| 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // parser.yy -- |
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| 8 | // |
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| 9 | // Author : Peter A. Buhr |
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| 10 | // Created On : Sat Sep 1 20:22:55 2001 |
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| 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Mon Nov 27 17:23:35 2017 |
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| 13 | // Update Count : 2992 |
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| 14 | // |
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| 15 | |
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| 16 | // This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C |
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| 17 | // grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been |
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| 18 | // copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar. |
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| 19 | // In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax |
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| 20 | // that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks |
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| 21 | // required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions. |
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| 22 | |
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| 23 | // Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with |
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| 24 | // the grammar. |
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| 25 | |
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| 26 | // The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for: |
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| 27 | // |
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| 28 | // 1. designation with '=' (use ':' instead) |
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| 29 | // |
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| 30 | // Most of the syntactic extensions from ANSI90 to ANSI11 C are marked with the comment "C99/C11". This grammar also has |
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| 31 | // two levels of extensions. The first extensions cover most of the GCC C extensions, except for: |
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| 32 | // |
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| 33 | // 1. designation with and without '=' (use ':' instead) |
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| 34 | // 2. attributes not allowed in parenthesis of declarator |
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| 35 | // |
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| 36 | // All of the syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall |
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| 37 | // (CFA), which fixes several of C's outstanding problems and extends C with many modern language concepts. All of the |
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| 38 | // syntactic extensions for CFA C are marked with the comment "CFA". As noted above, there is one unreconcileable |
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| 39 | // parsing problem between C99 and CFA with respect to designators; this is discussed in detail before the "designation" |
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| 40 | // grammar rule. |
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| 41 | |
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| 42 | %{ |
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| 43 | #define YYDEBUG_LEXER_TEXT (yylval) // lexer loads this up each time |
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| 44 | #define YYDEBUG 1 // get the pretty debugging code to compile |
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| 45 | #define YYERROR_VERBOSE // more information in syntax errors |
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| 46 | |
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| 47 | #undef __GNUC_MINOR__ |
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| 48 | |
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| 49 | #include <cstdio> |
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| 50 | #include <stack> |
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| 51 | using namespace std; |
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| 52 | |
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| 53 | #include "ParseNode.h" |
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| 54 | #include "TypedefTable.h" |
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| 55 | #include "TypeData.h" |
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| 56 | #include "LinkageSpec.h" |
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| 57 | #include "Common/SemanticError.h" // error_str |
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| 58 | #include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo... |
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| 59 | |
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| 60 | extern DeclarationNode * parseTree; |
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| 61 | extern LinkageSpec::Spec linkage; |
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| 62 | extern TypedefTable typedefTable; |
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| 63 | |
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| 64 | stack< LinkageSpec::Spec > linkageStack; |
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| 65 | |
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| 66 | bool appendStr( string & to, string & from ) { |
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| 67 | // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that |
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| 68 | // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of |
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| 69 | // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is |
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| 70 | // easier to let the C compiler handle this case. |
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| 71 | // |
