source: src/Parser/parser.yy@ d2fadeb

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since d2fadeb was 4744074, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago

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1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// parser.yy --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Apr 14 18:13:44 2021
13// Update Count : 4983
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, yyy = false; // aggregate have one or more forall qualifiers ?
214
215// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
216#define YYLLOC_DEFAULT(Cur, Rhs, N) \
217if ( N ) { \
218 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
219 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
220 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
221 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
222 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
223} else { \
224 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
225 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
226 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
227}
228%}
229
230%define parse.error verbose
231
232// Types declaration for productions
233%union {
234 Token tok;
235 ParseNode * pn;
236 ExpressionNode * en;
237 DeclarationNode * decl;
238 AggregateDecl::Aggregate aggKey;
239 TypeDecl::Kind tclass;
240 StatementNode * sn;
241 WaitForStmt * wfs;
242 Expression * constant;
243 IfCtrl * ifctl;
244 ForCtrl * fctl;
245 enum OperKinds compop;
246 LabelNode * label;
247 InitializerNode * in;
248 OperKinds op;
249 std::string * str;
250 bool flag;
251 CatchStmt::Kind catch_kind;
252 GenericExpr * genexpr;
253}
254
255//************************* TERMINAL TOKENS ********************************
256
257// keywords
258%token TYPEDEF
259%token EXTERN STATIC AUTO REGISTER
260%token THREADLOCAL // C11
261%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
262%token NORETURN // C11
263%token CONST VOLATILE
264%token RESTRICT // C99
265%token ATOMIC // C11
266%token FORALL MUTEX VIRTUAL 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 ZERO_T ONE_T // CFA
272%token SIZEOF TYPEOF VALIST AUTO_TYPE // GCC
273%token OFFSETOF BASETYPEOF TYPEID // CFA
274%token ENUM STRUCT UNION
275%token EXCEPTION // CFA
276%token GENERATOR COROUTINE MONITOR THREAD // CFA
277%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
278// %token RESUME // CFA
279%token LABEL // GCC
280%token SUSPEND // CFA
281%token ATTRIBUTE EXTENSION // GCC
282%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
283%token CHOOSE FALLTHRU FALLTHROUGH WITH WHEN WAITFOR // CFA
284%token DISABLE ENABLE TRY THROW THROWRESUME AT // CFA
285%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
286%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
287
288// names and constants: lexer differentiates between identifier and typedef names
289%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
290%token<tok> TIMEOUT WOR CATCH RECOVER CATCHRESUME FIXUP FINALLY // CFA
291%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
292%token<tok> DIRECTIVE
293// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
294// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
295// converted into the tuple index (.)(1). e.g., 3.x
296%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
297
298// multi-character operators
299%token ARROW // ->
300%token ICR DECR // ++ --
301%token LS RS // << >>
302%token LE GE EQ NE // <= >= == !=
303%token ANDAND OROR // && ||
304%token ELLIPSIS // ...
305
306%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
307%token PLUSassign MINUSassign // += -=
308%token LSassign RSassign // <<= >>=
309%token ANDassign ERassign ORassign // &= ^= |=
310
311%token ErangeUpEq ErangeDown ErangeDownEq // ~= -~ -~=
312%token ATassign // @=
313
314%type<tok> identifier
315%type<tok> identifier_or_type_name attr_name
316%type<tok> quasi_keyword
317%type<constant> string_literal
318%type<str> string_literal_list
319
320// expressions
321%type<en> constant
322%type<en> tuple tuple_expression_list
323%type<op> ptrref_operator unary_operator assignment_operator simple_assignment_operator compound_assignment_operator
324%type<en> primary_expression postfix_expression unary_expression
325%type<en> cast_expression_list cast_expression exponential_expression multiplicative_expression additive_expression
326%type<en> shift_expression relational_expression equality_expression
327%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
328%type<en> logical_AND_expression logical_OR_expression
329%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
330%type<en> comma_expression comma_expression_opt
331%type<en> argument_expression_list_opt argument_expression default_initializer_opt
332%type<ifctl> if_control_expression
333%type<fctl> for_control_expression for_control_expression_list
334%type<compop> inclexcl
335%type<en> subrange
336%type<decl> asm_name_opt
337%type<en> asm_operands_opt asm_operands_list asm_operand
338%type<label> label_list
339%type<en> asm_clobbers_list_opt
340%type<flag> asm_volatile_opt
341%type<en> handler_predicate_opt
342%type<genexpr> generic_association generic_assoc_list
343
344// statements
345%type<sn> statement labeled_statement compound_statement
346%type<sn> statement_decl statement_decl_list statement_list_nodecl
347%type<sn> selection_statement if_statement
348%type<sn> switch_clause_list_opt switch_clause_list
349%type<en> case_value
350%type<sn> case_clause case_value_list case_label case_label_list
351%type<sn> iteration_statement jump_statement
352%type<sn> expression_statement asm_statement
353%type<sn> with_statement
354%type<en> with_clause_opt
355%type<sn> exception_statement handler_clause finally_clause
356%type<catch_kind> handler_key
357%type<sn> mutex_statement
358%type<en> when_clause when_clause_opt waitfor timeout
359%type<sn> waitfor_statement
360%type<wfs> waitfor_clause
361
362// declarations
363%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
364%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
365%type<decl> abstract_parameter_declaration
366
367%type<aggKey> aggregate_key aggregate_data aggregate_control
368%type<decl> aggregate_type aggregate_type_nobody
369
370%type<decl> assertion assertion_list assertion_list_opt
371
372%type<en> bit_subrange_size_opt bit_subrange_size
373
374%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
375%type<decl> vtable vtable_opt default_opt
376
377%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
378
379%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
380%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
381
382%type<decl> elaborated_type elaborated_type_nobody
383
384%type<decl> enumerator_list enum_type enum_type_nobody
385%type<en> enumerator_value_opt
386
387%type<decl> external_definition external_definition_list external_definition_list_opt
388
389%type<decl> exception_declaration
390
391%type<decl> field_declaration_list_opt field_declaration field_declaring_list_opt field_declarator field_abstract_list_opt field_abstract
392%type<en> field field_name_list field_name fraction_constants_opt
393
394%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
395
396%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
397%type<decl> identifier_list
398
399%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
400%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
401%type<decl> cfa_abstract_ptr cfa_abstract_tuple
402
403%type<decl> cfa_array_parameter_1st_dimension
404
405%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list cfa_field_abstract_list
406%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
407
408%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
409%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
410
411%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
412
413%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
414
415%type<decl> c_declaration static_assert
416%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
417%type<decl> KR_parameter_list KR_parameter_list_opt
418
419%type<decl> parameter_declaration parameter_list parameter_type_list_opt
420
421%type<decl> paren_identifier paren_type
422
423%type<decl> storage_class storage_class_list
424
425%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
426
427%type<tclass> type_class new_type_class
428%type<decl> type_declarator type_declarator_name type_declaring_list
429
430%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
431%type<decl> typedef_name typedef_declaration typedef_expression
432
433%type<decl> variable_type_redeclarator type_ptr type_array type_function
434
435%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
436
437%type<decl> type type_no_function
438%type<decl> type_parameter type_parameter_list type_initializer_opt
439
440%type<en> type_parameters_opt type_list
441
442%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
443%type<decl> type_specifier type_specifier_nobody
444
445%type<decl> variable_declarator variable_ptr variable_array variable_function
446%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
447
448%type<decl> attribute_list_opt attribute_list attribute attribute_name_list attribute_name
449
450// initializers
451%type<in> initializer initializer_list_opt initializer_opt
452
453// designators
454%type<en> designator designator_list designation
455
456
457// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
458// .---------. matches IF '(' comma_expression ')' statement . (reduce)
459// if ( C ) S1 else S2
460// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
461// Similar issues exit with the waitfor statement.
462
463// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
464// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
465%precedence THEN // rule precedence for IF/WAITFOR statement
466%precedence WOR // token precedence for start of WOR in WAITFOR statement
467%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
468%precedence CATCH // token precedence for start of TIMEOUT in WAITFOR statement
469%precedence RECOVER // token precedence for start of TIMEOUT in WAITFOR statement
470%precedence CATCHRESUME // token precedence for start of TIMEOUT in WAITFOR statement
471%precedence FIXUP // token precedence for start of TIMEOUT in WAITFOR statement
472%precedence FINALLY // token precedence for start of TIMEOUT in WAITFOR statement
473%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
474
475
476// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
477// forall( otype T ) struct Foo { T v; };
478// .-----. matches pointer to function returning a generic (which is impossible without a type)
479// Foo ( *fp )( int );
480// `---' matches start of TYPEGENname '('
481// must be:
482// Foo( int ) ( *fp )( int );
483// The same problem occurs here:
484// forall( otype T ) struct Foo { T v; } ( *fp )( int );
485// must be:
486// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
487
488// Order of these lines matters (low-to-high precedence).
489%precedence TYPEGENname
490%precedence '}'
491%precedence '('
492
493// %precedence RESUME
494// %precedence '{'
495// %precedence ')'
496
497%locations // support location tracking for error messages
498
499%start translation_unit // parse-tree root
500
501%%
502//************************* Namespace Management ********************************
503
504// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
505// which are lexically identical.
506//
507// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
508// foo f; // to allow it to appear in this context
509//
510// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
511// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
512// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
513// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
514// must be distinguished by the lexical scanner.
515//
516// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
517// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
518// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
519// each context that introduces a name scope, a new level is created in the type table and that level is popped on
520// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
521// This requires distinguishing between type names that are local to the current declaration scope and those that
522// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
523//
524// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
525// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
526// around the list separator.
527//
528// int f( forall(T) T (*f1) T , forall( S ) S (*f2)( S ) );
529// push pop push pop
530
531push:
532 { typedefTable.enterScope(); }
533 ;
534
535pop:
536 { typedefTable.leaveScope(); }
537 ;
538
539//************************* CONSTANTS ********************************
540
541constant:
542 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
543 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
544 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
545 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
546 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
547 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
548 ;
549
550quasi_keyword: // CFA
551 TIMEOUT
552 | WOR
553 | CATCH
554 | RECOVER
555 | CATCHRESUME
556 | FIXUP
557 | FINALLY
558 ;
559
560identifier:
561 IDENTIFIER
562 | quasi_keyword
563 | '@' // CFA
564 { Token tok = { new string( DeclarationNode::anonymous.newName() ), yylval.tok.loc }; $$ = tok; }
565 ;
566
567string_literal:
568 string_literal_list { $$ = build_constantStr( *$1 ); }
569 ;
570
571string_literal_list: // juxtaposed strings are concatenated
572 STRINGliteral { $$ = $1; } // conversion from tok to str
573 | string_literal_list STRINGliteral
574 {
575 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
576 delete $2; // allocated by lexer
577 $$ = $1; // conversion from tok to str
578 }
579 ;
580
581//************************* EXPRESSIONS ********************************
582
583primary_expression:
584 IDENTIFIER // typedef name cannot be used as a variable name
585 { $$ = new ExpressionNode( build_varref( $1 ) ); }
586 | quasi_keyword
587 { $$ = new ExpressionNode( build_varref( $1 ) ); }
588 | tuple
589 | '(' comma_expression ')'
590 { $$ = $2; }
591 | '(' compound_statement ')' // GCC, lambda expression
592 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast<CompoundStmt *>(maybeMoveBuild<Statement>($2) ) ) ); }
593 | type_name '.' identifier // CFA, nested type
594 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
595 | type_name '.' '[' field_name_list ']' // CFA, nested type / tuple field selector
596 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
597 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
598 {
599 // add the missing control expression to the GenericExpr and return it
600 $5->control = maybeMoveBuild<Expression>( $3 );
601 $$ = new ExpressionNode( $5 );
602 }
603 // | RESUME '(' comma_expression ')'
604 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
605 // | RESUME '(' comma_expression ')' compound_statement
606 // { SemanticError( yylloc, "Resume expression is currently unimplemented." ); $$ = nullptr; }
607 ;
608
609generic_assoc_list: // C11
610 generic_association
611 | generic_assoc_list ',' generic_association
612 {
613 // steal the association node from the singleton and delete the wrapper
614 $1->associations.splice($1->associations.end(), $3->associations);
615 delete $3;
616 $$ = $1;
617 }
618 ;
619
620generic_association: // C11
621 type_no_function ':' assignment_expression
622 {
623 // create a GenericExpr wrapper with one association pair
624 $$ = new GenericExpr( nullptr, { { maybeMoveBuildType($1), maybeMoveBuild<Expression>( $3 ) } } );
625 }
626 | DEFAULT ':' assignment_expression
627 { $$ = new GenericExpr( nullptr, { { maybeMoveBuild<Expression>( $3 ) } } ); }
628 ;
629
630postfix_expression:
631 primary_expression
632 | postfix_expression '[' assignment_expression ',' comma_expression ']'
633 // { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, new ExpressionNode( build_binary_val( OperKinds::Index, $3, $5 ) ) ) ); }
634 { SemanticError( yylloc, "New array subscript is currently unimplemented." ); $$ = nullptr; }
635 | postfix_expression '[' assignment_expression ']'
636 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
637 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
638 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
639 // equivalent to the old x[i,j].
