING_DECIMALconstant '[' field_name_list ']'
717 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); }
718 | field_name '.' field
719 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
720 | field_name '.' '[' field_name_list ']'
721 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
722 | field_name ARROW field
723 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
724 | field_name ARROW '[' field_name_list ']'
725 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
726 ;
727
728field_name:
729 INTEGERconstant fraction_constants_opt
730 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
731 | FLOATINGconstant fraction_constants_opt
732 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
733 | identifier fraction_constants_opt
734 {
735 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
736 }
737 ;
738
739fraction_constants_opt:
740 // empty
741 { $$ = nullptr; }
742 | fraction_constants_opt FLOATING_FRACTIONconstant
743 {
744 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
745 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
746 }
747 ;
748
749unary_expression:
750 postfix_expression
751 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
752 // semantics checks, e.g., ++3, 3--, *3, &&3
753 | constant
754 | string_literal
755 { $$ = new ExpressionNode( $1 ); }
756 | EXTENSION cast_expression // GCC
757 { $$ = $2->set_extension( true ); }
758 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
759 // { * X; } // dereference X
760 // { * int X; } // CFA declaration of pointer to int
761 | ptrref_operator cast_expression // CFA
762 {
763 switch ( $1 ) {
764 case OperKinds::AddressOf:
765 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) );
766 break;
767 case OperKinds::PointTo:
768 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
769 break;
770 case OperKinds::And:
771 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) ) );
772 break;
773 default:
774 assert( false );
775 }
776 }
777 | unary_operator cast_expression
778 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
779 | ICR unary_expression
780 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
781 | DECR unary_expression
782 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
783 | SIZEOF unary_expression
784 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
785 | SIZEOF '(' type_no_function ')'
786 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
787 | ALIGNOF unary_expression // GCC, variable alignment
788 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
789 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
790 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
791 | OFFSETOF '(' type_no_function ',' identifier ')'
792 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
793 | TYPEID '(' type_no_function ')'
794 {
795 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
796 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
797 }
798 ;
799
800ptrref_operator:
801 '*' { $$ = OperKinds::PointTo; }
802 | '&' { $$ = OperKinds::AddressOf; }
803 // GCC, address of label must be handled by semantic check for ref,ref,label
804 | ANDAND { $$ = OperKinds::And; }
805 ;
806
807unary_operator:
808 '+' { $$ = OperKinds::UnPlus; }
809 | '-' { $$ = OperKinds::UnMinus; }
810 | '!' { $$ = OperKinds::Neg; }
811 | '~' { $$ = OperKinds::BitNeg; }
812 ;
813
814cast_expression:
815 unary_expression
816 | '(' type_no_function ')' cast_expression
817 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
818 | '(' aggregate_control '&' ')' cast_expression // CFA
819 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
820 | '(' aggregate_control '*' ')' cast_expression // CFA
821 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
822 | '(' VIRTUAL ')' cast_expression // CFA
823 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $4 ), maybeMoveBuildType( nullptr ) ) ); }
824 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
825 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $5 ), maybeMoveBuildType( $3 ) ) ); }
826 | '(' RETURN type_no_function ')' cast_expression // CFA
827 { SemanticError( yylloc, "Return cast is currently unimplemented." ); $$ = nullptr; }
828 | '(' COERCE type_no_function ')' cast_expression // CFA
829 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
830 | '(' qualifier_cast_list ')' cast_expression // CFA
831 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
832// | '(' type_no_function ')' tuple
833// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
834 ;
835
836qualifier_cast_list:
837 cast_modifier type_qualifier_name
838 | cast_modifier MUTEX
839 | qualifier_cast_list cast_modifier type_qualifier_name
840 | qualifier_cast_list cast_modifier MUTEX
841 ;
842
843cast_modifier:
844 '-'
845 | '+'
846 ;
847
848exponential_expression:
849 cast_expression
850 | exponential_expression '\\' cast_expression
851 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
852 ;
853
854multiplicative_expression:
855 exponential_expression
856 | multiplicative_expression '*' exponential_expression
857 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
858 | multiplicative_expression '/' exponential_expression
859 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
860 | multiplicative_expression '%' exponential_expression
861 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
862 ;
863
864additive_expression:
865 multiplicative_expression
866 | additive_expression '+' multiplicative_expression
867 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
868 | additive_expression '-' multiplicative_expression
869 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
870 ;
871
872shift_expression:
873 additive_expression
874 | shift_expression LS additive_expression
875 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
876 | shift_expression RS additive_expression
877 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
878 ;
879
880relational_expression:
881 shift_expression
882 | relational_expression '<' shift_expression
883 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
884 | relational_expression '>' shift_expression
885 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
886 | relational_expression LE shift_expression
887 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
888 | relational_expression GE shift_expression
889 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
890 ;
891
892equality_expression:
893 relational_expression
894 | equality_expression EQ relational_expression
895 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
896 | equality_expression NE relational_expression
897 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
898 ;
899
900AND_expression:
901 equality_expression
902 | AND_expression '&' equality_expression
903 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
904 ;
905
906exclusive_OR_expression:
907 AND_expression
908 | exclusive_OR_expression '^' AND_expression
909 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
910 ;
911
912inclusive_OR_expression:
913 exclusive_OR_expression
914 | inclusive_OR_expression '|' exclusive_OR_expression
915 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
916 ;
917
918logical_AND_expression:
919 inclusive_OR_expression
920 | logical_AND_expression ANDAND inclusive_OR_expression
921 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
922 ;
923
924logical_OR_expression:
925 logical_AND_expression
926 | logical_OR_expression OROR logical_AND_expression
927 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
928 ;
929
930conditional_expression:
931 logical_OR_expression
932 | logical_OR_expression '?' comma_expression ':' conditional_expression
933 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
934 // FIX ME: computes $1 twice
935 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
936 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
937 ;
938
939constant_expression:
940 conditional_expression
941 ;
942
943assignment_expression:
944 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
945 conditional_expression
946 | unary_expression assignment_operator assignment_expression
947 {
948// if ( $2 == OperKinds::AtAssn ) {
949// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
950// } else {
951 $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) );
952// } // if
953 }
954 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
955 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
956 ;
957
958assignment_expression_opt:
959 // empty
960 { $$ = nullptr; }
961 | assignment_expression
962 ;
963
964assignment_operator:
965 simple_assignment_operator
966 | compound_assignment_operator
967 ;
968
969simple_assignment_operator:
970 '=' { $$ = OperKinds::Assign; }
971 | ATassign { $$ = OperKinds::AtAssn; } // CFA
972 ;
973
974compound_assignment_operator:
975 EXPassign { $$ = OperKinds::ExpAssn; }
976 | MULTassign { $$ = OperKinds::MulAssn; }
977 | DIVassign { $$ = OperKinds::DivAssn; }
978 | MODassign { $$ = OperKinds::ModAssn; }
979 | PLUSassign { $$ = OperKinds::PlusAssn; }
980 | MINUSassign { $$ = OperKinds::MinusAssn; }
981 | LSassign { $$ = OperKinds::LSAssn; }
982 | RSassign { $$ = OperKinds::RSAssn; }
983 | ANDassign { $$ = OperKinds::AndAssn; }
984 | ERassign { $$ = OperKinds::ERAssn; }
985 | ORassign { $$ = OperKinds::OrAssn; }
986 ;
987
988tuple: // CFA, tuple
989 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
990 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
991// '[' ']'
992// { $$ = new ExpressionNode( build_tuple() ); }
993// | '[' push assignment_expression pop ']'
994// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
995 '[' ',' tuple_expression_list ']'
996 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
997 | '[' push assignment_expression pop ',' tuple_expression_list ']'
998 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)($3->set_last( $6 ) ) )); }
999 ;
1000
1001tuple_expression_list:
1002 assignment_expression
1003 | '@' // CFA
1004 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1005 | tuple_expression_list ',' assignment_expression
1006 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1007 | tuple_expression_list ',' '@'
1008 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1009 ;
1010
1011comma_expression:
1012 assignment_expression
1013 | comma_expression ',' assignment_expression
1014 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1015 ;
1016
1017comma_expression_opt:
1018 // empty
1019 { $$ = nullptr; }
1020 | comma_expression
1021 ;
1022
1023//*************************** STATEMENTS *******************************
1024
1025statement:
1026 labeled_statement
1027 | compound_statement
1028 | expression_statement
1029 | selection_statement
1030 | iteration_statement
1031 | jump_statement
1032 | with_statement
1033 | mutex_statement
1034 | waitfor_statement
1035 | exception_statement
1036 | enable_disable_statement
1037 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1038 | asm_statement
1039 | DIRECTIVE
1040 { $$ = new StatementNode( build_directive( $1 ) ); }
1041 ;
1042
1043labeled_statement:
1044 // labels cannot be identifiers 0 or 1
1045 identifier_or_type_name ':' attribute_list_opt statement
1046 { $$ = $4->add_label( $1, $3 ); }
1047 ;
1048
1049compound_statement:
1050 '{' '}'
1051 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
1052 | '{' push
1053 local_label_declaration_opt // GCC, local labels appear at start of block
1054 statement_decl_list // C99, intermix declarations and statements
1055 pop '}'
1056 { $$ = new StatementNode( build_compound( $4 ) ); }
1057 ;
1058
1059statement_decl_list: // C99
1060 statement_decl
1061 | statement_decl_list statement_decl
1062 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1063 ;
1064
1065statement_decl:
1066 declaration // CFA, new & old style declarations
1067 { $$ = new StatementNode( $1 ); }
1068 | EXTENSION declaration // GCC
1069 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1070 | function_definition
1071 { $$ = new StatementNode( $1 ); }
1072 | EXTENSION function_definition // GCC
1073 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1074 | statement
1075 ;
1076
1077statement_list_nodecl:
1078 statement
1079 | statement_list_nodecl statement
1080 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1081 ;
1082
1083expression_statement:
1084 comma_expression_opt ';'
1085 { $$ = new StatementNode( build_expr( $1 ) ); }
1086 ;
1087
1088selection_statement:
1089 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
1090 // the inherent S/R conflict with THEN/ELSE.
1091 push if_statement pop
1092 { $$ = $2; }
1093 | SWITCH '(' comma_expression ')' case_clause
1094 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
1095 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1096 {
1097 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
1098 // The semantics of the declaration list is changed to include associated initialization, which is performed
1099 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1100 // statement around the switch. Statements after the initial declaration list can never be executed, and
1101 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1102 // statement.