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| 72 | // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found |
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| 73 | // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match, |
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| 74 | // i.e., u"a" U"b" L"c" is disallowed. |
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| 75 | |
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| 76 | if ( from[0] != '"' ) { // encoding ? |
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| 77 | if ( to[0] != '"' ) { // encoding ? |
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| 78 | if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ? |
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| 79 | yyerror( "non-matching string encodings for string-literal concatenation" ); |
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| 80 | return false; // parse error, must call YYERROR in action |
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| 81 | } else if ( from[1] == '8' ) { |
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| 82 | from.erase( 0, 1 ); // remove 2nd encoding |
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| 83 | } // if |
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| 84 | } else { |
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| 85 | if ( from[1] == '8' ) { // move encoding to start |
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| 86 | to = "u8" + to; |
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| 87 | from.erase( 0, 1 ); // remove 2nd encoding |
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| 88 | } else { |
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| 89 | to = from[0] + to; |
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| 90 | } // if |
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| 91 | } // if |
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| 92 | from.erase( 0, 1 ); // remove 2nd encoding |
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| 93 | } // if |
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| 94 | to += " " + from; // concatenated into single string |
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| 95 | return true; |
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| 96 | } // appendStr |
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| 97 | |
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| 98 | DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) { |
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| 99 | // distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__. |
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| 100 | DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( specifier ); |
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| 101 | //cur->addType( specifier ); |
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| 102 | for ( cur = dynamic_cast< DeclarationNode * >( cur->get_next() ); cur != nullptr; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) { |
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| 103 | cl->cloneBaseType( cur ); |
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| 104 | } // for |
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| 105 | declList->addType( cl ); |
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| 106 | // delete cl; |
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| 107 | return declList; |
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| 108 | } // distAttr |
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| 109 | |
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| 110 | void distExt( DeclarationNode * declaration ) { |
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| 111 | // distribute EXTENSION across all declarations |
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| 112 | for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) { |
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| 113 | iter->set_extension( true ); |
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| 114 | } // for |
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| 115 | } // distExt |
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| 116 | |
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| 117 | // There is an ambiguity for inline generic-routine return-types and generic routines. |
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| 118 | // forall( otype T ) struct S { int i; } bar( T ) {} |
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| 119 | // Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding. |
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| 120 | // forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {} |
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| 121 | |
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| 122 | void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) { |
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| 123 | if ( declSpec->type->kind == TypeData::Aggregate ) { // return is aggregate definition |
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| 124 | funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type |
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| 125 | declSpec->type->aggregate.params = nullptr; |
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| 126 | } // if |
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| 127 | } // rebindForall |
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| 128 | |
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| 129 | bool forall = false; // aggregate have one or more forall qualifiers ? |
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| 130 | |
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| 131 | // https://www.gnu.org/software/bison/manual/bison.html#Location-Type |
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| 132 | #define YYLLOC_DEFAULT(Cur, Rhs, N) \ |
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| 133 | if ( N ) { \ |
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| 134 | (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \ |
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| 135 | (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \ |
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| 136 | (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \ |
