source: src/Parser/parser.yy@ fc20514

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr no_list persistent-indexer pthread-emulation qualifiedEnum stuck-waitfor-destruct
Last change on this file since fc20514 was fc20514, checked in by Peter A. Buhr <pabuhr@…>, 8 years ago

fix distribution to put type names at correct scopes

  • Property mode set to 100644
File size: 126.0 KB
RevLine 
[b87a5ed]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//
[9335ecc]7// parser.yy --
[974906e2]8//
[c11e31c]9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
[936e9f4]11// Last Modified By : Peter A. Buhr
[fc20514]12// Last Modified On : Wed Jul 11 11:20:51 2018
13// Update Count : 3738
[974906e2]14//
[c11e31c]15
[de62360d]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.
[c11e31c]22
[de62360d]23// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24// the grammar.
[c11e31c]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//
[de62360d]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:
[c11e31c]32//
[e7aed49]33// 1. designation with and without '=' (use ':' instead)
[c0aa336]34// 2. attributes not allowed in parenthesis of declarator
[c11e31c]35//
[de62360d]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.
[51b73452]41
42%{
[b87a5ed]43#define YYDEBUG_LEXER_TEXT (yylval) // lexer loads this up each time
44#define YYDEBUG 1 // get the pretty debugging code to compile
[201aeb9]45#define YYERROR_VERBOSE // more information in syntax errors
[51b73452]46
47#undef __GNUC_MINOR__
48
49#include <cstdio>
50#include <stack>
[9ed4f94]51using namespace std;
52
[51b73452]53#include "ParseNode.h"
[984dce6]54#include "TypedefTable.h"
[1db21619]55#include "TypeData.h"
[51b73452]56#include "LinkageSpec.h"
[9ed4f94]57#include "Common/SemanticError.h" // error_str
[513e165]58#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
[51b73452]59
[cbaee0d]60extern DeclarationNode * parseTree;
[8b7ee09]61extern LinkageSpec::Spec linkage;
[0da3e2c]62extern TypedefTable typedefTable;
63
[2298f728]64stack< LinkageSpec::Spec > linkageStack;
[7bf7fb9]65
[15697ff]66bool appendStr( string & to, string & from ) {
67 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
[ea0c5e3]68 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
[15697ff]69 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
70 // easier to let the C compiler handle this case.
71 //
72 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
73 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
74 // i.e., u"a" U"b" L"c" is disallowed.
75
76 if ( from[0] != '"' ) { // encoding ?
77 if ( to[0] != '"' ) { // encoding ?
[ea0c5e3]78 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
[15697ff]79 yyerror( "non-matching string encodings for string-literal concatenation" );
80 return false; // parse error, must call YYERROR in action
[ea0c5e3]81 } else if ( from[1] == '8' ) {
82 from.erase( 0, 1 ); // remove 2nd encoding
[15697ff]83 } // if
84 } else {
[ea0c5e3]85 if ( from[1] == '8' ) { // move encoding to start
86 to = "u8" + to;
87 from.erase( 0, 1 ); // remove 2nd encoding
88 } else {
89 to = from[0] + to;
90 } // if
[15697ff]91 } // if
92 from.erase( 0, 1 ); // remove 2nd encoding
93 } // if
94 to += " " + from; // concatenated into single string
95 return true;
[7bf7fb9]96} // appendStr
[c0aa336]97
98DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) {
99 // distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__.
100 DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( specifier );
101 //cur->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// delete cl;
107 return declList;
108} // distAttr
109
110void distExt( DeclarationNode * declaration ) {
111 // distribute EXTENSION across all declarations
112 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
113 iter->set_extension( true );
114 } // for
115} // distExt
[fdca7c6]116
[4c3ee8d]117void distQual( DeclarationNode * declaration, DeclarationNode * qualifiers ) {
[284da8c]118 // distribute qualifiers across all non-variable declarations in a distribution statemement
[4c3ee8d]119 for ( DeclarationNode * iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
[284da8c]120 // SKULLDUGGERY: Distributions are parsed inside out, so qualifiers are added to declarations inside out. Since
121 // addQualifiers appends to the back of the list, the forall clauses are in the wrong order (right to left). To
122 // get the qualifiers in the correct order and still use addQualifiers (otherwise, 90% of addQualifiers has to
123 // be copied to add to front), the appropriate forall pointers are interchanged before calling addQualifiers.
124 DeclarationNode * clone = qualifiers->clone();
125 if ( qualifiers->type ) { // forall clause ? (handles SC)
126 if ( iter->type->kind == TypeData::Aggregate ) { // struct/union ?
127 swap( clone->type->forall, iter->type->aggregate.params );
128 iter->addQualifiers( clone );
129 } else if ( iter->type->kind == TypeData::AggregateInst && iter->type->aggInst.aggregate->aggregate.body ) { // struct/union ?
130 // Create temporary node to hold aggregate, call addQualifiers as above, then put nodes back together.
131 DeclarationNode newnode;
132 swap( newnode.type, iter->type->aggInst.aggregate );
133 swap( clone->type->forall, newnode.type->aggregate.params );
134 newnode.addQualifiers( clone );
135 swap( newnode.type, iter->type->aggInst.aggregate );
136 } else if ( iter->type->kind == TypeData::Function ) { // routines ?
137 swap( clone->type->forall, iter->type->forall );
138 iter->addQualifiers( clone );
139 } // if
140 } else { // just SC qualifiers
141 iter->addQualifiers( clone );
142 } // if
[4c3ee8d]143 } // for
[284da8c]144 delete qualifiers;
145} // distQual
[4c3ee8d]146
[c38ae92]147// There is an ambiguity for inline generic-routine return-types and generic routines.
148// forall( otype T ) struct S { int i; } bar( T ) {}
149// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
150// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
[7fdb94e1]151// Currently, the forall is associated with the routine, and the generic type has to be separately defined:
152// forall( otype T ) struct S { int T; };
153// forall( otype W ) bar( W ) {}
[c38ae92]154
155void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
[7fdb94e1]156 if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition
[c38ae92]157 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
158 declSpec->type->aggregate.params = nullptr;
159 } // if
160} // rebindForall
161
[dc7db63]162NameExpr * build_postfix_name( const string * name ) {
163 NameExpr * new_name = build_varref( new string( "?`" + *name ) );
164 delete name;
165 return new_name;
166} // build_postfix_name
167
[fc20514]168bool forall = false, yyy = false; // aggregate have one or more forall qualifiers ?
[d48e529]169
[201aeb9]170// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
171#define YYLLOC_DEFAULT(Cur, Rhs, N) \
172if ( N ) { \
173 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
174 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
175 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
176 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
177 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
178} else { \
179 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
180 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
181 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
182}
[51b73452]183%}
184
[15697ff]185%define parse.error verbose
186
[201aeb9]187// Types declaration for productions
[a67b60e]188%union
189{
190 Token tok;
191 ParseNode * pn;
192 ExpressionNode * en;
193 DeclarationNode * decl;
194 DeclarationNode::Aggregate aggKey;
195 DeclarationNode::TypeClass tclass;
196 StatementNode * sn;
[135b431]197 WaitForStmt * wfs;
[e612146c]198 Expression * constant;
[936e9f4]199 IfCtl * ifctl;
[a67b60e]200 ForCtl * fctl;
201 LabelNode * label;
202 InitializerNode * in;
203 OperKinds op;
204 std::string * str;
205 bool flag;
[307a732]206 CatchStmt::Kind catch_kind;
[d807ca28]207 GenericExpr * genexpr;
[a67b60e]208}
209
[c11e31c]210//************************* TERMINAL TOKENS ********************************
[51b73452]211
[c11e31c]212// keywords
[51b73452]213%token TYPEDEF
[a7c90d4]214%token EXTERN STATIC AUTO REGISTER
215%token THREADLOCAL // C11
216%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
217%token NORETURN // C11
[51b73452]218%token CONST VOLATILE
[b87a5ed]219%token RESTRICT // C99
[a7c90d4]220%token ATOMIC // C11
[51d6d6a]221%token FORALL MUTEX VIRTUAL // CFA
[72457b6]222%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
[b87a5ed]223%token BOOL COMPLEX IMAGINARY // C99
[201aeb9]224%token INT128 FLOAT80 FLOAT128 // GCC
[72457b6]225%token ZERO_T ONE_T // CFA
226%token VALIST // GCC
[b87a5ed]227%token TYPEOF LABEL // GCC
[51b73452]228%token ENUM STRUCT UNION
[c27fb59]229%token EXCEPTION // CFA
[d3bc0ad]230%token COROUTINE MONITOR THREAD // CFA
[a7c90d4]231%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
[5721a6d]232%token SIZEOF OFFSETOF
[b87a5ed]233%token ATTRIBUTE EXTENSION // GCC
[51b73452]234%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
[114014c]235%token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA
[b87a5ed]236%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
[a7c90d4]237%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
[51b73452]238
[c11e31c]239// names and constants: lexer differentiates between identifier and typedef names
[b87a5ed]240%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
[5b2edbc]241%token<tok> TIMEOUT WOR
[b87a5ed]242%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
[1b29996]243%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
[61fc4f6]244%token<tok> DIRECTIVE
[1b29996]245// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
246// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
247// converted into the tuple index (.)(1). e.g., 3.x
[930f69e]248%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
[51b73452]249
[c11e31c]250// multi-character operators
[b87a5ed]251%token ARROW // ->
252%token ICR DECR // ++ --
253%token LS RS // << >>
254%token LE GE EQ NE // <= >= == !=
255%token ANDAND OROR // && ||
256%token ELLIPSIS // ...
257
[e5f2a67]258%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
[b87a5ed]259%token PLUSassign MINUSassign // += -=
260%token LSassign RSassign // <<= >>=
261%token ANDassign ERassign ORassign // &= ^= |=
[51b73452]262
[e7aed49]263%token ATassign // @=
[097e2b0]264
[6165ce7]265%type<tok> identifier no_attr_identifier
[84d58c5]266%type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name
[5b2edbc]267%type<tok> quasi_keyword
[ab57786]268%type<constant> string_literal
269%type<str> string_literal_list
[51b73452]270
[c11e31c]271// expressions
[d1625f8]272%type<en> constant
[b87a5ed]273%type<en> tuple tuple_expression_list
[9706554]274%type<op> ptrref_operator unary_operator assignment_operator
[b87a5ed]275%type<en> primary_expression postfix_expression unary_expression
[994d080]276%type<en> cast_expression exponential_expression multiplicative_expression additive_expression
277%type<en> shift_expression relational_expression equality_expression
278%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
279%type<en> logical_AND_expression logical_OR_expression
280%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
[b87a5ed]281%type<en> comma_expression comma_expression_opt
[994d080]282%type<en> argument_expression_list argument_expression default_initialize_opt
[936e9f4]283%type<ifctl> if_control_expression
[2f22cc4]284%type<fctl> for_control_expression
[51b73452]285%type<en> subrange
[c0aa336]286%type<decl> asm_name_opt
[7f5566b]287%type<en> asm_operands_opt asm_operands_list asm_operand
288%type<label> label_list
[d1625f8]289%type<en> asm_clobbers_list_opt
[7f5566b]290%type<flag> asm_volatile_opt
[cbce272]291%type<en> handler_predicate_opt
[d807ca28]292%type<genexpr> generic_association generic_assoc_list
[51b73452]293
[c11e31c]294// statements
[9bd6105]295%type<sn> statement labeled_statement compound_statement
296%type<sn> statement_decl statement_decl_list statement_list_nodecl
[3d26610]297%type<sn> selection_statement if_statement
[6a276a0]298%type<sn> switch_clause_list_opt switch_clause_list
[9bd6105]299%type<en> case_value
300%type<sn> case_clause case_value_list case_label case_label_list
[8b47e50]301%type<sn> iteration_statement jump_statement
[9bd6105]302%type<sn> expression_statement asm_statement
[c453ac4]303%type<sn> with_statement
304%type<en> with_clause_opt
[51d6d6a]305%type<sn> exception_statement handler_clause finally_clause
306%type<catch_kind> handler_key
[b6b3c42]307%type<sn> mutex_statement
[9bd6105]308%type<en> when_clause when_clause_opt waitfor timeout
[135b431]309%type<sn> waitfor_statement
[51d6d6a]310%type<wfs> waitfor_clause
[51b73452]311
[c11e31c]312// declarations
[c0aa336]313%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
314%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
315%type<decl> abstract_parameter_declaration
[51b73452]316
317%type<aggKey> aggregate_key
[d0ffed1]318%type<decl> aggregate_type aggregate_type_nobody
[51b73452]319
[9997fee]320%type<decl> assertion assertion_list assertion_list_opt
[51b73452]321
322%type<en> bit_subrange_size_opt bit_subrange_size
323
[84d58c5]324%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
[51b73452]325
[4040425]326%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
[51b73452]327
328%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
[d0ffed1]329%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
[51b73452]330
[d0ffed1]331%type<decl> elaborated_type elaborated_type_nobody
[51b73452]332
[d0ffed1]333%type<decl> enumerator_list enum_type enum_type_nobody
[51b73452]334%type<en> enumerator_value_opt
335
[3d56d15b]336%type<decl> external_definition external_definition_list external_definition_list_opt
337
338%type<decl> exception_declaration
[51b73452]339
[7fdb94e1]340%type<decl> field_declaration field_declaration_list_opt field_declarator_opt field_declaring_list
[df22130]341%type<en> field field_list field_name fraction_constants_opt
[51b73452]342
[4d51835]343%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
[51b73452]344
[d3bc0ad]345%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
346%type<decl> identifier_list
[51b73452]347
[c0aa336]348%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
349%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
350%type<decl> cfa_abstract_ptr cfa_abstract_tuple
[51b73452]351
[c0aa336]352%type<decl> cfa_array_parameter_1st_dimension
[51b73452]353
[c0aa336]354%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
355%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
[51b73452]356
[c0aa336]357%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
358%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
[51b73452]359
[40de461]360%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_ellipsis_list_opt
[51b73452]361
[c0aa336]362%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
[51b73452]363
[b9be000b]364%type<decl> c_declaration static_assert
[c0aa336]365%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
[35718a9]366%type<decl> KR_parameter_list KR_parameter_list_opt
[51b73452]367
[2a8427c6]368%type<decl> parameter_declaration parameter_list parameter_type_list_opt
[51b73452]369
[2871210]370%type<decl> paren_identifier paren_type
[51b73452]371
[0da3e2c]372%type<decl> storage_class storage_class_list
[51b73452]373
[d0ffed1]374%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
[51b73452]375
376%type<tclass> type_class
377%type<decl> type_declarator type_declarator_name type_declaring_list
378
[84d58c5]379%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
380%type<decl> typedef typedef_declaration typedef_expression
[c0aa336]381
382%type<decl> variable_type_redeclarator type_ptr type_array type_function
383
384%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
[51b73452]385
[84d58c5]386%type<decl> type type_no_function
387%type<decl> type_parameter type_parameter_list type_initializer_opt
[51b73452]388
[284da8c]389%type<en> type_parameters_opt type_list
[51b73452]390
[a16a7ec]391%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
[d3bc0ad]392%type<decl> type_specifier type_specifier_nobody
[51b73452]393
[c0aa336]394%type<decl> variable_declarator variable_ptr variable_array variable_function
395%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
[51b73452]396
[44a81853]397%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
[1db21619]398
[c11e31c]399// initializers
[7fdb94e1]400%type<in> initializer initializer_list_opt initializer_opt
[51b73452]401
[c11e31c]402// designators
[51b73452]403%type<en> designator designator_list designation
404
405
[65d6de4]406// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
407// .---------. matches IF '(' comma_expression ')' statement . (reduce)
408// if ( C ) S1 else S2
409// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
[5b2edbc]410// Similar issues exit with the waitfor statement.
[51b73452]411
[1efa1e1]412// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
413// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
[5b2edbc]414%precedence THEN // rule precedence for IF/WAITFOR statement
415%precedence WOR // token precedence for start of WOR in WAITFOR statement
416%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
417%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
[51b73452]418
[65d6de4]419// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
420// forall( otype T ) struct Foo { T v; };
421// .-----. matches pointer to function returning a generic (which is impossible without a type)
422// Foo ( *fp )( int );
423// `---' matches start of TYPEGENname '('
[fc20514]424// must be:
[a16a7ec]425// Foo( int ) ( *fp )( int );
[fc20514]426// The same problem occurs here:
427// forall( otype T ) struct Foo { T v; } ( *fp )( int );
428// must be:
429// forall( otype T ) struct Foo { T v; } ( int ) ( *fp )( int );
[65d6de4]430
431// Order of these lines matters (low-to-high precedence).