640 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
641 | postfix_expression '{' argument_expression_list_opt '}' // CFA, constructor call
642 {
643 Token fn;
644 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
645 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
646 }
647 | postfix_expression '(' argument_expression_list_opt ')'
648 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
649 | postfix_expression '`' identifier // CFA, postfix call
650 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
651 | constant '`' identifier // CFA, postfix call
652 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), $1 ) ); }
653 | string_literal '`' identifier // CFA, postfix call
654 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( build_postfix_name( $3 ) ) ), new ExpressionNode( $1 ) ) ); }
655 | postfix_expression '.' identifier
656 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
657 | postfix_expression '.' INTEGERconstant // CFA, tuple index
658 { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); }
659 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
660 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
661 | postfix_expression '.' '[' field_name_list ']' // CFA, tuple field selector
662 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
663 | postfix_expression '.' aggregate_control
664 { $$ = new ExpressionNode( build_keyword_cast( $3, $1 ) ); }
665 | postfix_expression ARROW identifier
666 { $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
667 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
668 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
669 | postfix_expression ARROW '[' field_name_list ']' // CFA, tuple field selector
670 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
671 | postfix_expression ICR
672 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
673 | postfix_expression DECR
674 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
675 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
676 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
677 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
678 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
679 | '^' primary_expression '{' argument_expression_list_opt '}' // CFA, destructor call
680 {
681 Token fn;
682 fn.str = new string( "^?{}" ); // location undefined
683 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
684 }
685 ;
686
687argument_expression_list_opt:
688 // empty
689 { $$ = nullptr; }
690 | argument_expression
691 | argument_expression_list_opt ',' argument_expression
692 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
693 ;
694
695argument_expression:
696 '@' // CFA, default parameter
697 { SemanticError( yylloc, "Default parameter for argument is currently unimplemented." ); $$ = nullptr; }
698 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
699 | assignment_expression
700 ;
701
702field_name_list: // CFA, tuple field selector
703 field
704 | field_name_list ',' field { $$ = (ExpressionNode *)($1->set_last( $3 )); }
705 ;
706
707field: // CFA, tuple field selector
708 field_name
709 | FLOATING_DECIMALconstant field
710 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
711 | FLOATING_DECIMALconstant '[' field_name_list ']'
712 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); }
713 | field_name '.' field
714 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
715 | field_name '.' '[' field_name_list ']'
716 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
717 | field_name ARROW field
718 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
719 | field_name ARROW '[' field_name_list ']'
720 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
721 ;
722
723field_name:
724 INTEGERconstant fraction_constants_opt
725 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
726 | FLOATINGconstant fraction_constants_opt
727 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
728 | identifier fraction_constants_opt
729 {
730 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
731 }
732 ;
733
734fraction_constants_opt:
735 // empty
736 { $$ = nullptr; }
737 | fraction_constants_opt FLOATING_FRACTIONconstant
738 {
739 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
740 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
741 }
742 ;
743
744unary_expression:
745 postfix_expression
746 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
747 // semantics checks, e.g., ++3, 3--, *3, &&3
748 | constant
749 | string_literal
750 { $$ = new ExpressionNode( $1 ); }
751 | EXTENSION cast_expression // GCC
752 { $$ = $2->set_extension( true ); }
753 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
754 // { * X; } // dereference X
755 // { * int X; } // CFA declaration of pointer to int
756 | ptrref_operator cast_expression // CFA
757 {
758 switch ( $1 ) {
759 case OperKinds::AddressOf:
760 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) );
761 break;
762 case OperKinds::PointTo:
763 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
764 break;
765 case OperKinds::And:
766 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild<Expression>( $2 ) ) ) );
767 break;
768 default:
769 assert( false );
770 }
771 }
772 | unary_operator cast_expression
773 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
774 | ICR unary_expression
775 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
776 | DECR unary_expression
777 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
778 | SIZEOF unary_expression
779 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
780 | SIZEOF '(' type_no_function ')'
781 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
782 | ALIGNOF unary_expression // GCC, variable alignment
783 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild<Expression>( $2 ) ) ); }
784 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
785 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
786 | OFFSETOF '(' type_no_function ',' identifier ')'
787 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
788 | TYPEID '(' type_no_function ')'
789 {
790 SemanticError( yylloc, "typeid name is currently unimplemented." ); $$ = nullptr;
791 // $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) );
792 }
793 ;
794
795ptrref_operator:
796 '*' { $$ = OperKinds::PointTo; }
797 | '&' { $$ = OperKinds::AddressOf; }
798 // GCC, address of label must be handled by semantic check for ref,ref,label
799 | ANDAND { $$ = OperKinds::And; }
800 ;
801
802unary_operator:
803 '+' { $$ = OperKinds::UnPlus; }
804 | '-' { $$ = OperKinds::UnMinus; }
805 | '!' { $$ = OperKinds::Neg; }
806 | '~' { $$ = OperKinds::BitNeg; }
807 ;
808
809cast_expression:
810 unary_expression
811 | '(' type_no_function ')' cast_expression
812 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
813 | '(' aggregate_control '&' ')' cast_expression // CFA
814 { $$ = new ExpressionNode( build_keyword_cast( $2, $5 ) ); }
815 | '(' VIRTUAL ')' cast_expression // CFA
816 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $4 ), maybeMoveBuildType( nullptr ) ) ); }
817 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
818 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild<Expression>( $5 ), maybeMoveBuildType( $3 ) ) ); }
819 | '(' RETURN type_no_function ')' cast_expression // CFA
820 { SemanticError( yylloc, "Return cast is currently unimplemented." ); $$ = nullptr; }
821 | '(' COERCE type_no_function ')' cast_expression // CFA
822 { SemanticError( yylloc, "Coerce cast is currently unimplemented." ); $$ = nullptr; }
823 | '(' qualifier_cast_list ')' cast_expression // CFA
824 { SemanticError( yylloc, "Qualifier cast is currently unimplemented." ); $$ = nullptr; }
825// | '(' type_no_function ')' tuple
826// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
827 ;
828
829qualifier_cast_list:
830 cast_modifier type_qualifier_name
831 | cast_modifier MUTEX
832 | qualifier_cast_list cast_modifier type_qualifier_name
833 | qualifier_cast_list cast_modifier MUTEX
834 ;
835
836cast_modifier:
837 '-'
838 | '+'
839 ;
840
841exponential_expression:
842 cast_expression
843 | exponential_expression '\\' cast_expression
844 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
845 ;
846
847multiplicative_expression:
848 exponential_expression
849 | multiplicative_expression '*' exponential_expression
850 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
851 | multiplicative_expression '/' exponential_expression
852 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
853 | multiplicative_expression '%' exponential_expression
854 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
855 ;
856
857additive_expression:
858 multiplicative_expression
859 | additive_expression '+' multiplicative_expression
860 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
861 | additive_expression '-' multiplicative_expression
862 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
863 ;
864
865shift_expression:
866 additive_expression
867 | shift_expression LS additive_expression
868 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
869 | shift_expression RS additive_expression
870 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
871 ;
872
873relational_expression:
874 shift_expression
875 | relational_expression '<' shift_expression
876 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
877 | relational_expression '>' shift_expression
878 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
879 | relational_expression LE shift_expression
880 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
881 | relational_expression GE shift_expression
882 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
883 ;
884
885equality_expression:
886 relational_expression
887 | equality_expression EQ relational_expression
888 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
889 | equality_expression NE relational_expression
890 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
891 ;
892
893AND_expression:
894 equality_expression
895 | AND_expression '&' equality_expression
896 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
897 ;
898
899exclusive_OR_expression:
900 AND_expression
901 | exclusive_OR_expression '^' AND_expression
902 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
903 ;
904
905inclusive_OR_expression:
906 exclusive_OR_expression
907 | inclusive_OR_expression '|' exclusive_OR_expression
908 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
909 ;
910
911logical_AND_expression:
912 inclusive_OR_expression
913 | logical_AND_expression ANDAND inclusive_OR_expression
914 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
915 ;
916
917logical_OR_expression:
918 logical_AND_expression
919 | logical_OR_expression OROR logical_AND_expression
920 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
921 ;
922
923conditional_expression:
924 logical_OR_expression
925 | logical_OR_expression '?' comma_expression ':' conditional_expression
926 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
927 // FIX ME: computes $1 twice
928 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
929 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
930 ;
931
932constant_expression:
933 conditional_expression
934 ;
935
936assignment_expression:
937 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
938 conditional_expression
939 | unary_expression assignment_operator assignment_expression
940 {
941// if ( $2 == OperKinds::AtAssn ) {
942// SemanticError( yylloc, "C @= assignment is currently unimplemented." ); $$ = nullptr;
943// } else {
944 $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) );
945// } // if
946 }
947 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
948 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
949 ;
950
951assignment_expression_opt:
952 // empty
953 { $$ = nullptr; }
954 | assignment_expression
955 ;
956
957assignment_operator:
958 simple_assignment_operator
959 | compound_assignment_operator
960 ;
961
962simple_assignment_operator:
963 '=' { $$ = OperKinds::Assign; }
964 | ATassign { $$ = OperKinds::AtAssn; } // CFA
965 ;
966
967compound_assignment_operator:
968 EXPassign { $$ = OperKinds::ExpAssn; }
969 | MULTassign { $$ = OperKinds::MulAssn; }
970 | DIVassign { $$ = OperKinds::DivAssn; }
971 | MODassign { $$ = OperKinds::ModAssn; }
972 | PLUSassign { $$ = OperKinds::PlusAssn; }
973 | MINUSassign { $$ = OperKinds::MinusAssn; }
974 | LSassign { $$ = OperKinds::LSAssn; }
975 | RSassign { $$ = OperKinds::RSAssn; }
976 | ANDassign { $$ = OperKinds::AndAssn; }
977 | ERassign { $$ = OperKinds::ERAssn; }
978 | ORassign { $$ = OperKinds::OrAssn; }
979 ;
980
981tuple: // CFA, tuple
982 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
983 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
984// '[' ']'
985// { $$ = new ExpressionNode( build_tuple() ); }
986// | '[' push assignment_expression pop ']'
987// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
988 '[' ',' tuple_expression_list ']'
989 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
990 | '[' push assignment_expression pop ',' tuple_expression_list ']'
991 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)($3->set_last( $6 ) ) )); }
992 ;
993
994tuple_expression_list:
995 assignment_expression
996 | '@' // CFA
997 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
998 | tuple_expression_list ',' assignment_expression
999 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1000 | tuple_expression_list ',' '@'
1001 { SemanticError( yylloc, "Eliding tuple element with '@' is currently unimplemented." ); $$ = nullptr; }
1002 ;
1003
1004comma_expression:
1005 assignment_expression
1006 | comma_expression ',' assignment_expression
1007 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1008 ;
1009
1010comma_expression_opt:
1011 // empty
1012 { $$ = nullptr; }
1013 | comma_expression
1014 ;
1015
1016//*************************** STATEMENTS *******************************
1017
1018statement:
1019 labeled_statement
1020 | compound_statement
1021 | expression_statement
1022 | selection_statement
1023 | iteration_statement
1024 | jump_statement
1025 | with_statement
1026 | mutex_statement
1027 | waitfor_statement
1028 | exception_statement
1029 | enable_disable_statement
1030 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
1031 | asm_statement
1032 | DIRECTIVE
1033 { $$ = new StatementNode( build_directive( $1 ) ); }
1034 ;
1035
1036labeled_statement:
1037 // labels cannot be identifiers 0 or 1
1038 identifier_or_type_name ':' attribute_list_opt statement
1039 { $$ = $4->add_label( $1, $3 ); }
1040 ;
1041
1042compound_statement:
1043 '{' '}'
1044 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
1045 | '{' push
1046 local_label_declaration_opt // GCC, local labels appear at start of block
1047 statement_decl_list // C99, intermix declarations and statements
1048 pop '}'
1049 { $$ = new StatementNode( build_compound( $4 ) ); }
1050 ;
1051
1052statement_decl_list: // C99
1053 statement_decl
1054 | statement_decl_list statement_decl
1055 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1056 ;
1057
1058statement_decl:
1059 declaration // CFA, new & old style declarations
1060 { $$ = new StatementNode( $1 ); }
1061 | EXTENSION declaration // GCC
1062 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1063 | function_definition
1064 { $$ = new StatementNode( $1 ); }
1065 | EXTENSION function_definition // GCC
1066 { distExt( $2 ); $$ = new StatementNode( $2 ); }
1067 | statement
1068 ;
1069
1070statement_list_nodecl:
1071 statement
1072 | statement_list_nodecl statement
1073 { assert( $1 ); $1->set_last( $2 ); $$ = $1; }
1074 ;
1075
1076expression_statement:
1077 comma_expression_opt ';'
1078 { $$ = new StatementNode( build_expr( $1 ) ); }
1079 ;
1080
1081selection_statement:
1082 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
1083 // the inherent S/R conflict with THEN/ELSE.
1084 push if_statement pop
1085 { $$ = $2; }
1086 | SWITCH '(' comma_expression ')' case_clause
1087 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
1088 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1089 {
1090 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
1091 // The semantics of the declaration list is changed to include associated initialization, which is performed
1092 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1093 // statement around the switch. Statements after the initial declaration list can never be executed, and
1094 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1095 // statement.
1096 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1097 }
1098 | CHOOSE '(' comma_expression ')' case_clause // CFA
1099 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
1100 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
1101 {
1102 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
1103 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
1104 }
1105 ;
1106
1107if_statement:
1108 IF '(' if_control_expression ')' statement %prec THEN
1109 // explicitly deal with the shift/reduce conflict on if/else
1110 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), nullptr ) ); }
1111 | IF '(' if_control_expression ')' statement ELSE statement
1112 { $$ = new StatementNode( build_if( $3, maybe_build_compound( $5 ), maybe_build_compound( $7 ) ) ); }
1113 ;
1114
1115if_control_expression:
1116 comma_expression
1117 { $$ = new IfCtrl( nullptr, $1 ); }
1118 | c_declaration // no semi-colon
1119 { $$ = new IfCtrl( $1, nullptr ); }
1120 | cfa_declaration // no semi-colon
1121 { $$ = new IfCtrl( $1, nullptr ); }
1122 | declaration comma_expression // semi-colon separated
1123 { $$ = new IfCtrl( $1, $2 ); }
1124 ;
1125
1126// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1127// clause allows a list of values and subranges.