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| 137 | (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \ |
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| 138 | (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \ |
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| 139 | } else { \ |
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| 140 | (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \ |
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| 141 | (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \ |
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| 142 | (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \ |
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| 143 | } |
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| 144 | %} |
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| 145 | |
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| 146 | %define parse.error verbose |
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| 147 | |
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| 148 | // Types declaration for productions |
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| 149 | %union |
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| 150 | { |
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| 151 | Token tok; |
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| 152 | ParseNode * pn; |
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| 153 | ExpressionNode * en; |
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| 154 | DeclarationNode * decl; |
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| 155 | DeclarationNode::Aggregate aggKey; |
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| 156 | DeclarationNode::TypeClass tclass; |
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| 157 | StatementNode * sn; |
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| 158 | WaitForStmt * wfs; |
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| 159 | Expression * constant; |
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| 160 | IfCtl * ifctl; |
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| 161 | ForCtl * fctl; |
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| 162 | LabelNode * label; |
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| 163 | InitializerNode * in; |
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| 164 | OperKinds op; |
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| 165 | std::string * str; |
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| 166 | bool flag; |
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| 167 | CatchStmt::Kind catch_kind; |
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| 168 | } |
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| 169 | |
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| 170 | //************************* TERMINAL TOKENS ******************************** |
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| 171 | |
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| 172 | // keywords |
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| 173 | %token TYPEDEF |
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| 174 | %token EXTERN STATIC AUTO REGISTER |
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| 175 | %token THREADLOCAL // C11 |
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| 176 | %token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1) |
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| 177 | %token NORETURN // C11 |
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| 178 | %token CONST VOLATILE |
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| 179 | %token RESTRICT // C99 |
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| 180 | %token ATOMIC // C11 |
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| 181 | %token FORALL MUTEX VIRTUAL // CFA |
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| 182 | %token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED |
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| 183 | %token BOOL COMPLEX IMAGINARY // C99 |
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| 184 | %token INT128 FLOAT80 FLOAT128 // GCC |
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| 185 | %token ZERO_T ONE_T // CFA |
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| 186 | %token VALIST // GCC |
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| 187 | %token TYPEOF LABEL // GCC |
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| 188 | %token ENUM STRUCT UNION |
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| 189 | %token COROUTINE MONITOR THREAD // CFA |
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| 190 | %token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA |
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| 191 | %token SIZEOF OFFSETOF |
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| 192 | %token ATTRIBUTE EXTENSION // GCC |
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| 193 | %token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN |
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| 194 | %token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA |
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| 195 | %token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1) |
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| 196 | %token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11 |
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| 197 | |
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| 198 | // names and constants: lexer differentiates between identifier and typedef names |
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| 199 | %token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname |
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| 200 | %token<tok> TIMEOUT WOR |
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| 201 | %token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname |
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| 202 | %token<tok> INTEGERconstant CHARACTERconstant STRINGliteral |
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| 203 | // Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and |
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| 204 | // overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically |
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| 205 | // converted into the tuple index (.)(1). e.g., 3.x |