432%precedence TYPEGENname
[284da8c]433%precedence '}'
[65d6de4]434%precedence '('
435
[f38e7d7]436%locations // support location tracking for error messages
[930f69e]437
[b87a5ed]438%start translation_unit // parse-tree root
[51b73452]439
440%%
[c11e31c]441//************************* Namespace Management ********************************
442
[3d26610]443// The C grammar is not context free because it relies on the distinct terminal symbols "identifier" and "TYPEDEFname",
444// which are lexically identical.
[c11e31c]445//
[3d26610]446// typedef int foo; // identifier foo must now be scanned as TYPEDEFname
447// foo f; // to allow it to appear in this context
[c11e31c]448//
[3d26610]449// While it may be possible to write a purely context-free grammar, such a grammar would obscure the relationship
450// between syntactic and semantic constructs. Cforall compounds this problem by introducing type names local to the
451// scope of a declaration (for instance, those introduced through "forall" qualifiers), and by introducing "type
452// generators" -- parameterized types. This latter type name creates a third class of identifiers, "TYPEGENname", which
453// must be distinguished by the lexical scanner.
[c11e31c]454//
[3d26610]455// Since the scanner cannot distinguish among the different classes of identifiers without some context information,
456// there is a type table (typedefTable), which holds type names and identifiers that override type names, for each named
457// scope. During parsing, semantic actions update the type table by adding new identifiers in the current scope. For
458// each context that introduces a name scope, a new level is created in the type table and that level is popped on
459// exiting the scope. Since type names can be local to a particular declaration, each declaration is itself a scope.
460// This requires distinguishing between type names that are local to the current declaration scope and those that
461// persist past the end of the declaration (i.e., names defined in "typedef" or "otype" declarations).
[c11e31c]462//
[3d26610]463// The non-terminals "push" and "pop" denote the opening and closing of named scopes. Every push has a matching pop in
464// the production rule. There are multiple lists of declarations, where each declaration is a named scope, so pop/push
465// around the list separator.
466//
467// int f( forall(T) T (*f1) T , forall( S ) S (*f2)( S ) );
468// push pop push pop
[51b73452]469
470push:
[ab57786]471 { typedefTable.enterScope(); }
[4d51835]472 ;
[51b73452]473
474pop:
[ab57786]475 { typedefTable.leaveScope(); }
[4d51835]476 ;
[51b73452]477
[c11e31c]478//************************* CONSTANTS ********************************
[51b73452]479
480constant:
[de62360d]481 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
[ab57786]482 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
[930f69e]483 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
484 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
[ab57786]485 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
486 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
[4d51835]487 ;
[51b73452]488
[5b2edbc]489quasi_keyword: // CFA
490 TIMEOUT
491 | WOR
492 ;
493
[51b73452]494identifier:
[4d51835]495 IDENTIFIER
496 | ATTR_IDENTIFIER // CFA
[5b2edbc]497 | quasi_keyword
[4d51835]498 ;
[51b73452]499
500no_attr_identifier:
[4d51835]501 IDENTIFIER
[5b2edbc]502 | quasi_keyword
[4d51835]503 ;
[51b73452]504
[ab57786]505string_literal:
506 string_literal_list { $$ = build_constantStr( *$1 ); }
507 ;
508
[b87a5ed]509string_literal_list: // juxtaposed strings are concatenated
[ab57786]510 STRINGliteral { $$ = $1; } // conversion from tok to str
[7bf7fb9]511 | string_literal_list STRINGliteral
512 {
[15697ff]513 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
[7bf7fb9]514 delete $2; // allocated by lexer
[ab57786]515 $$ = $1; // conversion from tok to str
[7bf7fb9]516 }
[4d51835]517 ;
[51b73452]518
[c11e31c]519//************************* EXPRESSIONS ********************************
[51b73452]520
521primary_expression:
[4d51835]522 IDENTIFIER // typedef name cannot be used as a variable name
[d1625f8]523 { $$ = new ExpressionNode( build_varref( $1 ) ); }
[5b2edbc]524 | quasi_keyword
525 { $$ = new ExpressionNode( build_varref( $1 ) ); }
[1b29996]526 | tuple
[4d51835]527 | '(' comma_expression ')'
528 { $$ = $2; }
529 | '(' compound_statement ')' // GCC, lambda expression
[513e165]530 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); }
[7e419e7]531 | constant '`' IDENTIFIER // CFA, postfix call
[dc7db63]532 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); }
[7e419e7]533 | string_literal '`' IDENTIFIER // CFA, postfix call
[dc7db63]534 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( $1 ) ) ); }
[7e419e7]535 | IDENTIFIER '`' IDENTIFIER // CFA, postfix call
[dc7db63]536 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( build_varref( $1 ) ) ) ); }
[7e419e7]537 | tuple '`' IDENTIFIER // CFA, postfix call
[dc7db63]538 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); }
[7e419e7]539 | '(' comma_expression ')' '`' IDENTIFIER // CFA, postfix call
[dc7db63]540 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $5 ) ), $2 ) ); }
[84d58c5]541 | type_name '.' no_attr_identifier // CFA, nested type
[203c667]542 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[7fdb94e1]543 | type_name '.' '[' field_list ']' // CFA, nested type / tuple field selector
[203c667]544 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[24c3b67]545 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
[d807ca28]546 {
547 // add the missing control expression to the GenericExpr and return it
548 $5->control = maybeMoveBuild<Expression>( $3 );
549 $$ = new ExpressionNode( $5 );
550 }
[24c3b67]551 ;
552
553generic_assoc_list: // C11
[d807ca28]554 generic_association
[24c3b67]555 | generic_assoc_list ',' generic_association
[d807ca28]556 {
557 // steal the association node from the singleton and delete the wrapper
558 $1->associations.splice($1->associations.end(), $3->associations);
559 delete $3;
560 $$ = $1;
561 }
[24c3b67]562 ;
563
564generic_association: // C11
565 type_no_function ':' assignment_expression
[d807ca28]566 {
567 // create a GenericExpr wrapper with one association pair
568 $$ = new GenericExpr( nullptr, { { maybeMoveBuildType($1), maybeMoveBuild<Expression>($3) } } );
569 }
[24c3b67]570 | DEFAULT ':' assignment_expression
[d807ca28]571 { $$ = new GenericExpr( nullptr, { { maybeMoveBuild<Expression>($3) } } ); }
[4d51835]572 ;
[51b73452]573
574postfix_expression:
[4d51835]575 primary_expression
[7fdb94e1]576 | postfix_expression '[' assignment_expression ']'
[c6b1105]577 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
[de62360d]578 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
579 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
580 // equivalent to the old x[i,j].
[7fdb94e1]581 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); }
[bd3d9e4]582 | postfix_expression '{' argument_expression_list '}' // CFA, constructor call
583 {
584 Token fn;
585 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
586 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
587 }
[4d51835]588 | postfix_expression '(' argument_expression_list ')'
[d1625f8]589 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
[4d51835]590 | postfix_expression '.' no_attr_identifier
[d1625f8]591 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
[df22130]592 | postfix_expression '.' INTEGERconstant // CFA, tuple index
593 { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); }
[930f69e]594 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
595 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
[7fdb94e1]596 | postfix_expression '.' '[' field_list ']' // CFA, tuple field selector
597 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
[4d51835]598 | postfix_expression ARROW no_attr_identifier
[861799c7]599 {
600 $$ = new ExpressionNode( build_pfieldSel( $1, *$3 == "0" || *$3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) );
601 }
602 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
603 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
[7fdb94e1]604 | postfix_expression ARROW '[' field_list ']' // CFA, tuple field selector
605 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
[4d51835]606 | postfix_expression ICR
[d1625f8]607 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
[4d51835]608 | postfix_expression DECR
[d1625f8]609 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
[7fdb94e1]610 | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal
[d1625f8]611 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
[7fdb94e1]612 | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal
[f810e09]613 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
[ecb27a7]614 | '^' primary_expression '{' argument_expression_list '}' // CFA
[097e2b0]615 {
[9706554]616 Token fn;
[ecb27a7]617 fn.str = new string( "^?{}" ); // location undefined
618 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
[097e2b0]619 }
[4d51835]620 ;
[51b73452]621
622argument_expression_list:
[4d51835]623 argument_expression
624 | argument_expression_list ',' argument_expression
[1d4580a]625 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
[4d51835]626 ;
[51b73452]627
628argument_expression:
[4d51835]629 // empty
[738e304]630 { $$ = nullptr; }
631 // | '@' // use default argument
632 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
[4d51835]633 | assignment_expression
634 ;
[b87a5ed]635
636field_list: // CFA, tuple field selector
[4d51835]637 field
[1d4580a]638 | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
[4d51835]639 ;
[b87a5ed]640
641field: // CFA, tuple field selector
[faddbd8]642 field_name
[930f69e]643 | FLOATING_DECIMALconstant field
644 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
[7fdb94e1]645 | FLOATING_DECIMALconstant '[' field_list ']'
646 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); }
[faddbd8]647 | field_name '.' field
[bf32bb8]648 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
[7fdb94e1]649 | field_name '.' '[' field_list ']'
650 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); }
[faddbd8]651 | field_name ARROW field
[bf32bb8]652 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
[7fdb94e1]653 | field_name ARROW '[' field_list ']'
654 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); }
[4d51835]655 ;
[51b73452]656
[faddbd8]657field_name:
[df22130]658 INTEGERconstant fraction_constants_opt
[8780e30]659 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
[df22130]660 | FLOATINGconstant fraction_constants_opt
[8780e30]661 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
[df22130]662 | no_attr_identifier fraction_constants_opt
[4cb935e]663 {
[84d58c5]664 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
665 }
[1b29996]666 ;
667
[df22130]668fraction_constants_opt:
[1b29996]669 // empty
[8780e30]670 { $$ = nullptr; }
[df22130]671 | fraction_constants_opt FLOATING_FRACTIONconstant
[8780e30]672 {
[930f69e]673 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
[8780e30]674 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
675 }
[faddbd8]676 ;
677
[51b73452]678unary_expression:
[4d51835]679 postfix_expression
[c6b1105]680 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
681 // semantics checks, e.g., ++3, 3--, *3, &&3
[51b1202]682 | constant
[ab57786]683 | string_literal
[d1625f8]684 { $$ = new ExpressionNode( $1 ); }
[4d51835]685 | EXTENSION cast_expression // GCC
[e04ef3a]686 { $$ = $2->set_extension( true ); }
[c6b1105]687 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
688 // { * X; } // dereference X
689 // { * int X; } // CFA declaration of pointer to int
[51e076e]690 | ptrref_operator cast_expression // CFA
[9706554]691 {
692 switch ( $1 ) {
[d9e2280]693 case OperKinds::AddressOf:
[db70fe4]694 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) );
[9706554]695 break;
[d9e2280]696 case OperKinds::PointTo:
[d1625f8]697 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
[9706554]698 break;
[5809461]699 case OperKinds::And:
[db70fe4]700 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ) );
[5809461]701 break;
[9706554]702 default:
703 assert( false );
704 }
705 }
[4d51835]706 | unary_operator cast_expression
[d1625f8]707 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
[dd51906]708 | ICR unary_expression
[d1625f8]709 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
[dd51906]710 | DECR unary_expression
[d1625f8]711 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
[4d51835]712 | SIZEOF unary_expression
[db70fe4]713 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
[84d58c5]714 | SIZEOF '(' type_no_function ')'
[db70fe4]715 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
[d1625f8]716 | ALIGNOF unary_expression // GCC, variable alignment
[db70fe4]717 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
[a2e0687]718 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
[db70fe4]719 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
[84d58c5]720 | OFFSETOF '(' type_no_function ',' no_attr_identifier ')'
[d1625f8]721 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
[4d51835]722 | ATTR_IDENTIFIER
[db70fe4]723 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ) ) ); }
[4d51835]724 | ATTR_IDENTIFIER '(' argument_expression ')'
[db70fe4]725 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
[84d58c5]726 | ATTR_IDENTIFIER '(' type ')'
[db70fe4]727 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuildType( $3 ) ) ); }
[4d51835]728 ;
[51b73452]729
[dd51906]730ptrref_operator:
[d9e2280]731 '*' { $$ = OperKinds::PointTo; }
732 | '&' { $$ = OperKinds::AddressOf; }
[c6b1105]733 // GCC, address of label must be handled by semantic check for ref,ref,label
[9f07232]734 | ANDAND { $$ = OperKinds::And; }
[dd51906]735 ;
736
[51b73452]737unary_operator:
[d9e2280]738 '+' { $$ = OperKinds::UnPlus; }
739 | '-' { $$ = OperKinds::UnMinus; }
740 | '!' { $$ = OperKinds::Neg; }
741 | '~' { $$ = OperKinds::BitNeg; }
[4d51835]742 ;
[51b73452]743
744cast_expression:
[4d51835]745 unary_expression
[84d58c5]746 | '(' type_no_function ')' cast_expression
[d1625f8]747 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
[fae90d5f]748 | '(' COROUTINE '&' ')' cast_expression // CFA
[9a705dc8]749 { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Coroutine, $5 ) ); }
[fae90d5f]750 | '(' THREAD '&' ')' cast_expression // CFA
[9a705dc8]751 { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Thread, $5 ) ); }
[fae90d5f]752 | '(' MONITOR '&' ')' cast_expression // CFA
[9a705dc8]753 { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Monitor, $5 ) ); }
[72457b6]754 // VIRTUAL cannot be opt because of look ahead issues
[fae90d5f]755 | '(' VIRTUAL ')' cast_expression // CFA
[513e165]756 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $4 ), maybeMoveBuildType( nullptr ) ) ); }
[fae90d5f]757 | '(' VIRTUAL type_no_function ')' cast_expression // CFA
[513e165]758 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $5 ), maybeMoveBuildType( $3 ) ) ); }
[84d58c5]759// | '(' type_no_function ')' tuple
[1b29996]760// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
[4d51835]761 ;
[51b73452]762
[994d080]763exponential_expression:
[4d51835]764 cast_expression
[994d080]765 | exponential_expression '\\' cast_expression
[e5f2a67]766 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
[994d080]767 ;
768
769multiplicative_expression:
770 exponential_expression
771 | multiplicative_expression '*' exponential_expression
[d1625f8]772 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
[994d080]773 | multiplicative_expression '/' exponential_expression
[d1625f8]774 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
[994d080]775 | multiplicative_expression '%' exponential_expression
[d1625f8]776 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
[4d51835]777 ;
[51b73452]778
779additive_expression:
[4d51835]780 multiplicative_expression
781 | additive_expression '+' multiplicative_expression
[d1625f8]782 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
[4d51835]783 | additive_expression '-' multiplicative_expression
[d1625f8]784 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
[4d51835]785 ;
[51b73452]786
787shift_expression:
[4d51835]788 additive_expression
789 | shift_expression LS additive_expression
[d1625f8]790 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
[4d51835]791 | shift_expression RS additive_expression
[d1625f8]792 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
[4d51835]793 ;
[51b73452]794
795relational_expression:
[4d51835]796 shift_expression
797 | relational_expression '<' shift_expression
[d1625f8]798 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
[4d51835]799 | relational_expression '>' shift_expression
[d1625f8]800 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
[4d51835]801 | relational_expression LE shift_expression
[d1625f8]802 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
[4d51835]803 | relational_expression GE shift_expression
[d1625f8]804 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
[4d51835]805 ;
[51b73452]806
807equality_expression:
[4d51835]808 relational_expression
809 | equality_expression EQ relational_expression
[d1625f8]810 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