1128
1129case_value: // CFA
1130 constant_expression { $$ = $1; }
1131 | constant_expression ELLIPSIS constant_expression // GCC, subrange
1132 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
1133 | subrange // CFA, subrange
1134 ;
1135
1136case_value_list: // CFA
1137 case_value { $$ = new StatementNode( build_case( $1 ) ); }
1138 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
1139 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
1140 ;
1141
1142case_label: // CFA
1143 CASE case_value_list ':' { $$ = $2; }
1144 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
1145 // A semantic check is required to ensure only one default clause per switch/choose statement.
1146 ;
1147
1148//label_list_opt:
1149// // empty
1150// | identifier_or_type_name ':'
1151// | label_list_opt identifier_or_type_name ':'
1152// ;
1153
1154case_label_list: // CFA
1155 case_label
1156 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
1157 ;
1158
1159case_clause: // CFA
1160 case_label_list statement { $$ = $1->append_last_case( maybe_build_compound( $2 ) ); }
1161 ;
1162
1163switch_clause_list_opt: // CFA
1164 // empty
1165 { $$ = nullptr; }
1166 | switch_clause_list
1167 ;
1168
1169switch_clause_list: // CFA
1170 case_label_list statement_list_nodecl
1171 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1172 | switch_clause_list case_label_list statement_list_nodecl
1173 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
1174 ;
1175
1176iteration_statement:
1177 WHILE '(' push if_control_expression ')' statement pop
1178 { $$ = new StatementNode( build_while( $4, maybe_build_compound( $6 ) ) ); }
1179 | WHILE '(' ')' statement // CFA => while ( 1 )
1180 { $$ = new StatementNode( build_while( new IfCtrl( nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ), maybe_build_compound( $4 ) ) ); }
1181 | DO statement WHILE '(' comma_expression ')' ';'
1182 { $$ = new StatementNode( build_do_while( $5, maybe_build_compound( $2 ) ) ); }
1183 | DO statement WHILE '(' ')' ';' // CFA => do while( 1 )
1184 { $$ = new StatementNode( build_do_while( new ExpressionNode( build_constantInteger( *new string( "1" ) ) ), maybe_build_compound( $2 ) ) ); }
1185 | FOR '(' push for_control_expression_list ')' statement pop
1186 { $$ = new StatementNode( build_for( $4, maybe_build_compound( $6 ) ) ); }
1187 | FOR '(' ')' statement // CFA => for ( ;; )
1188 { $$ = new StatementNode( build_for( new ForCtrl( (ExpressionNode * )nullptr, (ExpressionNode * )nullptr, (ExpressionNode * )nullptr ), maybe_build_compound( $4 ) ) ); }
1189 ;
1190
1191for_control_expression_list:
1192 for_control_expression
1193 | for_control_expression_list ':' for_control_expression
1194 // ForCtrl + ForCtrl:
1195 // init + init => multiple declaration statements that are hoisted
1196 // condition + condition => (expression) && (expression)
1197 // change + change => (expression), (expression)
1198 {
1199 $1->init->set_last( $3->init );
1200 if ( $1->condition ) {
1201 if ( $3->condition ) {
1202 $1->condition->expr.reset( new LogicalExpr( $1->condition->expr.release(), $3->condition->expr.release(), true ) );
1203 } // if
1204 } else $1->condition = $3->condition;
1205 if ( $1->change ) {
1206 if ( $3->change ) {
1207 $1->change->expr.reset( new CommaExpr( $1->change->expr.release(), $3->change->expr.release() ) );
1208 } // if
1209 } else $1->change = $3->change;
1210 $$ = $1;
1211 }
1212 ;
1213
1214for_control_expression:
1215 ';' comma_expression_opt ';' comma_expression_opt
1216 { $$ = new ForCtrl( (ExpressionNode * )nullptr, $2, $4 ); }
1217 | comma_expression ';' comma_expression_opt ';' comma_expression_opt
1218 { $$ = new ForCtrl( $1, $3, $5 ); }
1219 | declaration comma_expression_opt ';' comma_expression_opt // C99, declaration has ';'
1220 { $$ = new ForCtrl( $1, $2, $4 ); }
1221
1222 | comma_expression // CFA
1223 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1224 OperKinds::LThan, $1->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1225 | '=' comma_expression // CFA
1226 { $$ = forCtrl( $2, new string( DeclarationNode::anonymous.newName() ), new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1227 OperKinds::LEThan, $2->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1228 | comma_expression inclexcl comma_expression // CFA
1229 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1230 | comma_expression inclexcl comma_expression '~' comma_expression // CFA
1231 { $$ = forCtrl( $1, new string( DeclarationNode::anonymous.newName() ), $1->clone(), $2, $3, $5 ); }
1232 | comma_expression ';' // CFA
1233 { $$ = forCtrl( new ExpressionNode( build_constantInteger( *new string( "0u" ) ) ), $1, nullptr, OperKinds::LThan, nullptr, nullptr ); }
1234 | comma_expression ';' comma_expression // CFA
1235 { $$ = forCtrl( $3, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1236 OperKinds::LThan, $3->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1237 | comma_expression ';' '=' comma_expression // CFA
1238 { $$ = forCtrl( $4, $1, new ExpressionNode( build_constantInteger( *new string( "0" ) ) ),
1239 OperKinds::LEThan, $4->clone(), new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1240 | comma_expression ';' comma_expression inclexcl comma_expression // CFA
1241 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1242 | comma_expression ';' comma_expression inclexcl comma_expression '~' comma_expression // CFA
1243 { $$ = forCtrl( $3, $1, $3->clone(), $4, $5, $7 ); }
1244
1245 | comma_expression ';' TYPEDEFname // CFA, array type
1246 {
1247 SemanticError( yylloc, "Array interator is currently unimplemented." ); $$ = nullptr;
1248 $$ = forCtrl( new ExpressionNode( build_varref( $3 ) ), $1, nullptr, OperKinds::Range, nullptr, nullptr );
1249 }
1250
1251 // There is a S/R conflicit if ~ and -~ are factored out.
1252 | comma_expression ';' comma_expression '~' '@' // CFA
1253 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1254 | comma_expression ';' comma_expression ErangeDown '@' // CFA
1255 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, new ExpressionNode( build_constantInteger( *new string( "1" ) ) ) ); }
1256 | comma_expression ';' comma_expression '~' '@' '~' comma_expression // CFA
1257 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, $7 ); }
1258 | comma_expression ';' comma_expression ErangeDown '@' '~' comma_expression // CFA
1259 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::GThan, nullptr, $7 ); }
1260 | comma_expression ';' comma_expression '~' '@' '~' '@' // CFA
1261 { $$ = forCtrl( $3, $1, $3->clone(), OperKinds::LThan, nullptr, nullptr ); }
1262 ;
1263
1264inclexcl:
1265 '~'
1266 { $$ = OperKinds::LThan; }
1267 | ErangeUpEq
1268 { $$ = OperKinds::LEThan; }
1269 | ErangeDown
1270 { $$ = OperKinds::GThan; }
1271 | ErangeDownEq
1272 { $$ = OperKinds::GEThan; }
1273 ;
1274
1275jump_statement:
1276 GOTO identifier_or_type_name ';'
1277 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1278 | GOTO '*' comma_expression ';' // GCC, computed goto
1279 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1280 // whereas normal operator precedence yields goto (*i)+3;
1281 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1282 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1283 | fall_through_name ';' // CFA
1284 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1285 | fall_through_name identifier_or_type_name ';' // CFA
1286 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1287 | fall_through_name DEFAULT ';' // CFA
1288 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1289 | CONTINUE ';'
1290 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1291 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1292 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1293 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1294 // the target of the transfer appears only at the start of an iteration statement.
1295 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1296 | BREAK ';'
1297 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1298 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1299 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1300 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1301 // the target of the transfer appears only at the start of an iteration statement.
1302 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1303 | RETURN comma_expression_opt ';'
1304 { $$ = new StatementNode( build_return( $2 ) ); }
1305 | RETURN '{' initializer_list_opt comma_opt '}' ';'
1306 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
1307 | SUSPEND ';'
1308 { $$ = new StatementNode( build_suspend( nullptr ) ); }
1309 | SUSPEND compound_statement
1310 { $$ = new StatementNode( build_suspend( $2 ) ); }
1311 | SUSPEND COROUTINE ';'
1312 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Coroutine ) ); }
1313 | SUSPEND COROUTINE compound_statement
1314 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Coroutine ) ); }
1315 | SUSPEND GENERATOR ';'
1316 { $$ = new StatementNode( build_suspend( nullptr, SuspendStmt::Generator ) ); }
1317 | SUSPEND GENERATOR compound_statement
1318 { $$ = new StatementNode( build_suspend( $3, SuspendStmt::Generator ) ); }
1319 | THROW assignment_expression_opt ';' // handles rethrow
1320 { $$ = new StatementNode( build_throw( $2 ) ); }
1321 | THROWRESUME assignment_expression_opt ';' // handles reresume
1322 { $$ = new StatementNode( build_resume( $2 ) ); }
1323 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1324 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1325 ;
1326
1327fall_through_name: // CFA
1328 FALLTHRU
1329 | FALLTHROUGH
1330 ;
1331
1332with_statement:
1333 WITH '(' tuple_expression_list ')' statement
1334 {
1335 $$ = new StatementNode( build_with( $3, $5 ) );
1336 }
1337 ;
1338
1339// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1340mutex_statement:
1341 MUTEX '(' argument_expression_list_opt ')' statement
1342 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; }
1343 ;
1344
1345when_clause:
1346 WHEN '(' comma_expression ')' { $$ = $3; }
1347 ;
1348
1349when_clause_opt:
1350 // empty
1351 { $$ = nullptr; }
1352 | when_clause
1353 ;
1354
1355waitfor:
1356 WAITFOR '(' cast_expression ')'
1357 { $$ = $3; }
1358// | WAITFOR '(' cast_expression ',' argument_expression_list_opt ')'
1359// { $$ = (ExpressionNode *)$3->set_last( $5 ); }
1360 | WAITFOR '(' cast_expression_list ':' argument_expression_list_opt ')'
1361 { $$ = (ExpressionNode *)($3->set_last( $5 )); }
1362 ;
1363
1364cast_expression_list:
1365 cast_expression
1366 | cast_expression_list ',' cast_expression
1367 // { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1368 { SemanticError( yylloc, "List of mutex member is currently unimplemented." ); $$ = nullptr; }
1369 ;
1370
1371timeout:
1372 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1373 ;
1374
1375waitfor_clause:
1376 when_clause_opt waitfor statement %prec THEN
1377 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1 ); }
1378 | when_clause_opt waitfor statement WOR waitfor_clause
1379 { $$ = build_waitfor( $2, maybe_build_compound( $3 ), $1, $5 ); }
1380 | when_clause_opt timeout statement %prec THEN
1381 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1 ); }
1382 | when_clause_opt ELSE statement
1383 { $$ = build_waitfor_timeout( nullptr, maybe_build_compound( $3 ), $1 ); }
1384 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1385 | when_clause_opt timeout statement WOR ELSE statement
1386 { SemanticError( yylloc, "else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
1387 | when_clause_opt timeout statement WOR when_clause ELSE statement
1388 { $$ = build_waitfor_timeout( $2, maybe_build_compound( $3 ), $1, maybe_build_compound( $7 ), $5 ); }
1389 ;
1390
1391waitfor_statement:
1392 when_clause_opt waitfor statement %prec THEN
1393 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1394 | when_clause_opt waitfor statement WOR waitfor_clause
1395 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1396 ;
1397
1398exception_statement:
1399 TRY compound_statement handler_clause %prec THEN
1400 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1401 | TRY compound_statement finally_clause
1402 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1403 | TRY compound_statement handler_clause finally_clause
1404 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1405 ;
1406
1407handler_clause:
1408 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1409 { $$ = new StatementNode( build_catch( $1, $4, $6, $8 ) ); }
1410 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement
1411 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $5, $7, $9 ) ) ); }
1412 ;
1413
1414handler_predicate_opt:
1415 // empty
1416 { $$ = nullptr; }
1417 | ';' conditional_expression { $$ = $2; }
1418 ;
1419
1420handler_key:
1421 CATCH { $$ = CatchStmt::Terminate; }
1422 | RECOVER { $$ = CatchStmt::Terminate; }
1423 | CATCHRESUME { $$ = CatchStmt::Resume; }
1424 | FIXUP { $$ = CatchStmt::Resume; }
1425 ;
1426
1427finally_clause:
1428 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1429 ;
1430
1431exception_declaration:
1432 // No SUE declaration in parameter list.