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| 206 | %token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant |
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| 207 | |
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| 208 | // multi-character operators |
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| 209 | %token ARROW // -> |
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| 210 | %token ICR DECR // ++ -- |
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| 211 | %token LS RS // << >> |
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| 212 | %token LE GE EQ NE // <= >= == != |
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| 213 | %token ANDAND OROR // && || |
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| 214 | %token ELLIPSIS // ... |
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| 215 | |
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| 216 | %token EXPassign MULTassign DIVassign MODassign // \= *= /= %= |
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| 217 | %token PLUSassign MINUSassign // += -= |
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| 218 | %token LSassign RSassign // <<= >>= |
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| 219 | %token ANDassign ERassign ORassign // &= ^= |= |
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| 220 | |
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| 221 | %token ATassign // @= |
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| 222 | |
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| 223 | %type<tok> identifier no_attr_identifier |
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| 224 | %type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name |
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| 225 | %type<tok> quasi_keyword |
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| 226 | %type<constant> string_literal |
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| 227 | %type<str> string_literal_list |
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| 228 | |
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| 229 | // expressions |
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| 230 | %type<en> constant |
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| 231 | %type<en> tuple tuple_expression_list |
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| 232 | %type<op> ptrref_operator unary_operator assignment_operator |
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| 233 | %type<en> primary_expression postfix_expression unary_expression |
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| 234 | %type<en> cast_expression exponential_expression multiplicative_expression additive_expression |
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| 235 | %type<en> shift_expression relational_expression equality_expression |
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| 236 | %type<en> AND_expression exclusive_OR_expression inclusive_OR_expression |
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| 237 | %type<en> logical_AND_expression logical_OR_expression |
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| 238 | %type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt |
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| 239 | %type<en> comma_expression comma_expression_opt |
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| 240 | %type<en> argument_expression_list argument_expression default_initialize_opt |
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| 241 | %type<ifctl> if_control_expression |
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| 242 | %type<fctl> for_control_expression |
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| 243 | %type<en> subrange |
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| 244 | %type<decl> asm_name_opt |
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| 245 | %type<en> asm_operands_opt asm_operands_list asm_operand |
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| 246 | %type<label> label_list |
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| 247 | %type<en> asm_clobbers_list_opt |
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| 248 | %type<flag> asm_volatile_opt |
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| 249 | %type<en> handler_predicate_opt |
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| 250 | |
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| 251 | // statements |
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| 252 | %type<sn> statement labeled_statement compound_statement |
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| 253 | %type<sn> statement_decl statement_decl_list statement_list_nodecl |
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| 254 | %type<sn> selection_statement |
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| 255 | %type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list |
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| 256 | %type<en> case_value |
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| 257 | %type<sn> case_clause case_value_list case_label case_label_list |
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| 258 | %type<sn> fall_through fall_through_opt |
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| 259 | %type<sn> iteration_statement jump_statement |
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| 260 | %type<sn> expression_statement asm_statement |
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| 261 | %type<sn> with_statement with_clause_opt |
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| 262 | %type<sn> exception_statement handler_clause finally_clause |
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| 263 | %type<catch_kind> handler_key |
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| 264 | %type<sn> mutex_statement |
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| 265 | %type<en> when_clause when_clause_opt waitfor timeout |
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| 266 | %type<sn> waitfor_statement |
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| 267 | %type<wfs> waitfor_clause |
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| 268 | |
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| 269 | // declarations |