[4d51835]811 | equality_expression NE relational_expression
[d1625f8]812 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
[4d51835]813 ;
[51b73452]814
815AND_expression:
[4d51835]816 equality_expression
817 | AND_expression '&' equality_expression
[d1625f8]818 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
[4d51835]819 ;
[51b73452]820
821exclusive_OR_expression:
[4d51835]822 AND_expression
823 | exclusive_OR_expression '^' AND_expression
[d1625f8]824 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
[4d51835]825 ;
[51b73452]826
827inclusive_OR_expression:
[4d51835]828 exclusive_OR_expression
829 | inclusive_OR_expression '|' exclusive_OR_expression
[d1625f8]830 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
[4d51835]831 ;
[51b73452]832
833logical_AND_expression:
[4d51835]834 inclusive_OR_expression
835 | logical_AND_expression ANDAND inclusive_OR_expression
[d1625f8]836 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
[4d51835]837 ;
[51b73452]838
839logical_OR_expression:
[4d51835]840 logical_AND_expression
841 | logical_OR_expression OROR logical_AND_expression
[d1625f8]842 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
[4d51835]843 ;
[51b73452]844
845conditional_expression:
[4d51835]846 logical_OR_expression
847 | logical_OR_expression '?' comma_expression ':' conditional_expression
[d1625f8]848 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
[fae90d5f]849 // FIX ME: computes $1 twice
[4d51835]850 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
[d1625f8]851 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
[4d51835]852 ;
[51b73452]853
854constant_expression:
[4d51835]855 conditional_expression
856 ;
[51b73452]857
858assignment_expression:
[4d51835]859 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
860 conditional_expression
861 | unary_expression assignment_operator assignment_expression
[cda7889]862 { $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); }
[7fdb94e1]863 | unary_expression '=' '{' initializer_list_opt comma_opt '}'
[fae90d5f]864 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; }
[4d51835]865 ;
[51b73452]866
867assignment_expression_opt:
[4d51835]868 // empty
[d1625f8]869 { $$ = nullptr; }
[4d51835]870 | assignment_expression
871 ;
[b87a5ed]872
[9706554]873assignment_operator:
[d9e2280]874 '=' { $$ = OperKinds::Assign; }
[a839867]875 | ATassign { $$ = OperKinds::AtAssn; }
[e5f2a67]876 | EXPassign { $$ = OperKinds::ExpAssn; }
[d9e2280]877 | MULTassign { $$ = OperKinds::MulAssn; }
878 | DIVassign { $$ = OperKinds::DivAssn; }
879 | MODassign { $$ = OperKinds::ModAssn; }
880 | PLUSassign { $$ = OperKinds::PlusAssn; }
881 | MINUSassign { $$ = OperKinds::MinusAssn; }
882 | LSassign { $$ = OperKinds::LSAssn; }
883 | RSassign { $$ = OperKinds::RSAssn; }
884 | ANDassign { $$ = OperKinds::AndAssn; }
885 | ERassign { $$ = OperKinds::ERAssn; }
886 | ORassign { $$ = OperKinds::OrAssn; }
[413ad05]887 ;
[9706554]888
[b87a5ed]889tuple: // CFA, tuple
[de62360d]890 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
[c0aa336]891 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
[1b29996]892// '[' ']'
893// { $$ = new ExpressionNode( build_tuple() ); }
[13e8427]894// | '[' push assignment_expression pop ']'
[1b29996]895// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
[17238fd]896 '[' ',' tuple_expression_list ']'
897 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $3 ) ) ); }
898 | '[' push assignment_expression pop ',' tuple_expression_list ']'
899 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $6 ) ) ); }
[4d51835]900 ;
[51b73452]901
902tuple_expression_list:
[4d51835]903 assignment_expression_opt
904 | tuple_expression_list ',' assignment_expression_opt
[1d4580a]905 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
[4d51835]906 ;
[51b73452]907
908comma_expression:
[4d51835]909 assignment_expression
[9706554]910 | comma_expression ',' assignment_expression
[513e165]911 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
[4d51835]912 ;
[51b73452]913
914comma_expression_opt:
[4d51835]915 // empty
[58dd019]916 { $$ = nullptr; }
[4d51835]917 | comma_expression
918 ;
[51b73452]919
[c11e31c]920//*************************** STATEMENTS *******************************
[51b73452]921
922statement:
[4d51835]923 labeled_statement
924 | compound_statement
[c0a33d2]925 | expression_statement
[4d51835]926 | selection_statement
927 | iteration_statement
928 | jump_statement
[8b47e50]929 | with_statement
[b6b3c42]930 | mutex_statement
[5b2edbc]931 | waitfor_statement
[4d51835]932 | exception_statement
[2a8427c6]933 | enable_disable_statement
[fae90d5f]934 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; }
[4d51835]935 | asm_statement
[61fc4f6]936 | DIRECTIVE
[6d539f83]937 { $$ = new StatementNode( build_directive( $1 ) ); }
[b9be000b]938 ;
[51b73452]939
940labeled_statement:
[44a81853]941 // labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
942 identifier_or_type_name ':' attribute_list_opt statement
[1db21619]943 {
[44a81853]944 $$ = $4->add_label( $1, $3 );
[1db21619]945 }
[4d51835]946 ;
[51b73452]947
948compound_statement:
[4d51835]949 '{' '}'
[e82aa9df]950 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
[35718a9]951 | '{' push
[51b1202]952 local_label_declaration_opt // GCC, local labels
[9bd6105]953 statement_decl_list // C99, intermix declarations and statements
[c0aa336]954 pop '}'
[35718a9]955 { $$ = new StatementNode( build_compound( $4 ) ); }
[4d51835]956 ;
[b87a5ed]957
[9bd6105]958statement_decl_list: // C99
959 statement_decl
[35718a9]960 | statement_decl_list statement_decl
961 { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
[4d51835]962 ;
[51b73452]963
[9bd6105]964statement_decl:
[4d51835]965 declaration // CFA, new & old style declarations
[e82aa9df]966 { $$ = new StatementNode( $1 ); }
[4d51835]967 | EXTENSION declaration // GCC
[c0aa336]968 {
969 distExt( $2 );
[e82aa9df]970 $$ = new StatementNode( $2 );
[8e9cbb2]971 }
[4d51835]972 | function_definition
[e82aa9df]973 { $$ = new StatementNode( $1 ); }
[c0aa336]974 | EXTENSION function_definition // GCC
975 {
976 distExt( $2 );
977 $$ = new StatementNode( $2 );
978 }
[35718a9]979 | statement
[4d51835]980 ;
[51b73452]981
[9bd6105]982statement_list_nodecl:
[4d51835]983 statement
[9bd6105]984 | statement_list_nodecl statement
[1d4580a]985 { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
[4d51835]986 ;
[51b73452]987
988expression_statement:
[4d51835]989 comma_expression_opt ';'
[e82aa9df]990 { $$ = new StatementNode( build_expr( $1 ) ); }
[4d51835]991 ;
[51b73452]992
993selection_statement:
[3d26610]994 // pop causes a S/R conflict without separating the IF statement into a non-terminal even after resolving
995 // the inherent S/R conflict with THEN/ELSE.
996 push if_statement pop
997 { $$ = $2; }
[4cc585b]998 | SWITCH '(' comma_expression ')' case_clause
[6a276a0]999 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
[35718a9]1000 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
[4e06c1e]1001 {
[6a276a0]1002 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
[4e06c1e]1003 // The semantics of the declaration list is changed to include associated initialization, which is performed
1004 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
1005 // statement around the switch. Statements after the initial declaration list can never be executed, and
[8688ce1]1006 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
1007 // statement.
[a7741435]1008 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
[4e06c1e]1009 }
[4d51835]1010 | CHOOSE '(' comma_expression ')' case_clause // CFA
[6a276a0]1011 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
[35718a9]1012 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt pop '}' // CFA
[4e06c1e]1013 {
[6a276a0]1014 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
[a7741435]1015 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
[4e06c1e]1016 }
[4d51835]1017 ;
[b87a5ed]1018
[3d26610]1019if_statement:
1020 IF '(' if_control_expression ')' statement %prec THEN
1021 // explicitly deal with the shift/reduce conflict on if/else
1022 { $$ = new StatementNode( build_if( $3, $5, nullptr ) ); }
1023 | IF '(' if_control_expression ')' statement ELSE statement
1024 { $$ = new StatementNode( build_if( $3, $5, $7 ) ); }
1025 ;
1026
[936e9f4]1027if_control_expression:
[35718a9]1028 comma_expression
[936e9f4]1029 { $$ = new IfCtl( nullptr, $1 ); }
[35718a9]1030 | c_declaration // no semi-colon
[936e9f4]1031 { $$ = new IfCtl( $1, nullptr ); }
[35718a9]1032 | cfa_declaration // no semi-colon
[936e9f4]1033 { $$ = new IfCtl( $1, nullptr ); }
[6d49ea3]1034 | declaration comma_expression // semi-colon separated
[936e9f4]1035 { $$ = new IfCtl( $1, $2 ); }
1036 ;
1037
[de62360d]1038// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
1039// clause allows a list of values and subranges.
[b87a5ed]1040
1041case_value: // CFA
[4d51835]1042 constant_expression { $$ = $1; }
1043 | constant_expression ELLIPSIS constant_expression // GCC, subrange
[db70fe4]1044 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
[4d51835]1045 | subrange // CFA, subrange
1046 ;
[b87a5ed]1047
1048case_value_list: // CFA
[e82aa9df]1049 case_value { $$ = new StatementNode( build_case( $1 ) ); }
[064e3ff]1050 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
[e82aa9df]1051 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
[4d51835]1052 ;
[b87a5ed]1053
1054case_label: // CFA
[8688ce1]1055 CASE case_value_list ':' { $$ = $2; }
[e82aa9df]1056 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
[4d51835]1057 // A semantic check is required to ensure only one default clause per switch/choose statement.
1058 ;
[b87a5ed]1059
[6a276a0]1060//label_list_opt:
1061// // empty
1062// | identifier_or_type_name ':'
1063// | label_list_opt identifier_or_type_name ':'
1064// ;
1065
[b87a5ed]1066case_label_list: // CFA
[4d51835]1067 case_label
[1d4580a]1068 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
[4d51835]1069 ;
[b87a5ed]1070
1071case_clause: // CFA
[e82aa9df]1072 case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
[4d51835]1073 ;
[b87a5ed]1074
1075switch_clause_list_opt: // CFA
[4d51835]1076 // empty
[58dd019]1077 { $$ = nullptr; }
[4d51835]1078 | switch_clause_list
1079 ;
[b87a5ed]1080
1081switch_clause_list: // CFA
[9bd6105]1082 case_label_list statement_list_nodecl
[e82aa9df]1083 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
[9bd6105]1084 | switch_clause_list case_label_list statement_list_nodecl
[e82aa9df]1085 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
[4d51835]1086 ;
[b87a5ed]1087
[51b73452]1088iteration_statement:
[401e61f]1089 WHILE '(' push if_control_expression ')' statement pop
1090 { $$ = new StatementNode( build_while( $4, $6 ) ); }
[4d51835]1091 | DO statement WHILE '(' comma_expression ')' ';'
[401e61f]1092 { $$ = new StatementNode( build_do_while( $5, $2 ) ); }
[35718a9]1093 | FOR '(' push for_control_expression ')' statement pop
[e82aa9df]1094 { $$ = new StatementNode( build_for( $4, $6 ) ); }
[4d51835]1095 ;
[51b73452]1096
1097for_control_expression:
[35718a9]1098 comma_expression_opt ';' comma_expression_opt ';' comma_expression_opt
1099 { $$ = new ForCtl( $1, $3, $5 ); }
[4d51835]1100 | declaration comma_expression_opt ';' comma_expression_opt // C99
[2f22cc4]1101 { $$ = new ForCtl( $1, $2, $4 ); }
[d1625f8]1102 ;
[51b73452]1103
1104jump_statement:
[44a81853]1105 GOTO identifier_or_type_name ';'
[ab57786]1106 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
[4d51835]1107 | GOTO '*' comma_expression ';' // GCC, computed goto
[4e06c1e]1108 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
[de62360d]1109 // whereas normal operator precedence yields goto (*i)+3;
[e82aa9df]1110 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
[6a276a0]1111 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1112 | fall_through_name ';' // CFA
1113 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1114 | fall_through_name identifier_or_type_name ';' // CFA
1115 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1116 | fall_through_name DEFAULT ';' // CFA
1117 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
[4d51835]1118 | CONTINUE ';'
[de62360d]1119 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
[ab57786]1120 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
[44a81853]1121 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
[de62360d]1122 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1123 // the target of the transfer appears only at the start of an iteration statement.
[ab57786]1124 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
[4d51835]1125 | BREAK ';'
[de62360d]1126 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
[ab57786]1127 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
[44a81853]1128 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
[de62360d]1129 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1130 // the target of the transfer appears only at the start of an iteration statement.
[ab57786]1131 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
[4d51835]1132 | RETURN comma_expression_opt ';'
[e82aa9df]1133 { $$ = new StatementNode( build_return( $2 ) ); }
[7fdb94e1]1134 | RETURN '{' initializer_list_opt comma_opt '}'
[fae90d5f]1135 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; }
[8cc5cb0]1136 | THROW assignment_expression_opt ';' // handles rethrow
[e82aa9df]1137 { $$ = new StatementNode( build_throw( $2 ) ); }
[8cc5cb0]1138 | THROWRESUME assignment_expression_opt ';' // handles reresume
[daf1af8]1139 { $$ = new StatementNode( build_resume( $2 ) ); }
[8cc5cb0]1140 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
[daf1af8]1141 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
[4d51835]1142 ;
[51b73452]1143
[6a276a0]1144fall_through_name: // CFA
1145 FALLTHRU
1146 | FALLTHROUGH
1147 ;
1148
[8b47e50]1149with_statement:
[5b2edbc]1150 WITH '(' tuple_expression_list ')' statement
[a378ca7]1151 {
1152 $$ = new StatementNode( build_with( $3, $5 ) );
1153 }
[5b2edbc]1154 ;
1155
[b6b3c42]1156// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1157mutex_statement:
1158 MUTEX '(' argument_expression_list ')' statement
[fae90d5f]1159 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; }
[b6b3c42]1160 ;
1161
[51d6d6a]1162when_clause:
[6a276a0]1163 WHEN '(' comma_expression ')' { $$ = $3; }
[51d6d6a]1164 ;
1165
[5b2edbc]1166when_clause_opt:
1167 // empty
[135b431]1168 { $$ = nullptr; }
[51d6d6a]1169 | when_clause
[5b2edbc]1170 ;
1171
1172waitfor:
[713926ca]1173 WAITFOR '(' cast_expression ')'
1174 { $$ = $3; }
1175 | WAITFOR '(' cast_expression ',' argument_expression_list ')'
1176 { $$ = (ExpressionNode *)$3->set_last( $5 ); }
[5b2edbc]1177 ;
1178
1179timeout:
[6a276a0]1180 TIMEOUT '(' comma_expression ')' { $$ = $3; }
[5b2edbc]1181 ;
1182
1183waitfor_clause:
[51d6d6a]1184 when_clause_opt waitfor statement %prec THEN
[135b431]1185 { $$ = build_waitfor( $2, $3, $1 ); }
[5b2edbc]1186 | when_clause_opt waitfor statement WOR waitfor_clause
[135b431]1187 { $$ = build_waitfor( $2, $3, $1, $5 ); }
[51d6d6a]1188 | when_clause_opt timeout statement %prec THEN
[135b431]1189 { $$ = build_waitfor_timeout( $2, $3, $1 ); }
[5b2edbc]1190 | when_clause_opt ELSE statement
[135b431]1191 { $$ = build_waitfor_timeout( nullptr, $3, $1 ); }
[51d6d6a]1192 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
[713926ca]1193 | when_clause_opt timeout statement WOR ELSE statement
1194 { SemanticError( yylloc, "else clause must be conditional after timeout or timeout never triggered." ); $$ = nullptr; }
[51d6d6a]1195 | when_clause_opt timeout statement WOR when_clause ELSE statement
[135b431]1196 { $$ = build_waitfor_timeout( $2, $3, $1, $7, $5 ); }
[5b2edbc]1197 ;
1198
1199waitfor_statement:
[51d6d6a]1200 when_clause_opt waitfor statement %prec THEN
[135b431]1201 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
[5b2edbc]1202 | when_clause_opt waitfor statement WOR waitfor_clause
[135b431]1203 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
[8b47e50]1204 ;
1205
[51b73452]1206exception_statement:
[cfaabe2c]1207 TRY compound_statement handler_clause
[e82aa9df]1208 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
[4d51835]1209 | TRY compound_statement finally_clause
[e82aa9df]1210 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
[cfaabe2c]1211 | TRY compound_statement handler_clause finally_clause
[e82aa9df]1212 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
[4d51835]1213 ;
[51b73452]1214
1215handler_clause:
[3d26610]1216 handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1217 { $$ = new StatementNode( build_catch( $1, $4, $6, $8 ) ); }
1218 | handler_clause handler_key '(' push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1219 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $5, $7, $9 ) ) ); }
[994d080]1220 ;
1221
1222handler_predicate_opt:
[7fdb94e1]1223 // empty
[cbce272]1224 { $$ = nullptr; }
[6a276a0]1225 | ';' conditional_expression { $$ = $2; }
[307a732]1226 ;
1227
1228handler_key:
[6a276a0]1229 CATCH { $$ = CatchStmt::Terminate; }
1230 | CATCHRESUME { $$ = CatchStmt::Resume; }
[4d51835]1231 ;
[51b73452]1232
1233finally_clause:
[6a276a0]1234 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
[4d51835]1235 ;
[51b73452]1236
1237exception_declaration:
[d0ffed1]1238 // No SUE declaration in parameter list.