1433 type_specifier_nobody
1434 | type_specifier_nobody declarator
1435 { $$ = $2->addType( $1 ); }
1436 | type_specifier_nobody variable_abstract_declarator
1437 { $$ = $2->addType( $1 ); }
1438 | cfa_abstract_declarator_tuple identifier // CFA
1439 { $$ = $1->addName( $2 ); }
1440 | cfa_abstract_declarator_tuple // CFA
1441 ;
1442
1443enable_disable_statement:
1444 enable_disable_key identifier_list compound_statement
1445 ;
1446
1447enable_disable_key:
1448 ENABLE
1449 | DISABLE
1450 ;
1451
1452asm_statement:
1453 ASM asm_volatile_opt '(' string_literal ')' ';'
1454 { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
1455 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1456 { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
1457 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1458 { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); }
1459 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1460 { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
1461 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1462 { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
1463 ;
1464
1465asm_volatile_opt: // GCC
1466 // empty
1467 { $$ = false; }
1468 | VOLATILE
1469 { $$ = true; }
1470 ;
1471
1472asm_operands_opt: // GCC
1473 // empty
1474 { $$ = nullptr; } // use default argument
1475 | asm_operands_list
1476 ;
1477
1478asm_operands_list: // GCC
1479 asm_operand
1480 | asm_operands_list ',' asm_operand
1481 { $$ = (ExpressionNode *)($1->set_last( $3 )); }
1482 ;
1483
1484asm_operand: // GCC
1485 string_literal '(' constant_expression ')'
1486 { $$ = new ExpressionNode( new AsmExpr( nullptr, $1, maybeMoveBuild<Expression>( $3 ) ) ); }
1487 | '[' IDENTIFIER ']' string_literal '(' constant_expression ')'
1488 { $$ = new ExpressionNode( new AsmExpr( $2, $4, maybeMoveBuild<Expression>( $6 ) ) ); }
1489 ;
1490
1491asm_clobbers_list_opt: // GCC
1492 // empty
1493 { $$ = nullptr; } // use default argument
1494 | string_literal
1495 { $$ = new ExpressionNode( $1 ); }
1496 | asm_clobbers_list_opt ',' string_literal
1497 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( $3 ) )); }
1498 ;
1499
1500label_list:
1501 identifier
1502 {
1503 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1504 delete $1; // allocated by lexer
1505 }
1506 | label_list ',' identifier
1507 {
1508 $$ = $1; $1->labels.push_back( *$3 );
1509 delete $3; // allocated by lexer
1510 }
1511 ;
1512
1513//******************************* DECLARATIONS *********************************
1514
1515declaration_list_opt: // used at beginning of switch statement
1516 // empty
1517 { $$ = nullptr; }
1518 | declaration_list
1519 ;
1520
1521declaration_list:
1522 declaration
1523 | declaration_list declaration
1524 { $$ = $1->appendList( $2 ); }
1525 ;
1526
1527KR_parameter_list_opt: // used to declare parameter types in K&R style functions
1528 // empty
1529 { $$ = nullptr; }
1530 | KR_parameter_list
1531 ;
1532
1533KR_parameter_list:
1534 push c_declaration pop ';'
1535 { $$ = $2; }
1536 | KR_parameter_list push c_declaration pop ';'
1537 { $$ = $1->appendList( $3 ); }
1538 ;
1539
1540local_label_declaration_opt: // GCC, local label
1541 // empty
1542 | local_label_declaration_list
1543 ;
1544
1545local_label_declaration_list: // GCC, local label
1546 LABEL local_label_list ';'
1547 | local_label_declaration_list LABEL local_label_list ';'
1548 ;
1549
1550local_label_list: // GCC, local label
1551 identifier_or_type_name
1552 | local_label_list ',' identifier_or_type_name
1553 ;
1554
1555declaration: // old & new style declarations
1556 c_declaration ';'
1557 | cfa_declaration ';' // CFA
1558 | static_assert // C11
1559 ;
1560
1561static_assert:
1562 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1563 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
1564 | STATICASSERT '(' constant_expression ')' ';' // CFA
1565 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( *new string( "\"\"" ) ) ); }
1566
1567// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1568// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1569// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1570// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1571// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1572// block, but cannot be mixed within a specific declaration.
1573//
1574// CFA C
1575// [10] int x; int x[10]; // array of 10 integers
1576// [10] * char y; char *y[10]; // array of 10 pointers to char
1577
1578cfa_declaration: // CFA
1579 cfa_variable_declaration
1580 | cfa_typedef_declaration
1581 | cfa_function_declaration
1582 | type_declaring_list
1583 { SemanticError( yylloc, "otype declaration is currently unimplemented." ); $$ = nullptr; }
1584 | trait_specifier
1585 ;
1586
1587cfa_variable_declaration: // CFA
1588 cfa_variable_specifier initializer_opt
1589 { $$ = $1->addInitializer( $2 ); }
1590 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1591 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1592 // them as a type_qualifier cannot appear in that context.
1593 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
1594 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1595 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
1596 ;
1597
1598cfa_variable_specifier: // CFA
1599 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1600 // storage-class
1601 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1602 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1603 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1604 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
1605 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1606 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
1607 ;
1608
1609cfa_function_declaration: // CFA
1610 cfa_function_specifier
1611 | type_qualifier_list cfa_function_specifier
1612 { $$ = $2->addQualifiers( $1 ); }
1613 | declaration_qualifier_list cfa_function_specifier
1614 { $$ = $2->addQualifiers( $1 ); }
1615 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1616 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
1617 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
1618 {
1619 // Append the return type at the start (left-hand-side) to each identifier in the list.
1620 DeclarationNode * ret = new DeclarationNode;
1621 ret->type = maybeClone( $1->type->base );
1622 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
1623 }
1624 ;
1625
1626cfa_function_specifier: // CFA
1627// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
1628// {
1629// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1630// }
1631// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
1632// {
1633// typedefTable.setNextIdentifier( *$5 );
1634// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1635// }
1636// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
1637// {
1638// typedefTable.setNextIdentifier( *$5 );
1639// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1640// }
1641// | '[' ']' typegen_name
1642 // identifier_or_type_name must be broken apart because of the sequence:
1643 //
1644 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
1645 // '[' ']' type_specifier
1646 //
1647 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1648 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1649 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1650 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1651 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1652 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
1653 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
1654 ;
1655
1656cfa_function_return: // CFA
1657 '[' push cfa_parameter_list pop ']'
1658 { $$ = DeclarationNode::newTuple( $3 ); }
1659 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1660 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
1661 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1662 ;
1663
1664cfa_typedef_declaration: // CFA
1665 TYPEDEF cfa_variable_specifier
1666 {
1667 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "1" );
1668 $$ = $2->addTypedef();
1669 }
1670 | TYPEDEF cfa_function_specifier
1671 {
1672 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "2" );
1673 $$ = $2->addTypedef();
1674 }
1675 | cfa_typedef_declaration pop ',' push identifier
1676 {
1677 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "3" );
1678 $$ = $1->appendList( $1->cloneType( $5 ) );
1679 }
1680 ;
1681
1682// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1683// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1684
1685typedef_declaration:
1686 TYPEDEF type_specifier declarator
1687 {
1688 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "4" );
1689 $$ = $3->addType( $2 )->addTypedef();
1690 }
1691 | typedef_declaration pop ',' push declarator
1692 {
1693 typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname, "5" );
1694 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1695 }
1696 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1697 {
1698 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "6" );
1699 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1700 }
1701 | type_specifier TYPEDEF declarator
1702 {
1703 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "7" );
1704 $$ = $3->addType( $1 )->addTypedef();
1705 }
1706 | type_specifier TYPEDEF type_qualifier_list declarator
1707 {
1708 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "8" );
1709 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1710 }
1711 ;
1712
1713typedef_expression:
1714 // deprecated GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1715 TYPEDEF identifier '=' assignment_expression
1716 {
1717 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1718 }
1719 | typedef_expression pop ',' push identifier '=' assignment_expression
1720 {
1721 SemanticError( yylloc, "Typedef expression is deprecated, use typeof(...) instead." ); $$ = nullptr;
1722 }
1723 ;
1724
1725c_declaration:
1726 declaration_specifier declaring_list
1727 { $$ = distAttr( $1, $2 ); }
1728 | typedef_declaration
1729 | typedef_expression // deprecated GCC, naming expression type
1730 | sue_declaration_specifier
1731 ;
1732
1733declaring_list:
1734 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1735 // storage-class
1736 declarator asm_name_opt initializer_opt
1737 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
1738 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1739 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
1740 ;
1741
1742declaration_specifier: // type specifier + storage class
1743 basic_declaration_specifier
1744 | sue_declaration_specifier
1745 | type_declaration_specifier
1746 ;
1747
1748declaration_specifier_nobody: // type specifier + storage class - {...}
1749 // Preclude SUE declarations in restricted scopes:
1750 //
1751 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1752 //
1753 // because it is impossible to call f due to name equivalence.
1754 basic_declaration_specifier
1755 | sue_declaration_specifier_nobody
1756 | type_declaration_specifier
1757 ;
1758
1759type_specifier: // type specifier
1760 basic_type_specifier
1761 | sue_type_specifier
1762 | type_type_specifier
1763 ;
1764
1765type_specifier_nobody: // type specifier - {...}
1766 // Preclude SUE declarations in restricted scopes:
1767 //
1768 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1769 //
1770 // because it is impossible to call f due to name equivalence.
1771 basic_type_specifier
1772 | sue_type_specifier_nobody
1773 | type_type_specifier
1774 ;
1775
1776type_qualifier_list_opt: // GCC, used in asm_statement
1777 // empty
1778 { $$ = nullptr; }
1779 | type_qualifier_list
1780 ;
1781
1782type_qualifier_list:
1783 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1784 //
1785 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1786 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1787 // appeared only once.
1788 type_qualifier
1789 | type_qualifier_list type_qualifier
1790 { $$ = $1->addQualifiers( $2 ); }
1791 ;
1792
1793type_qualifier:
1794 type_qualifier_name
1795 | attribute // trick handles most atrribute locations
1796 ;
1797
1798type_qualifier_name:
1799 CONST
1800 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1801 | RESTRICT
1802 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1803 | VOLATILE
1804 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1805 | ATOMIC
1806 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1807 | forall
1808 ;
1809
1810forall:
1811 FORALL '(' type_parameter_list ')' // CFA
1812 { $$ = DeclarationNode::newForall( $3 ); }
1813 ;
1814
1815declaration_qualifier_list:
1816 storage_class_list
1817 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1818 { $$ = $1->addQualifiers( $2 ); }
1819 | declaration_qualifier_list type_qualifier_list storage_class_list
1820 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1821 ;
1822
1823storage_class_list:
1824 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1825 // only one of each is specified, except for inline, which can appear with the others.
1826 //
1827 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1828 // specifiers in a declaration.
1829 storage_class
1830 | storage_class_list storage_class
1831 { $$ = $1->addQualifiers( $2 ); }
1832 ;
1833
1834storage_class:
1835 EXTERN
1836 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1837 | STATIC
1838 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
1839 | AUTO
1840 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1841 | REGISTER
1842 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
1843 | THREADLOCAL // C11
1844 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1845 // Put function specifiers here to simplify parsing rules, but separate them semantically.
1846 | INLINE // C99
1847 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1848 | FORTRAN // C99
1849 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1850 | NORETURN // C11
1851 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1852 ;
1853
1854basic_type_name:
1855 VOID
1856 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1857 | BOOL // C99
1858 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1859 | CHAR
1860 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1861 | INT
1862 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1863 | INT128
1864 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1865 | UINT128
1866 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ); }
1867 | FLOAT
1868 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1869 | DOUBLE
1870 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1871 | uuFLOAT80
1872 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat80 ); }
1873 | uuFLOAT128
1874 { $$ = DeclarationNode::newBasicType( DeclarationNode::uuFloat128 ); }
1875 | uFLOAT16
1876 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat16 ); }
1877 | uFLOAT32
1878 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32 ); }
1879 | uFLOAT32X
1880 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat32x ); }
1881 | uFLOAT64
1882 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64 ); }
1883 | uFLOAT64X
1884 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat64x ); }
1885 | uFLOAT128
1886 { $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
1887 | COMPLEX // C99
1888 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1889 | IMAGINARY // C99
1890 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1891 | SIGNED
1892 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1893 | UNSIGNED
1894 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1895 | SHORT
1896 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1897 | LONG
1898 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1899 | VALIST // GCC, __builtin_va_list
1900 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1901 | AUTO_TYPE
1902 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::AutoType ); }
1903 | vtable
1904 ;
1905
1906vtable_opt:
1907 // empty
1908 { $$ = nullptr; }
1909 | vtable;
1910 ;
1911
1912vtable:
1913 VTABLE '(' type_list ')' default_opt
1914 { SemanticError( yylloc, "vtable is currently unimplemented." ); $$ = nullptr; }
1915 ;
1916
1917default_opt:
1918 // empty
1919 { $$ = nullptr; }
1920 | DEFAULT
1921 { SemanticError( yylloc, "vtable default is currently unimplemented." ); $$ = nullptr; }
1922 ;
1923
1924basic_declaration_specifier:
1925 // A semantic check is necessary for conflicting storage classes.
1926 basic_type_specifier
1927 | declaration_qualifier_list basic_type_specifier
1928 { $$ = $2->addQualifiers( $1 ); }
1929 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1930 { $$ = $1->addQualifiers( $2 ); }
1931 | basic_declaration_specifier storage_class type_qualifier_list
1932 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1933 | basic_declaration_specifier storage_class basic_type_specifier
1934 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1935 ;
1936
1937basic_type_specifier:
1938 direct_type
1939 // Cannot have type modifiers, e.g., short, long, etc.