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| 270 | %type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension |
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| 271 | %type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension |
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| 272 | %type<decl> abstract_parameter_declaration |
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| 273 | |
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| 274 | %type<aggKey> aggregate_key |
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| 275 | %type<decl> aggregate_type aggregate_type_nobody |
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| 276 | |
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| 277 | %type<decl> assertion assertion_list_opt |
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| 278 | |
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| 279 | %type<en> bit_subrange_size_opt bit_subrange_size |
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| 280 | |
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| 281 | %type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type |
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| 282 | |
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| 283 | %type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier |
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| 284 | |
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| 285 | %type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list |
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| 286 | %type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list |
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| 287 | |
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| 288 | %type<decl> elaborated_type elaborated_type_nobody |
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| 289 | |
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| 290 | %type<decl> enumerator_list enum_type enum_type_nobody |
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| 291 | %type<en> enumerator_value_opt |
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| 292 | |
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| 293 | %type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt |
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| 294 | |
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| 295 | %type<decl> field_declaration field_declaration_list field_declarator field_declaring_list |
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| 296 | %type<en> field field_list field_name fraction_constants |
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| 297 | |
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| 298 | %type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr |
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| 299 | |
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| 300 | %type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function |
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| 301 | %type<decl> identifier_list |
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| 302 | |
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| 303 | %type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple |
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| 304 | %type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list |
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| 305 | %type<decl> cfa_abstract_ptr cfa_abstract_tuple |
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| 306 | |
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| 307 | %type<decl> cfa_array_parameter_1st_dimension |
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| 308 | |
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| 309 | %type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list |
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| 310 | %type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier |
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| 311 | |
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| 312 | %type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple |
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| 313 | %type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr |
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| 314 | |
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| 315 | %type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list cfa_parameter_type_list_opt |
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| 316 | |
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| 317 | %type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier |
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| 318 | |
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| 319 | %type<decl> c_declaration |
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| 320 | %type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array |
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| 321 | %type<decl> KR_declaration_list KR_declaration_list_opt |
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| 322 | |
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| 323 | %type<decl> parameter_declaration parameter_list parameter_type_list |
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| 324 | %type<decl> parameter_type_list_opt |
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| 325 | |
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| 326 | %type<decl> paren_identifier paren_type |
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| 327 | |
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| 328 | %type<decl> storage_class storage_class_list |
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| 329 | |
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| 330 | %type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody |
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| 331 | |
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| 332 | %type<tclass> type_class |
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| 333 | %type<decl> type_declarator type_declarator_name type_declaring_list |
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| 334 | |
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| 335 | %type<decl> type_declaration_specifier type_type_specifier type_name typegen_name |