1239 type_specifier_nobody
1240 | type_specifier_nobody declarator
[c0a33d2]1241 { $$ = $2->addType( $1 ); }
[d0ffed1]1242 | type_specifier_nobody variable_abstract_declarator
[4d51835]1243 { $$ = $2->addType( $1 ); }
[c0aa336]1244 | cfa_abstract_declarator_tuple no_attr_identifier // CFA
[c0a33d2]1245 { $$ = $1->addName( $2 ); }
[c0aa336]1246 | cfa_abstract_declarator_tuple // CFA
[4d51835]1247 ;
[51b73452]1248
[2a8427c6]1249enable_disable_statement:
1250 enable_disable_key identifier_list compound_statement
1251 ;
1252
1253enable_disable_key:
1254 ENABLE
1255 | DISABLE
1256 ;
1257
[51b73452]1258asm_statement:
[ab57786]1259 ASM asm_volatile_opt '(' string_literal ')' ';'
[6d539f83]1260 { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
[ab57786]1261 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
[6d539f83]1262 { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
[ab57786]1263 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
[6d539f83]1264 { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); }
[ab57786]1265 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
[6d539f83]1266 { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
[ab57786]1267 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
[6d539f83]1268 { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
[7f5566b]1269 ;
1270
1271asm_volatile_opt: // GCC
1272 // empty
1273 { $$ = false; }
1274 | VOLATILE
1275 { $$ = true; }
[4d51835]1276 ;
[b87a5ed]1277
1278asm_operands_opt: // GCC
[4d51835]1279 // empty
[58dd019]1280 { $$ = nullptr; } // use default argument
[4d51835]1281 | asm_operands_list
1282 ;
[b87a5ed]1283
1284asm_operands_list: // GCC
[4d51835]1285 asm_operand
1286 | asm_operands_list ',' asm_operand
[1d4580a]1287 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
[4d51835]1288 ;
[b87a5ed]1289
1290asm_operand: // GCC
[ab57786]1291 string_literal '(' constant_expression ')'
[513e165]1292 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ), $1, maybeMoveBuild< Expression >( $3 ) ) ); }
[ab57786]1293 | '[' constant_expression ']' string_literal '(' constant_expression ')'
[513e165]1294 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( $2 ), $4, maybeMoveBuild< Expression >( $6 ) ) ); }
[7f5566b]1295 ;
1296
[4e06c1e]1297asm_clobbers_list_opt: // GCC
[7f5566b]1298 // empty
[58dd019]1299 { $$ = nullptr; } // use default argument
[ab57786]1300 | string_literal
[d1625f8]1301 { $$ = new ExpressionNode( $1 ); }
[ab57786]1302 | asm_clobbers_list_opt ',' string_literal
[513e165]1303 // set_last returns ParseNode *
[e82aa9df]1304 { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
[4d51835]1305 ;
[b87a5ed]1306
[7f5566b]1307label_list:
1308 no_attr_identifier
[ab57786]1309 {
1310 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1311 delete $1; // allocated by lexer
1312 }
[7f5566b]1313 | label_list ',' no_attr_identifier
[ab57786]1314 {
1315 $$ = $1; $1->labels.push_back( *$3 );
1316 delete $3; // allocated by lexer
1317 }
[4d51835]1318 ;
[51b73452]1319
[c11e31c]1320//******************************* DECLARATIONS *********************************
[51b73452]1321
[b87a5ed]1322declaration_list_opt: // used at beginning of switch statement
[35718a9]1323 // empty
[58dd019]1324 { $$ = nullptr; }
[4d51835]1325 | declaration_list
1326 ;
[51b73452]1327
1328declaration_list:
[4d51835]1329 declaration
[35718a9]1330 | declaration_list declaration
1331 { $$ = $1->appendList( $2 ); }
[4d51835]1332 ;
[51b73452]1333
[407bde5]1334KR_parameter_list_opt: // used to declare parameter types in K&R style functions
[4cc585b]1335 // empty
[58dd019]1336 { $$ = nullptr; }
[35718a9]1337 | KR_parameter_list
[4d51835]1338 ;
[51b73452]1339
[35718a9]1340KR_parameter_list:
[4cc585b]1341 push c_declaration pop ';'
1342 { $$ = $2; }
[35718a9]1343 | KR_parameter_list push c_declaration pop ';'
[4d51835]1344 { $$ = $1->appendList( $3 ); }
1345 ;
[b87a5ed]1346
[51b1202]1347local_label_declaration_opt: // GCC, local label
[4d51835]1348 // empty
[51b1202]1349 | local_label_declaration_list
[4d51835]1350 ;
[b87a5ed]1351
[51b1202]1352local_label_declaration_list: // GCC, local label
1353 LABEL local_label_list ';'
1354 | local_label_declaration_list LABEL local_label_list ';'
[4d51835]1355 ;
[b87a5ed]1356
[51b1202]1357local_label_list: // GCC, local label
[c0a33d2]1358 no_attr_identifier_or_type_name
1359 | local_label_list ',' no_attr_identifier_or_type_name
[4d51835]1360 ;
[b87a5ed]1361
[936e9f4]1362declaration: // old & new style declarations
[35718a9]1363 c_declaration ';'
1364 | cfa_declaration ';' // CFA
[b47b827]1365 | static_assert // C11
[4d51835]1366 ;
[b87a5ed]1367
[b9be000b]1368static_assert:
1369 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
[f6e3e34]1370 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
[b47b827]1371 | STATICASSERT '(' constant_expression ')' ';' // CFA
[6e3eaa57]1372 { $$ = DeclarationNode::newStaticAssert( $3, build_constantStr( *new string( "\"\"" ) ) ); }
[b9be000b]1373
[de62360d]1374// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1375// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1376// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1377// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1378// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1379// block, but cannot be mixed within a specific declaration.
[c11e31c]1380//
[b87a5ed]1381// CFA C
1382// [10] int x; int x[10]; // array of 10 integers
1383// [10] * char y; char *y[10]; // array of 10 pointers to char
1384
[c0aa336]1385cfa_declaration: // CFA
[4cc585b]1386 cfa_variable_declaration
1387 | cfa_typedef_declaration
1388 | cfa_function_declaration
1389 | type_declaring_list
1390 | trait_specifier
[4d51835]1391 ;
[b87a5ed]1392
[c0aa336]1393cfa_variable_declaration: // CFA
1394 cfa_variable_specifier initializer_opt
[7fdb94e1]1395 { $$ = $1->addInitializer( $2 ); }
[c0aa336]1396 | declaration_qualifier_list cfa_variable_specifier initializer_opt
[de62360d]1397 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1398 // them as a type_qualifier cannot appear in that context.
[7fdb94e1]1399 { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); }
[c0aa336]1400 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
[7fdb94e1]1401 { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); }
[4d51835]1402 ;
[b87a5ed]1403
[c0aa336]1404cfa_variable_specifier: // CFA
[de62360d]1405 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1406 // storage-class
[c0aa336]1407 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
[7fdb94e1]1408 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
[c0aa336]1409 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
[7fdb94e1]1410 { $$ = $1->addName( $2 )->addAsmName( $3 ); }
[c0aa336]1411 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
[7fdb94e1]1412 { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); }
[4d51835]1413 ;
[b87a5ed]1414
[c0aa336]1415cfa_function_declaration: // CFA
1416 cfa_function_specifier
1417 | type_qualifier_list cfa_function_specifier
[7fdb94e1]1418 { $$ = $2->addQualifiers( $1 ); }
[c0aa336]1419 | declaration_qualifier_list cfa_function_specifier
[7fdb94e1]1420 { $$ = $2->addQualifiers( $1 ); }
[c0aa336]1421 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
[7fdb94e1]1422 { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); }
[40de461]1423 | cfa_function_declaration ',' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
[4d51835]1424 {
[481115f]1425 // Append the return type at the start (left-hand-side) to each identifier in the list.
1426 DeclarationNode * ret = new DeclarationNode;
1427 ret->type = maybeClone( $1->type->base );
[40de461]1428 $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $6, nullptr ) );
[4d51835]1429 }
1430 ;
[b87a5ed]1431
[c0aa336]1432cfa_function_specifier: // CFA
[40de461]1433// '[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
[1b29996]1434// {
1435// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1436// }
[40de461]1437// '[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
[2871210]1438// {
1439// typedefTable.setNextIdentifier( *$5 );
1440// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1441// }
[40de461]1442// | '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
[2871210]1443// {
1444// typedefTable.setNextIdentifier( *$5 );
1445// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1446// }
1447// | '[' ']' typegen_name
1448 // identifier_or_type_name must be broken apart because of the sequence:
[4d51835]1449 //
[40de461]1450 // '[' ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
[4d51835]1451 // '[' ']' type_specifier
1452 //
[2871210]1453 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1454 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
[40de461]1455 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
[c0aa336]1456 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
[c0a33d2]1457 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 ); }
[40de461]1458 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')'
[c0a33d2]1459 { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 ); }
[4d51835]1460 ;
[b87a5ed]1461
[c0aa336]1462cfa_function_return: // CFA
[c0a33d2]1463 '[' push cfa_parameter_list pop ']'
1464 { $$ = DeclarationNode::newTuple( $3 ); }
1465 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
[b048dc3]1466 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the ']'.
[c0a33d2]1467 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
[4d51835]1468 ;
[b87a5ed]1469
[c0aa336]1470cfa_typedef_declaration: // CFA
1471 TYPEDEF cfa_variable_specifier
[4d51835]1472 {
[ecae5860]1473 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "1" );
[4d51835]1474 $$ = $2->addTypedef();
1475 }
[c0aa336]1476 | TYPEDEF cfa_function_specifier
[4d51835]1477 {
[ecae5860]1478 typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname, "2" );
[4d51835]1479 $$ = $2->addTypedef();
1480 }
[c0aa336]1481 | cfa_typedef_declaration pop ',' push no_attr_identifier
[4d51835]1482 {
[ecae5860]1483 typedefTable.addToEnclosingScope( *$5, TYPEDEFname, "3" );
[4d51835]1484 $$ = $1->appendList( $1->cloneType( $5 ) );
1485 }
1486 ;
[b87a5ed]1487
[de62360d]1488// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1489// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
[51b73452]1490
1491typedef_declaration:
[4d51835]1492 TYPEDEF type_specifier declarator
1493 {
[ecae5860]1494 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "4" );
[4d51835]1495 $$ = $3->addType( $2 )->addTypedef();
1496 }
1497 | typedef_declaration pop ',' push declarator
1498 {
[ecae5860]1499 typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname, "5" );
[4d51835]1500 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1501 }
[de62360d]1502 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
[4d51835]1503 {
[ecae5860]1504 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "6" );
[4d51835]1505 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1506 }
1507 | type_specifier TYPEDEF declarator
1508 {
[ecae5860]1509 typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname, "7" );
[4d51835]1510 $$ = $3->addType( $1 )->addTypedef();
1511 }
1512 | type_specifier TYPEDEF type_qualifier_list declarator
1513 {
[ecae5860]1514 typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname, "8" );
[de62360d]1515 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
[4d51835]1516 }
1517 ;
[b87a5ed]1518
[721f17a]1519typedef_expression:
1520 // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
[4d51835]1521 TYPEDEF no_attr_identifier '=' assignment_expression
1522 {
[7fdb94e1]1523 // $$ = DeclarationNode::newName( 0 ); // unimplemented
1524 SemanticError( yylloc, "Typedef expression is currently unimplemented." ); $$ = nullptr;
[4d51835]1525 }
1526 | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1527 {
[7fdb94e1]1528 // $$ = DeclarationNode::newName( 0 ); // unimplemented
1529 SemanticError( yylloc, "Typedef expression is currently unimplemented." ); $$ = nullptr;
[4d51835]1530 }
1531 ;
[51b73452]1532
[c0aa336]1533//c_declaration:
1534// declaring_list pop ';'
1535// | typedef_declaration pop ';'
1536// | typedef_expression pop ';' // GCC, naming expression type
1537// | sue_declaration_specifier pop ';'
1538// ;
1539//
1540//declaring_list:
1541// // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1542// // storage-class
1543// declarator asm_name_opt initializer_opt
1544// {
[2f0a0678]1545// typedefTable.addToEnclosingScope( IDENTIFIER );
[c0aa336]1546// $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 );
1547// }
1548// | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1549// {
[2f0a0678]1550// typedefTable.addToEnclosingScope( IDENTIFIER );
[c0aa336]1551// $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) );
1552// }
1553// ;
1554
1555c_declaration:
[4cc585b]1556 declaration_specifier declaring_list
[7fdb94e1]1557 { $$ = distAttr( $1, $2 ); }
[4cc585b]1558 | typedef_declaration
1559 | typedef_expression // GCC, naming expression type
1560 | sue_declaration_specifier
[4d51835]1561 ;
[51b73452]1562
1563declaring_list:
[de62360d]1564 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1565 // storage-class
[c0aa336]1566 declarator asm_name_opt initializer_opt
[7fdb94e1]1567 { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); }
[4d51835]1568 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
[7fdb94e1]1569 { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); }
[4d51835]1570 ;
[b87a5ed]1571
1572declaration_specifier: // type specifier + storage class
[4d51835]1573 basic_declaration_specifier
1574 | sue_declaration_specifier
[84d58c5]1575 | type_declaration_specifier
[4d51835]1576 ;
[b87a5ed]1577
[d0ffed1]1578declaration_specifier_nobody: // type specifier + storage class - {...}
1579 // Preclude SUE declarations in restricted scopes:
1580 //
1581 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1582 //
1583 // because it is impossible to call f due to name equivalence.
1584 basic_declaration_specifier
1585 | sue_declaration_specifier_nobody
[84d58c5]1586 | type_declaration_specifier
[d0ffed1]1587 ;
1588
1589type_specifier: // type specifier
[4d51835]1590 basic_type_specifier
1591 | sue_type_specifier
[84d58c5]1592 | type_type_specifier
[4d51835]1593 ;
[b87a5ed]1594
[d0ffed1]1595type_specifier_nobody: // type specifier - {...}
1596 // Preclude SUE declarations in restricted scopes:
1597 //
1598 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1599 //
1600 // because it is impossible to call f due to name equivalence.
1601 basic_type_specifier
1602 | sue_type_specifier_nobody
[84d58c5]1603 | type_type_specifier
[d0ffed1]1604 ;
1605
[b87a5ed]1606type_qualifier_list_opt: // GCC, used in asm_statement
[4d51835]1607 // empty
[58dd019]1608 { $$ = nullptr; }
[4d51835]1609 | type_qualifier_list
1610 ;
[51b73452]1611
1612type_qualifier_list:
[de62360d]1613 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
[4d51835]1614 //
[de62360d]1615 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1616 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1617 // appeared only once.
[4d51835]1618 type_qualifier
1619 | type_qualifier_list type_qualifier
1620 { $$ = $1->addQualifiers( $2 ); }
1621 ;
[51b73452]1622
1623type_qualifier:
[4d51835]1624 type_qualifier_name
1625 | attribute
1626 ;
[51b73452]1627
1628type_qualifier_name:
[4d51835]1629 CONST
[738e304]1630 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
[4d51835]1631 | RESTRICT
[738e304]1632 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
[4d51835]1633 | VOLATILE
[738e304]1634 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
[4d51835]1635 | ATOMIC
[738e304]1636 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
[a16a7ec]1637 | forall
1638 ;
1639
1640forall:
[35718a9]1641 FORALL '(' type_parameter_list ')' // CFA
1642 { $$ = DeclarationNode::newForall( $3 ); }
[4d51835]1643 ;
[51b73452]1644
1645declaration_qualifier_list:
[4d51835]1646 storage_class_list
[de62360d]1647 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
[4d51835]1648 { $$ = $1->addQualifiers( $2 ); }
1649 | declaration_qualifier_list type_qualifier_list storage_class_list
1650 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1651 ;
[51b73452]1652
1653storage_class_list:
[de62360d]1654 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1655 // only one of each is specified, except for inline, which can appear with the others.
[4d51835]1656 //
[de62360d]1657 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1658 // specifiers in a declaration.
[4d51835]1659 storage_class
1660 | storage_class_list storage_class
1661 { $$ = $1->addQualifiers( $2 ); }
1662 ;
[51b73452]1663
1664storage_class:
[4d51835]1665 EXTERN
[68fe077a]1666 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
[4d51835]1667 | STATIC
[68fe077a]1668 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
[4d51835]1669 | AUTO
[68fe077a]1670 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
[4d51835]1671 | REGISTER
[68fe077a]1672 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
[dd020c0]1673 | THREADLOCAL // C11
[68fe077a]1674 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
[dd020c0]1675 // Put function specifiers here to simplify parsing rules, but separate them semantically.