1940 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
1941 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1942 ;
1943
1944direct_type:
1945 basic_type_name
1946 | type_qualifier_list basic_type_name
1947 { $$ = $2->addQualifiers( $1 ); }
1948 | direct_type type_qualifier
1949 { $$ = $1->addQualifiers( $2 ); }
1950 | direct_type basic_type_name
1951 { $$ = $1->addType( $2 ); }
1952 ;
1953
1954indirect_type:
1955 TYPEOF '(' type ')' // GCC: typeof( x ) y;
1956 { $$ = $3; }
1957 | TYPEOF '(' comma_expression ')' // GCC: typeof( a+b ) y;
1958 { $$ = DeclarationNode::newTypeof( $3 ); }
1959 | BASETYPEOF '(' type ')' // CFA: basetypeof( x ) y;
1960 { $$ = DeclarationNode::newTypeof( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ), true ); }
1961 | BASETYPEOF '(' comma_expression ')' // CFA: basetypeof( a+b ) y;
1962 { $$ = DeclarationNode::newTypeof( $3, true ); }
1963 | ZERO_T // CFA
1964 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1965 | ONE_T // CFA
1966 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1967 ;
1968
1969sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1970 sue_type_specifier
1971 | declaration_qualifier_list sue_type_specifier
1972 { $$ = $2->addQualifiers( $1 ); }
1973 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1974 { $$ = $1->addQualifiers( $2 ); }
1975 | sue_declaration_specifier storage_class type_qualifier_list
1976 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1977 ;
1978
1979sue_type_specifier: // struct, union, enum + type specifier
1980 elaborated_type
1981 | type_qualifier_list
1982 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1983 elaborated_type
1984 { $$ = $3->addQualifiers( $1 ); }
1985 | sue_type_specifier type_qualifier
1986 {
1987 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
1988 $$ = $1->addQualifiers( $2 );
1989 }
1990 ;
1991
1992sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1993 sue_type_specifier_nobody
1994 | declaration_qualifier_list sue_type_specifier_nobody
1995 { $$ = $2->addQualifiers( $1 ); }
1996 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1997 { $$ = $1->addQualifiers( $2 ); }
1998 | sue_declaration_specifier_nobody storage_class type_qualifier_list
1999 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2000 ;
2001
2002sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
2003 elaborated_type_nobody
2004 | type_qualifier_list elaborated_type_nobody
2005 { $$ = $2->addQualifiers( $1 ); }
2006 | sue_type_specifier_nobody type_qualifier
2007 { $$ = $1->addQualifiers( $2 ); }
2008 ;
2009
2010type_declaration_specifier:
2011 type_type_specifier
2012 | declaration_qualifier_list type_type_specifier
2013 { $$ = $2->addQualifiers( $1 ); }
2014 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
2015 { $$ = $1->addQualifiers( $2 ); }
2016 | type_declaration_specifier storage_class type_qualifier_list
2017 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
2018 ;
2019
2020type_type_specifier: // typedef types
2021 type_name
2022 | type_qualifier_list type_name
2023 { $$ = $2->addQualifiers( $1 ); }
2024 | type_type_specifier type_qualifier
2025 { $$ = $1->addQualifiers( $2 ); }
2026 ;
2027
2028type_name:
2029 TYPEDEFname
2030 { $$ = DeclarationNode::newFromTypedef( $1 ); }
2031 | '.' TYPEDEFname
2032 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), DeclarationNode::newFromTypedef( $2 ) ); }
2033 | type_name '.' TYPEDEFname
2034 { $$ = DeclarationNode::newQualifiedType( $1, DeclarationNode::newFromTypedef( $3 ) ); }
2035 | typegen_name
2036 | '.' typegen_name
2037 { $$ = DeclarationNode::newQualifiedType( DeclarationNode::newFromGlobalScope(), $2 ); }
2038 | type_name '.' typegen_name
2039 { $$ = DeclarationNode::newQualifiedType( $1, $3 ); }
2040 ;
2041
2042typegen_name: // CFA
2043 TYPEGENname
2044 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2045 | TYPEGENname '(' ')'
2046 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
2047 | TYPEGENname '(' type_list ')'
2048 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
2049 ;
2050
2051elaborated_type: // struct, union, enum
2052 aggregate_type
2053 | enum_type
2054 ;
2055
2056elaborated_type_nobody: // struct, union, enum - {...}
2057 aggregate_type_nobody
2058 | enum_type_nobody
2059 ;
2060
2061aggregate_type: // struct, union
2062 aggregate_key attribute_list_opt
2063 { forall = false; } // reset
2064 '{' field_declaration_list_opt '}' type_parameters_opt
2065 { $$ = DeclarationNode::newAggregate( $1, nullptr, $7, $5, true )->addQualifiers( $2 ); }
2066 | aggregate_key attribute_list_opt identifier
2067 {
2068 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2069 forall = false; // reset
2070 }
2071 '{' field_declaration_list_opt '}' type_parameters_opt
2072 { $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 ); }
2073 | aggregate_key attribute_list_opt TYPEDEFname // unqualified type name
2074 {
2075 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2076 forall = false; // reset
2077 }
2078 '{' field_declaration_list_opt '}' type_parameters_opt
2079 {
2080 DeclarationNode::newFromTypedef( $3 );
2081 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2082 }
2083 | aggregate_key attribute_list_opt TYPEGENname // unqualified type name
2084 {
2085 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
2086 forall = false; // reset
2087 }
2088 '{' field_declaration_list_opt '}' type_parameters_opt
2089 {
2090 DeclarationNode::newFromTypeGen( $3, nullptr );
2091 $$ = DeclarationNode::newAggregate( $1, $3, $8, $6, true )->addQualifiers( $2 );
2092 }
2093 | aggregate_type_nobody
2094 ;
2095
2096type_parameters_opt:
2097 // empty
2098 { $$ = nullptr; } %prec '}'
2099 | '(' type_list ')'
2100 { $$ = $2; }
2101 ;
2102
2103aggregate_type_nobody: // struct, union - {...}
2104 aggregate_key attribute_list_opt identifier
2105 {
2106 typedefTable.makeTypedef( *$3, forall || typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname );
2107 forall = false; // reset
2108 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
2109 }
2110 | aggregate_key attribute_list_opt type_name
2111 {
2112 forall = false; // reset
2113 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
2114 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
2115 // delete newFromTypeGen.
2116 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
2117 $3->type->symbolic.name = nullptr;
2118 $3->type->symbolic.actuals = nullptr;
2119 delete $3;
2120 }
2121 ;
2122
2123aggregate_key:
2124 aggregate_data
2125 | aggregate_control
2126 ;
2127
2128aggregate_data:
2129 STRUCT vtable_opt
2130 { yyy = true; $$ = AggregateDecl::Struct; }
2131 | UNION
2132 { yyy = true; $$ = AggregateDecl::Union; }
2133 | EXCEPTION // CFA
2134 { yyy = true; $$ = AggregateDecl::Exception; }
2135 // { SemanticError( yylloc, "exception aggregate is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2136 ;
2137
2138aggregate_control: // CFA
2139 MONITOR
2140 { yyy = true; $$ = AggregateDecl::Monitor; }
2141 | MUTEX STRUCT
2142 { yyy = true; $$ = AggregateDecl::Monitor; }
2143 | GENERATOR
2144 { yyy = true; $$ = AggregateDecl::Generator; }
2145 | MUTEX GENERATOR
2146 { SemanticError( yylloc, "monitor generator is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2147 | COROUTINE
2148 { yyy = true; $$ = AggregateDecl::Coroutine; }
2149 | MUTEX COROUTINE
2150 { SemanticError( yylloc, "monitor coroutine is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2151 | THREAD
2152 { yyy = true; $$ = AggregateDecl::Thread; }
2153 | MUTEX THREAD
2154 { SemanticError( yylloc, "monitor thread is currently unimplemented." ); $$ = AggregateDecl::NoAggregate; }
2155 ;
2156
2157field_declaration_list_opt:
2158 // empty
2159 { $$ = nullptr; }
2160 | field_declaration_list_opt field_declaration
2161 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2162 ;
2163
2164field_declaration:
2165 type_specifier field_declaring_list_opt ';'
2166 { $$ = fieldDecl( $1, $2 ); }
2167 | EXTENSION type_specifier field_declaring_list_opt ';' // GCC
2168 { $$ = fieldDecl( $2, $3 ); distExt( $$ ); }
2169 | INLINE type_specifier field_abstract_list_opt ';' // CFA
2170 {
2171 if ( ! $3 ) { // field declarator ?
2172 $3 = DeclarationNode::newName( nullptr );
2173 } // if
2174 $3->inLine = true;
2175 $$ = distAttr( $2, $3 ); // mark all fields in list
2176 distInl( $3 );
2177 }
2178 | INLINE aggregate_control ';' // CFA
2179 { SemanticError( yylloc, "INLINE aggregate control currently unimplemented." ); $$ = nullptr; }
2180 | typedef_declaration ';' // CFA
2181 | cfa_field_declaring_list ';' // CFA, new style field declaration
2182 | EXTENSION cfa_field_declaring_list ';' // GCC
2183 { distExt( $2 ); $$ = $2; } // mark all fields in list
2184 | INLINE cfa_field_abstract_list ';' // CFA, new style field declaration
2185 { $$ = $2; } // mark all fields in list
2186 | cfa_typedef_declaration ';' // CFA
2187 | static_assert // C11
2188 ;
2189
2190field_declaring_list_opt:
2191 // empty
2192 { $$ = nullptr; }
2193 | field_declarator
2194 | field_declaring_list_opt ',' attribute_list_opt field_declarator
2195 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2196 ;
2197
2198field_declarator:
2199 bit_subrange_size // C special case, no field name
2200 { $$ = DeclarationNode::newBitfield( $1 ); }
2201 | variable_declarator bit_subrange_size_opt
2202 // A semantic check is required to ensure bit_subrange only appears on integral types.
2203 { $$ = $1->addBitfield( $2 ); }
2204 | variable_type_redeclarator bit_subrange_size_opt
2205 // A semantic check is required to ensure bit_subrange only appears on integral types.
2206 { $$ = $1->addBitfield( $2 ); }
2207 ;
2208
2209field_abstract_list_opt:
2210 // empty
2211 { $$ = nullptr; }
2212 | field_abstract
2213 | field_abstract_list_opt ',' attribute_list_opt field_abstract
2214 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
2215 ;
2216
2217field_abstract:
2218 // no bit fields
2219 variable_abstract_declarator
2220 ;
2221
2222cfa_field_declaring_list: // CFA, new style field declaration
2223 // bit-fields are handled by C declarations
2224 cfa_abstract_declarator_tuple identifier_or_type_name
2225 { $$ = $1->addName( $2 ); }
2226 | cfa_field_declaring_list ',' identifier_or_type_name
2227 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
2228 ;
2229
2230cfa_field_abstract_list: // CFA, new style field declaration
2231 // bit-fields are handled by C declarations
2232 cfa_abstract_declarator_tuple
2233 | cfa_field_abstract_list ','
2234 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
2235 ;
2236
2237bit_subrange_size_opt:
2238 // empty
2239 { $$ = nullptr; }
2240 | bit_subrange_size
2241 ;
2242
2243bit_subrange_size:
2244 ':' assignment_expression
2245 { $$ = $2; }
2246 ;
2247
2248enum_type: // enum
2249 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
2250 { $$ = DeclarationNode::newEnum( nullptr, $4, true )->addQualifiers( $2 ); }
2251 | ENUM attribute_list_opt identifier
2252 { typedefTable.makeTypedef( *$3 ); }
2253 '{' enumerator_list comma_opt '}'
2254 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
2255 | ENUM attribute_list_opt typedef_name // unqualified type name
2256 '{' enumerator_list comma_opt '}'
2257 { $$ = DeclarationNode::newEnum( $3->name, $5, true )->addQualifiers( $2 ); }
2258 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt '{' enumerator_list comma_opt '}'
2259 {
2260 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." ); }
2261 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2262 }
2263 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt identifier attribute_list_opt
2264 {
2265 if ( $3->storageClasses.val != 0 || $3->type->qualifiers.val != 0 ) { SemanticError( yylloc, "storage-class and CV qualifiers are not meaningful for enumeration constants, which are const." ); }
2266 typedefTable.makeTypedef( *$6 );
2267 }
2268 '{' enumerator_list comma_opt '}'
2269 {
2270 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2271 }
2272 | ENUM '(' cfa_abstract_parameter_declaration ')' attribute_list_opt typedef_name attribute_list_opt '{' enumerator_list comma_opt '}'
2273 {
2274 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." ); }
2275 typedefTable.makeTypedef( *$6->name );
2276 SemanticError( yylloc, "Typed enumeration is currently unimplemented." ); $$ = nullptr;
2277 }
2278 | enum_type_nobody
2279 ;
2280
2281enum_type_nobody: // enum - {...}
2282 ENUM attribute_list_opt identifier
2283 { typedefTable.makeTypedef( *$3 ); $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 ); }
2284 | ENUM attribute_list_opt type_name // qualified type name
2285 { typedefTable.makeTypedef( *$3->type->symbolic.name ); $$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false )->addQualifiers( $2 ); }
2286 ;
2287
2288enumerator_list:
2289 identifier_or_type_name enumerator_value_opt
2290 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
2291 | INLINE type_name
2292 { $$ = DeclarationNode::newEnumConstant( new string("inline"), nullptr ); }
2293 | enumerator_list ',' identifier_or_type_name enumerator_value_opt
2294 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
2295 | enumerator_list ',' INLINE type_name enumerator_value_opt
2296 { $$ = $1->appendList( DeclarationNode::newEnumConstant( new string("inline"), nullptr ) ); }
2297 ;
2298
2299enumerator_value_opt:
2300 // empty
2301 { $$ = nullptr; }
2302 // | '=' constant_expression
2303 // { $$ = $2; }
2304 | simple_assignment_operator initializer
2305 { $$ = $2->get_expression(); } // FIX ME: enum only deals with constant_expression
2306 ;
2307
2308cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
2309 // empty
2310 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2311 | ELLIPSIS
2312 { $$ = nullptr; }
2313 | cfa_abstract_parameter_list
2314 | cfa_parameter_list
2315 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2316 { $$ = $1->appendList( $5 ); }
2317 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2318 { $$ = $1->addVarArgs(); }
2319 | cfa_parameter_list pop ',' push ELLIPSIS
2320 { $$ = $1->addVarArgs(); }
2321 ;
2322
2323cfa_parameter_list: // CFA
2324 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2325 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2326 cfa_parameter_declaration
2327 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2328 { $$ = $1->appendList( $5 ); }
2329 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2330 { $$ = $1->appendList( $5 ); }
2331 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2332 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2333 ;
2334
2335cfa_abstract_parameter_list: // CFA, new & old style abstract
2336 cfa_abstract_parameter_declaration
2337 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2338 { $$ = $1->appendList( $5 ); }
2339 ;
2340
2341parameter_type_list_opt:
2342 // empty
2343 { $$ = nullptr; }
2344 | ELLIPSIS
2345 { $$ = nullptr; }
2346 | parameter_list
2347 | parameter_list pop ',' push ELLIPSIS
2348 { $$ = $1->addVarArgs(); }
2349 ;
2350
2351parameter_list: // abstract + real
2352 abstract_parameter_declaration
2353 | parameter_declaration
2354 | parameter_list pop ',' push abstract_parameter_declaration
2355 { $$ = $1->appendList( $5 ); }
2356 | parameter_list pop ',' push parameter_declaration
2357 { $$ = $1->appendList( $5 ); }
2358 ;
2359
2360// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2361// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2362
2363cfa_parameter_declaration: // CFA, new & old style parameter declaration
2364 parameter_declaration
2365 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initializer_opt
2366 { $$ = $1->addName( $2 ); }
2367 | cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2368 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2369 { $$ = $1->addName( $2 ); }
2370 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initializer_opt
2371 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2372 | cfa_function_specifier
2373 ;
2374
2375cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2376 abstract_parameter_declaration
2377 | cfa_identifier_parameter_declarator_no_tuple
2378 | cfa_abstract_tuple
2379 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2380 | type_qualifier_list cfa_abstract_tuple
2381 { $$ = $2->addQualifiers( $1 ); }
2382 | cfa_abstract_function
2383 ;
2384
2385parameter_declaration:
2386 // No SUE declaration in parameter list.