1103 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1104 }
1105 | CHOOSE '(' comma_expression ')' case_clause // CFA
1106 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
1107 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1108 {
1109 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
1110 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1111 }
1112 ;
1113
1114if_statement:
1115 IF '(' if_control_expression ')' statement %prec THEN
1116 // explicitly deal with the shift/reduce conflict on if/else
1117 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), nullptr ) ); }
1118 | IF '(' if_control_expression ')' statement ELSE statement
1119 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), maybe_build_compound( $7 ) ) ); }
1120 ;
1121
1122if_control_expression:
1123 comma_expression
1124 { $$ = new IfCtrl( nullptr, $1 ); }
1125 | c_declaration // no semi-colon
1126 { $$ = new IfCtrl( $1, nullptr ); }
1127 | cfa_declaration // no semi-colon
1128 { $$ = new IfCtrl( $1, nullptr ); }
1129 | declaration comma_expression // semi-colon separated
1130 { $$ = new IfCtrl( $1, $2 ); }
1131 ;
1132
1133// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1134// clause allows a list of values and subranges.
1135
1136case_value: // CFA
1137 constant_expression { $$ = $1; }
1138 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1139 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1140 | subrange // CFA, subrange
1141 ;
1142
1143case_value_list: // CFA
1144 case_value { $$ = new StatementNode( build_case( $1 ) ); }
1145 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1146 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
1147 ;
1148
1149case_label: // CFA
1150 CASE case_value_list ':' { $$ = $2; }
1151 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
1152 // A semantic check is required to ensure only one default clause per switch/choose statement.
1153 ;
1154
1155//label_list_opt:
1156// // empty
1157// | identifier_or_type_name ':'
1158// | label_list_opt identifier_or_type_name ':'
1159// ;
1160
1161case_label_list: // CFA
1162 case_label
1163 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
1164 ;
1165
1166case_clause: // CFA
1167 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( $2 ) ); }
1168 ;
1169
1170switch_clause_list_opt: // CFA
1171 // empty
1172 { $$ = nullptr; }
1173 | switch_clause_list
1174 ;
1175
1176switch_clause_list: // CFA
1177 case_label_list statement_list_nodecl
1178 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1179 | switch_clause_list case_label_list statement_list_nodecl
1180 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
1181 ;
1182
1183iteration_statement:
1184 WHILE '(' push if_control_expression ')' statement pop
1185 { $$ = new StatementNode( build_while( $4, maybe_build_compound( $6 ) ) ); }
1186 | WHILE '(' ')' statement // CFA => while ( 1 )
1187 { $$ = new StatementNode( build_while( new IfCtrl( nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ), maybe_build_compound( $4 ) ) ); }
1188 | DO statement WHILE '(' comma_expression ')' ';'
1189 { $$ = new StatementNode( build_do_while( $5, maybe_build_compound( $2 ) ) ); }
1190 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1191 { $$ = new StatementNode( build_do_while( new ExpressionNode( build_constantInteger( *new string( "1" ) ) ), maybe_build_compound( $2 ) ) ); }
1192 | FOR '(' push for_control_expression_list ')' statement pop
1193 { $$ = new StatementNode( build_for( $4, maybe_build_compound( $6 ) ) ); }
1194 | FOR '(' ')' statement // CFA => for ( ;; )
1195 { $$ = new StatementNode( build_for( new ForCtrl( (ExpressionNode * )nullptr, (ExpressionNode * )nullptr, (ExpressionNode * )nullptr ), maybe_build_compound( $4 ) ) ); }
1196 ;
1197
1198for_control_expression_list:
1199 for_control_expression
1200 | for_control_expression_list ':' for_control_expression
1201 // ForCtrl + ForCtrl:
1202 // init + init => multiple declaration statements that are hoisted
1203 // condition + condition => (expression) && (expression)
1204 // change + change => (expression), (expression)
1205 {
1206 $1->init->set_last( $3->init );
1207 if ( $1->condition ) {
1208 if ( $3->condition ) {
1209 $1->condition->expr.reset( new LogicalExpr( $1->condition->expr.release(), $3->condition->expr.release(), true ) );
1210 } // if
1211 } else $1->condition = $3->condition;
1212 if ( $1->change ) {
1213 if ( $3->change ) {
1214 $1->change->expr.reset( new CommaExpr( $1->change->expr.release(), $3->change->expr.release() ) );
1215 } // if
1216 } else $1->change = $3->change;
1217 $$ = $1;
1218 }
1219 ;
1220
1221for_control_expression:
1222 ';' comma_expression_opt ';' comma_expression_opt
1223 { $$ = new ForCtrl( (ExpressionNode * )nullptr, $2, $4 ); }
1224 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1225 { $$ = new ForCtrl( $1, $3, $5 ); }
1226 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1227 { $$ = new ForCtrl( $1, $2, $4 ); }
1228
1229 | comma_expression // CFA
1230 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1231 OperKinds::LThan, $1->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1232 | '=' comma_expression // CFA
1233 { $$ = forCtrl( $2, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1234 OperKinds::LEThan, $2->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1235 | comma_expression inclexcl comma_expression // CFA
1236 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1237 | comma_expression inclexcl comma_expression '~' comma_expression // CFA
1238 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, $5 ); }
1239 | comma_expression ';' // CFA
1240 { $$ = forCtrl( new ExpressionNode( build_constantInteger( *new string( "0u" ) ) ), $1, nullptr, OperKinds::LThan, nullptr, nullptr ); }
1241 | comma_expression ';' comma_expression // CFA
1242 { $$ = forCtrl( $3, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1243 OperKinds::LThan, $3->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1244 | comma_expression ';' '=' comma_expression // CFA
1245 { $$ = forCtrl( $4, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1246 OperKinds::LEThan, $4->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1247 | comma_expression ';' comma_expression inclexcl comma_expression // CFA
1248 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1249 | comma_expression ';' comma_expression inclexcl comma_expression '~' comma_expression // CFA
1250 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, $7 ); }
1251
1252 | comma_expression ';' TYPEDEFname // CFA, array type
1253 {
1254 SemanticError( yylloc, "Array interator is currently unimplemented." ); $$ = nullptr;
1255 $$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1256 }
1257
1258 // There is a S/R conflicit if ~ and -~ are factored out.
1259 | comma_expression ';' comma_expression '~' '@' // CFA
1260 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1261 | comma_expression ';' comma_expression ErangeDown '@' // CFA
1262 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1263 | comma_expression ';' comma_expression '~' '@' '~' comma_expression // CFA
1264 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, $7 ); }
1265 | comma_expression ';' comma_expression ErangeDown '@' '~' comma_expression // CFA
1266 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, $7 ); }
1267 | comma_expression ';' comma_expression '~' '@' '~' '@' // CFA
1268 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, nullptr ); }
1269 ;
1270
1271inclexcl:
1272 '~'
1273 { $$ = OperKinds::LThan; }
1274 | ErangeUpEq
1275 { $$ = OperKinds::LEThan; }
1276 | ErangeDown
1277 { $$ = OperKinds::GThan; }
1278 | ErangeDownEq
1279 { $$ = OperKinds::GEThan; }
1280 ;
1281
1282jump_statement:
1283 GOTO identifier_or_type_name ';'
1284 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1285 | GOTO '*' comma_expression ';' // GCC, computed goto
1286 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1287 // whereas normal operator precedence yields goto (*i)+3;
1288 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1289 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1290 | fall_through_name ';' // CFA
1291 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1292 | fall_through_name identifier_or_type_name ';' // CFA
1293 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1294 | fall_through_name DEFAULT ';' // CFA
1295 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1296 | CONTINUE ';'
1297 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1298 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1299 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1300 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1301 // the target of the transfer appears only at the start of an iteration statement.
1302 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1303 | BREAK ';'
1304 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1305 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1306 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1307 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1308 // the target of the transfer appears only at the start of an iteration statement.
1309 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1310 | RETURN comma_expression_opt ';'
1311 { $$ = new StatementNode( build_return( $2 ) ); }
1312 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1313 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1314 | SUSPEND ';'
1315 { $$ = new StatementNode( build_suspend( nullptr ) ); }
1316 | SUSPEND compound_statement
1317 { $$ = new StatementNode( build_suspend( $2 ) ); }
1318 | SUSPEND COROUTINE ';'
1319 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Coroutine ) ); }
1320 | SUSPEND COROUTINE compound_statement
1321 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Coroutine ) ); }
1322 | SUSPEND GENERATOR ';'
1323 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Generator ) ); }
1324 | SUSPEND GENERATOR compound_statement
1325 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Generator ) ); }
1326 | THROW assignment_expression_opt ';' // handles rethrow
1327 { $$ = new StatementNode( build_throw( $2 ) ); }
1328 | THROWRESUME assignment_expression_opt ';' // handles reresume
1329 { $$ = new StatementNode( build_resume( $2 ) ); }
1330 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1331 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1332 ;
1333
1334fall_through_name: // CFA
1335 FALLTHRU
1336 | FALLTHROUGH
1337 ;
1338
1339with_statement:
1340 WITH '(' tuple_expression_list ')' statement
1341 {
1342 $$ = new StatementNode( build_with( $3, $5 ) );
1343 }
1344 ;
1345
1346// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1347mutex_statement:
1348 MUTEX '(' argument_expression_list_opt ')' statement
1349 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; }
1350 ;
1351
1352when_clause:
1353 WHEN '(' comma_expression ')' { $$ = $3; }
1354 ;
1355
1356when_clause_opt:
1357 // empty
1358 { $$ = nullptr; }
1359 | when_clause
1360 ;
1361
1362waitfor:
1363 WAITFOR '(' cast_expression ')'
1364 { $$ = $3; }
1365// | WAITFOR '(' cast_expression ',' argument_expression_list_opt ')'
1366// { $$ = (ExpressionNode *)$3->set_last( $5 ); }
1367 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1368 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1369 ;
1370
1371cast_expression_list:
1372 cast_expression
1373 | cast_expression_list ',' cast_expression
1374 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1375 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1376 ;
1377
1378timeout:
1379 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1380 ;
1381
1382waitfor_clause:
1383 when_clause_opt waitfor statement %prec THEN
1384 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1 ); }
1385 | when_clause_opt waitfor statement WOR waitfor_clause
1386 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1, $5 ); }
1387 | when_clause_opt timeout statement %prec THEN
1388 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1 ); }
1389 | when_clause_opt ELSE statement
1390 { $$ = build_waitfor_timeout( nullptr, maybe_build_compound( $3 ), $1 ); }
1391 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1392 | when_clause_opt timeout statement WOR ELSE statement
1393 { SemanticError( yylloc, "else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1394 | when_clause_opt timeout statement WOR when_clause ELSE statement
1395 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1, maybe_build_compound( $7 ), $5 ); }
1396 ;
1397
1398waitfor_statement:
1399 when_clause_opt waitfor statement %prec THEN
1400 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1401 | when_clause_opt waitfor statement WOR waitfor_clause
1402 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1403 ;
1404
1405exception_statement:
1406 TRY compound_statement handler_clause %prec THEN
1407 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1408 | TRY compound_statement finally_clause
1409 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1410 | TRY compound_statement handler_clause finally_clause
1411 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1412 ;
1413
1414handler_clause:
1415 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1416 { $$ = new StatementNode( build_catch( $1, $4, $6, $8 ) ); }
1417 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1418 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $5, $7, $9 ) ) ); }
1419 ;
1420
1421handler_predicate_opt:
1422 // empty
1423 { $$ = nullptr; }
1424 | ';' conditional_expression { $$ = $2; }
1425 ;
1426
1427handler_key:
1428 CATCH { $$ = CatchStmt::Terminate; }
1429 | RECOVER { $$ = CatchStmt::Terminate; }
1430 | CATCHRESUME { $$ = CatchStmt::Resume; }
1431 | FIXUP { $$ = CatchStmt::Resume; }
1432 ;
1433
1434finally_clause:
1435 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1436 ;
1437
1438exception_declaration:
1439 // No SUE declaration in parameter list.