[4d51835]1676 | INLINE // C99
[ddfd945]1677 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
[4d51835]1678 | FORTRAN // C99
[ddfd945]1679 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
[68cd1ce]1680 | NORETURN // C11
[ddfd945]1681 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
[4d51835]1682 ;
[51b73452]1683
1684basic_type_name:
[201aeb9]1685 VOID
[4d51835]1686 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1687 | BOOL // C99
1688 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
[201aeb9]1689 | CHAR
1690 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1691 | INT
1692 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1693 | INT128
1694 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1695 | FLOAT
1696 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1697 | FLOAT80
1698 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float80 ); }
1699 | FLOAT128
1700 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float128 ); }
1701 | DOUBLE
1702 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
[4d51835]1703 | COMPLEX // C99
[5b639ee]1704 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
[4d51835]1705 | IMAGINARY // C99
[5b639ee]1706 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
[201aeb9]1707 | SIGNED
1708 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1709 | UNSIGNED
1710 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1711 | SHORT
1712 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1713 | LONG
1714 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
[72457b6]1715 | VALIST // GCC, __builtin_va_list
1716 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
[4d51835]1717 ;
[51b73452]1718
1719basic_declaration_specifier:
[4d51835]1720 // A semantic check is necessary for conflicting storage classes.
1721 basic_type_specifier
1722 | declaration_qualifier_list basic_type_specifier
1723 { $$ = $2->addQualifiers( $1 ); }
1724 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1725 { $$ = $1->addQualifiers( $2 ); }
1726 | basic_declaration_specifier storage_class type_qualifier_list
1727 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1728 | basic_declaration_specifier storage_class basic_type_specifier
1729 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1730 ;
[51b73452]1731
1732basic_type_specifier:
[84d58c5]1733 direct_type
[f38e7d7]1734 // Cannot have type modifiers, e.g., short, long, etc.
[84d58c5]1735 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
[4d51835]1736 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1737 ;
[51b73452]1738
[84d58c5]1739direct_type:
[4d51835]1740 basic_type_name
1741 | type_qualifier_list basic_type_name
1742 { $$ = $2->addQualifiers( $1 ); }
[84d58c5]1743 | direct_type type_qualifier
[4d51835]1744 { $$ = $1->addQualifiers( $2 ); }
[84d58c5]1745 | direct_type basic_type_name
[4d51835]1746 { $$ = $1->addType( $2 ); }
1747 ;
[51b73452]1748
[84d58c5]1749indirect_type:
1750 TYPEOF '(' type ')' // GCC: typeof(x) y;
[4d51835]1751 { $$ = $3; }
1752 | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1753 { $$ = DeclarationNode::newTypeof( $3 ); }
[84d58c5]1754 | ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y;
[4d51835]1755 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1756 | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1757 { $$ = DeclarationNode::newAttr( $1, $3 ); }
[f38e7d7]1758 | ZERO_T // CFA
1759 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1760 | ONE_T // CFA
1761 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
[4d51835]1762 ;
[51b73452]1763
[d0ffed1]1764sue_declaration_specifier: // struct, union, enum + storage class + type specifier
[4d51835]1765 sue_type_specifier
1766 | declaration_qualifier_list sue_type_specifier
1767 { $$ = $2->addQualifiers( $1 ); }
1768 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1769 { $$ = $1->addQualifiers( $2 ); }
1770 | sue_declaration_specifier storage_class type_qualifier_list
1771 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1772 ;
[51b73452]1773
[d0ffed1]1774sue_type_specifier: // struct, union, enum + type specifier
1775 elaborated_type
[fdca7c6]1776 | type_qualifier_list
1777 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1778 elaborated_type
1779 { $$ = $3->addQualifiers( $1 ); }
[4d51835]1780 | sue_type_specifier type_qualifier
[284da8c]1781 {
1782 if ( $2->type != nullptr && $2->type->forall ) forall = true; // remember generic type
1783 $$ = $1->addQualifiers( $2 );
1784 }
[4d51835]1785 ;
[51b73452]1786
[d0ffed1]1787sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1788 sue_type_specifier_nobody
1789 | declaration_qualifier_list sue_type_specifier_nobody
1790 { $$ = $2->addQualifiers( $1 ); }
1791 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1792 { $$ = $1->addQualifiers( $2 ); }
1793 | sue_declaration_specifier_nobody storage_class type_qualifier_list
1794 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1795 ;
1796
1797sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1798 elaborated_type_nobody
1799 | type_qualifier_list elaborated_type_nobody
1800 { $$ = $2->addQualifiers( $1 ); }
1801 | sue_type_specifier_nobody type_qualifier
1802 { $$ = $1->addQualifiers( $2 ); }
1803 ;
1804
[84d58c5]1805type_declaration_specifier:
1806 type_type_specifier
1807 | declaration_qualifier_list type_type_specifier
[4d51835]1808 { $$ = $2->addQualifiers( $1 ); }
[84d58c5]1809 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
[4d51835]1810 { $$ = $1->addQualifiers( $2 ); }
[84d58c5]1811 | type_declaration_specifier storage_class type_qualifier_list
[4d51835]1812 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1813 ;
[b87a5ed]1814
[84d58c5]1815type_type_specifier: // typedef types
1816 type_name
1817 | type_qualifier_list type_name
1818 { $$ = $2->addQualifiers( $1 ); }
1819 | type_type_specifier type_qualifier
1820 { $$ = $1->addQualifiers( $2 ); }
1821 ;
1822
1823type_name:
[4d51835]1824 TYPEDEFname
1825 { $$ = DeclarationNode::newFromTypedef( $1 ); }
[84d58c5]1826 | '.' TYPEDEFname
[407bde5]1827 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[84d58c5]1828 | type_name '.' TYPEDEFname
[407bde5]1829 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[84d58c5]1830 | typegen_name
1831 | '.' typegen_name
[407bde5]1832 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[84d58c5]1833 | type_name '.' typegen_name
[407bde5]1834 { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; }
[84d58c5]1835 ;
1836
1837typegen_name: // CFA
[65d6de4]1838 TYPEGENname
1839 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1840 | TYPEGENname '(' ')'
[67cf18c]1841 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1842 | TYPEGENname '(' type_list ')'
[84d58c5]1843 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
[4d51835]1844 ;
[51b73452]1845
[d0ffed1]1846elaborated_type: // struct, union, enum
[c0aa336]1847 aggregate_type
1848 | enum_type
[4d51835]1849 ;
[51b73452]1850
[d0ffed1]1851elaborated_type_nobody: // struct, union, enum - {...}
1852 aggregate_type_nobody
1853 | enum_type_nobody
1854 ;
1855
[3d56d15b]1856fred:
1857 // empty
1858 { yyy = false; }
1859 ;
1860
[d0ffed1]1861aggregate_type: // struct, union
[fc20514]1862 aggregate_key attribute_list_opt
1863 { forall = false; } // reset
1864 '{' field_declaration_list_opt '}' type_parameters_opt
1865 { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $7, $5, true )->addQualifiers( $2 ); }
[3d56d15b]1866 | aggregate_key attribute_list_opt no_attr_identifier fred
[fdca7c6]1867 {
[fc20514]1868 typedefTable.makeTypedef( *$3, forall | typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
[fdca7c6]1869 forall = false; // reset
1870 }
[284da8c]1871 '{' field_declaration_list_opt '}' type_parameters_opt
1872 { $$ = DeclarationNode::newAggregate( $1, $3, $9, $7, true )->addQualifiers( $2 ); }
[3d56d15b]1873 | aggregate_key attribute_list_opt type_name fred
[407bde5]1874 {
[fc20514]1875 typedefTable.makeTypedef( *$3->type->symbolic.name, forall | typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname ); // create typedef
[407bde5]1876 forall = false; // reset
1877 }
[284da8c]1878 '{' field_declaration_list_opt '}' type_parameters_opt
1879 { $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $9, $7, true )->addQualifiers( $2 ); }
[d0ffed1]1880 | aggregate_type_nobody
1881 ;
1882
[284da8c]1883type_parameters_opt:
1884 // empty
1885 { $$ = nullptr; } %prec '}'
1886 | '(' type_list ')'
1887 { $$ = $2; }
1888 ;
1889
[d0ffed1]1890aggregate_type_nobody: // struct, union - {...}
[3d56d15b]1891 aggregate_key attribute_list_opt no_attr_identifier fred
[84d58c5]1892 {
[fc20514]1893 typedefTable.makeTypedef( *$3, forall | typedefTable.getEnclForall() ? TYPEGENname : TYPEDEFname );
[9997fee]1894 forall = false; // reset
[84d58c5]1895 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1896 }
[3d56d15b]1897 | aggregate_key attribute_list_opt type_name fred
[65d6de4]1898 {
[fc20514]1899 forall = false; // reset
[65d6de4]1900 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
1901 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
1902 // delete newFromTypeGen.
1903 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
1904 $3->type->symbolic.name = nullptr;
1905 $3->type->symbolic.actuals = nullptr;
1906 delete $3;
1907 }
[4d51835]1908 ;
[51b73452]1909
1910aggregate_key:
[c0aa336]1911 STRUCT
[3d56d15b]1912 { yyy = true; $$ = DeclarationNode::Struct; }
[c0aa336]1913 | UNION
[3d56d15b]1914 { yyy = true; $$ = DeclarationNode::Union; }
[c27fb59]1915 | EXCEPTION
[3d56d15b]1916 { yyy = true; $$ = DeclarationNode::Exception; }
[d3bc0ad]1917 | COROUTINE
[3d56d15b]1918 { yyy = true; $$ = DeclarationNode::Coroutine; }
[d3bc0ad]1919 | MONITOR
[3d56d15b]1920 { yyy = true; $$ = DeclarationNode::Monitor; }
[d3bc0ad]1921 | THREAD
[3d56d15b]1922 { yyy = true; $$ = DeclarationNode::Thread; }
[4d51835]1923 ;
[51b73452]1924
[7fdb94e1]1925field_declaration_list_opt:
[5d125e4]1926 // empty
[58dd019]1927 { $$ = nullptr; }
[7fdb94e1]1928 | field_declaration_list_opt field_declaration
[a7741435]1929 { $$ = $1 ? $1->appendList( $2 ) : $2; }
[4d51835]1930 ;
[51b73452]1931
1932field_declaration:
[46fa473]1933 type_specifier field_declaring_list ';'
1934 { $$ = distAttr( $1, $2 ); }
[c0aa336]1935 | EXTENSION type_specifier field_declaring_list ';' // GCC
[46fa473]1936 { distExt( $3 ); $$ = distAttr( $2, $3 ); } // mark all fields in list
1937 | typedef_declaration ';' // CFA
1938 { SemanticError( yylloc, "Typedef in aggregate is currently unimplemented." ); $$ = nullptr; }
1939 | cfa_field_declaring_list ';' // CFA, new style field declaration
1940 | EXTENSION cfa_field_declaring_list ';' // GCC
1941 { distExt( $2 ); $$ = $2; } // mark all fields in list
1942 | cfa_typedef_declaration ';' // CFA
1943 { SemanticError( yylloc, "Typedef in aggregate is currently unimplemented." ); $$ = nullptr; }
[b47b827]1944 | static_assert // C11
[4d51835]1945 ;
[b87a5ed]1946
[c0aa336]1947cfa_field_declaring_list: // CFA, new style field declaration
1948 cfa_abstract_declarator_tuple // CFA, no field name
1949 | cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
[4d51835]1950 { $$ = $1->addName( $2 ); }
[c0aa336]1951 | cfa_field_declaring_list ',' no_attr_identifier_or_type_name
[4d51835]1952 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
[c0aa336]1953 | cfa_field_declaring_list ',' // CFA, no field name
[4d51835]1954 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
1955 ;
[51b73452]1956
1957field_declaring_list:
[7fdb94e1]1958 field_declarator_opt
1959 | field_declaring_list ',' attribute_list_opt field_declarator_opt
[c0aa336]1960 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
[4d51835]1961 ;
[51b73452]1962
[7fdb94e1]1963field_declarator_opt:
[4d51835]1964 // empty
1965 { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
[6f95000]1966 // '@'
1967 // { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name
[4d51835]1968 | bit_subrange_size // no field name
1969 { $$ = DeclarationNode::newBitfield( $1 ); }
1970 | variable_declarator bit_subrange_size_opt
1971 // A semantic check is required to ensure bit_subrange only appears on base type int.
1972 { $$ = $1->addBitfield( $2 ); }
[c6b1105]1973 | variable_type_redeclarator bit_subrange_size_opt
[4d51835]1974 // A semantic check is required to ensure bit_subrange only appears on base type int.
1975 { $$ = $1->addBitfield( $2 ); }
1976 | variable_abstract_declarator // CFA, no field name
1977 ;
[51b73452]1978
1979bit_subrange_size_opt:
[4d51835]1980 // empty
[58dd019]1981 { $$ = nullptr; }
[4d51835]1982 | bit_subrange_size
1983 ;
[51b73452]1984
1985bit_subrange_size:
[4d51835]1986 ':' constant_expression
1987 { $$ = $2; }
1988 ;
[51b73452]1989
[d0ffed1]1990enum_type: // enum
[c0aa336]1991 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
[6f95000]1992 { $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); }
[407bde5]1993 | ENUM attribute_list_opt no_attr_identifier
[d0ffed1]1994 { typedefTable.makeTypedef( *$3 ); }
1995 '{' enumerator_list comma_opt '}'
1996 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
[407bde5]1997 | ENUM attribute_list_opt type_name
1998 '{' enumerator_list comma_opt '}'
1999 { $$ = DeclarationNode::newEnum( $3->type->symbolic.name, $5, true )->addQualifiers( $2 ); }
[d0ffed1]2000 | enum_type_nobody
2001 ;
2002
2003enum_type_nobody: // enum - {...}
[407bde5]2004 ENUM attribute_list_opt no_attr_identifier
[45161b4d]2005 {
[c0aa336]2006 typedefTable.makeTypedef( *$3 );
[ca1a547]2007 $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
[45161b4d]2008 }
[407bde5]2009 | ENUM attribute_list_opt type_name
2010 {
2011 typedefTable.makeTypedef( *$3->type->symbolic.name );
2012 $$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false )->addQualifiers( $2 );
2013 }
[4d51835]2014 ;
[51b73452]2015
2016enumerator_list:
[2871210]2017 no_attr_identifier_or_type_name enumerator_value_opt
[4d51835]2018 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
[2871210]2019 | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
[4d51835]2020 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
2021 ;
[51b73452]2022
2023enumerator_value_opt:
[4d51835]2024 // empty
[58dd019]2025 { $$ = nullptr; }
[4d51835]2026 | '=' constant_expression
2027 { $$ = $2; }
2028 ;
[51b73452]2029
[40de461]2030cfa_parameter_ellipsis_list_opt: // CFA, abstract + real
[4d51835]2031 // empty
[2a8427c6]2032 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2033 | ELLIPSIS
[58dd019]2034 { $$ = nullptr; }
[2a8427c6]2035 | cfa_abstract_parameter_list
[c0aa336]2036 | cfa_parameter_list
[c0a33d2]2037 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2038 { $$ = $1->appendList( $5 ); }
2039 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
[4d51835]2040 { $$ = $1->addVarArgs(); }
[c0a33d2]2041 | cfa_parameter_list pop ',' push ELLIPSIS
[4d51835]2042 { $$ = $1->addVarArgs(); }
2043 ;
[b87a5ed]2044
[c0aa336]2045cfa_parameter_list: // CFA
2046 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2047 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2048 cfa_parameter_declaration
[c0a33d2]2049 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2050 { $$ = $1->appendList( $5 ); }
2051 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2052 { $$ = $1->appendList( $5 ); }
2053 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2054 { $$ = $1->appendList( $5 )->appendList( $9 ); }
[4d51835]2055 ;
[b87a5ed]2056
[c0aa336]2057cfa_abstract_parameter_list: // CFA, new & old style abstract
2058 cfa_abstract_parameter_declaration
[c0a33d2]2059 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2060 { $$ = $1->appendList( $5 ); }
[4d51835]2061 ;
[51b73452]2062
2063parameter_type_list_opt:
[4d51835]2064 // empty
[58dd019]2065 { $$ = nullptr; }
[2a8427c6]2066 | ELLIPSIS
2067 { $$ = nullptr; }
2068 | parameter_list
[4d51835]2069 | parameter_list pop ',' push ELLIPSIS
2070 { $$ = $1->addVarArgs(); }
2071 ;
[b87a5ed]2072
2073parameter_list: // abstract + real
[4d51835]2074 abstract_parameter_declaration
2075 | parameter_declaration
2076 | parameter_list pop ',' push abstract_parameter_declaration
2077 { $$ = $1->appendList( $5 ); }
2078 | parameter_list pop ',' push parameter_declaration
2079 { $$ = $1->appendList( $5 ); }
2080 ;
[51b73452]2081
[de62360d]2082// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
[2871210]2083// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
[51b73452]2084
[c0aa336]2085cfa_parameter_declaration: // CFA, new & old style parameter declaration
[4d51835]2086 parameter_declaration
[994d080]2087 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt
[4d51835]2088 { $$ = $1->addName( $2 ); }
[994d080]2089 | cfa_abstract_tuple identifier_or_type_name default_initialize_opt
[c0aa336]2090 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
[4d51835]2091 { $$ = $1->addName( $2 ); }
[994d080]2092 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt
[4d51835]2093 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
[c0aa336]2094 | cfa_function_specifier
[4d51835]2095 ;
[b87a5ed]2096
[c0aa336]2097cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
[4d51835]2098 abstract_parameter_declaration
[c0aa336]2099 | cfa_identifier_parameter_declarator_no_tuple
2100 | cfa_abstract_tuple
2101 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2102 | type_qualifier_list cfa_abstract_tuple
[4d51835]2103 { $$ = $2->addQualifiers( $1 ); }
[c0aa336]2104 | cfa_abstract_function
[4d51835]2105 ;
[51b73452]2106
2107parameter_declaration:
[d0ffed1]2108 // No SUE declaration in parameter list.