2387 declaration_specifier_nobody identifier_parameter_declarator default_initializer_opt
2388 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2389 | declaration_specifier_nobody type_parameter_redeclarator default_initializer_opt
2390 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2391 ;
2392
2393abstract_parameter_declaration:
2394 declaration_specifier_nobody default_initializer_opt
2395 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2396 | declaration_specifier_nobody abstract_parameter_declarator default_initializer_opt
2397 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2398 ;
2399
2400// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2401// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2402// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2403
2404identifier_list: // K&R-style parameter list => no types
2405 identifier
2406 { $$ = DeclarationNode::newName( $1 ); }
2407 | identifier_list ',' identifier
2408 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2409 ;
2410
2411identifier_or_type_name:
2412 identifier
2413 | TYPEDEFname
2414 | TYPEGENname
2415 ;
2416
2417type_no_function: // sizeof, alignof, cast (constructor)
2418 cfa_abstract_declarator_tuple // CFA
2419 | type_specifier
2420 | type_specifier abstract_declarator
2421 { $$ = $2->addType( $1 ); }
2422 ;
2423
2424type: // typeof, assertion
2425 type_no_function
2426 | cfa_abstract_function // CFA
2427 ;
2428
2429initializer_opt:
2430 // empty
2431 { $$ = nullptr; }
2432 | simple_assignment_operator initializer { $$ = $1 == OperKinds::Assign ? $2 : $2->set_maybeConstructed( false ); }
2433 | '=' VOID { $$ = new InitializerNode( true ); }
2434 ;
2435
2436initializer:
2437 assignment_expression { $$ = new InitializerNode( $1 ); }
2438 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2439 ;
2440
2441initializer_list_opt:
2442 // empty
2443 { $$ = nullptr; }
2444 | initializer
2445 | designation initializer { $$ = $2->set_designators( $1 ); }
2446 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2447 | initializer_list_opt ',' designation initializer
2448 { $$ = (InitializerNode *)($1->set_last( $4->set_designators( $3 ) )); }
2449 ;
2450
2451// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2452// '=' to separator the designator from the initializer value, as in:
2453//
2454// int x[10] = { [1] = 3 };
2455//
2456// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2457// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2458// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2459// shift/reduce conflicts
2460
2461designation:
2462 designator_list ':' // C99, CFA uses ":" instead of "="
2463 | identifier ':' // GCC, field name
2464 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2465 ;
2466
2467designator_list: // C99
2468 designator
2469 | designator_list designator
2470 { $$ = (ExpressionNode *)($1->set_last( $2 )); }
2471 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2472 ;
2473
2474designator:
2475 '.' identifier // C99, field name
2476 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2477 | '[' push assignment_expression pop ']' // C99, single array element
2478 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2479 { $$ = $3; }
2480 | '[' push subrange pop ']' // CFA, multiple array elements
2481 { $$ = $3; }
2482 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2483 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $3 ), maybeMoveBuild<Expression>( $5 ) ) ); }
2484 | '.' '[' push field_name_list pop ']' // CFA, tuple field selector
2485 { $$ = $4; }
2486 ;
2487
2488// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2489// rather than an object-oriented type system. This required four groups of extensions:
2490//
2491// Overloading: function, data, and operator identifiers may be overloaded.
2492//
2493// Type declarations: "otype" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2494// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2495// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2496//
2497// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2498// site. A polymorphic function is not a template; it is a function, with an address and a type.
2499//
2500// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2501// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2502// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2503// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2504// on type arguments of polymorphic functions.
2505
2506type_parameter_list: // CFA
2507 type_parameter
2508 | type_parameter_list ',' type_parameter
2509 { $$ = $1->appendList( $3 ); }
2510 ;
2511
2512type_initializer_opt: // CFA
2513 // empty
2514 { $$ = nullptr; }
2515 | '=' type
2516 { $$ = $2; }
2517 ;
2518
2519type_parameter: // CFA
2520 type_class identifier_or_type_name
2521 {
2522 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2523 if ( $1 == TypeDecl::Otype ) { SemanticError( yylloc, "otype keyword is deprecated, use T " ); }
2524 if ( $1 == TypeDecl::Dtype ) { SemanticError( yylloc, "dtype keyword is deprecated, use T &" ); }
2525 if ( $1 == TypeDecl::Ttype ) { SemanticError( yylloc, "ttype keyword is deprecated, use T ..." ); }
2526 }
2527 type_initializer_opt assertion_list_opt
2528 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2529 | identifier_or_type_name new_type_class
2530 { typedefTable.addToScope( *$1, TYPEDEFname, "9" ); }
2531 type_initializer_opt assertion_list_opt
2532 { $$ = DeclarationNode::newTypeParam( $2, $1 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2533 | '[' identifier_or_type_name ']'
2534 {
2535 typedefTable.addToScope( *$2, TYPEDEFname, "9" );
2536 $$ = DeclarationNode::newTypeParam( TypeDecl::ALtype, $2 );
2537 }
2538 // | type_specifier identifier_parameter_declarator
2539 | assertion_list
2540 { $$ = DeclarationNode::newTypeParam( TypeDecl::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
2541 ;
2542
2543new_type_class: // CFA
2544 // empty
2545 { $$ = TypeDecl::Otype; }
2546 | '&'
2547 { $$ = TypeDecl::Dtype; }
2548 | '*'
2549 { $$ = TypeDecl::DStype; } // dtype + sized
2550 | ELLIPSIS
2551 { $$ = TypeDecl::Ttype; }
2552 ;
2553
2554type_class: // CFA
2555 OTYPE
2556 { $$ = TypeDecl::Otype; }
2557 | DTYPE
2558 { $$ = TypeDecl::Dtype; }
2559 | FTYPE
2560 { $$ = TypeDecl::Ftype; }
2561 | TTYPE
2562 { $$ = TypeDecl::Ttype; }
2563 ;
2564
2565assertion_list_opt: // CFA
2566 // empty
2567 { $$ = nullptr; }
2568 | assertion_list
2569 ;
2570
2571assertion_list: // CFA
2572 assertion
2573 | assertion_list assertion
2574 { $$ = $1->appendList( $2 ); }
2575 ;
2576
2577assertion: // CFA
2578 '|' identifier_or_type_name '(' type_list ')'
2579 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
2580 | '|' '{' push trait_declaration_list pop '}'
2581 { $$ = $4; }
2582 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
2583 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
2584 ;
2585
2586type_list: // CFA
2587 type
2588 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2589 | assignment_expression
2590 { SemanticError( yylloc, toString("Expression generic parameters are currently unimplemented: ", $1->build()) ); $$ = nullptr; }
2591 | type_list ',' type
2592 { $$ = (ExpressionNode *)($1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) )); }
2593 | type_list ',' assignment_expression
2594 { SemanticError( yylloc, toString("Expression generic parameters are currently unimplemented: ", $3->build()) ); $$ = nullptr; }
2595 // { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2596 ;
2597
2598type_declaring_list: // CFA
2599 OTYPE type_declarator
2600 { $$ = $2; }
2601 | storage_class_list OTYPE type_declarator
2602 { $$ = $3->addQualifiers( $1 ); }
2603 | type_declaring_list ',' type_declarator
2604 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2605 ;
2606
2607type_declarator: // CFA
2608 type_declarator_name assertion_list_opt
2609 { $$ = $1->addAssertions( $2 ); }
2610 | type_declarator_name assertion_list_opt '=' type
2611 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2612 ;
2613
2614type_declarator_name: // CFA
2615 identifier_or_type_name
2616 {
2617 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
2618 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2619 }
2620 | identifier_or_type_name '(' type_parameter_list ')'
2621 {
2622 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "11" );
2623 $$ = DeclarationNode::newTypeDecl( $1, $3 );
2624 }
2625 ;
2626
2627trait_specifier: // CFA
2628 TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
2629 { $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
2630 | TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
2631 { $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
2632 ;
2633
2634trait_declaration_list: // CFA
2635 trait_declaration
2636 | trait_declaration_list pop push trait_declaration
2637 { $$ = $1->appendList( $4 ); }
2638 ;
2639
2640trait_declaration: // CFA
2641 cfa_trait_declaring_list ';'
2642 | trait_declaring_list ';'
2643 ;
2644
2645cfa_trait_declaring_list: // CFA
2646 cfa_variable_specifier
2647 | cfa_function_specifier
2648 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2649 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
2650 ;
2651
2652trait_declaring_list: // CFA
2653 type_specifier declarator
2654 { $$ = $2->addType( $1 ); }
2655 | trait_declaring_list pop ',' push declarator
2656 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
2657 ;
2658
2659//***************************** EXTERNAL DEFINITIONS *****************************
2660
2661translation_unit:
2662 // empty, input file
2663 | external_definition_list
2664 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2665 ;
2666
2667external_definition_list:
2668 push external_definition pop
2669 { $$ = $2; }
2670 | external_definition_list push external_definition pop
2671 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2672 ;
2673
2674external_definition_list_opt:
2675 // empty
2676 { $$ = nullptr; }
2677 | external_definition_list
2678 ;
2679
2680up:
2681 { typedefTable.up( forall ); forall = false; }
2682 ;
2683
2684down:
2685 { typedefTable.down(); }
2686 ;
2687
2688external_definition:
2689 DIRECTIVE
2690 { $$ = DeclarationNode::newDirectiveStmt( new StatementNode( build_directive( $1 ) ) ); }
2691 | declaration
2692 | external_function_definition
2693 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2694 {
2695 distExt( $2 ); // mark all fields in list
2696 $$ = $2;
2697 }
2698 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2699 { $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) ); }
2700 | EXTERN STRINGliteral // C++-style linkage specifier
2701 {
2702 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2703 linkage = LinkageSpec::update( yylloc, linkage, $2 );
2704 }
2705 '{' up external_definition_list_opt down '}'
2706 {
2707 linkage = linkageStack.top();
2708 linkageStack.pop();
2709 $$ = $6;
2710 }
2711 | type_qualifier_list
2712 {
2713 if ( $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2714 if ( $1->type->forall ) forall = true; // remember generic type
2715 }
2716 '{' up external_definition_list_opt down '}' // CFA, namespace
2717 {
2718 distQual( $5, $1 );
2719 forall = false;
2720 $$ = $5;
2721 }
2722 | declaration_qualifier_list
2723 {
2724 if ( $1->type && $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2725 if ( $1->type && $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 $$ = $5;
2732 }
2733 | declaration_qualifier_list type_qualifier_list
2734 {
2735 if ( ($1->type && $1->type->qualifiers.val) || $2->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
2736 if ( ($1->type && $1->type->forall) || $2->type->forall ) forall = true; // remember generic type
2737 }
2738 '{' up external_definition_list_opt down '}' // CFA, namespace
2739 {
2740 distQual( $6, $1->addQualifiers( $2 ) );
2741 forall = false;
2742 $$ = $6;
2743 }
2744 ;
2745
2746external_function_definition:
2747 function_definition
2748 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2749 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2750 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2751 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2752 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2753 | function_declarator compound_statement
2754 { $$ = $1->addFunctionBody( $2 ); }
2755 | KR_function_declarator KR_parameter_list_opt compound_statement
2756 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
2757 ;
2758
2759with_clause_opt:
2760 // empty
2761 { $$ = nullptr; forall = false; }
2762 | WITH '(' tuple_expression_list ')'
2763 { $$ = $3; forall = false; }
2764 ;
2765
2766function_definition:
2767 cfa_function_declaration with_clause_opt compound_statement // CFA
2768 {
2769 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2770 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
2771 $1->get_last()->addFunctionBody( $3, $2 );
2772 $$ = $1;
2773 }
2774 | declaration_specifier function_declarator with_clause_opt compound_statement
2775 {
2776 rebindForall( $1, $2 );
2777 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2778 }
2779 | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement
2780 {
2781 rebindForall( $1, $2 );
2782 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2783 }
2784 // handles default int return type, OBSOLESCENT (see 1)
2785 | type_qualifier_list function_declarator with_clause_opt compound_statement
2786 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2787 // handles default int return type, OBSOLESCENT (see 1)
2788 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
2789 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
2790 // handles default int return type, OBSOLESCENT (see 1)
2791 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2792 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2793
2794 // Old-style K&R function definition, OBSOLESCENT (see 4)
2795 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2796 {
2797 rebindForall( $1, $2 );
2798 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
2799 }
2800 // handles default int return type, OBSOLESCENT (see 1)
2801 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2802 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2803 // handles default int return type, OBSOLESCENT (see 1)
2804 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2805 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
2806 // handles default int return type, OBSOLESCENT (see 1)
2807 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
2808 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
2809 ;
2810
2811declarator:
2812 variable_declarator
2813 | variable_type_redeclarator
2814 | function_declarator
2815 ;
2816
2817subrange:
2818 constant_expression '~' constant_expression // CFA, integer subrange
2819 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild<Expression>( $1 ), maybeMoveBuild<Expression>( $3 ) ) ); }
2820 ;
2821
2822asm_name_opt: // GCC
2823 // empty
2824 { $$ = nullptr; }
2825 | ASM '(' string_literal ')' attribute_list_opt
2826 {
2827 DeclarationNode * name = new DeclarationNode();
2828 name->asmName = $3;
2829 $$ = name->addQualifiers( $5 );
2830 }
2831 ;
2832
2833attribute_list_opt: // GCC
2834 // empty
2835 { $$ = nullptr; }
2836 | attribute_list
2837 ;
2838
2839attribute_list: // GCC
2840 attribute
2841 | attribute_list attribute
2842 { $$ = $2->addQualifiers( $1 ); }
2843 ;
2844
2845attribute: // GCC
2846 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2847 { $$ = $4; }
2848 ;
2849
2850attribute_name_list: // GCC
2851 attribute_name
2852 | attribute_name_list ',' attribute_name
2853 { $$ = $3->addQualifiers( $1 ); }
2854 ;
2855
2856attribute_name: // GCC
2857 // empty
2858 { $$ = nullptr; }
2859 | attr_name
2860 { $$ = DeclarationNode::newAttribute( $1 ); }
2861 | attr_name '(' argument_expression_list_opt ')'
2862 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
2863 ;
2864
2865attr_name: // GCC
2866 IDENTIFIER
2867 | quasi_keyword
2868 | TYPEDEFname
2869 | TYPEGENname
2870 | FALLTHROUGH
2871 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
2872 | CONST
2873 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2874 ;
2875
2876// ============================================================================
2877// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2878// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2879// in:
2880//
2881// int (*f())[10] { ... };
2882// ... (*f())[3] += 1; // definition mimics usage
2883//
2884// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2885// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2886// ============================================================================
2887
2888// ----------------------------------------------------------------------------
2889// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2890// to define a variable or function prototype, e.g.:
2891//
2892// valid declaration invalid definition
2893// ----------------- ------------------
2894// int f; int f {}
2895// int *f; int *f {}
2896// int f[10]; int f[10] {}
2897// int (*f)(int); int (*f)(int) {}
2898//
2899// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2900// variable_declarator and function_declarator.