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| 336 | %type<decl> typedef typedef_declaration typedef_expression |
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| 337 | |
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| 338 | %type<decl> variable_type_redeclarator type_ptr type_array type_function |
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| 339 | |
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| 340 | %type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function |
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| 341 | |
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| 342 | %type<decl> type type_no_function |
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| 343 | %type<decl> type_parameter type_parameter_list type_initializer_opt |
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| 344 | |
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| 345 | %type<en> type_list |
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| 346 | |
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| 347 | %type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list |
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| 348 | %type<decl> type_specifier type_specifier_nobody |
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| 349 | |
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| 350 | %type<decl> variable_declarator variable_ptr variable_array variable_function |
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| 351 | %type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function |
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| 352 | |
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| 353 | %type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name |
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| 354 | |
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| 355 | // initializers |
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| 356 | %type<in> initializer initializer_list initializer_opt |
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| 357 | |
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| 358 | // designators |
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| 359 | %type<en> designator designator_list designation |
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| 360 | |
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| 361 | |
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| 362 | // Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous: |
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| 363 | // .---------. matches IF '(' comma_expression ')' statement . (reduce) |
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| 364 | // if ( C ) S1 else S2 |
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| 365 | // `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */ |
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| 366 | // Similar issues exit with the waitfor statement. |
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| 367 | |
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| 368 | // Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left |
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| 369 | // associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE. |
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| 370 | %precedence THEN // rule precedence for IF/WAITFOR statement |
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| 371 | %precedence WOR // token precedence for start of WOR in WAITFOR statement |
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| 372 | %precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement |
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| 373 | %precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement |
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| 374 | |
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| 375 | // Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous: |
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| 376 | // forall( otype T ) struct Foo { T v; }; |
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| 377 | // .-----. matches pointer to function returning a generic (which is impossible without a type) |
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| 378 | // Foo ( *fp )( int ); |
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| 379 | // `---' matches start of TYPEGENname '(' |
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| 380 | // Must be: |
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| 381 | // Foo( int ) ( *fp )( int ); |
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| 382 | |
|---|
| 383 | // Order of these lines matters (low-to-high precedence). |
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| 384 | %precedence TYPEGENname |
|---|
| 385 | %precedence '(' |
|---|
| 386 | |
|---|
| 387 | %locations // support location tracking for error messages |
|---|
| 388 | |
|---|
| 389 | %start translation_unit // parse-tree root |
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| 390 | |
|---|
| 391 | %% |
|---|
| 392 | //************************* Namespace Management ******************************** |
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| 393 | |
|---|
| 394 | // The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols |
|---|
| 395 | // "identifier", "TYPEDEFname", and "TYPEGENname" that are lexically identical. While it is possible to write a purely |
|---|
| 396 | // context-free grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. |
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| 397 | // Hence, this grammar uses the ANSI style. |
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| 398 | // |
|---|
| 399 | // Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those |
|---|
| 400 | // introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter |
|---|
| 401 | // type name creates a third class of identifiers that must be distinguished by the scanner. |
|---|
| 402 | // |
|---|
| 403 | // Since the scanner cannot distinguish among the different classes of identifiers without some context information, it |
|---|
| 404 | // accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic |
|---|
| 405 | // actions during the parser update this data structure when the class of identifiers change. |
|---|
| 406 | // |
|---|
| 407 | // Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a |
|---|