[994d080]2109 declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt
[7fdb94e1]2110 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
[994d080]2111 | declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt
[7fdb94e1]2112 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
[4d51835]2113 ;
[51b73452]2114
2115abstract_parameter_declaration:
[994d080]2116 declaration_specifier_nobody default_initialize_opt
[e7cc8cb]2117 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
[994d080]2118 | declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt
[e7cc8cb]2119 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
[4d51835]2120 ;
[51b73452]2121
[c11e31c]2122// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
[de62360d]2123// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2124// identifiers. The ANSI-style parameter-list can redefine a typedef name.
[51b73452]2125
[b87a5ed]2126identifier_list: // K&R-style parameter list => no types
[4d51835]2127 no_attr_identifier
2128 { $$ = DeclarationNode::newName( $1 ); }
2129 | identifier_list ',' no_attr_identifier
2130 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2131 ;
[51b73452]2132
[2871210]2133identifier_or_type_name:
[4d51835]2134 identifier
2135 | TYPEDEFname
2136 | TYPEGENname
2137 ;
[51b73452]2138
[2871210]2139no_attr_identifier_or_type_name:
[4d51835]2140 no_attr_identifier
2141 | TYPEDEFname
[721f17a]2142 | TYPEGENname
[4d51835]2143 ;
[b87a5ed]2144
[84d58c5]2145type_no_function: // sizeof, alignof, cast (constructor)
[c0aa336]2146 cfa_abstract_declarator_tuple // CFA
[4d51835]2147 | type_specifier
[c0aa336]2148 | type_specifier abstract_declarator
[4d51835]2149 { $$ = $2->addType( $1 ); }
2150 ;
[b87a5ed]2151
[84d58c5]2152type: // typeof, assertion
2153 type_no_function
[c0aa336]2154 | cfa_abstract_function // CFA
[4d51835]2155 ;
[51b73452]2156
2157initializer_opt:
[4d51835]2158 // empty
[58dd019]2159 { $$ = nullptr; }
[2871210]2160 | '=' initializer
2161 { $$ = $2; }
[641c3d0]2162 | '=' VOID
[3ed994e]2163 { $$ = new InitializerNode( true ); }
[097e2b0]2164 | ATassign initializer
[974906e2]2165 { $$ = $2->set_maybeConstructed( false ); }
[4d51835]2166 ;
[51b73452]2167
2168initializer:
[de62360d]2169 assignment_expression { $$ = new InitializerNode( $1 ); }
[7fdb94e1]2170 | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); }
[4d51835]2171 ;
[51b73452]2172
[7fdb94e1]2173initializer_list_opt:
[097e2b0]2174 // empty
[58dd019]2175 { $$ = nullptr; }
[097e2b0]2176 | initializer
[4d51835]2177 | designation initializer { $$ = $2->set_designators( $1 ); }
[7fdb94e1]2178 | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2179 | initializer_list_opt ',' designation initializer
[1d4580a]2180 { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
[4d51835]2181 ;
[b87a5ed]2182
[de62360d]2183// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2184// '=' to separator the designator from the initializer value, as in:
[c11e31c]2185//
[b87a5ed]2186// int x[10] = { [1] = 3 };
[c11e31c]2187//
[de62360d]2188// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2189// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2190// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2191// shift/reduce conflicts
[51b73452]2192
2193designation:
[4d51835]2194 designator_list ':' // C99, CFA uses ":" instead of "="
[84d58c5]2195 | no_attr_identifier ':' // GCC, field name
[d1625f8]2196 { $$ = new ExpressionNode( build_varref( $1 ) ); }
[4d51835]2197 ;
[51b73452]2198
[b87a5ed]2199designator_list: // C99
[4d51835]2200 designator
[2871210]2201 | designator_list designator
[1d4580a]2202 { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
[d1625f8]2203 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
[4d51835]2204 ;
[51b73452]2205
2206designator:
[84d58c5]2207 '.' no_attr_identifier // C99, field name
[d1625f8]2208 { $$ = new ExpressionNode( build_varref( $2 ) ); }
[c0a33d2]2209 | '[' push assignment_expression pop ']' // C99, single array element
[de62360d]2210 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
[d1625f8]2211 { $$ = $3; }
[c0a33d2]2212 | '[' push subrange pop ']' // CFA, multiple array elements
2213 { $$ = $3; }
2214 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2215 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $3 ), maybeMoveBuild< Expression >( $5 ) ) ); }
2216 | '.' '[' push field_list pop ']' // CFA, tuple field selector
2217 { $$ = $4; }
[4d51835]2218 ;
[51b73452]2219
[de62360d]2220// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2221// rather than an object-oriented type system. This required four groups of extensions:
[c11e31c]2222//
2223// Overloading: function, data, and operator identifiers may be overloaded.
2224//
[de62360d]2225// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2226// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2227// definitions of new types. Type declarations with storage class "extern" provide opaque types.
[c11e31c]2228//
[de62360d]2229// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2230// site. A polymorphic function is not a template; it is a function, with an address and a type.
[c11e31c]2231//
2232// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
[de62360d]2233// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2234// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2235// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2236// on type arguments of polymorphic functions.
[c11e31c]2237
[b87a5ed]2238type_parameter_list: // CFA
[67cf18c]2239 type_parameter
2240 | type_parameter_list ',' type_parameter
[4d51835]2241 { $$ = $1->appendList( $3 ); }
2242 ;
[b87a5ed]2243
[84d58c5]2244type_initializer_opt: // CFA
2245 // empty
2246 { $$ = nullptr; }
2247 | '=' type
2248 { $$ = $2; }
2249 ;
2250
[b87a5ed]2251type_parameter: // CFA
[2871210]2252 type_class no_attr_identifier_or_type_name
[ecae5860]2253 { typedefTable.addToScope( *$2, TYPEDEFname, "9" ); }
[67cf18c]2254 type_initializer_opt assertion_list_opt
2255 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
[4d51835]2256 | type_specifier identifier_parameter_declarator
[9997fee]2257 | assertion_list
2258 { $$ = DeclarationNode::newTypeParam( DeclarationNode::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); }
[4d51835]2259 ;
[b87a5ed]2260
2261type_class: // CFA
[4040425]2262 OTYPE
[5b639ee]2263 { $$ = DeclarationNode::Otype; }
[4d51835]2264 | DTYPE
2265 { $$ = DeclarationNode::Dtype; }
[8f60f0b]2266 | FTYPE
2267 { $$ = DeclarationNode::Ftype; }
2268 | TTYPE
2269 { $$ = DeclarationNode::Ttype; }
[4d51835]2270 ;
[b87a5ed]2271
2272assertion_list_opt: // CFA
[4d51835]2273 // empty
[58dd019]2274 { $$ = nullptr; }
[9997fee]2275 | assertion_list
2276 ;
2277
2278assertion_list: // CFA
2279 assertion
2280 | assertion_list assertion
[a7741435]2281 { $$ = $1 ? $1->appendList( $2 ) : $2; }
[4d51835]2282 ;
[b87a5ed]2283
2284assertion: // CFA
[84d58c5]2285 '|' no_attr_identifier_or_type_name '(' type_list ')'
[7fdb94e1]2286 { $$ = DeclarationNode::newTraitUse( $2, $4 ); }
[13e8427]2287 | '|' '{' push trait_declaration_list pop '}'
[4d51835]2288 { $$ = $4; }
[35718a9]2289 // | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list pop '}' '(' type_list ')'
2290 // { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; }
[4d51835]2291 ;
[b87a5ed]2292
[84d58c5]2293type_list: // CFA
2294 type
[513e165]2295 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
[4d51835]2296 | assignment_expression
[84d58c5]2297 | type_list ',' type
[513e165]2298 { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) ) ); }
[84d58c5]2299 | type_list ',' assignment_expression
[1d4580a]2300 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
[4d51835]2301 ;
[b87a5ed]2302
2303type_declaring_list: // CFA
[4040425]2304 OTYPE type_declarator
[4d51835]2305 { $$ = $2; }
[4040425]2306 | storage_class_list OTYPE type_declarator
[4d51835]2307 { $$ = $3->addQualifiers( $1 ); }
2308 | type_declaring_list ',' type_declarator
[a7c90d4]2309 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
[4d51835]2310 ;
[b87a5ed]2311
2312type_declarator: // CFA
[4d51835]2313 type_declarator_name assertion_list_opt
2314 { $$ = $1->addAssertions( $2 ); }
[84d58c5]2315 | type_declarator_name assertion_list_opt '=' type
[4d51835]2316 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2317 ;
[b87a5ed]2318
2319type_declarator_name: // CFA
[2871210]2320 no_attr_identifier_or_type_name
[4d51835]2321 {
[ecae5860]2322 typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
[4d51835]2323 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2324 }
[35718a9]2325 | no_attr_identifier_or_type_name '(' type_parameter_list ')'
[4d51835]2326 {
[ecae5860]2327 typedefTable.addToEnclosingScope( *$1, TYPEGENname, "11" );
[35718a9]2328 $$ = DeclarationNode::newTypeDecl( $1, $3 );
[4d51835]2329 }
2330 ;
[b87a5ed]2331
[4040425]2332trait_specifier: // CFA
[35718a9]2333 TRAIT no_attr_identifier_or_type_name '(' type_parameter_list ')' '{' '}'
2334 { $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
2335 | TRAIT no_attr_identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
2336 { $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
[4d51835]2337 ;
[b87a5ed]2338
[84d58c5]2339trait_declaration_list: // CFA
[4040425]2340 trait_declaration
[13e8427]2341 | trait_declaration_list pop push trait_declaration
2342 { $$ = $1->appendList( $4 ); }
[4d51835]2343 ;
[b87a5ed]2344
[84d58c5]2345trait_declaration: // CFA
[13e8427]2346 cfa_trait_declaring_list ';'
2347 | trait_declaring_list ';'
[4d51835]2348 ;
[b87a5ed]2349
[c0aa336]2350cfa_trait_declaring_list: // CFA
2351 cfa_variable_specifier
2352 | cfa_function_specifier
2353 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
[7fdb94e1]2354 { $$ = $1->appendList( $1->cloneType( $5 ) ); }
[4d51835]2355 ;
[b87a5ed]2356
[4040425]2357trait_declaring_list: // CFA
[4d51835]2358 type_specifier declarator
[7fdb94e1]2359 { $$ = $2->addType( $1 ); }
[4040425]2360 | trait_declaring_list pop ',' push declarator
[7fdb94e1]2361 { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); }
[4d51835]2362 ;
[51b73452]2363
[c11e31c]2364//***************************** EXTERNAL DEFINITIONS *****************************
[51b73452]2365
2366translation_unit:
[3d56d15b]2367 // empty, input file
[4d51835]2368 | external_definition_list
[a7741435]2369 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
[4d51835]2370 ;
[51b73452]2371
2372external_definition_list:
[35718a9]2373 push external_definition pop
2374 { $$ = $2; }
[fc20514]2375 | external_definition_list push external_definition pop
2376 { $$ = $1 ? $1->appendList( $3 ) : $3; }
[4d51835]2377 ;
[51b73452]2378
2379external_definition_list_opt:
[4d51835]2380 // empty
[58dd019]2381 { $$ = nullptr; }
[3d56d15b]2382 | external_definition_list
2383 ;
2384
2385up:
[fc20514]2386 { typedefTable.up( forall ); forall = false; }
[3d56d15b]2387 ;
2388
2389down:
2390 { typedefTable.down(); }
[4d51835]2391 ;
[51b73452]2392
2393external_definition:
[4d51835]2394 declaration
2395 | external_function_definition
[ecae5860]2396 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2397 {
2398 distExt( $2 ); // mark all fields in list
2399 $$ = $2;
2400 }
[e994912]2401 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2402 {
[6d539f83]2403 $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) );
[e994912]2404 }
[c0aa336]2405 | EXTERN STRINGliteral // C++-style linkage specifier
[4d51835]2406 {
[3b8e52c]2407 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
[d55d7a6]2408 linkage = LinkageSpec::linkageUpdate( yylloc, linkage, $2 );
[4d51835]2409 }
[3d56d15b]2410 '{' up external_definition_list_opt down '}'
[4d51835]2411 {
2412 linkage = linkageStack.top();
2413 linkageStack.pop();
[3d56d15b]2414 $$ = $6;
[8e9cbb2]2415 }
[9997fee]2416 | type_qualifier_list
2417 {
[3d56d15b]2418 if ( $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
[fc20514]2419 if ( $1->type->forall ) forall = true; // remember generic type
[3d56d15b]2420 }
2421 '{' up external_definition_list_opt down '}' // CFA, namespace
2422 {
[4c3ee8d]2423 distQual( $5, $1 );
[fc20514]2424 forall = false;
[3d56d15b]2425 $$ = $5;
[9997fee]2426 }
2427 | declaration_qualifier_list
2428 {
[4c3ee8d]2429 if ( $1->type && $1->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
[fc20514]2430 if ( $1->type && $1->type->forall ) forall = true; // remember generic type
[3d56d15b]2431 }
2432 '{' up external_definition_list_opt down '}' // CFA, namespace
2433 {
[4c3ee8d]2434 distQual( $5, $1 );
[fc20514]2435 forall = false;
[3d56d15b]2436 $$ = $5;
[9997fee]2437 }
2438 | declaration_qualifier_list type_qualifier_list
2439 {
[3d56d15b]2440 if ( ($1->type && $1->type->qualifiers.val) || $2->type->qualifiers.val ) { SemanticError( yylloc, "CV qualifiers cannot be distributed; only storage-class and forall qualifiers." ); }
[fc20514]2441 if ( ($1->type && $1->type->forall) || $2->type->forall ) forall = true; // remember generic type
[9997fee]2442 }
[3d56d15b]2443 '{' up external_definition_list_opt down '}' // CFA, namespace
[9997fee]2444 {
[284da8c]2445 distQual( $6, $1->addQualifiers( $2 ) );
[fc20514]2446 forall = false;
[3d56d15b]2447 $$ = $6;
[9997fee]2448 }
[4d51835]2449 ;
2450
2451external_function_definition:
2452 function_definition
[de62360d]2453 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
[c6b1105]2454 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2455 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2456 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2457 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
[4d51835]2458 | function_declarator compound_statement
[c0a33d2]2459 { $$ = $1->addFunctionBody( $2 ); }
[35718a9]2460 | KR_function_declarator KR_parameter_list_opt compound_statement
[c0a33d2]2461 { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); }
[4d51835]2462 ;
[51b73452]2463
[8b47e50]2464with_clause_opt:
2465 // empty
[9997fee]2466 { $$ = nullptr; forall = false; }
[578e6037]2467 | WITH '(' tuple_expression_list ')'
[9997fee]2468 { $$ = $3; forall = false; }
[8b47e50]2469 ;
2470
[51b73452]2471function_definition:
[8b47e50]2472 cfa_function_declaration with_clause_opt compound_statement // CFA
[4d51835]2473 {
[481115f]2474 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2475 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
[5fcba14]2476 $1->get_last()->addFunctionBody( $3, $2 );
[481115f]2477 $$ = $1;
[4d51835]2478 }
[8b47e50]2479 | declaration_specifier function_declarator with_clause_opt compound_statement
[4d51835]2480 {
[c38ae92]2481 rebindForall( $1, $2 );
[7fdb94e1]2482 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2483 }
2484 | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement
2485 {
2486 rebindForall( $1, $2 );
[5fcba14]2487 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
[4d51835]2488 }
[a16a7ec]2489 // handles default int return type, OBSOLESCENT (see 1)
[8b47e50]2490 | type_qualifier_list function_declarator with_clause_opt compound_statement
[c0a33d2]2491 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
[a16a7ec]2492 // handles default int return type, OBSOLESCENT (see 1)
[8b47e50]2493 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
[c0a33d2]2494 { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); }
[a16a7ec]2495 // handles default int return type, OBSOLESCENT (see 1)
[8b47e50]2496 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
[c0a33d2]2497 { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); }
[4d51835]2498
2499 // Old-style K&R function definition, OBSOLESCENT (see 4)