2901// ----------------------------------------------------------------------------
2902
2903// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2904// declaring an array of functions versus a pointer to an array of functions.
2905
2906paren_identifier:
2907 identifier
2908 { $$ = DeclarationNode::newName( $1 ); }
2909 | '(' paren_identifier ')' // redundant parenthesis
2910 { $$ = $2; }
2911 ;
2912
2913variable_declarator:
2914 paren_identifier attribute_list_opt
2915 { $$ = $1->addQualifiers( $2 ); }
2916 | variable_ptr
2917 | variable_array attribute_list_opt
2918 { $$ = $1->addQualifiers( $2 ); }
2919 | variable_function attribute_list_opt
2920 { $$ = $1->addQualifiers( $2 ); }
2921 ;
2922
2923variable_ptr:
2924 ptrref_operator variable_declarator
2925 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2926 | ptrref_operator type_qualifier_list variable_declarator
2927 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2928 | '(' variable_ptr ')' attribute_list_opt // redundant parenthesis
2929 { $$ = $2->addQualifiers( $4 ); }
2930 | '(' attribute_list variable_ptr ')' attribute_list_opt // redundant parenthesis
2931 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
2932 ;
2933
2934variable_array:
2935 paren_identifier array_dimension
2936 { $$ = $1->addArray( $2 ); }
2937 | '(' variable_ptr ')' array_dimension
2938 { $$ = $2->addArray( $4 ); }
2939 | '(' attribute_list variable_ptr ')' array_dimension
2940 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
2941 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2942 { $$ = $2->addArray( $4 ); }
2943 | '(' attribute_list variable_array ')' multi_array_dimension // redundant parenthesis
2944 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
2945 | '(' variable_array ')' // redundant parenthesis
2946 { $$ = $2; }
2947 | '(' attribute_list variable_array ')' // redundant parenthesis
2948 { $$ = $3->addQualifiers( $2 ); }
2949 ;
2950
2951variable_function:
2952 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2953 { $$ = $2->addParamList( $6 ); }
2954 | '(' attribute_list variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2955 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
2956 | '(' variable_function ')' // redundant parenthesis
2957 { $$ = $2; }
2958 | '(' attribute_list variable_function ')' // redundant parenthesis
2959 { $$ = $3->addQualifiers( $2 ); }
2960 ;
2961
2962// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2963// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2964// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2965
2966function_declarator:
2967 function_no_ptr attribute_list_opt
2968 { $$ = $1->addQualifiers( $2 ); }
2969 | function_ptr
2970 | function_array attribute_list_opt
2971 { $$ = $1->addQualifiers( $2 ); }
2972 ;
2973
2974function_no_ptr:
2975 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2976 { $$ = $1->addParamList( $4 ); }
2977 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2978 { $$ = $2->addParamList( $6 ); }
2979 | '(' attribute_list function_ptr ')' '(' push parameter_type_list_opt pop ')'
2980 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
2981 | '(' function_no_ptr ')' // redundant parenthesis
2982 { $$ = $2; }
2983 | '(' attribute_list function_no_ptr ')' // redundant parenthesis
2984 { $$ = $3->addQualifiers( $2 ); }
2985 ;
2986
2987function_ptr:
2988 ptrref_operator function_declarator
2989 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2990 | ptrref_operator type_qualifier_list function_declarator
2991 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2992 | '(' function_ptr ')' attribute_list_opt
2993 { $$ = $2->addQualifiers( $4 ); }
2994 | '(' attribute_list function_ptr ')' attribute_list_opt
2995 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
2996 ;
2997
2998function_array:
2999 '(' function_ptr ')' array_dimension
3000 { $$ = $2->addArray( $4 ); }
3001 | '(' attribute_list function_ptr ')' array_dimension
3002 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3003 | '(' function_array ')' multi_array_dimension // redundant parenthesis
3004 { $$ = $2->addArray( $4 ); }
3005 | '(' attribute_list function_array ')' multi_array_dimension // redundant parenthesis
3006 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3007 | '(' function_array ')' // redundant parenthesis
3008 { $$ = $2; }
3009 | '(' attribute_list function_array ')' // redundant parenthesis
3010 { $$ = $3->addQualifiers( $2 ); }
3011 ;
3012
3013// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
3014//
3015// f( a, b, c ) int a, *b, c[]; {}
3016//
3017// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
3018// returning arrays and functions versus pointers to arrays and functions.
3019
3020KR_function_declarator:
3021 KR_function_no_ptr
3022 | KR_function_ptr
3023 | KR_function_array
3024 ;
3025
3026KR_function_no_ptr:
3027 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
3028 { $$ = $1->addIdList( $3 ); }
3029 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3030 { $$ = $2->addParamList( $6 ); }
3031 | '(' attribute_list KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
3032 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3033 | '(' KR_function_no_ptr ')' // redundant parenthesis
3034 { $$ = $2; }
3035 | '(' attribute_list KR_function_no_ptr ')' // redundant parenthesis
3036 { $$ = $3->addQualifiers( $2 ); }
3037 ;
3038
3039KR_function_ptr:
3040 ptrref_operator KR_function_declarator
3041 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3042 | ptrref_operator type_qualifier_list KR_function_declarator
3043 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3044 | '(' KR_function_ptr ')'
3045 { $$ = $2; }
3046 | '(' attribute_list KR_function_ptr ')'
3047 { $$ = $3->addQualifiers( $2 ); }
3048 ;
3049
3050KR_function_array:
3051 '(' KR_function_ptr ')' array_dimension
3052 { $$ = $2->addArray( $4 ); }
3053 | '(' attribute_list KR_function_ptr ')' array_dimension
3054 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3055 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
3056 { $$ = $2->addArray( $4 ); }
3057 | '(' attribute_list KR_function_array ')' multi_array_dimension // redundant parenthesis
3058 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3059 | '(' KR_function_array ')' // redundant parenthesis
3060 { $$ = $2; }
3061 | '(' attribute_list KR_function_array ')' // redundant parenthesis
3062 { $$ = $3->addQualifiers( $2 ); }
3063 ;
3064
3065// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
3066//
3067// typedef int foo;
3068// {
3069// int foo; // redefine typedef name in new scope
3070// }
3071//
3072// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3073// and functions versus pointers to arrays and functions.
3074
3075paren_type:
3076 typedef_name
3077 {
3078 // hide type name in enclosing scope by variable name
3079 typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "ID" );
3080 }
3081 | '(' paren_type ')'
3082 { $$ = $2; }
3083 ;
3084
3085variable_type_redeclarator:
3086 paren_type attribute_list_opt
3087 { $$ = $1->addQualifiers( $2 ); }
3088 | type_ptr
3089 | type_array attribute_list_opt
3090 { $$ = $1->addQualifiers( $2 ); }
3091 | type_function attribute_list_opt
3092 { $$ = $1->addQualifiers( $2 ); }
3093 ;
3094
3095type_ptr:
3096 ptrref_operator variable_type_redeclarator
3097 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3098 | ptrref_operator type_qualifier_list variable_type_redeclarator
3099 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3100 | '(' type_ptr ')' attribute_list_opt // redundant parenthesis
3101 { $$ = $2->addQualifiers( $4 ); }
3102 | '(' attribute_list type_ptr ')' attribute_list_opt // redundant parenthesis
3103 { $$ = $3->addQualifiers( $2 )->addQualifiers( $5 ); }
3104 ;
3105
3106type_array:
3107 paren_type array_dimension
3108 { $$ = $1->addArray( $2 ); }
3109 | '(' type_ptr ')' array_dimension
3110 { $$ = $2->addArray( $4 ); }
3111 | '(' attribute_list type_ptr ')' array_dimension
3112 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3113 | '(' type_array ')' multi_array_dimension // redundant parenthesis
3114 { $$ = $2->addArray( $4 ); }
3115 | '(' attribute_list type_array ')' multi_array_dimension // redundant parenthesis
3116 { $$ = $3->addQualifiers( $2 )->addArray( $5 ); }
3117 | '(' type_array ')' // redundant parenthesis
3118 { $$ = $2; }
3119 | '(' attribute_list type_array ')' // redundant parenthesis
3120 { $$ = $3->addQualifiers( $2 ); }
3121 ;
3122
3123type_function:
3124 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3125 { $$ = $1->addParamList( $4 ); }
3126 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3127 { $$ = $2->addParamList( $6 ); }
3128 | '(' attribute_list type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3129 { $$ = $3->addQualifiers( $2 )->addParamList( $7 ); }
3130 | '(' type_function ')' // redundant parenthesis
3131 { $$ = $2; }
3132 | '(' attribute_list type_function ')' // redundant parenthesis
3133 { $$ = $3->addQualifiers( $2 ); }
3134 ;
3135
3136// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
3137// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
3138// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
3139// pointers to arrays and functions.
3140
3141identifier_parameter_declarator:
3142 paren_identifier attribute_list_opt
3143 { $$ = $1->addQualifiers( $2 ); }
3144 | '&' MUTEX paren_identifier attribute_list_opt
3145 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3146 | identifier_parameter_ptr
3147 | identifier_parameter_array attribute_list_opt
3148 { $$ = $1->addQualifiers( $2 ); }
3149 | identifier_parameter_function attribute_list_opt
3150 { $$ = $1->addQualifiers( $2 ); }
3151 ;
3152
3153identifier_parameter_ptr:
3154 ptrref_operator identifier_parameter_declarator
3155 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3156 | ptrref_operator type_qualifier_list identifier_parameter_declarator
3157 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3158 | '(' identifier_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3159 { $$ = $2->addQualifiers( $4 ); }
3160 ;
3161
3162identifier_parameter_array:
3163 paren_identifier array_parameter_dimension
3164 { $$ = $1->addArray( $2 ); }
3165 | '(' identifier_parameter_ptr ')' array_dimension
3166 { $$ = $2->addArray( $4 ); }
3167 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
3168 { $$ = $2->addArray( $4 ); }
3169 | '(' identifier_parameter_array ')' // redundant parenthesis
3170 { $$ = $2; }
3171 ;
3172
3173identifier_parameter_function:
3174 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3175 { $$ = $1->addParamList( $4 ); }
3176 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3177 { $$ = $2->addParamList( $6 ); }
3178 | '(' identifier_parameter_function ')' // redundant parenthesis
3179 { $$ = $2; }
3180 ;
3181
3182// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
3183// e.g.:
3184//
3185// typedef int foo;
3186// forall( otype T ) struct foo;
3187// int f( int foo ); // redefine typedef name in new scope
3188//
3189// and allows the C99 array options, which can only appear in a parameter list.