1440 type_specifier_nobody
1441 | type_specifier_nobody declarator
1442 { $$ = $2->addType( $1 ); }
1443 | type_specifier_nobody variable_abstract_declarator
1444 { $$ = $2->addType( $1 ); }
1445 | cfa_abstract_declarator_tuple identifier // CFA
1446 { $$ = $1->addName( $2 ); }
1447 | cfa_abstract_declarator_tuple // CFA
1448 ;
1449
1450enable_disable_statement:
1451 enable_disable_key identifier_list compound_statement
1452 ;
1453
1454enable_disable_key:
1455 ENABLE
1456 | DISABLE
1457 ;
1458
1459asm_statement:
1460 ASM asm_volatile_opt '(' string_literal ')' ';'
1461 { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
1462 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1463 { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
1464 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1465 { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); }
1466 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1467 { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
1468 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1469 { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
1470 ;
1471
1472asm_volatile_opt: // GCC
1473 // empty
1474 { $$ = false; }
1475 | VOLATILE
1476 { $$ = true; }
1477 ;
1478
1479asm_operands_opt: // GCC
1480 // empty
1481 { $$ = nullptr; } // use default argument
1482 | asm_operands_list
1483 ;
1484
1485asm_operands_list: // GCC
1486 asm_operand
1487 | asm_operands_list ',' asm_operand
1488 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1489 ;
1490
1491asm_operand: // GCC
1492 string_literal '(' constant_expression ')'
1493 { $$ = new ExpressionNode( new AsmExpr( nullptr, $1, maybeMoveBuild<Expression>( $3 ) ) ); }
1494 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1495 { $$ = new ExpressionNode( new AsmExpr( $2, $4, maybeMoveBuild<Expression>( $6 ) ) ); }
1496 ;
1497
1498asm_clobbers_list_opt: // GCC
1499 // empty
1500 { $$ = nullptr; } // use default argument
1501 | string_literal
1502 { $$ = new ExpressionNode( $1 ); }
1503 | asm_clobbers_list_opt ',' string_literal
1504 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( $3 ) )); }
1505 ;
1506
1507label_list:
1508 identifier
1509 {
1510 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1511 delete $1; // allocated by lexer
1512 }
1513 | label_list ',' identifier
1514 {
1515 $$ = $1; $1->labels.push_back( *$3 );
1516 delete $3; // allocated by lexer
1517 }
1518 ;
1519
1520//******************************* DECLARATIONS *********************************
1521
1522declaration_list_opt: // used at beginning of switch statement
1523 // empty
1524 { $$ = nullptr; }
1525 | declaration_list
1526 ;
1527
1528declaration_list:
1529 declaration
1530 | declaration_list declaration
1531 { $$ = $1->appendList( $2 ); }
1532 ;
1533
1534KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1535 // empty
1536 { $$ = nullptr; }
1537 | KR_parameter_list
1538 ;
1539
1540KR_parameter_list:
1541 push c_declaration pop ';'
1542 { $$ = $2; }
1543 | KR_parameter_list push c_declaration pop ';'
1544 { $$ = $1->appendList( $3 ); }
1545 ;
1546
1547local_label_declaration_opt: // GCC, local label
1548 // empty
1549 | local_label_declaration_list
1550 ;
1551
1552local_label_declaration_list: // GCC, local label
1553 LABEL local_label_list ';'
1554 | local_label_declaration_list LABEL local_label_list ';'
1555 ;
1556
1557local_label_list: // GCC, local label
1558 identifier_or_type_name
1559 | local_label_list ',' identifier_or_type_name
1560 ;
1561
1562declaration: // old & new style declarations
1563 c_declaration ';'
1564 | cfa_declaration ';' // CFA
1565 | static_assert // C11
1566 ;
1567
1568static_assert:
1569 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1570 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
1571 | STATICASSERT '(' constant_expression ')' ';' // CFA
1572 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( *new string( "\"\"" ) ) ); }
1573
1574// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1575// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1576// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1577// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1578// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1579// block, but cannot be mixed within a specific declaration.
1580//
1581// CFA C
1582// [10] int x; int x[10]; // array of 10 integers
1583// [10] * char y; char *y[10]; // array of 10 pointers to char
1584
1585cfa_declaration: // CFA
1586 cfa_variable_declaration
1587 | cfa_typedef_declaration
1588 | cfa_function_declaration
1589 | type_declaring_list
1590 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1591 | trait_specifier
1592 ;
1593
1594cfa_variable_declaration: // CFA
1595 cfa_variable_specifier initializer_opt
1596 { $$ = $1->addInitializer( $2 ); }
1597 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1598 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1599 // them as a type_qualifier cannot appear in that context.
1600 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
1601 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1602 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
1603 ;
1604
1605cfa_variable_specifier: // CFA
1606 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1607 // storage-class
1608 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1609 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1610 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1611 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1612 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1613 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
1614 ;
1615
1616cfa_function_declaration: // CFA
1617 cfa_function_specifier
1618 | type_qualifier_list cfa_function_specifier
1619 { $$ = $2->addQualifiers( $1 ); }
1620 | declaration_qualifier_list cfa_function_specifier
1621 { $$ = $2->addQualifiers( $1 ); }
1622 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1623 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
1624 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
1625 {
1626 // Append the return type at the start (left-hand-side) to each identifier in the list.
1627 DeclarationNode * ret = new DeclarationNode;
1628 ret->type = maybeClone( $1->type->base );
1629 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
1630 }
1631 ;
1632
1633cfa_function_specifier: // CFA
1634// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
1635// {
1636// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1637// }
1638// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
1639// {
1640// typedefTable.setNextIdentifier( *$5 );
1641// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1642// }
1643// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
1644// {
1645// typedefTable.setNextIdentifier( *$5 );
1646// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1647// }
1648// | '[' ']' typegen_name
1649 // identifier_or_type_name must be broken apart because of the sequence:
1650 //
1651 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
1652 // '[' ']' type_specifier
1653 //
1654 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1655 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1656 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1657 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1658 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1659 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1660 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1661 ;
1662
1663cfa_function_return: // CFA
1664 '[' push cfa_parameter_list pop ']'
1665 { $$ = DeclarationNode::newTuple( $3 ); }
1666 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1667 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
1668 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1669 ;
1670
1671cfa_typedef_declaration: // CFA
1672 TYPEDEF cfa_variable_specifier
1673 {
1674 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "1" );
1675 $$ = $2->addTypedef();
1676 }
1677 | TYPEDEF cfa_function_specifier
1678 {
1679 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "2" );
1680 $$ = $2->addTypedef();
1681 }
1682 | cfa_typedef_declaration pop ',' push identifier
1683 {
1684 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "3" );
1685 $$ = $1->appendList( $1->cloneType( $5 ) );
1686 }
1687 ;
1688
1689// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1690// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1691
1692typedef_declaration:
1693 TYPEDEF type_specifier declarator
1694 {
1695 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "4" );
1696 $$ = $3->addType( $2 )->addTypedef();
1697 }
1698 | typedef_declaration pop ',' push declarator
1699 {
1700 typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname, "5" );
1701 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1702 }
1703 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1704 {
1705 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "6" );
1706 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1707 }
1708 | type_specifier TYPEDEF declarator
1709 {
1710 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "7" );
1711 $$ = $3->addType( $1 )->addTypedef();
1712 }
1713 | type_specifier TYPEDEF type_qualifier_list declarator
1714 {
1715 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "8" );
1716 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1717 }
1718 ;
1719
1720typedef_expression:
1721 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1722 TYPEDEF identifier '=' assignment_expression
1723 {
1724 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1725 }
1726 | typedef_expression pop ',' push identifier '=' assignment_expression
1727 {
1728 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1729 }
1730 ;
1731
1732c_declaration:
1733 declaration_specifier declaring_list
1734 { $$ = distAttr( $1, $2 ); }
1735 | typedef_declaration
1736 | typedef_expression // deprecated GCC, naming expression type
1737 | sue_declaration_specifier
1738 ;
1739
1740declaring_list:
1741 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1742 // storage-class
1743 declarator asm_name_opt initializer_opt
1744 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
1745 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1746 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
1747 ;
1748
1749declaration_specifier: // type specifier + storage class
1750 basic_declaration_specifier
1751 | sue_declaration_specifier
1752 | type_declaration_specifier
1753 ;
1754
1755declaration_specifier_nobody: // type specifier + storage class - {...}
1756 // Preclude SUE declarations in restricted scopes:
1757 //
1758 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1759 //
1760 // because it is impossible to call f due to name equivalence.
1761 basic_declaration_specifier
1762 | sue_declaration_specifier_nobody
1763 | type_declaration_specifier
1764 ;
1765
1766type_specifier: // type specifier
1767 basic_type_specifier
1768 | sue_type_specifier
1769 | type_type_specifier
1770 ;
1771
1772type_specifier_nobody: // type specifier - {...}
1773 // Preclude SUE declarations in restricted scopes:
1774 //
1775 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1776 //
1777 // because it is impossible to call f due to name equivalence.
1778 basic_type_specifier
1779 | sue_type_specifier_nobody
1780 | type_type_specifier
1781 ;
1782
1783type_qualifier_list_opt: // GCC, used in asm_statement
1784 // empty
1785 { $$ = nullptr; }
1786 | type_qualifier_list
1787 ;
1788
1789type_qualifier_list:
1790 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1791 //
1792 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1793 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1794 // appeared only once.
1795 type_qualifier
1796 | type_qualifier_list type_qualifier
1797 { $$ = $1->addQualifiers( $2 ); }
1798 ;
1799
1800type_qualifier:
1801 type_qualifier_name
1802 | attribute // trick handles most atrribute locations
1803 ;
1804
1805type_qualifier_name:
1806 CONST
1807 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1808 | RESTRICT
1809 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1810 | VOLATILE
1811 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1812 | ATOMIC
1813 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1814 | forall
1815 ;
1816
1817forall:
1818 FORALL '(' type_parameter_list ')' // CFA
1819 { $$ = DeclarationNode::newForall( $3 ); }
1820 ;
1821
1822declaration_qualifier_list:
1823 storage_class_list
1824 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1825 { $$ = $1->addQualifiers( $2 ); }
1826 | declaration_qualifier_list type_qualifier_list storage_class_list
1827 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1828 ;
1829
1830storage_class_list:
1831 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1832 // only one of each is specified, except for inline, which can appear with the others.