| 408 | // local scope; it must revert to its original class at the end of the block. Since type names can be local to a |
|---|
| 409 | // particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are |
|---|
| 410 | // local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in |
|---|
| 411 | // "typedef" or "otype" declarations). |
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| 412 | // |
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| 413 | // The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of |
|---|
| 414 | // scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur |
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| 415 | // within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point |
|---|
| 416 | // of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have |
|---|
| 417 | // enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra |
|---|
| 418 | // rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around |
|---|
| 419 | // "push" and "pop" nonterminals to resolve conflicts of this sort. |
|---|
| 420 | |
|---|
| 421 | push: |
|---|
| 422 | { typedefTable.enterScope(); } |
|---|
| 423 | ; |
|---|
| 424 | |
|---|
| 425 | pop: |
|---|
| 426 | { typedefTable.leaveScope(); } |
|---|
| 427 | ; |
|---|
| 428 | |
|---|
| 429 | //************************* CONSTANTS ******************************** |
|---|
| 430 | |
|---|
| 431 | constant: |
|---|
| 432 | // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant". |
|---|
| 433 | INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); } |
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| 434 | | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
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| 435 | | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
|---|
| 436 | | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
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| 437 | | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); } |
|---|
| 438 | ; |
|---|
| 439 | |
|---|
| 440 | quasi_keyword: // CFA |
|---|
| 441 | TIMEOUT |
|---|
| 442 | | WOR |
|---|
| 443 | ; |
|---|
| 444 | |
|---|
| 445 | identifier: |
|---|
| 446 | IDENTIFIER |
|---|
| 447 | | ATTR_IDENTIFIER // CFA |
|---|
| 448 | | quasi_keyword |
|---|
| 449 | ; |
|---|
| 450 | |
|---|
| 451 | no_attr_identifier: |
|---|
| 452 | IDENTIFIER |
|---|
| 453 | | quasi_keyword |
|---|
| 454 | ; |
|---|
| 455 | |
|---|
| 456 | string_literal: |
|---|
| 457 | string_literal_list { $$ = build_constantStr( *$1 ); } |
|---|
| 458 | ; |
|---|
| 459 | |
|---|
| 460 | string_literal_list: // juxtaposed strings are concatenated |
|---|
| 461 | STRINGliteral { $$ = $1; } // conversion from tok to str |
|---|
| 462 | | string_literal_list STRINGliteral |
|---|
| 463 | { |
|---|
| 464 | if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st |
|---|
| 465 | delete $2; // allocated by lexer |
|---|
| 466 | $$ = $1; // conversion from tok to str |
|---|
| 467 | } |
|---|
| 468 | ; |
|---|
| 469 | |
|---|
| 470 | //************************* EXPRESSIONS ******************************** |
|---|
| 471 | |
|---|
| 472 | primary_expression: |
|---|
| 473 | IDENTIFIER // typedef name cannot be used as a variable name |
|---|
| 474 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
|---|
| 475 | | quasi_keyword |
|---|
| 476 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
|---|
| 477 | | tuple |
|---|
| 478 | | '(' comma_expression ')' |
|---|
| 479 | { $$ = $2; } |
|---|
| 480 | | '(' compound_statement ')' // GCC, lambda expression |
|---|
| 481 | { $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); } |
|---|
| 482 | | type_name '.' no_attr_identifier // CFA, nested type |
|---|
| 483 | { throw SemanticError("Qualified names are currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 484 | | type_name '.' '[' push field_list pop ']' // CFA, nested type / tuple field selector |
|---|
| 485 | { throw SemanticError("Qualified names are currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 486 | ; |
|---|
| 487 | |
|---|
| 488 | postfix_expression: |
|---|
| 489 | primary_expression |
|---|
| 490 | | postfix_expression '[' push assignment_expression pop ']' |
|---|
| 491 | // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a |
|---|
| 492 | // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be |
|---|
| 493 | // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is |
|---|
| 494 | // equivalent to the old x[i,j]. |
|---|
| 495 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); } |
|---|
| 496 | | postfix_expression '{' argument_expression_list '}' // CFA, constructor call |
|---|
| 497 | { |
|---|
| 498 | Token fn; |
|---|
| 499 | fn.str = new std::string( "?{}" ); // location undefined - use location of '{'? |
|---|
| 500 | $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) ); |
|---|
| 501 | } |
|---|
| 502 | | postfix_expression '(' argument_expression_list ')' |
|---|
| 503 | { $$ = new ExpressionNode( build_func( $1, $3 ) ); } |
|---|
| 504 | | postfix_expression '.' no_attr_identifier |
|---|
| 505 | { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); } |
|---|
| 506 | | postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector |
|---|
| 507 | { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); } |
|---|
| 508 | | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index |
|---|
| 509 | { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); } |
|---|
| 510 | | postfix_expression ARROW no_attr_identifier |
|---|
| 511 | { |
|---|
| 512 | $$ = new ExpressionNode( build_pfieldSel( $1, *$3 == "0" || *$3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) ); |
|---|
| 513 | } |
|---|
| 514 | | postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector |
|---|
| 515 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); } |
|---|
| 516 | | postfix_expression ARROW INTEGERconstant // CFA, tuple index |
|---|
| 517 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); } |
|---|
| 518 | | postfix_expression ICR |
|---|
| 519 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); } |
|---|
| 520 | | postfix_expression DECR |
|---|
| 521 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); } |
|---|
| 522 | | '(' type_no_function ')' '{' initializer_list comma_opt '}' // C99, compound-literal |
|---|
| 523 | { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); } |
|---|
| 524 | | '^' primary_expression '{' argument_expression_list '}' // CFA |