3190
3191type_parameter_redeclarator:
3192 typedef_name attribute_list_opt
3193 { $$ = $1->addQualifiers( $2 ); }
3194 | '&' MUTEX typedef_name attribute_list_opt
3195 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
3196 | type_parameter_ptr
3197 | type_parameter_array attribute_list_opt
3198 { $$ = $1->addQualifiers( $2 ); }
3199 | type_parameter_function attribute_list_opt
3200 { $$ = $1->addQualifiers( $2 ); }
3201 ;
3202
3203typedef_name:
3204 TYPEDEFname
3205 { $$ = DeclarationNode::newName( $1 ); }
3206 | TYPEGENname
3207 { $$ = DeclarationNode::newName( $1 ); }
3208 ;
3209
3210type_parameter_ptr:
3211 ptrref_operator type_parameter_redeclarator
3212 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3213 | ptrref_operator type_qualifier_list type_parameter_redeclarator
3214 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3215 | '(' type_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3216 { $$ = $2->addQualifiers( $4 ); }
3217 ;
3218
3219type_parameter_array:
3220 typedef_name array_parameter_dimension
3221 { $$ = $1->addArray( $2 ); }
3222 | '(' type_parameter_ptr ')' array_parameter_dimension
3223 { $$ = $2->addArray( $4 ); }
3224 ;
3225
3226type_parameter_function:
3227 typedef_name '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3228 { $$ = $1->addParamList( $4 ); }
3229 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3230 { $$ = $2->addParamList( $6 ); }
3231 ;
3232
3233// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
3234// which the type applies, e.g.:
3235//
3236// sizeof( int );
3237// sizeof( int * );
3238// sizeof( int [10] );
3239// sizeof( int (*)() );
3240// sizeof( int () );
3241//
3242// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3243// and functions versus pointers to arrays and functions.
3244
3245abstract_declarator:
3246 abstract_ptr
3247 | abstract_array attribute_list_opt
3248 { $$ = $1->addQualifiers( $2 ); }
3249 | abstract_function attribute_list_opt
3250 { $$ = $1->addQualifiers( $2 ); }
3251 ;
3252
3253abstract_ptr:
3254 ptrref_operator
3255 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3256 | ptrref_operator type_qualifier_list
3257 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3258 | ptrref_operator abstract_declarator
3259 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3260 | ptrref_operator type_qualifier_list abstract_declarator
3261 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3262 | '(' abstract_ptr ')' attribute_list_opt
3263 { $$ = $2->addQualifiers( $4 ); }
3264 ;
3265
3266abstract_array:
3267 array_dimension
3268 | '(' abstract_ptr ')' array_dimension
3269 { $$ = $2->addArray( $4 ); }
3270 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
3271 { $$ = $2->addArray( $4 ); }
3272 | '(' abstract_array ')' // redundant parenthesis
3273 { $$ = $2; }
3274 ;
3275
3276abstract_function:
3277 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3278 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3279 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3280 { $$ = $2->addParamList( $6 ); }
3281 | '(' abstract_function ')' // redundant parenthesis
3282 { $$ = $2; }
3283 ;
3284
3285array_dimension:
3286 // Only the first dimension can be empty.
3287 '[' ']'
3288 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3289 | '[' ']' multi_array_dimension
3290 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
3291 | '[' push assignment_expression pop ',' comma_expression ']'
3292 { $$ = DeclarationNode::newArray( $3, 0, false )->addArray( DeclarationNode::newArray( $6, 0, false ) ); }
3293 // { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
3294 | multi_array_dimension
3295 ;
3296
3297multi_array_dimension:
3298 '[' push assignment_expression pop ']'
3299 { $$ = DeclarationNode::newArray( $3, 0, false ); }
3300 | '[' push '*' pop ']' // C99
3301 { $$ = DeclarationNode::newVarArray( 0 ); }
3302 | multi_array_dimension '[' push assignment_expression pop ']'
3303 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
3304 | multi_array_dimension '[' push '*' pop ']' // C99
3305 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
3306 ;
3307
3308// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
3309// identifier to which the type applies, e.g.:
3310//
3311// int f( int ); // not handled here
3312// int f( int * ); // abstract function-prototype parameter; no parameter name specified
3313// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
3314// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
3315//
3316// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
3317// and functions versus pointers to arrays and functions. In addition, the pattern handles the
3318// special meaning of parenthesis around a typedef name:
3319//
3320// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
3321// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
3322// not as redundant parentheses around the identifier."
3323//
3324// For example:
3325//
3326// typedef float T;
3327// int f( int ( T [5] ) ); // see abstract_parameter_declarator
3328// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
3329// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
3330// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
3331//
3332// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
3333// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
3334// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
3335// functions.
3336
3337abstract_parameter_declarator:
3338 abstract_parameter_ptr
3339 | '&' MUTEX attribute_list_opt
3340 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
3341 | abstract_parameter_array attribute_list_opt
3342 { $$ = $1->addQualifiers( $2 ); }
3343 | abstract_parameter_function attribute_list_opt
3344 { $$ = $1->addQualifiers( $2 ); }
3345 ;
3346
3347abstract_parameter_ptr:
3348 ptrref_operator
3349 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3350 | ptrref_operator type_qualifier_list
3351 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3352 | ptrref_operator abstract_parameter_declarator
3353 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3354 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3355 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3356 | '(' abstract_parameter_ptr ')' attribute_list_opt // redundant parenthesis
3357 { $$ = $2->addQualifiers( $4 ); }
3358 ;
3359
3360abstract_parameter_array:
3361 array_parameter_dimension
3362 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3363 { $$ = $2->addArray( $4 ); }
3364 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3365 { $$ = $2->addArray( $4 ); }
3366 | '(' abstract_parameter_array ')' // redundant parenthesis
3367 { $$ = $2; }
3368 ;
3369
3370abstract_parameter_function:
3371 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3372 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3373 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3374 { $$ = $2->addParamList( $6 ); }
3375 | '(' abstract_parameter_function ')' // redundant parenthesis
3376 { $$ = $2; }
3377 ;
3378
3379array_parameter_dimension:
3380 // Only the first dimension can be empty or have qualifiers.
3381 array_parameter_1st_dimension
3382 | array_parameter_1st_dimension multi_array_dimension
3383 { $$ = $1->addArray( $2 ); }
3384 | multi_array_dimension
3385 ;
3386
3387// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3388//
3389// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3390// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3391
3392array_parameter_1st_dimension:
3393 '[' ']'
3394 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3395 // multi_array_dimension handles the '[' '*' ']' case
3396 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3397 { $$ = DeclarationNode::newVarArray( $3 ); }
3398 | '[' push type_qualifier_list pop ']'
3399 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3400 // multi_array_dimension handles the '[' assignment_expression ']' case
3401 | '[' push type_qualifier_list assignment_expression pop ']'
3402 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3403 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3404 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3405 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3406 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3407 ;
3408
3409// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3410//
3411// struct S {
3412// int;
3413// int *;
3414// int [10];
3415// int (*)();
3416// };
3417
3418variable_abstract_declarator:
3419 variable_abstract_ptr
3420 | variable_abstract_array attribute_list_opt
3421 { $$ = $1->addQualifiers( $2 ); }
3422 | variable_abstract_function attribute_list_opt
3423 { $$ = $1->addQualifiers( $2 ); }
3424 ;
3425
3426variable_abstract_ptr:
3427 ptrref_operator
3428 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3429 | ptrref_operator type_qualifier_list
3430 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3431 | ptrref_operator variable_abstract_declarator
3432 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3433 | ptrref_operator type_qualifier_list variable_abstract_declarator
3434 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3435 | '(' variable_abstract_ptr ')' attribute_list_opt // redundant parenthesis
3436 { $$ = $2->addQualifiers( $4 ); }
3437 ;
3438
3439variable_abstract_array:
3440 array_dimension
3441 | '(' variable_abstract_ptr ')' array_dimension
3442 { $$ = $2->addArray( $4 ); }
3443 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3444 { $$ = $2->addArray( $4 ); }
3445 | '(' variable_abstract_array ')' // redundant parenthesis
3446 { $$ = $2; }
3447 ;
3448
3449variable_abstract_function:
3450 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3451 { $$ = $2->addParamList( $6 ); }
3452 | '(' variable_abstract_function ')' // redundant parenthesis
3453 { $$ = $2; }
3454 ;
3455
3456// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3457// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3458
3459cfa_identifier_parameter_declarator_tuple: // CFA
3460 cfa_identifier_parameter_declarator_no_tuple
3461 | cfa_abstract_tuple
3462 | type_qualifier_list cfa_abstract_tuple
3463 { $$ = $2->addQualifiers( $1 ); }
3464 ;
3465
3466cfa_identifier_parameter_declarator_no_tuple: // CFA
3467 cfa_identifier_parameter_ptr
3468 | cfa_identifier_parameter_array
3469 ;
3470
3471cfa_identifier_parameter_ptr: // CFA
3472 // No SUE declaration in parameter list.
3473 ptrref_operator type_specifier_nobody
3474 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3475 | type_qualifier_list ptrref_operator type_specifier_nobody
3476 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3477 | ptrref_operator cfa_abstract_function
3478 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3479 | type_qualifier_list ptrref_operator cfa_abstract_function
3480 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3481 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3482 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3483 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3484 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3485 ;
3486
3487cfa_identifier_parameter_array: // CFA
3488 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3489 // shift/reduce conflict with new-style empty (void) function return type.
3490 '[' ']' type_specifier_nobody
3491 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3492 | cfa_array_parameter_1st_dimension type_specifier_nobody
3493 { $$ = $2->addNewArray( $1 ); }
3494 | '[' ']' multi_array_dimension type_specifier_nobody
3495 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3496 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3497 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3498 | multi_array_dimension type_specifier_nobody
3499 { $$ = $2->addNewArray( $1 ); }
3500
3501 | '[' ']' cfa_identifier_parameter_ptr
3502 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3503 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3504 { $$ = $2->addNewArray( $1 ); }
3505 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3506 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3507 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3508 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3509 | multi_array_dimension cfa_identifier_parameter_ptr
3510 { $$ = $2->addNewArray( $1 ); }
3511 ;
3512
3513cfa_array_parameter_1st_dimension:
3514 '[' push type_qualifier_list '*' pop ']' // remaining C99
3515 { $$ = DeclarationNode::newVarArray( $3 ); }
3516 | '[' push type_qualifier_list assignment_expression pop ']'
3517 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3518 | '[' push declaration_qualifier_list assignment_expression pop ']'
3519 // declaration_qualifier_list must be used because of shift/reduce conflict with
3520 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3521 // appear in this context.
3522 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3523 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3524 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3525 ;
3526
3527// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3528// identifier to which the type applies, e.g.:
3529//
3530// [int] f( int ); // abstract variable parameter; no parameter name specified
3531// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3532//
3533// These rules need LR(3):
3534//
3535// cfa_abstract_tuple identifier_or_type_name
3536// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
3537//
3538// since a function return type can be syntactically identical to a tuple type:
3539//
3540// [int, int] t;
3541// [int, int] f( int );
3542//
3543// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3544// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3545// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3546// duplicated when appearing with cfa_function_specifier.
3547
3548cfa_abstract_declarator_tuple: // CFA
3549 cfa_abstract_tuple
3550 | type_qualifier_list cfa_abstract_tuple
3551 { $$ = $2->addQualifiers( $1 ); }
3552 | cfa_abstract_declarator_no_tuple
3553 ;
3554
3555cfa_abstract_declarator_no_tuple: // CFA
3556 cfa_abstract_ptr
3557 | cfa_abstract_array
3558 ;
3559
3560cfa_abstract_ptr: // CFA
3561 ptrref_operator type_specifier
3562 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3563 | type_qualifier_list ptrref_operator type_specifier
3564 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3565 | ptrref_operator cfa_abstract_function
3566 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3567 | type_qualifier_list ptrref_operator cfa_abstract_function
3568 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3569 | ptrref_operator cfa_abstract_declarator_tuple
3570 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3571 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3572 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3573 ;
3574
3575cfa_abstract_array: // CFA
3576 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3577 // empty (void) function return type.
3578 '[' ']' type_specifier
3579 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3580 | '[' ']' multi_array_dimension type_specifier
3581 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3582 | multi_array_dimension type_specifier
3583 { $$ = $2->addNewArray( $1 ); }
3584 | '[' ']' cfa_abstract_ptr
3585 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3586 | '[' ']' multi_array_dimension cfa_abstract_ptr
3587 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3588 | multi_array_dimension cfa_abstract_ptr
3589 { $$ = $2->addNewArray( $1 ); }
3590 ;
3591
3592cfa_abstract_tuple: // CFA
3593 '[' push cfa_abstract_parameter_list pop ']'
3594 { $$ = DeclarationNode::newTuple( $3 ); }
3595 | '[' push type_specifier_nobody ELLIPSIS pop ']'
3596 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3597 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
3598 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
3599 ;
3600
3601cfa_abstract_function: // CFA
3602// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
3603// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3604 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
3605 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3606 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
3607 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3608 ;
3609
3610// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3611// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3612//
3613// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3614// the declaration specifiers in a declaration is an obsolescent feature."
3615//
3616// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3617// prototype-format parameter type declarators) is an obsolescent feature."
3618//
3619// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3620// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3621
3622//************************* MISCELLANEOUS ********************************
3623
3624comma_opt: // redundant comma
3625 // empty
3626 | ','
3627 ;
3628
3629default_initializer_opt:
3630 // empty
3631 { $$ = nullptr; }
3632 | '=' assignment_expression
3633 { $$ = $2; }
3634 ;
3635
3636%%
3637
3638// ----end of grammar----
3639
3640// Local Variables: //
3641// mode: c++ //
3642// tab-width: 4 //
3643// compile-command: "make install" //
3644// End: //
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