1833 //
1834 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1835 // specifiers in a declaration.
1836 storage_class
1837 | storage_class_list storage_class
1838 { $$ = $1->addQualifiers( $2 ); }
1839 ;
1840
1841storage_class:
1842 EXTERN
1843 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1844 | STATIC
1845 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
1846 | AUTO
1847 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1848 | REGISTER
1849 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
1850 | THREADLOCAL // C11
1851 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1852 // Put function specifiers here to simplify parsing rules, but separate them semantically.
1853 | INLINE // C99
1854 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1855 | FORTRAN // C99
1856 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1857 | NORETURN // C11
1858 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1859 ;
1860
1861basic_type_name:
1862 VOID
1863 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1864 | BOOL // C99
1865 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1866 | CHAR
1867 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1868 | INT
1869 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1870 | INT128
1871 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1872 | UINT128
1873 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ); }
1874 | FLOAT
1875 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1876 | DOUBLE
1877 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1878 | uuFLOAT80
1879 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat80 ); }
1880 | uuFLOAT128
1881 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat128 ); }
1882 | uFLOAT16
1883 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat16 ); }
1884 | uFLOAT32
1885 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32 ); }
1886 | uFLOAT32X
1887 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32x ); }
1888 | uFLOAT64
1889 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64 ); }
1890 | uFLOAT64X
1891 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64x ); }
1892 | uFLOAT128
1893 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
1894 | DECIMAL32
1895 { SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
1896 | DECIMAL64
1897 { SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
1898 | DECIMAL128
1899 { SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
1900 | COMPLEX // C99
1901 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1902 | IMAGINARY // C99
1903 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1904 | SIGNED
1905 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1906 | UNSIGNED
1907 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1908 | SHORT
1909 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1910 | LONG
1911 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1912 | VALIST // GCC, __builtin_va_list
1913 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1914 | AUTO_TYPE
1915 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::AutoType ); }
1916 | vtable
1917 ;
1918
1919vtable_opt:
1920 // empty
1921 { $$ = nullptr; }
1922 | vtable;
1923 ;
1924
1925vtable:
1926 VTABLE '(' type_list ')' default_opt
1927 { SemanticError( yylloc, "vtable is currently unimplemented." ); $$ = nullptr; }
1928 ;
1929
1930default_opt:
1931 // empty
1932 { $$ = nullptr; }
1933 | DEFAULT
1934 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
1935 ;
1936
1937basic_declaration_specifier:
1938 // A semantic check is necessary for conflicting storage classes.
1939 basic_type_specifier
1940 | declaration_qualifier_list basic_type_specifier
1941 { $$ = $2->addQualifiers( $1 ); }
1942 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1943 { $$ = $1->addQualifiers( $2 ); }
1944 | basic_declaration_specifier storage_class type_qualifier_list
1945 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1946 | basic_declaration_specifier storage_class basic_type_specifier
1947 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1948 ;
1949
1950basic_type_specifier:
1951 direct_type
1952 // Cannot have type modifiers, e.g., short, long, etc.
1953 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
1954 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1955 ;
1956
1957direct_type:
1958 basic_type_name
1959 | type_qualifier_list basic_type_name
1960 { $$ = $2->addQualifiers( $1 ); }
1961 | direct_type type_qualifier
1962 { $$ = $1->addQualifiers( $2 ); }
1963 | direct_type basic_type_name
1964 { $$ = $1->addType( $2 ); }
1965 ;
1966
1967indirect_type:
1968 TYPEOF '(' type ')' // GCC: typeof( x ) y;
1969 { $$ = $3; }
1970 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
1971 { $$ = DeclarationNode::newTypeof( $3 ); }
1972 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
1973 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ), true ); }
1974 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
1975 { $$ = DeclarationNode::newTypeof( $3, true ); }
1976 | ZERO_T // CFA
1977 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1978 | ONE_T // CFA
1979 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1980 ;
1981
1982sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1983 sue_type_specifier
1984 | declaration_qualifier_list sue_type_specifier
1985 { $$ = $2->addQualifiers( $1 ); }
1986 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1987 { $$ = $1->addQualifiers( $2 ); }
1988 | sue_declaration_specifier storage_class type_qualifier_list
1989 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1990 ;
1991
1992sue_type_specifier: // struct, union, enum + type specifier
1993 elaborated_type
1994 | type_qualifier_list
1995 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1996 elaborated_type
1997 { $$ = $3->addQualifiers( $1 ); }
1998 | sue_type_specifier type_qualifier
1999 {
2000 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
2001 $$ = $1->addQualifiers( $2 );
2002 }
2003 ;
2004
2005sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
2006 sue_type_specifier_nobody
2007 | declaration_qualifier_list sue_type_specifier_nobody
2008 { $$ = $2->addQualifiers( $1 ); }
2009 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
2010 { $$ = $1->addQualifiers( $2 ); }
2011 | sue_declaration_specifier_nobody storage_class type_qualifier_list
2012 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2013 ;
2014
2015sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2016 elaborated_type_nobody
2017 | type_qualifier_list elaborated_type_nobody
2018 { $$ = $2->addQualifiers( $1 ); }
2019 | sue_type_specifier_nobody type_qualifier
2020 { $$ = $1->addQualifiers( $2 ); }
2021 ;
2022
2023type_declaration_specifier:
2024 type_type_specifier
2025 | declaration_qualifier_list type_type_specifier
2026 { $$ = $2->addQualifiers( $1 ); }
2027 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2028 { $$ = $1->addQualifiers( $2 ); }
2029 | type_declaration_specifier storage_class type_qualifier_list
2030 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2031 ;
2032
2033type_type_specifier: // typedef types
2034 type_name
2035 | type_qualifier_list type_name
2036 { $$ = $2->addQualifiers( $1 ); }
2037 | type_type_specifier type_qualifier
2038 { $$ = $1->addQualifiers( $2 ); }
2039 ;
2040
2041type_name:
2042 TYPEDEFname
2043 { $$ = DeclarationNode::newFromTypedef( $1 ); }
2044 | '.' TYPEDEFname
2045 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), DeclarationNode::newFromTypedef( $2 ) ); }
2046 | type_name '.' TYPEDEFname
2047 { $$ = DeclarationNode::newQualifiedType( $1, DeclarationNode::newFromTypedef( $3 ) ); }
2048 | typegen_name
2049 | '.' typegen_name
2050 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), $2 ); }
2051 | type_name '.' typegen_name
2052 { $$ = DeclarationNode::newQualifiedType( $1, $3 ); }
2053 ;
2054
2055typegen_name: // CFA
2056 TYPEGENname
2057 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2058 | TYPEGENname '(' ')'
2059 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2060 | TYPEGENname '(' type_list ')'
2061 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
2062 ;
2063
2064elaborated_type: // struct, union, enum
2065 aggregate_type
2066 | enum_type
2067 ;
2068
2069elaborated_type_nobody: // struct, union, enum - {...}
2070 aggregate_type_nobody
2071 | enum_type_nobody
2072 ;
2073
2074aggregate_type: // struct, union
2075 aggregate_key attribute_list_opt
2076 { forall = false; } // reset
2077 '{' field_declaration_list_opt '}' type_parameters_opt
2078 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2079 | aggregate_key attribute_list_opt identifier
2080 {
2081 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2082 forall = false; // reset
2083 }
2084 '{' field_declaration_list_opt '}' type_parameters_opt
2085 { $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 ); }
2086 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2087 {
2088 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2089 forall = false; // reset
2090 }
2091 '{' field_declaration_list_opt '}' type_parameters_opt
2092 {
2093 DeclarationNode::newFromTypedef( $3 );
2094 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2095 }
2096 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2097 {
2098 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2099 forall = false; // reset
2100 }
2101 '{' field_declaration_list_opt '}' type_parameters_opt
2102 {
2103 DeclarationNode::newFromTypeGen( $3, nullptr );
2104 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2105 }
2106 | aggregate_type_nobody
2107 ;
2108
2109type_parameters_opt:
2110 // empty
2111 { $$ = nullptr; } %prec '}'
2112 | '(' type_list ')'
2113 { $$ = $2; }
2114 ;
2115
2116aggregate_type_nobody: // struct, union - {...}
2117 aggregate_key attribute_list_opt identifier
2118 {
2119 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname );
2120 forall = false; // reset
2121 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2122 }
2123 | aggregate_key attribute_list_opt type_name
2124 {
2125 forall = false; // reset
2126 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2127 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2128 // delete newFromTypeGen.
2129 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2130 $3->type->symbolic.name = nullptr;
2131 $3->type->symbolic.actuals = nullptr;
2132 delete $3;
2133 }
2134 ;
2135
2136aggregate_key:
2137 aggregate_data
2138 | aggregate_control
2139 ;
2140
2141aggregate_data:
2142 STRUCT vtable_opt
2143 { $$ = AggregateDecl::Struct; }
2144 | UNION
2145 { $$ = AggregateDecl::Union; }
2146 | EXCEPTION // CFA
2147 { $$ = AggregateDecl::Exception; }
2148 // { SemanticError( yylloc, "exception aggregate is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2149 ;
2150
2151aggregate_control: // CFA
2152 MONITOR
2153 { $$ = AggregateDecl::Monitor; }
2154 | MUTEX STRUCT
2155 { $$ = AggregateDecl::Monitor; }
2156 | GENERATOR
2157 { $$ = AggregateDecl::Generator; }
2158 | MUTEX GENERATOR
2159 { SemanticError( yylloc, "monitor generator is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2160 | COROUTINE
2161 { $$ = AggregateDecl::Coroutine; }
2162 | MUTEX COROUTINE
2163 { SemanticError( yylloc, "monitor coroutine is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2164 | THREAD
2165 { $$ = AggregateDecl::Thread; }
2166 | MUTEX THREAD
2167 { SemanticError( yylloc, "monitor thread is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2168 ;
2169
2170field_declaration_list_opt:
2171 // empty
2172 { $$ = nullptr; }
2173 | field_declaration_list_opt field_declaration
2174 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2175 ;
2176
2177field_declaration:
2178 type_specifier field_declaring_list_opt ';'
2179 { $$ = fieldDecl( $1, $2 ); }
2180 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2181 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2182 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2183 {
2184 if ( ! $3 ) { // field declarator ?