[35718a9]2500 | declaration_specifier KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
[4d51835]2501 {
[c38ae92]2502 rebindForall( $1, $2 );
[5fcba14]2503 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
[4d51835]2504 }
[a16a7ec]2505 // handles default int return type, OBSOLESCENT (see 1)
[35718a9]2506 | type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
[c0a33d2]2507 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
[a16a7ec]2508 // handles default int return type, OBSOLESCENT (see 1)
[35718a9]2509 | declaration_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
[c0a33d2]2510 { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); }
[a16a7ec]2511 // handles default int return type, OBSOLESCENT (see 1)
[35718a9]2512 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_parameter_list_opt with_clause_opt compound_statement
[c0a33d2]2513 { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); }
[4d51835]2514 ;
[51b73452]2515
2516declarator:
[4d51835]2517 variable_declarator
[c6b1105]2518 | variable_type_redeclarator
[4d51835]2519 | function_declarator
2520 ;
[51b73452]2521
2522subrange:
[4d51835]2523 constant_expression '~' constant_expression // CFA, integer subrange
[db70fe4]2524 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
[4d51835]2525 ;
[b87a5ed]2526
2527asm_name_opt: // GCC
[4d51835]2528 // empty
[58dd019]2529 { $$ = nullptr; }
2530 | ASM '(' string_literal ')' attribute_list_opt
[c0aa336]2531 {
2532 DeclarationNode * name = new DeclarationNode();
2533 name->asmName = $3;
2534 $$ = name->addQualifiers( $5 );
2535 }
[4d51835]2536 ;
[b87a5ed]2537
2538attribute_list_opt: // GCC
[4d51835]2539 // empty
[58dd019]2540 { $$ = nullptr; }
[4d51835]2541 | attribute_list
2542 ;
[b87a5ed]2543
2544attribute_list: // GCC
[4d51835]2545 attribute
2546 | attribute_list attribute
[1db21619]2547 { $$ = $2->addQualifiers( $1 ); }
[4d51835]2548 ;
[b87a5ed]2549
2550attribute: // GCC
[44a81853]2551 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2552 { $$ = $4; }
[4d51835]2553 ;
[b87a5ed]2554
[44a81853]2555attribute_name_list: // GCC
2556 attribute_name
2557 | attribute_name_list ',' attribute_name
[c0aa336]2558 { $$ = $3->addQualifiers( $1 ); }
[4d51835]2559 ;
[b87a5ed]2560
[44a81853]2561attribute_name: // GCC
[4d51835]2562 // empty
[44a81853]2563 { $$ = nullptr; }
2564 | attr_name
2565 { $$ = DeclarationNode::newAttribute( $1 ); }
2566 | attr_name '(' argument_expression_list ')'
2567 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
[4d51835]2568 ;
[b87a5ed]2569
[44a81853]2570attr_name: // GCC
2571 IDENTIFIER
[5b2edbc]2572 | quasi_keyword
[44a81853]2573 | TYPEDEFname
2574 | TYPEGENname
[114014c]2575 | FALLTHROUGH
2576 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
[44a81853]2577 | CONST
[9ff56e7]2578 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
[4d51835]2579 ;
[51b73452]2580
[c11e31c]2581// ============================================================================
[de62360d]2582// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2583// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2584// in:
[c11e31c]2585//
[b87a5ed]2586// int (*f())[10] { ... };
2587// ... (*f())[3] += 1; // definition mimics usage
[c11e31c]2588//
[de62360d]2589// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2590// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
[c11e31c]2591// ============================================================================
2592
2593// ----------------------------------------------------------------------------
[de62360d]2594// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2595// to define a variable or function prototype, e.g.:
[c11e31c]2596//
[b87a5ed]2597// valid declaration invalid definition
2598// ----------------- ------------------
[4d51835]2599// int f; int f {}
2600// int *f; int *f {}
[b87a5ed]2601// int f[10]; int f[10] {}
[4d51835]2602// int (*f)(int); int (*f)(int) {}
[c11e31c]2603//
[de62360d]2604// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2605// variable_declarator and function_declarator.
[c11e31c]2606// ----------------------------------------------------------------------------
2607
[de62360d]2608// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2609// declaring an array of functions versus a pointer to an array of functions.
[51b73452]2610
2611variable_declarator:
[4d51835]2612 paren_identifier attribute_list_opt
[1db21619]2613 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2614 | variable_ptr
2615 | variable_array attribute_list_opt
[1db21619]2616 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2617 | variable_function attribute_list_opt
[1db21619]2618 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2619 ;
[51b73452]2620
2621paren_identifier:
[4d51835]2622 identifier
[7fdb94e1]2623 { $$ = DeclarationNode::newName( $1 ); }
[4d51835]2624 | '(' paren_identifier ')' // redundant parenthesis
2625 { $$ = $2; }
2626 ;
[51b73452]2627
2628variable_ptr:
[dd51906]2629 ptrref_operator variable_declarator
[ce8c12f]2630 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]2631 | ptrref_operator type_qualifier_list variable_declarator
[ce8c12f]2632 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2633 | '(' variable_ptr ')' attribute_list_opt
2634 { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
[4d51835]2635 ;
[51b73452]2636
2637variable_array:
[4d51835]2638 paren_identifier array_dimension
2639 { $$ = $1->addArray( $2 ); }
2640 | '(' variable_ptr ')' array_dimension
2641 { $$ = $2->addArray( $4 ); }
2642 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2643 { $$ = $2->addArray( $4 ); }
2644 | '(' variable_array ')' // redundant parenthesis
2645 { $$ = $2; }
2646 ;
[51b73452]2647
2648variable_function:
[4d51835]2649 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2650 { $$ = $2->addParamList( $6 ); }
2651 | '(' variable_function ')' // redundant parenthesis
2652 { $$ = $2; }
2653 ;
[51b73452]2654
[c6b1105]2655// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2656// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2657// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
[51b73452]2658
2659function_declarator:
[4d51835]2660 function_no_ptr attribute_list_opt
[1db21619]2661 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2662 | function_ptr
2663 | function_array attribute_list_opt
[1db21619]2664 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2665 ;
[51b73452]2666
2667function_no_ptr:
[4d51835]2668 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2669 { $$ = $1->addParamList( $4 ); }
2670 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2671 { $$ = $2->addParamList( $6 ); }
2672 | '(' function_no_ptr ')' // redundant parenthesis
2673 { $$ = $2; }
2674 ;
[51b73452]2675
2676function_ptr:
[dd51906]2677 ptrref_operator function_declarator
[ce8c12f]2678 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]2679 | ptrref_operator type_qualifier_list function_declarator
[ce8c12f]2680 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[4d51835]2681 | '(' function_ptr ')'
2682 { $$ = $2; }
2683 ;
[51b73452]2684
2685function_array:
[4d51835]2686 '(' function_ptr ')' array_dimension
2687 { $$ = $2->addArray( $4 ); }
2688 | '(' function_array ')' multi_array_dimension // redundant parenthesis
2689 { $$ = $2->addArray( $4 ); }
2690 | '(' function_array ')' // redundant parenthesis
2691 { $$ = $2; }
2692 ;
[51b73452]2693
[c0aa336]2694// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2695//
2696// f( a, b, c ) int a, *b, c[]; {}
2697//
2698// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2699// returning arrays and functions versus pointers to arrays and functions.
[51b73452]2700
[c0aa336]2701KR_function_declarator:
2702 KR_function_no_ptr
2703 | KR_function_ptr
2704 | KR_function_array
[4d51835]2705 ;
[51b73452]2706
[c0aa336]2707KR_function_no_ptr:
[4d51835]2708 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2709 { $$ = $1->addIdList( $3 ); }
[c0a33d2]2710 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2711 { $$ = $2->addParamList( $6 ); }
[c0aa336]2712 | '(' KR_function_no_ptr ')' // redundant parenthesis
[4d51835]2713 { $$ = $2; }
2714 ;
[51b73452]2715
[c0aa336]2716KR_function_ptr:
2717 ptrref_operator KR_function_declarator
[ce8c12f]2718 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c0aa336]2719 | ptrref_operator type_qualifier_list KR_function_declarator
[ce8c12f]2720 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2721 | '(' KR_function_ptr ')'
[4d51835]2722 { $$ = $2; }
2723 ;
[51b73452]2724
[c0aa336]2725KR_function_array:
2726 '(' KR_function_ptr ')' array_dimension
[4d51835]2727 { $$ = $2->addArray( $4 ); }
[c0aa336]2728 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
[4d51835]2729 { $$ = $2->addArray( $4 ); }
[c0aa336]2730 | '(' KR_function_array ')' // redundant parenthesis
[4d51835]2731 { $$ = $2; }
2732 ;
[51b73452]2733
[2871210]2734// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
[c11e31c]2735//
[b87a5ed]2736// typedef int foo;
2737// {
2738// int foo; // redefine typedef name in new scope
2739// }
[c11e31c]2740//
[de62360d]2741// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2742// and functions versus pointers to arrays and functions.
[51b73452]2743
[c6b1105]2744variable_type_redeclarator:
[2871210]2745 paren_type attribute_list_opt
[1db21619]2746 { $$ = $1->addQualifiers( $2 ); }
[2871210]2747 | type_ptr
2748 | type_array attribute_list_opt
[1db21619]2749 { $$ = $1->addQualifiers( $2 ); }
[2871210]2750 | type_function attribute_list_opt
[1db21619]2751 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2752 ;
[51b73452]2753
[2871210]2754paren_type:
2755 typedef
[2f0a0678]2756 // hide type name in enclosing scope by variable name
[ecae5860]2757 { typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER, "ID" ); }
[2871210]2758 | '(' paren_type ')'
[4d51835]2759 { $$ = $2; }
2760 ;
[51b73452]2761
[2871210]2762type_ptr:
[c6b1105]2763 ptrref_operator variable_type_redeclarator
[ce8c12f]2764 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c6b1105]2765 | ptrref_operator type_qualifier_list variable_type_redeclarator
[ce8c12f]2766 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2767 | '(' type_ptr ')' attribute_list_opt
2768 { $$ = $2->addQualifiers( $4 ); }
[4d51835]2769 ;
[51b73452]2770
[2871210]2771type_array:
2772 paren_type array_dimension
[4d51835]2773 { $$ = $1->addArray( $2 ); }
[2871210]2774 | '(' type_ptr ')' array_dimension
[4d51835]2775 { $$ = $2->addArray( $4 ); }
[2871210]2776 | '(' type_array ')' multi_array_dimension // redundant parenthesis
[4d51835]2777 { $$ = $2->addArray( $4 ); }
[2871210]2778 | '(' type_array ')' // redundant parenthesis
[4d51835]2779 { $$ = $2; }
2780 ;
[51b73452]2781
[2871210]2782type_function:
2783 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
[4d51835]2784 { $$ = $1->addParamList( $4 ); }
[2871210]2785 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
[4d51835]2786 { $$ = $2->addParamList( $6 ); }
[2871210]2787 | '(' type_function ')' // redundant parenthesis
[4d51835]2788 { $$ = $2; }
2789 ;
[51b73452]2790
[c0aa336]2791// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2792// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2793// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2794// pointers to arrays and functions.
[51b73452]2795
2796identifier_parameter_declarator:
[4d51835]2797 paren_identifier attribute_list_opt
[1db21619]2798 { $$ = $1->addQualifiers( $2 ); }
[b6b3c42]2799 | '&' MUTEX paren_identifier attribute_list_opt
2800 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
[4d51835]2801 | identifier_parameter_ptr
2802 | identifier_parameter_array attribute_list_opt
[1db21619]2803 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2804 | identifier_parameter_function attribute_list_opt
[1db21619]2805 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2806 ;
[51b73452]2807
2808identifier_parameter_ptr:
[dd51906]2809 ptrref_operator identifier_parameter_declarator
[ce8c12f]2810 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]2811 | ptrref_operator type_qualifier_list identifier_parameter_declarator
[ce8c12f]2812 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2813 | '(' identifier_parameter_ptr ')' attribute_list_opt
2814 { $$ = $2->addQualifiers( $4 ); }
[4d51835]2815 ;
[51b73452]2816
2817identifier_parameter_array:
[4d51835]2818 paren_identifier array_parameter_dimension
2819 { $$ = $1->addArray( $2 ); }
2820 | '(' identifier_parameter_ptr ')' array_dimension
2821 { $$ = $2->addArray( $4 ); }
2822 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2823 { $$ = $2->addArray( $4 ); }
2824 | '(' identifier_parameter_array ')' // redundant parenthesis
2825 { $$ = $2; }
2826 ;
[51b73452]2827
2828identifier_parameter_function:
[c0a33d2]2829 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2830 { $$ = $1->addParamList( $4 ); }
2831 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2832 { $$ = $2->addParamList( $6 ); }
[4d51835]2833 | '(' identifier_parameter_function ')' // redundant parenthesis
2834 { $$ = $2; }
2835 ;
[b87a5ed]2836
[de62360d]2837// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2838// e.g.:
[c11e31c]2839//
[b87a5ed]2840// typedef int foo;
[114014c]2841// forall( otype T ) struct foo;
[b87a5ed]2842// int f( int foo ); // redefine typedef name in new scope
[c11e31c]2843//
[c0aa336]2844// and allows the C99 array options, which can only appear in a parameter list.
[51b73452]2845
[2871210]2846type_parameter_redeclarator:
[4d51835]2847 typedef attribute_list_opt
[1db21619]2848 { $$ = $1->addQualifiers( $2 ); }
[b6b3c42]2849 | '&' MUTEX typedef attribute_list_opt
2850 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
[2871210]2851 | type_parameter_ptr
2852 | type_parameter_array attribute_list_opt
[1db21619]2853 { $$ = $1->addQualifiers( $2 ); }
[2871210]2854 | type_parameter_function attribute_list_opt
[1db21619]2855 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2856 ;
[51b73452]2857
2858typedef:
[4d51835]2859 TYPEDEFname
[7fdb94e1]2860 { $$ = DeclarationNode::newName( $1 ); }
[2871210]2861 | TYPEGENname
[7fdb94e1]2862 { $$ = DeclarationNode::newName( $1 ); }
[4d51835]2863 ;
[51b73452]2864
[2871210]2865type_parameter_ptr:
[dd51906]2866 ptrref_operator type_parameter_redeclarator
[ce8c12f]2867 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]2868 | ptrref_operator type_qualifier_list type_parameter_redeclarator
[ce8c12f]2869 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2870 | '(' type_parameter_ptr ')' attribute_list_opt
2871 { $$ = $2->addQualifiers( $4 ); }
[4d51835]2872 ;
[51b73452]2873
[2871210]2874type_parameter_array:
[4d51835]2875 typedef array_parameter_dimension
2876 { $$ = $1->addArray( $2 ); }
[2871210]2877 | '(' type_parameter_ptr ')' array_parameter_dimension
[4d51835]2878 { $$ = $2->addArray( $4 ); }
2879 ;
[51b73452]2880
[2871210]2881type_parameter_function:
[c0a33d2]2882 typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2883 { $$ = $1->addParamList( $4 ); }
2884 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2885 { $$ = $2->addParamList( $6 ); }
[4d51835]2886 ;
[b87a5ed]2887
[de62360d]2888// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2889// which the type applies, e.g.:
[c11e31c]2890//
[b87a5ed]2891// sizeof( int );
[c0aa336]2892// sizeof( int * );
[b87a5ed]2893// sizeof( int [10] );
[c0aa336]2894// sizeof( int (*)() );
2895// sizeof( int () );
[c11e31c]2896//
[de62360d]2897// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2898// and functions versus pointers to arrays and functions.