2185 $3 = DeclarationNode::newName( nullptr );
2186 } // if
2187 $3->inLine = true;
2188 $$ = distAttr( $2, $3 ); // mark all fields in list
2189 distInl( $3 );
2190 }
2191 | INLINE aggregate_control ';' // CFA
2192 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2193 | typedef_declaration ';' // CFA
2194 | cfa_field_declaring_list ';' // CFA, new style field declaration
2195 | EXTENSION cfa_field_declaring_list ';' // GCC
2196 { distExt( $2 ); $$ = $2; } // mark all fields in list
2197 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2198 { $$ = $2; } // mark all fields in list
2199 | cfa_typedef_declaration ';' // CFA
2200 | static_assert // C11
2201 ;
2202
2203field_declaring_list_opt:
2204 // empty
2205 { $$ = nullptr; }
2206 | field_declarator
2207 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2208 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2209 ;
2210
2211field_declarator:
2212 bit_subrange_size // C special case, no field name
2213 { $$ = DeclarationNode::newBitfield( $1 ); }
2214 | variable_declarator bit_subrange_size_opt
2215 // A semantic check is required to ensure bit_subrange only appears on integral types.
2216 { $$ = $1->addBitfield( $2 ); }
2217 | variable_type_redeclarator bit_subrange_size_opt
2218 // A semantic check is required to ensure bit_subrange only appears on integral types.
2219 { $$ = $1->addBitfield( $2 ); }
2220 ;
2221
2222field_abstract_list_opt:
2223 // empty
2224 { $$ = nullptr; }
2225 | field_abstract
2226 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2227 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2228 ;
2229
2230field_abstract:
2231 // no bit fields
2232 variable_abstract_declarator
2233 ;
2234
2235cfa_field_declaring_list: // CFA, new style field declaration
2236 // bit-fields are handled by C declarations
2237 cfa_abstract_declarator_tuple identifier_or_type_name
2238 { $$ = $1->addName( $2 ); }
2239 | cfa_field_declaring_list ',' identifier_or_type_name
2240 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
2241 ;
2242
2243cfa_field_abstract_list: // CFA, new style field declaration
2244 // bit-fields are handled by C declarations
2245 cfa_abstract_declarator_tuple
2246 | cfa_field_abstract_list ','
2247 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
2248 ;
2249
2250bit_subrange_size_opt:
2251 // empty
2252 { $$ = nullptr; }
2253 | bit_subrange_size
2254 ;
2255
2256bit_subrange_size:
2257 ':' assignment_expression
2258 { $$ = $2; }
2259 ;
2260
2261enum_type: // enum
2262 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
2263 { $$ = DeclarationNode::newEnum( nullptr, $4, true )->addQualifiers( $2 ); }
2264 | ENUM attribute_list_opt identifier
2265 { typedefTable.makeTypedef( *$3 ); }
2266 '{' enumerator_list comma_opt '}'
2267 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
2268 | ENUM attribute_list_opt typedef_name // unqualified type name
2269 '{' enumerator_list comma_opt '}'
2270 { $$ = DeclarationNode::newEnum( $3->name, $5, true )->addQualifiers( $2 ); }
2271 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2272 {
2273 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 ) { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2274 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2275 }
2276 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt identifier attribute_list_opt
2277 {
2278 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 ) { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2279 typedefTable.makeTypedef( *$6 );
2280 }
2281 '{' enumerator_list comma_opt '}'
2282 {
2283 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2284 }
2285 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt typedef_name attribute_list_opt '{' enumerator_list comma_opt '}'
2286 {
2287 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 ) { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2288 typedefTable.makeTypedef( *$6->name );
2289 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2290 }
2291 | enum_type_nobody
2292 ;
2293
2294enum_type_nobody: // enum - {...}
2295 ENUM attribute_list_opt identifier
2296 { typedefTable.makeTypedef( *$3 ); $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 ); }
2297 | ENUM attribute_list_opt type_name // qualified type name
2298 { typedefTable.makeTypedef( *$3->type->symbolic.name ); $$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false )->addQualifiers( $2 ); }
2299 ;
2300
2301enumerator_list:
2302 identifier_or_type_name enumerator_value_opt
2303 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
2304 | INLINE type_name
2305 { $$ = DeclarationNode::newEnumConstant( new string("inline"), nullptr ); }
2306 | enumerator_list ',' identifier_or_type_name enumerator_value_opt
2307 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
2308 | enumerator_list ',' INLINE type_name enumerator_value_opt
2309 { $$ = $1->appendList( DeclarationNode::newEnumConstant( new string("inline"), nullptr ) ); }
2310 ;
2311
2312enumerator_value_opt:
2313 // empty
2314 { $$ = nullptr; }
2315 // | '=' constant_expression
2316 // { $$ = $2; }
2317 | simple_assignment_operator initializer
2318 { $$ = $2->get_expression(); } // FIX ME: enum only deals with constant_expression
2319 ;
2320
2321cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
2322 // empty
2323 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2324 | ELLIPSIS
2325 { $$ = nullptr; }
2326 | cfa_abstract_parameter_list
2327 | cfa_parameter_list
2328 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2329 { $$ = $1->appendList( $5 ); }
2330 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2331 { $$ = $1->addVarArgs(); }
2332 | cfa_parameter_list pop ',' push ELLIPSIS
2333 { $$ = $1->addVarArgs(); }
2334 ;
2335
2336cfa_parameter_list: // CFA
2337 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2338 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2339 cfa_parameter_declaration
2340 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2341 { $$ = $1->appendList( $5 ); }
2342 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2343 { $$ = $1->appendList( $5 ); }
2344 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2345 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2346 ;
2347
2348cfa_abstract_parameter_list: // CFA, new & old style abstract
2349 cfa_abstract_parameter_declaration
2350 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2351 { $$ = $1->appendList( $5 ); }
2352 ;
2353
2354parameter_type_list_opt:
2355 // empty
2356 { $$ = nullptr; }
2357 | ELLIPSIS
2358 { $$ = nullptr; }
2359 | parameter_list
2360 | parameter_list pop ',' push ELLIPSIS
2361 { $$ = $1->addVarArgs(); }
2362 ;
2363
2364parameter_list: // abstract + real
2365 abstract_parameter_declaration
2366 | parameter_declaration
2367 | parameter_list pop ',' push abstract_parameter_declaration
2368 { $$ = $1->appendList( $5 ); }
2369 | parameter_list pop ',' push parameter_declaration
2370 { $$ = $1->appendList( $5 ); }
2371 ;
2372
2373// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2374// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2375
2376cfa_parameter_declaration: // CFA, new & old style parameter declaration
2377 parameter_declaration
2378 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2379 { $$ = $1->addName( $2 ); }
2380 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2381 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2382 { $$ = $1->addName( $2 ); }
2383 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2384 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2385 | cfa_function_specifier
2386 ;
2387
2388cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2389 abstract_parameter_declaration
2390 | cfa_identifier_parameter_declarator_no_tuple
2391 | cfa_abstract_tuple
2392 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2393 | type_qualifier_list cfa_abstract_tuple
2394 { $$ = $2->addQualifiers( $1 ); }
2395 | cfa_abstract_function
2396 ;
2397
2398parameter_declaration:
2399 // No SUE declaration in parameter list.
2400 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2401 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2402 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2403 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2404 ;
2405
2406abstract_parameter_declaration:
2407 declaration_specifier_nobody default_initializer_opt
2408 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2409 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2410 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2411 ;
2412
2413// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2414// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2415// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2416
2417identifier_list: // K&R-style parameter list => no types
2418 identifier
2419 { $$ = DeclarationNode::newName( $1 ); }
2420 | identifier_list ',' identifier
2421 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2422 ;
2423
2424identifier_or_type_name:
2425 identifier
2426 | TYPEDEFname
2427 | TYPEGENname
2428 ;
2429
2430type_no_function: // sizeof, alignof, cast (constructor)
2431 cfa_abstract_declarator_tuple // CFA
2432 | type_specifier
2433 | type_specifier abstract_declarator
2434 { $$ = $2->addType( $1 ); }
2435 ;
2436
2437type: // typeof, assertion
2438 type_no_function
2439 | cfa_abstract_function // CFA
2440 ;
2441
2442initializer_opt:
2443 // empty
2444 { $$ = nullptr; }
2445 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2446 | '=' VOID { $$ = new InitializerNode( true ); }
2447 ;
2448
2449initializer:
2450 assignment_expression { $$ = new InitializerNode( $1 ); }
2451 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2452 ;
2453
2454initializer_list_opt:
2455 // empty
2456 { $$ = nullptr; }
2457 | initializer
2458 | designation initializer { $$ = $2->set_designators( $1 ); }
2459 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2460 | initializer_list_opt ',' designation initializer
2461 { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2462 ;
2463
2464// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2465// '=' to separator the designator from the initializer value, as in:
2466//
2467// int x[10] = { [1] = 3 };
2468//
2469// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2470// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2471// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2472// shift/reduce conflicts
2473
2474designation:
2475 designator_list ':' // C99, CFA uses ":" instead of "="
2476 | identifier ':' // GCC, field name
2477 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2478 ;
2479
2480designator_list: // C99
2481 designator
2482 | designator_list designator
2483 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
2484 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2485 ;
2486
2487designator:
2488 '.' identifier // C99, field name
2489 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2490 | '[' push assignment_expression pop ']' // C99, single array element
2491 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2492 { $$ = $3; }
2493 | '[' push subrange pop ']' // CFA, multiple array elements
2494 { $$ = $3; }
2495 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2496 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $3 ), maybeMoveBuild<Expression>( $5 ) ) ); }
2497 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
2498 { $$ = $4; }
2499 ;
2500
2501// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2502// rather than an object-oriented type system. This required four groups of extensions:
2503//
2504// Overloading: function, data, and operator identifiers may be overloaded.
2505//
2506// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2507// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2508// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2509//
2510// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2511// site. A polymorphic function is not a template; it is a function, with an address and a type.
2512//
2513// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2514// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2515// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2516// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2517// on type arguments of polymorphic functions.
2518
2519type_parameter_list: // CFA
2520 type_parameter
2521 | type_parameter_list ',' type_parameter
2522 { $$ = $1->appendList( $3 ); }
2523 ;
2524
2525type_initializer_opt: // CFA
2526 // empty
2527 { $$ = nullptr; }
2528 | '=' type
2529 { $$ = $2; }
2530 ;
2531
2532type_parameter: // CFA
2533 type_class identifier_or_type_name
2534 {
2535 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2536 if ( $1 == TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
2537 if ( $1 == TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
2538 if ( $1 == TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
2539 }
2540 type_initializer_opt assertion_list_opt
2541 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2542 | identifier_or_type_name new_type_class
2543 { typedefTable.addToScope( *$1, TYPEDEFname, "9" ); }
2544 type_initializer_opt assertion_list_opt
2545 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2546 | '[' identifier_or_type_name ']'
2547 {
2548 typedefTable.addToScope( *$2, TYPEDIMname, "9" );
2549 $$ = DeclarationNode::newTypeParam( TypeDecl::Dimension, $2 );
2550 }
2551 // | type_specifier identifier_parameter_declarator
2552 | assertion_list
2553 { $$ = DeclarationNode::newTypeParam( TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
2554 ;
2555
2556new_type_class: // CFA
2557 // empty
2558 { $$ = TypeDecl::Otype; }
2559 | '&'
2560 { $$ = TypeDecl::Dtype; }
2561 | '*'
2562 { $$ = TypeDecl::DStype; } // dtype + sized
2563 | ELLIPSIS
2564 { $$ = TypeDecl::Ttype; }
2565 ;
2566
2567type_class: // CFA
2568 OTYPE
2569 { $$ = TypeDecl::Otype; }
2570 | DTYPE
2571 { $$ = TypeDecl::Dtype; }
2572 | FTYPE
2573 { $$ = TypeDecl::Ftype; }
2574 | TTYPE
2575 { $$ = TypeDecl::Ttype; }
2576 ;
2577
2578assertion_list_opt: // CFA
2579 // empty
2580 { $$ = nullptr; }
2581 | assertion_list
2582 ;
2583
2584assertion_list: // CFA
2585 assertion
2586 | assertion_list assertion
2587 { $$ = $1->appendList( $2 ); }
2588 ;
2589
2590assertion: // CFA
2591 '|' identifier_or_type_name '(' type_list ')'
2592 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
2593 | '|' '{' push trait_declaration_list pop '}'
2594 { $$ = $4; }
2595 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
2596 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
2597 ;
2598
2599type_list: // CFA
2600 type
2601 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2602 | assignment_expression
2603 | type_list ',' type
2604 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) )); }
2605 | type_list ',' assignment_expression
2606 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2607 ;
2608
2609type_declaring_list: // CFA
2610 OTYPE type_declarator
2611 { $$ = $2; }
2612 | storage_class_list OTYPE type_declarator
2613 { $$ = $3->addQualifiers( $1 ); }
2614 | type_declaring_list ',' type_declarator
2615 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2616 ;
2617
2618type_declarator: // CFA
2619 type_declarator_name assertion_list_opt
2620 { $$ = $1->addAssertions( $2 ); }
2621 | type_declarator_name assertion_list_opt '=' type
2622 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2623 ;
2624
2625type_declarator_name: // CFA
2626 identifier_or_type_name
2627 {
2628 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
2629 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2630 }
2631 | identifier_or_type_name '(' type_parameter_list ')'
2632 {
2633 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "11" );
2634 $$ = DeclarationNode::newTypeDecl( $1, $3 );
2635 }
2636 ;
2637
2638trait_specifier: // CFA
2639 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
2640 { $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
2641 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
2642 { $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
2643 ;
2644
2645trait_declaration_list: // CFA
2646 trait_declaration
2647 | trait_declaration_list pop push trait_declaration
2648 { $$ = $1->appendList( $4 ); }
2649 ;
2650
2651trait_declaration: // CFA
2652 cfa_trait_declaring_list ';'
2653 | trait_declaring_list ';'
2654 ;
2655
2656cfa_trait_declaring_list: // CFA
2657 cfa_variable_specifier
2658 | cfa_function_specifier
2659 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2660 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
2661 ;
2662
2663trait_declaring_list: // CFA
2664 type_specifier declarator
2665 { $$ = $2->addType( $1 ); }
2666 | trait_declaring_list pop ',' push declarator
2667 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
2668 ;
2669
2670//***************************** EXTERNAL DEFINITIONS *****************************
2671
2672translation_unit:
2673 // empty, input file
2674 | external_definition_list
2675 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2676 ;
2677
2678external_definition_list:
2679 push external_definition pop
2680 { $$ = $2; }
2681 | external_definition_list push external_definition pop
2682 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2683 ;
2684
2685external_definition_list_opt:
2686 // empty
2687 { $$ = nullptr; }
2688 | external_definition_list
2689 ;
2690
2691up:
2692 { typedefTable.up( forall ); forall = false; }
2693 ;
2694
2695down:
2696 { typedefTable.down(); }
2697 ;
2698
2699external_definition:
2700 DIRECTIVE
2701 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( $1 ) ) ); }
2702 | declaration
2703 | external_function_definition
2704 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2705 {
2706 distExt( $2 ); // mark all fields in list
2707 $$ = $2;
2708 }
2709 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2710 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) ); }
2711 | EXTERN STRINGliteral // C++-style linkage specifier
2712 {
2713 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2714 linkage = LinkageSpec::update( yylloc, linkage, $2 );
2715 }
2716 '{' up external_definition_list_opt down '}'
2717 {
2718 linkage = linkageStack.top();
2719 linkageStack.pop();
2720 $$ = $6;
2721 }
2722 | type_qualifier_list
2723 {
2724 if ( $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2725 if ( $1->type->forall ) forall = true; // remember generic type
2726 }
2727 '{' up external_definition_list_opt down '}' // CFA, namespace
2728 {
2729 distQual( $5, $1 );
2730 forall = false;
2731 $$ = $5;
2732 }
2733 | declaration_qualifier_list
2734 {
2735 if ( $1->type && $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2736 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
2737 }
2738 '{' up external_definition_list_opt down '}' // CFA, namespace
2739 {
2740 distQual( $5, $1 );
2741 forall = false;
2742 $$ = $5;
2743 }
2744 | declaration_qualifier_list type_qualifier_list
2745 {
2746 if ( ($1->type && $1->type->qualifiers.val) || $2->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2747 if ( ($1->type && $1->type->forall) || $2->type->forall ) forall = true; // remember generic type
2748 }
2749 '{' up external_definition_list_opt down '}' // CFA, namespace
2750 {
2751 distQual( $6, $1->addQualifiers( $2 ) );
2752 forall = false;
2753 $$ = $6;
2754 }
2755 ;
2756
2757external_function_definition:
2758 function_definition
2759 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2760 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2761 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2762 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2763 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2764 | function_declarator compound_statement
2765 { $$ = $1->addFunctionBody( $2 ); }
2766 | KR_function_declarator KR_parameter_list_opt compound_statement
2767 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
2768 ;
2769
2770with_clause_opt:
2771 // empty
2772 { $$ = nullptr; forall = false; }
2773 | WITH '(' tuple_expression_list ')'
2774 { $$ = $3; forall = false; }
2775 ;
2776
2777function_definition:
2778 cfa_function_declaration with_clause_opt compound_statement // CFA
2779 {
2780 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2781 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
2782 $1->get_last()->addFunctionBody( $3, $2 );
2783 $$ = $1;
2784 }
2785 | declaration_specifier function_declarator with_clause_opt compound_statement
2786 {
2787 rebindForall( $1, $2 );
2788 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2789 }
2790 | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement
2791 {
2792 rebindForall( $1, $2 );
2793 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2794 }
2795 // handles default int return type, OBSOLESCENT (see 1)
2796 | type_qualifier_list function_declarator with_clause_opt compound_statement
2797 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2798 // handles default int return type, OBSOLESCENT (see 1)
2799 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
2800 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2801 // handles default int return type, OBSOLESCENT (see 1)
2802 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2803 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2804
2805 // Old-style K&R function definition, OBSOLESCENT (see 4)
2806 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2807 {
2808 rebindForall( $1, $2 );
2809 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
2810 }
2811 // handles default int return type, OBSOLESCENT (see 1)
2812 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2813 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2814 // handles default int return type, OBSOLESCENT (see 1)
2815 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2816 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2817 // handles default int return type, OBSOLESCENT (see 1)
2818 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2819 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2820 ;
2821
2822declarator:
2823 variable_declarator
2824 | variable_type_redeclarator
2825 | function_declarator
2826 ;
2827
2828subrange:
2829 constant_expression '~' constant_expression // CFA, integer subrange
2830 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
2831 ;
2832
2833asm_name_opt: // GCC
2834 // empty
2835 { $$ = nullptr; }
2836 | ASM '(' string_literal ')' attribute_list_opt
2837 {
2838 DeclarationNode * name = new DeclarationNode();
2839 name->asmName = $3;
2840 $$ = name->addQualifiers( $5 );
2841 }
2842 ;
2843
2844attribute_list_opt: // GCC
2845 // empty
2846 { $$ = nullptr; }
2847 | attribute_list
2848 ;
2849
2850attribute_list: // GCC
2851 attribute
2852 | attribute_list attribute
2853 { $$ = $2->addQualifiers( $1 ); }
2854 ;
2855
2856attribute: // GCC
2857 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2858 { $$ = $4; }
2859 ;
2860
2861attribute_name_list: // GCC
2862 attribute_name
2863 | attribute_name_list ',' attribute_name
2864 { $$ = $3->addQualifiers( $1 ); }
2865 ;
2866
2867attribute_name: // GCC
2868 // empty
2869 { $$ = nullptr; }
2870 | attr_name
2871 { $$ = DeclarationNode::newAttribute( $1 ); }
2872 | attr_name '(' argument_expression_list_opt ')'
2873 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
2874 ;
2875
2876attr_name: // GCC
2877 IDENTIFIER
2878 | quasi_keyword
2879 | TYPEDEFname
2880 | TYPEGENname
2881 | FALLTHROUGH
2882 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
2883 | CONST
2884 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2885 ;
2886
2887// ============================================================================
2888// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2889// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2890// in:
2891//
2892// int (*f())[10] { ... };
2893// ... (*f())[3] += 1; // definition mimics usage
2894//
2895// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2896// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2897// ============================================================================
2898
2899// ----------------------------------------------------------------------------
2900// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2901// to define a variable or function prototype, e.g.:
2902//
2903// valid declaration invalid definition
2904// ----------------- ------------------
2905// int f; int f {}
2906// int *f; int *f {}
2907// int f[10]; int f[10] {}
2908// int (*f)(int); int (*f)(int) {}
2909//
2910// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2911// variable_declarator and function_declarator.
2912// ----------------------------------------------------------------------------
2913
2914// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2915// declaring an array of functions versus a pointer to an array of functions.