[51b73452]2899
2900abstract_declarator:
[4d51835]2901 abstract_ptr
2902 | abstract_array attribute_list_opt
[1db21619]2903 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2904 | abstract_function attribute_list_opt
[1db21619]2905 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2906 ;
[51b73452]2907
2908abstract_ptr:
[dd51906]2909 ptrref_operator
[ce8c12f]2910 { $$ = DeclarationNode::newPointer( 0, $1 ); }
[dd51906]2911 | ptrref_operator type_qualifier_list
[ce8c12f]2912 { $$ = DeclarationNode::newPointer( $2, $1 ); }
[dd51906]2913 | ptrref_operator abstract_declarator
[ce8c12f]2914 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]2915 | ptrref_operator type_qualifier_list abstract_declarator
[ce8c12f]2916 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]2917 | '(' abstract_ptr ')' attribute_list_opt
2918 { $$ = $2->addQualifiers( $4 ); }
[4d51835]2919 ;
[51b73452]2920
2921abstract_array:
[4d51835]2922 array_dimension
2923 | '(' abstract_ptr ')' array_dimension
2924 { $$ = $2->addArray( $4 ); }
2925 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2926 { $$ = $2->addArray( $4 ); }
2927 | '(' abstract_array ')' // redundant parenthesis
2928 { $$ = $2; }
2929 ;
[51b73452]2930
2931abstract_function:
[c0a33d2]2932 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2933 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2934 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2935 { $$ = $2->addParamList( $6 ); }
[4d51835]2936 | '(' abstract_function ')' // redundant parenthesis
2937 { $$ = $2; }
2938 ;
[51b73452]2939
2940array_dimension:
[4d51835]2941 // Only the first dimension can be empty.
[2871210]2942 '[' ']'
[4d51835]2943 { $$ = DeclarationNode::newArray( 0, 0, false ); }
[2871210]2944 | '[' ']' multi_array_dimension
2945 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
[4d51835]2946 | multi_array_dimension
2947 ;
[51b73452]2948
2949multi_array_dimension:
[c0a33d2]2950 '[' push assignment_expression pop ']'
2951 { $$ = DeclarationNode::newArray( $3, 0, false ); }
2952 | '[' push '*' pop ']' // C99
[4d51835]2953 { $$ = DeclarationNode::newVarArray( 0 ); }
[c0a33d2]2954 | multi_array_dimension '[' push assignment_expression pop ']'
2955 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2956 | multi_array_dimension '[' push '*' pop ']' // C99
[4d51835]2957 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2958 ;
[51b73452]2959
[c11e31c]2960// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2961// identifier to which the type applies, e.g.:
2962//
[c0aa336]2963// int f( int ); // not handled here
2964// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2965// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
[b87a5ed]2966// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
[c11e31c]2967//
[de62360d]2968// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
[c0aa336]2969// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2970// special meaning of parenthesis around a typedef name:
2971//
2972// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2973// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2974// not as redundant parentheses around the identifier."
2975//
2976// For example:
2977//
2978// typedef float T;
2979// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2980// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2981// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2982// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2983//
2984// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2985// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2986// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2987// functions.
[51b73452]2988
2989abstract_parameter_declarator:
[4d51835]2990 abstract_parameter_ptr
[b6b3c42]2991 | '&' MUTEX attribute_list_opt
2992 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
[4d51835]2993 | abstract_parameter_array attribute_list_opt
[1db21619]2994 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2995 | abstract_parameter_function attribute_list_opt
[1db21619]2996 { $$ = $1->addQualifiers( $2 ); }
[4d51835]2997 ;
[51b73452]2998
2999abstract_parameter_ptr:
[dd51906]3000 ptrref_operator
[ce8c12f]3001 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
[dd51906]3002 | ptrref_operator type_qualifier_list
[ce8c12f]3003 { $$ = DeclarationNode::newPointer( $2, $1 ); }
[dd51906]3004 | ptrref_operator abstract_parameter_declarator
[ce8c12f]3005 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
[dd51906]3006 | ptrref_operator type_qualifier_list abstract_parameter_declarator
[ce8c12f]3007 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]3008 | '(' abstract_parameter_ptr ')' attribute_list_opt
3009 { $$ = $2->addQualifiers( $4 ); }
[4d51835]3010 ;
[51b73452]3011
3012abstract_parameter_array:
[4d51835]3013 array_parameter_dimension
3014 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3015 { $$ = $2->addArray( $4 ); }
3016 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3017 { $$ = $2->addArray( $4 ); }
3018 | '(' abstract_parameter_array ')' // redundant parenthesis
3019 { $$ = $2; }
3020 ;
[51b73452]3021
3022abstract_parameter_function:
[c0a33d2]3023 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3024 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3025 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3026 { $$ = $2->addParamList( $6 ); }
[4d51835]3027 | '(' abstract_parameter_function ')' // redundant parenthesis
3028 { $$ = $2; }
3029 ;
[51b73452]3030
3031array_parameter_dimension:
[4d51835]3032 // Only the first dimension can be empty or have qualifiers.
3033 array_parameter_1st_dimension
3034 | array_parameter_1st_dimension multi_array_dimension
3035 { $$ = $1->addArray( $2 ); }
3036 | multi_array_dimension
3037 ;
[51b73452]3038
[c11e31c]3039// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3040//
[de62360d]3041// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3042// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
[51b73452]3043
3044array_parameter_1st_dimension:
[2871210]3045 '[' ']'
[4d51835]3046 { $$ = DeclarationNode::newArray( 0, 0, false ); }
[13e8427]3047 // multi_array_dimension handles the '[' '*' ']' case
[c0a33d2]3048 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3049 { $$ = DeclarationNode::newVarArray( $3 ); }
3050 | '[' push type_qualifier_list pop ']'
3051 { $$ = DeclarationNode::newArray( 0, $3, false ); }
[13e8427]3052 // multi_array_dimension handles the '[' assignment_expression ']' case
[c0a33d2]3053 | '[' push type_qualifier_list assignment_expression pop ']'
3054 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3055 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3056 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3057 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3058 { $$ = DeclarationNode::newArray( $5, $3, true ); }
[4d51835]3059 ;
[b87a5ed]3060
[c0aa336]3061// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
[c11e31c]3062//
[c0aa336]3063// struct S {
3064// int;
3065// int *;
3066// int [10];
3067// int (*)();
3068// };
[51b73452]3069
3070variable_abstract_declarator:
[4d51835]3071 variable_abstract_ptr
3072 | variable_abstract_array attribute_list_opt
[1db21619]3073 { $$ = $1->addQualifiers( $2 ); }
[4d51835]3074 | variable_abstract_function attribute_list_opt
[1db21619]3075 { $$ = $1->addQualifiers( $2 ); }
[4d51835]3076 ;
[51b73452]3077
3078variable_abstract_ptr:
[dd51906]3079 ptrref_operator
[ce8c12f]3080 { $$ = DeclarationNode::newPointer( 0, $1 ); }
[dd51906]3081 | ptrref_operator type_qualifier_list
[ce8c12f]3082 { $$ = DeclarationNode::newPointer( $2, $1 ); }
[dd51906]3083 | ptrref_operator variable_abstract_declarator
[ce8c12f]3084 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]3085 | ptrref_operator type_qualifier_list variable_abstract_declarator
[ce8c12f]3086 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
[c0aa336]3087 | '(' variable_abstract_ptr ')' attribute_list_opt
3088 { $$ = $2->addQualifiers( $4 ); }
[4d51835]3089 ;
[51b73452]3090
3091variable_abstract_array:
[4d51835]3092 array_dimension
3093 | '(' variable_abstract_ptr ')' array_dimension
3094 { $$ = $2->addArray( $4 ); }
3095 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3096 { $$ = $2->addArray( $4 ); }
3097 | '(' variable_abstract_array ')' // redundant parenthesis
3098 { $$ = $2; }
3099 ;
[51b73452]3100
3101variable_abstract_function:
[c0a33d2]3102 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3103 { $$ = $2->addParamList( $6 ); }
[4d51835]3104 | '(' variable_abstract_function ')' // redundant parenthesis
3105 { $$ = $2; }
3106 ;
[b87a5ed]3107
[de62360d]3108// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3109// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
[b87a5ed]3110
[c0aa336]3111cfa_identifier_parameter_declarator_tuple: // CFA
3112 cfa_identifier_parameter_declarator_no_tuple
3113 | cfa_abstract_tuple
3114 | type_qualifier_list cfa_abstract_tuple
[4d51835]3115 { $$ = $2->addQualifiers( $1 ); }
3116 ;
[b87a5ed]3117
[c0aa336]3118cfa_identifier_parameter_declarator_no_tuple: // CFA
3119 cfa_identifier_parameter_ptr
3120 | cfa_identifier_parameter_array
[4d51835]3121 ;
[b87a5ed]3122
[c0aa336]3123cfa_identifier_parameter_ptr: // CFA
[d0ffed1]3124 // No SUE declaration in parameter list.
3125 ptrref_operator type_specifier_nobody
[ce8c12f]3126 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[d0ffed1]3127 | type_qualifier_list ptrref_operator type_specifier_nobody
[ce8c12f]3128 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[c0aa336]3129 | ptrref_operator cfa_abstract_function
[ce8c12f]3130 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c0aa336]3131 | type_qualifier_list ptrref_operator cfa_abstract_function
[ce8c12f]3132 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[c0aa336]3133 | ptrref_operator cfa_identifier_parameter_declarator_tuple
[ce8c12f]3134 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c0aa336]3135 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
[ce8c12f]3136 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[4d51835]3137 ;
[b87a5ed]3138
[c0aa336]3139cfa_identifier_parameter_array: // CFA
[de62360d]3140 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3141 // shift/reduce conflict with new-style empty (void) function return type.
[d0ffed1]3142 '[' ']' type_specifier_nobody
[2871210]3143 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
[d0ffed1]3144 | cfa_array_parameter_1st_dimension type_specifier_nobody
[4d51835]3145 { $$ = $2->addNewArray( $1 ); }
[d0ffed1]3146 | '[' ']' multi_array_dimension type_specifier_nobody
[2871210]3147 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
[d0ffed1]3148 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
[4d51835]3149 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
[d0ffed1]3150 | multi_array_dimension type_specifier_nobody
[4d51835]3151 { $$ = $2->addNewArray( $1 ); }
[9059213]3152
[c0aa336]3153 | '[' ']' cfa_identifier_parameter_ptr
[2871210]3154 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
[c0aa336]3155 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
[4d51835]3156 { $$ = $2->addNewArray( $1 ); }
[c0aa336]3157 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
[2871210]3158 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
[c0aa336]3159 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
[4d51835]3160 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
[c0aa336]3161 | multi_array_dimension cfa_identifier_parameter_ptr
[4d51835]3162 { $$ = $2->addNewArray( $1 ); }
3163 ;
[51b73452]3164
[c0aa336]3165cfa_array_parameter_1st_dimension:
[c0a33d2]3166 '[' push type_qualifier_list '*' pop ']' // remaining C99
3167 { $$ = DeclarationNode::newVarArray( $3 ); }
3168 | '[' push type_qualifier_list assignment_expression pop ']'
3169 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3170 | '[' push declaration_qualifier_list assignment_expression pop ']'
[4d51835]3171 // declaration_qualifier_list must be used because of shift/reduce conflict with
3172 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3173 // appear in this context.
[c0a33d2]3174 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3175 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3176 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
[4d51835]3177 ;
[b87a5ed]3178
[de62360d]3179// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3180// identifier to which the type applies, e.g.:
[c11e31c]3181//
[b87a5ed]3182// [int] f( int ); // abstract variable parameter; no parameter name specified
3183// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
[c11e31c]3184//
3185// These rules need LR(3):
3186//
[c0aa336]3187// cfa_abstract_tuple identifier_or_type_name
[40de461]3188// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_ellipsis_list_opt ')'
[c11e31c]3189//
3190// since a function return type can be syntactically identical to a tuple type:
3191//
[b87a5ed]3192// [int, int] t;
3193// [int, int] f( int );
[c11e31c]3194//
[2871210]3195// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
[c0aa336]3196// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3197// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3198// duplicated when appearing with cfa_function_specifier.
[b87a5ed]3199
[c0aa336]3200cfa_abstract_declarator_tuple: // CFA
3201 cfa_abstract_tuple
3202 | type_qualifier_list cfa_abstract_tuple
[4d51835]3203 { $$ = $2->addQualifiers( $1 ); }
[c0aa336]3204 | cfa_abstract_declarator_no_tuple
[4d51835]3205 ;
[b87a5ed]3206
[c0aa336]3207cfa_abstract_declarator_no_tuple: // CFA
3208 cfa_abstract_ptr
3209 | cfa_abstract_array
[4d51835]3210 ;
[b87a5ed]3211
[c0aa336]3212cfa_abstract_ptr: // CFA
[dd51906]3213 ptrref_operator type_specifier
[ce8c12f]3214 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[dd51906]3215 | type_qualifier_list ptrref_operator type_specifier
[ce8c12f]3216 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[c0aa336]3217 | ptrref_operator cfa_abstract_function
[ce8c12f]3218 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c0aa336]3219 | type_qualifier_list ptrref_operator cfa_abstract_function
[ce8c12f]3220 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[c0aa336]3221 | ptrref_operator cfa_abstract_declarator_tuple
[ce8c12f]3222 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
[c0aa336]3223 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
[ce8c12f]3224 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
[4d51835]3225 ;
[b87a5ed]3226
[c0aa336]3227cfa_abstract_array: // CFA
[de62360d]3228 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3229 // empty (void) function return type.
[2871210]3230 '[' ']' type_specifier
[2298f728]3231 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
[2871210]3232 | '[' ']' multi_array_dimension type_specifier
[2298f728]3233 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
[4d51835]3234 | multi_array_dimension type_specifier
3235 { $$ = $2->addNewArray( $1 ); }
[c0aa336]3236 | '[' ']' cfa_abstract_ptr
[2298f728]3237 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
[c0aa336]3238 | '[' ']' multi_array_dimension cfa_abstract_ptr
[2298f728]3239 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
[c0aa336]3240 | multi_array_dimension cfa_abstract_ptr
[4d51835]3241 { $$ = $2->addNewArray( $1 ); }
3242 ;
[b87a5ed]3243
[c0aa336]3244cfa_abstract_tuple: // CFA
[c0a33d2]3245 '[' push cfa_abstract_parameter_list pop ']'
3246 { $$ = DeclarationNode::newTuple( $3 ); }
[35718a9]3247 | '[' push type_specifier_nobody ELLIPSIS pop ']'
[13e8427]3248 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
[35718a9]3249 | '[' push type_specifier_nobody ELLIPSIS constant_expression pop ']'
[13e8427]3250 { SemanticError( yylloc, "Tuple array currently unimplemented." ); $$ = nullptr; }
[4d51835]3251 ;
[b87a5ed]3252
[c0aa336]3253cfa_abstract_function: // CFA
[40de461]3254// '[' ']' '(' cfa_parameter_ellipsis_list_opt ')'
[1b29996]3255// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
[40de461]3256 cfa_abstract_tuple '(' push cfa_parameter_ellipsis_list_opt pop ')'
[c0a33d2]3257 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
[40de461]3258 | cfa_function_return '(' push cfa_parameter_ellipsis_list_opt pop ')'
[c0a33d2]3259 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
[4d51835]3260 ;
[b87a5ed]3261
[de62360d]3262// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3263// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
[c11e31c]3264//
[de62360d]3265// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3266// the declaration specifiers in a declaration is an obsolescent feature."
[c11e31c]3267//
3268// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3269// prototype-format parameter type declarators) is an obsolescent feature."
3270//
[de62360d]3271// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3272// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
[51b73452]3273
[c11e31c]3274//************************* MISCELLANEOUS ********************************
[51b73452]3275
[b87a5ed]3276comma_opt: // redundant comma
[4d51835]3277 // empty
3278 | ','
3279 ;
[51b73452]3280
[994d080]3281default_initialize_opt:
[4d51835]3282 // empty
[58dd019]3283 { $$ = nullptr; }
[4d51835]3284 | '=' assignment_expression
3285 { $$ = $2; }
3286 ;
[51b73452]3287
3288%%
[a1c9ddd]3289
[c11e31c]3290// ----end of grammar----
[51b73452]3291
[c11e31c]3292// Local Variables: //
[b87a5ed]3293// mode: c++ //
[de62360d]3294// tab-width: 4 //
[c11e31c]3295// compile-command: "make install" //
3296// End: //
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