2916
2917paren_identifier:
2918 identifier
2919 { $$ = DeclarationNode::newName( $1 ); }
2920 | '(' paren_identifier ')' // redundant parenthesis
2921 { $$ = $2; }
2922 ;
2923
2924variable_declarator:
2925 paren_identifier attribute_list_opt
2926 { $$ = $1->addQualifiers( $2 ); }
2927 | variable_ptr
2928 | variable_array attribute_list_opt
2929 { $$ = $1->addQualifiers( $2 ); }
2930 | variable_function attribute_list_opt
2931 { $$ = $1->addQualifiers( $2 ); }
2932 ;
2933
2934variable_ptr:
2935 ptrref_operator variable_declarator
2936 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2937 | ptrref_operator type_qualifier_list variable_declarator
2938 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2939 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
2940 { $$ = $2->addQualifiers( $4 ); }
2941 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
2942 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
2943 ;
2944
2945variable_array:
2946 paren_identifier array_dimension
2947 { $$ = $1->addArray( $2 ); }
2948 | '(' variable_ptr ')' array_dimension
2949 { $$ = $2->addArray( $4 ); }
2950 | '(' attribute_list variable_ptr ')' array_dimension
2951 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
2952 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2953 { $$ = $2->addArray( $4 ); }
2954 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
2955 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
2956 | '(' variable_array ')' // redundant parenthesis
2957 { $$ = $2; }
2958 | '(' attribute_list variable_array ')' // redundant parenthesis
2959 { $$ = $3->addQualifiers( $2 ); }
2960 ;
2961
2962variable_function:
2963 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2964 { $$ = $2->addParamList( $6 ); }
2965 | '(' attribute_list variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2966 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
2967 | '(' variable_function ')' // redundant parenthesis
2968 { $$ = $2; }
2969 | '(' attribute_list variable_function ')' // redundant parenthesis
2970 { $$ = $3->addQualifiers( $2 ); }
2971 ;
2972
2973// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2974// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2975// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2976
2977function_declarator:
2978 function_no_ptr attribute_list_opt
2979 { $$ = $1->addQualifiers( $2 ); }
2980 | function_ptr
2981 | function_array attribute_list_opt
2982 { $$ = $1->addQualifiers( $2 ); }
2983 ;
2984
2985function_no_ptr:
2986 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2987 { $$ = $1->addParamList( $4 ); }
2988 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2989 { $$ = $2->addParamList( $6 ); }
2990 | '(' attribute_list function_ptr ')' '(' push parameter_type_list_opt pop ')'
2991 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
2992 | '(' function_no_ptr ')' // redundant parenthesis
2993 { $$ = $2; }
2994 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
2995 { $$ = $3->addQualifiers( $2 ); }
2996 ;
2997
2998function_ptr:
2999 ptrref_operator function_declarator
3000 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3001 | ptrref_operator type_qualifier_list function_declarator
3002 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3003 | '(' function_ptr ')' attribute_list_opt
3004 { $$ = $2->addQualifiers( $4 ); }
3005 | '(' attribute_list function_ptr ')' attribute_list_opt
3006 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3007 ;
3008
3009function_array:
3010 '(' function_ptr ')' array_dimension
3011 { $$ = $2->addArray( $4 ); }
3012 | '(' attribute_list function_ptr ')' array_dimension
3013 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3014 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3015 { $$ = $2->addArray( $4 ); }
3016 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3017 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3018 | '(' function_array ')' // redundant parenthesis
3019 { $$ = $2; }
3020 | '(' attribute_list function_array ')' // redundant parenthesis
3021 { $$ = $3->addQualifiers( $2 ); }
3022 ;
3023
3024// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3025//
3026// f( a, b, c ) int a, *b, c[]; {}
3027//
3028// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3029// returning arrays and functions versus pointers to arrays and functions.
3030
3031KR_function_declarator:
3032 KR_function_no_ptr
3033 | KR_function_ptr
3034 | KR_function_array
3035 ;
3036
3037KR_function_no_ptr:
3038 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3039 { $$ = $1->addIdList( $3 ); }
3040 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3041 { $$ = $2->addParamList( $6 ); }
3042 | '(' attribute_list KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3043 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3044 | '(' KR_function_no_ptr ')' // redundant parenthesis
3045 { $$ = $2; }
3046 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3047 { $$ = $3->addQualifiers( $2 ); }
3048 ;
3049
3050KR_function_ptr:
3051 ptrref_operator KR_function_declarator
3052 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3053 | ptrref_operator type_qualifier_list KR_function_declarator
3054 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3055 | '(' KR_function_ptr ')'
3056 { $$ = $2; }
3057 | '(' attribute_list KR_function_ptr ')'
3058 { $$ = $3->addQualifiers( $2 ); }
3059 ;
3060
3061KR_function_array:
3062 '(' KR_function_ptr ')' array_dimension
3063 { $$ = $2->addArray( $4 ); }
3064 | '(' attribute_list KR_function_ptr ')' array_dimension
3065 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3066 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3067 { $$ = $2->addArray( $4 ); }
3068 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3069 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3070 | '(' KR_function_array ')' // redundant parenthesis
3071 { $$ = $2; }
3072 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3073 { $$ = $3->addQualifiers( $2 ); }
3074 ;
3075
3076// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
3077//
3078// typedef int foo;
3079// {
3080// int foo; // redefine typedef name in new scope
3081// }
3082//
3083// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3084// and functions versus pointers to arrays and functions.
3085
3086paren_type:
3087 typedef_name
3088 {
3089 // hide type name in enclosing scope by variable name
3090 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "ID" );
3091 }
3092 | '(' paren_type ')'
3093 { $$ = $2; }
3094 ;
3095
3096variable_type_redeclarator:
3097 paren_type attribute_list_opt
3098 { $$ = $1->addQualifiers( $2 ); }
3099 | type_ptr
3100 | type_array attribute_list_opt
3101 { $$ = $1->addQualifiers( $2 ); }
3102 | type_function attribute_list_opt
3103 { $$ = $1->addQualifiers( $2 ); }
3104 ;
3105
3106type_ptr:
3107 ptrref_operator variable_type_redeclarator
3108 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3109 | ptrref_operator type_qualifier_list variable_type_redeclarator
3110 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3111 | '(' type_ptr ')' attribute_list_opt // redundant parenthesis
3112 { $$ = $2->addQualifiers( $4 ); }
3113 | '(' attribute_list type_ptr ')' attribute_list_opt // redundant parenthesis
3114 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3115 ;
3116
3117type_array:
3118 paren_type array_dimension
3119 { $$ = $1->addArray( $2 ); }
3120 | '(' type_ptr ')' array_dimension
3121 { $$ = $2->addArray( $4 ); }
3122 | '(' attribute_list type_ptr ')' array_dimension
3123 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3124 | '(' type_array ')' multi_array_dimension // redundant parenthesis
3125 { $$ = $2->addArray( $4 ); }
3126 | '(' attribute_list type_array ')' multi_array_dimension // redundant parenthesis
3127 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3128 | '(' type_array ')' // redundant parenthesis
3129 { $$ = $2; }
3130 | '(' attribute_list type_array ')' // redundant parenthesis
3131 { $$ = $3->addQualifiers( $2 ); }
3132 ;
3133
3134type_function:
3135 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3136 { $$ = $1->addParamList( $4 ); }
3137 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3138 { $$ = $2->addParamList( $6 ); }
3139 | '(' attribute_list type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3140 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3141 | '(' type_function ')' // redundant parenthesis
3142 { $$ = $2; }
3143 | '(' attribute_list type_function ')' // redundant parenthesis
3144 { $$ = $3->addQualifiers( $2 ); }
3145 ;
3146
3147// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3148// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3149// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3150// pointers to arrays and functions.
3151
3152identifier_parameter_declarator:
3153 paren_identifier attribute_list_opt
3154 { $$ = $1->addQualifiers( $2 ); }
3155 | '&' MUTEX paren_identifier attribute_list_opt
3156 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3157 | identifier_parameter_ptr
3158 | identifier_parameter_array attribute_list_opt
3159 { $$ = $1->addQualifiers( $2 ); }
3160 | identifier_parameter_function attribute_list_opt
3161 { $$ = $1->addQualifiers( $2 ); }
3162 ;
3163
3164identifier_parameter_ptr:
3165 ptrref_operator identifier_parameter_declarator
3166 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3167 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3168 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3169 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3170 { $$ = $2->addQualifiers( $4 ); }
3171 ;
3172
3173identifier_parameter_array:
3174 paren_identifier array_parameter_dimension
3175 { $$ = $1->addArray( $2 ); }
3176 | '(' identifier_parameter_ptr ')' array_dimension
3177 { $$ = $2->addArray( $4 ); }
3178 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3179 { $$ = $2->addArray( $4 ); }
3180 | '(' identifier_parameter_array ')' // redundant parenthesis
3181 { $$ = $2; }
3182 ;
3183
3184identifier_parameter_function:
3185 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3186 { $$ = $1->addParamList( $4 ); }
3187 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3188 { $$ = $2->addParamList( $6 ); }
3189 | '(' identifier_parameter_function ')' // redundant parenthesis
3190 { $$ = $2; }
3191 ;
3192
3193// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3194// e.g.:
3195//
3196// typedef int foo;
3197// forall( otype T ) struct foo;
3198// int f( int foo ); // redefine typedef name in new scope
3199//
3200// and allows the C99 array options, which can only appear in a parameter list.
3201
3202type_parameter_redeclarator:
3203 typedef_name attribute_list_opt
3204 { $$ = $1->addQualifiers( $2 ); }
3205 | '&' MUTEX typedef_name attribute_list_opt
3206 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3207 | type_parameter_ptr
3208 | type_parameter_array attribute_list_opt
3209 { $$ = $1->addQualifiers( $2 ); }
3210 | type_parameter_function attribute_list_opt
3211 { $$ = $1->addQualifiers( $2 ); }
3212 ;
3213
3214typedef_name:
3215 TYPEDEFname
3216 { $$ = DeclarationNode::newName( $1 ); }
3217 | TYPEGENname
3218 { $$ = DeclarationNode::newName( $1 ); }
3219 ;
3220
3221type_parameter_ptr:
3222 ptrref_operator type_parameter_redeclarator
3223 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3224 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3225 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3226 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3227 { $$ = $2->addQualifiers( $4 ); }
3228 ;
3229
3230type_parameter_array:
3231 typedef_name array_parameter_dimension
3232 { $$ = $1->addArray( $2 ); }
3233 | '(' type_parameter_ptr ')' array_parameter_dimension
3234 { $$ = $2->addArray( $4 ); }
3235 ;
3236
3237type_parameter_function:
3238 typedef_name '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3239 { $$ = $1->addParamList( $4 ); }
3240 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3241 { $$ = $2->addParamList( $6 ); }
3242 ;
3243
3244// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3245// which the type applies, e.g.:
3246//
3247// sizeof( int );
3248// sizeof( int * );
3249// sizeof( int [10] );
3250// sizeof( int (*)() );
3251// sizeof( int () );
3252//
3253// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3254// and functions versus pointers to arrays and functions.
3255
3256abstract_declarator:
3257 abstract_ptr
3258 | abstract_array attribute_list_opt
3259 { $$ = $1->addQualifiers( $2 ); }
3260 | abstract_function attribute_list_opt
3261 { $$ = $1->addQualifiers( $2 ); }
3262 ;
3263
3264abstract_ptr:
3265 ptrref_operator
3266 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3267 | ptrref_operator type_qualifier_list
3268 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3269 | ptrref_operator abstract_declarator
3270 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3271 | ptrref_operator type_qualifier_list abstract_declarator
3272 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3273 | '(' abstract_ptr ')' attribute_list_opt
3274 { $$ = $2->addQualifiers( $4 ); }
3275 ;
3276
3277abstract_array:
3278 array_dimension
3279 | '(' abstract_ptr ')' array_dimension
3280 { $$ = $2->addArray( $4 ); }
3281 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3282 { $$ = $2->addArray( $4 ); }
3283 | '(' abstract_array ')' // redundant parenthesis
3284 { $$ = $2; }
3285 ;
3286
3287abstract_function:
3288 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3289 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3290 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3291 { $$ = $2->addParamList( $6 ); }
3292 | '(' abstract_function ')' // redundant parenthesis
3293 { $$ = $2; }
3294 ;
3295
3296array_dimension:
3297 // Only the first dimension can be empty.
3298 '[' ']'
3299 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3300 | '[' ']' multi_array_dimension
3301 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
3302 | '[' push assignment_expression pop ',' comma_expression ']'
3303 { $$ = DeclarationNode::newArray( $3, 0, false )->addArray( DeclarationNode::newArray( $6, 0, false ) ); }
3304 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3305 | multi_array_dimension
3306 ;
3307
3308multi_array_dimension:
3309 '[' push assignment_expression pop ']'
3310 { $$ = DeclarationNode::newArray( $3, 0, false ); }
3311 | '[' push '*' pop ']' // C99
3312 { $$ = DeclarationNode::newVarArray( 0 ); }
3313 | multi_array_dimension '[' push assignment_expression pop ']'
3314 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
3315 | multi_array_dimension '[' push '*' pop ']' // C99
3316 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3317 ;
3318
3319// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3320// identifier to which the type applies, e.g.:
3321//
3322// int f( int ); // not handled here
3323// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3324// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3325// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3326//
3327// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3328// and functions versus pointers to arrays and functions. In addition, the pattern handles the
3329// special meaning of parenthesis around a typedef name:
3330//
3331// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
3332// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
3333// not as redundant parentheses around the identifier."
3334//
3335// For example:
3336//
3337// typedef float T;
3338// int f( int ( T [5] ) ); // see abstract_parameter_declarator
3339// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
3340// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
3341// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
3342//
3343// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
3344// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
3345// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
3346// functions.
3347
3348abstract_parameter_declarator:
3349 abstract_parameter_ptr
3350 | '&' MUTEX attribute_list_opt
3351 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
3352 | abstract_parameter_array attribute_list_opt
3353 { $$ = $1->addQualifiers( $2 ); }
3354 | abstract_parameter_function attribute_list_opt
3355 { $$ = $1->addQualifiers( $2 ); }
3356 ;
3357
3358abstract_parameter_ptr:
3359 ptrref_operator
3360 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3361 | ptrref_operator type_qualifier_list
3362 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3363 | ptrref_operator abstract_parameter_declarator
3364 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3365 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3366 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3367 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3368 { $$ = $2->addQualifiers( $4 ); }
3369 ;
3370
3371abstract_parameter_array:
3372 array_parameter_dimension
3373 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3374 { $$ = $2->addArray( $4 ); }
3375 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3376 { $$ = $2->addArray( $4 ); }
3377 | '(' abstract_parameter_array ')' // redundant parenthesis
3378 { $$ = $2; }
3379 ;
3380
3381abstract_parameter_function:
3382 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3383 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3384 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3385 { $$ = $2->addParamList( $6 ); }
3386 | '(' abstract_parameter_function ')' // redundant parenthesis
3387 { $$ = $2; }
3388 ;
3389
3390array_parameter_dimension:
3391 // Only the first dimension can be empty or have qualifiers.
3392 array_parameter_1st_dimension
3393 | array_parameter_1st_dimension multi_array_dimension
3394 { $$ = $1->addArray( $2 ); }
3395 | multi_array_dimension
3396 ;
3397
3398// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3399//
3400// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3401// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3402
3403array_parameter_1st_dimension:
3404 '[' ']'
3405 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3406 // multi_array_dimension handles the '[' '*' ']' case
3407 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3408 { $$ = DeclarationNode::newVarArray( $3 ); }
3409 | '[' push type_qualifier_list pop ']'
3410 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3411 // multi_array_dimension handles the '[' assignment_expression ']' case
3412 | '[' push type_qualifier_list assignment_expression pop ']'
3413 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3414 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3415 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3416 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3417 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3418 ;
3419
3420// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3421//
3422// struct S {
3423// int;
3424// int *;
3425// int [10];
3426// int (*)();
3427// };
3428
3429variable_abstract_declarator:
3430 variable_abstract_ptr
3431 | variable_abstract_array attribute_list_opt
3432 { $$ = $1->addQualifiers( $2 ); }
3433 | variable_abstract_function attribute_list_opt
3434 { $$ = $1->addQualifiers( $2 ); }
3435 ;
3436
3437variable_abstract_ptr:
3438 ptrref_operator
3439 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3440 | ptrref_operator type_qualifier_list
3441 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3442 | ptrref_operator variable_abstract_declarator
3443 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3444 | ptrref_operator type_qualifier_list variable_abstract_declarator
3445 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3446 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
3447 { $$ = $2->addQualifiers( $4 ); }
3448 ;
3449
3450variable_abstract_array:
3451 array_dimension
3452 | '(' variable_abstract_ptr ')' array_dimension
3453 { $$ = $2->addArray( $4 ); }
3454 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3455 { $$ = $2->addArray( $4 ); }
3456 | '(' variable_abstract_array ')' // redundant parenthesis
3457 { $$ = $2; }
3458 ;
3459
3460variable_abstract_function:
3461 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3462 { $$ = $2->addParamList( $6 ); }
3463 | '(' variable_abstract_function ')' // redundant parenthesis
3464 { $$ = $2; }
3465 ;
3466
3467// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3468// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3469
3470cfa_identifier_parameter_declarator_tuple: // CFA
3471 cfa_identifier_parameter_declarator_no_tuple
3472 | cfa_abstract_tuple
3473 | type_qualifier_list cfa_abstract_tuple
3474 { $$ = $2->addQualifiers( $1 ); }
3475 ;
3476
3477cfa_identifier_parameter_declarator_no_tuple: // CFA
3478 cfa_identifier_parameter_ptr
3479 | cfa_identifier_parameter_array
3480 ;
3481
3482cfa_identifier_parameter_ptr: // CFA
3483 // No SUE declaration in parameter list.
3484 ptrref_operator type_specifier_nobody
3485 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3486 | type_qualifier_list ptrref_operator type_specifier_nobody
3487 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3488 | ptrref_operator cfa_abstract_function
3489 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3490 | type_qualifier_list ptrref_operator cfa_abstract_function
3491 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3492 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3493 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3494 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3495 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3496 ;
3497
3498cfa_identifier_parameter_array: // CFA
3499 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3500 // shift/reduce conflict with new-style empty (void) function return type.
3501 '[' ']' type_specifier_nobody
3502 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3503 | cfa_array_parameter_1st_dimension type_specifier_nobody
3504 { $$ = $2->addNewArray( $1 ); }
3505 | '[' ']' multi_array_dimension type_specifier_nobody
3506 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3507 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3508 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3509 | multi_array_dimension type_specifier_nobody
3510 { $$ = $2->addNewArray( $1 ); }
3511
3512 | '[' ']' cfa_identifier_parameter_ptr
3513 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3514 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3515 { $$ = $2->addNewArray( $1 ); }
3516 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3517 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3518 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3519 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3520 | multi_array_dimension cfa_identifier_parameter_ptr
3521 { $$ = $2->addNewArray( $1 ); }
3522 ;
3523
3524cfa_array_parameter_1st_dimension:
3525 '[' push type_qualifier_list '*' pop ']' // remaining C99
3526 { $$ = DeclarationNode::newVarArray( $3 ); }
3527 | '[' push type_qualifier_list assignment_expression pop ']'
3528 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3529 | '[' push declaration_qualifier_list assignment_expression pop ']'
3530 // declaration_qualifier_list must be used because of shift/reduce conflict with
3531 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3532 // appear in this context.
3533 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3534 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3535 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3536 ;
3537
3538// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3539// identifier to which the type applies, e.g.:
3540//
3541// [int] f( int ); // abstract variable parameter; no parameter name specified
3542// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3543//
3544// These rules need LR(3):
3545//
3546// cfa_abstract_tuple identifier_or_type_name
3547// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
3548//
3549// since a function return type can be syntactically identical to a tuple type:
3550//
3551// [int, int] t;
3552// [int, int] f( int );
3553//
3554// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3555// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3556// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3557// duplicated when appearing with cfa_function_specifier.
3558
3559cfa_abstract_declarator_tuple: // CFA
3560 cfa_abstract_tuple
3561 | type_qualifier_list cfa_abstract_tuple
3562 { $$ = $2->addQualifiers( $1 ); }
3563 | cfa_abstract_declarator_no_tuple
3564 ;
3565
3566cfa_abstract_declarator_no_tuple: // CFA
3567 cfa_abstract_ptr
3568 | cfa_abstract_array
3569 ;
3570
3571cfa_abstract_ptr: // CFA
3572 ptrref_operator type_specifier
3573 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3574 | type_qualifier_list ptrref_operator type_specifier
3575 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3576 | ptrref_operator cfa_abstract_function
3577 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3578 | type_qualifier_list ptrref_operator cfa_abstract_function
3579 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3580 | ptrref_operator cfa_abstract_declarator_tuple
3581 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3582 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3583 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3584 ;
3585
3586cfa_abstract_array: // CFA
3587 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3588 // empty (void) function return type.
3589 '[' ']' type_specifier
3590 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3591 | '[' ']' multi_array_dimension type_specifier
3592 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3593 | multi_array_dimension type_specifier
3594 { $$ = $2->addNewArray( $1 ); }
3595 | '[' ']' cfa_abstract_ptr
3596 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3597 | '[' ']' multi_array_dimension cfa_abstract_ptr
3598 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3599 | multi_array_dimension cfa_abstract_ptr
3600 { $$ = $2->addNewArray( $1 ); }
3601 ;
3602
3603cfa_abstract_tuple: // CFA
3604 '[' push cfa_abstract_parameter_list pop ']'
3605 { $$ = DeclarationNode::newTuple( $3 ); }
3606 | '[' push type_specifier_nobody ELLIPSIS pop ']'
3607 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3608 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
3609 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3610 ;
3611
3612cfa_abstract_function: // CFA
3613// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
3614// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3615 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
3616 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3617 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
3618 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3619 ;
3620
3621// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3622// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3623//
3624// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3625// the declaration specifiers in a declaration is an obsolescent feature."
3626//
3627// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3628// prototype-format parameter type declarators) is an obsolescent feature."
3629//
3630// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3631// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3632
3633//************************* MISCELLANEOUS ********************************
3634
3635comma_opt: // redundant comma
3636 // empty
3637 | ','
3638 ;
3639
3640default_initializer_opt:
3641 // empty
3642 { $$ = nullptr; }
3643 | '=' assignment_expression
3644 { $$ = $2; }
3645 ;
3646
3647%%
3648
3649// ----end of grammar----
3650
3651// Local Variables: //
3652// mode: c++ //
3653// tab-width: 4 //
3654// compile-command: "make install" //
3655// End: //
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