|---|
| 525 | { |
|---|
| 526 | Token fn; |
|---|
| 527 | fn.str = new string( "^?{}" ); // location undefined |
|---|
| 528 | $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) ); |
|---|
| 529 | } |
|---|
| 530 | ; |
|---|
| 531 | |
|---|
| 532 | argument_expression_list: |
|---|
| 533 | argument_expression |
|---|
| 534 | | argument_expression_list ',' argument_expression |
|---|
| 535 | { $$ = (ExpressionNode *)( $1->set_last( $3 )); } |
|---|
| 536 | ; |
|---|
| 537 | |
|---|
| 538 | argument_expression: |
|---|
| 539 | // empty |
|---|
| 540 | { $$ = nullptr; } |
|---|
| 541 | // | '@' // use default argument |
|---|
| 542 | // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); } |
|---|
| 543 | | assignment_expression |
|---|
| 544 | ; |
|---|
| 545 | |
|---|
| 546 | field_list: // CFA, tuple field selector |
|---|
| 547 | field |
|---|
| 548 | | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
|---|
| 549 | ; |
|---|
| 550 | |
|---|
| 551 | field: // CFA, tuple field selector |
|---|
| 552 | field_name |
|---|
| 553 | | FLOATING_DECIMALconstant field |
|---|
| 554 | { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); } |
|---|
| 555 | | FLOATING_DECIMALconstant '[' push field_list pop ']' |
|---|
| 556 | { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); } |
|---|
| 557 | | field_name '.' field |
|---|
| 558 | { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); } |
|---|
| 559 | | field_name '.' '[' push field_list pop ']' |
|---|
| 560 | { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); } |
|---|
| 561 | | field_name ARROW field |
|---|
| 562 | { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); } |
|---|
| 563 | | field_name ARROW '[' push field_list pop ']' |
|---|
| 564 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); } |
|---|
| 565 | ; |
|---|
| 566 | |
|---|
| 567 | field_name: |
|---|
| 568 | INTEGERconstant fraction_constants |
|---|
| 569 | { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); } |
|---|
| 570 | | FLOATINGconstant fraction_constants |
|---|
| 571 | { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); } |
|---|
| 572 | | no_attr_identifier fraction_constants |
|---|
| 573 | { |
|---|
| 574 | $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) ); |
|---|
| 575 | } |
|---|
| 576 | ; |
|---|
| 577 | |
|---|
| 578 | fraction_constants: |
|---|
| 579 | // empty |
|---|
| 580 | { $$ = nullptr; } |
|---|
| 581 | | fraction_constants FLOATING_FRACTIONconstant |
|---|
| 582 | { |
|---|
| 583 | Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 ); |
|---|
| 584 | $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant ); |
|---|
| 585 | } |
|---|
| 586 | ; |
|---|
| 587 | |
|---|
| 588 | unary_expression: |
|---|
| 589 | postfix_expression |
|---|
| 590 | // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires |
|---|
| 591 | // semantics checks, e.g., ++3, 3--, *3, &&3 |
|---|
| 592 | | constant |
|---|
| 593 | { $$ = $1; } |
|---|
| 594 | | string_literal |
|---|
| 595 | { $$ = new ExpressionNode( $1 ); } |
|---|
| 596 | | EXTENSION cast_expression // GCC |
|---|
| 597 | { $$ = $2->set_extension( true ); } |
|---|
| 598 | // '*' ('&') is separated from unary_operator because of shift/reduce conflict in: |
|---|
| 599 | // { * X; } // dereference X |
|---|
| 600 | // { * int X; } // CFA declaration of pointer to int |
|---|
| 601 | | ptrref_operator cast_expression // CFA |
|---|
| 602 | { |
|---|
| 603 | switch ( $1 ) { |
|---|
| 604 | case OperKinds::AddressOf: |
|---|
| 605 | $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ); |
|---|
| 606 | break; |
|---|
| 607 | case OperKinds::PointTo: |
|---|
| 608 | $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); |
|---|
| 609 | break; |
|---|
| 610 | case OperKinds::And: |
|---|
| 611 | $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ) ); |
|---|
| 612 | break; |
|---|
| 613 | default: |
|---|
| 614 | assert( false ); |
|---|
| 615 | } |
|---|
| 616 | } |
|---|
| 617 | | unary_operator cast_expression |
|---|
| 618 | { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); } |
|---|
| 619 | | ICR unary_expression |
|---|
| 620 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); } |
|---|
| 621 | | DECR unary_expression |
|---|
| 622 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); } |
|---|
| 623 | | SIZEOF unary_expression |
|---|
| 624 | { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild< Expression >( $2 ) ) ); } |
|---|
| 625 | | SIZEOF '(' type_no_function ')' |
|---|
| 626 | { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); } |
|---|
| 627 | | ALIGNOF unary_expression // GCC, variable alignment |
|---|
| 628 | { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild< Expression >( $2 ) ) ); } |
|---|
| 629 | | ALIGNOF '(' type_no_function ')' // GCC, type alignment |
|---|
| 630 | { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); } |
|---|
| 631 | | OFFSETOF '(' type_no_function ',' no_attr_identifier ')' |
|---|
| 632 | { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); } |
|---|
| 633 | | ATTR_IDENTIFIER |
|---|
| 634 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ) ) ); } |
|---|
| 635 | | ATTR_IDENTIFIER '(' argument_expression ')' |
|---|
| 636 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
|---|
| 637 | | ATTR_IDENTIFIER '(' type ')' |
|---|
| 638 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuildType( $3 ) ) ); } |
|---|
| 639 | ; |
|---|
| 640 | |
|---|
| 641 | ptrref_operator: |
|---|
| 642 | '*' { $$ = OperKinds::PointTo; } |
|---|
| 643 | | '&' { $$ = OperKinds::AddressOf; } |
|---|
| 644 | // GCC, address of label must be handled by semantic check for ref,ref,label |
|---|
| 645 | | ANDAND { $$ = OperKinds::And; } |
|---|
| 646 | ; |
|---|
| 647 | |
|---|
| 648 | unary_operator: |
|---|
| 649 | '+' { $$ = OperKinds::UnPlus; } |
|---|
| 650 | | '-' { $$ = OperKinds::UnMinus; } |
|---|
| 651 | | '!' { $$ = OperKinds::Neg; } |
|---|
| 652 | | '~' { $$ = OperKinds::BitNeg; } |
|---|
| 653 | ; |
|---|
| 654 | |
|---|
| 655 | cast_expression: |
|---|
| 656 | unary_expression |
|---|
| 657 | | '(' type_no_function ')' cast_expression |
|---|
| 658 | { $$ = new ExpressionNode( build_cast( $2, $4 ) ); } |
|---|
| 659 | // VIRTUAL cannot be opt because of look ahead issues |
|---|
| 660 | | '(' VIRTUAL ')' cast_expression |
|---|
| 661 | { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $4 ), maybeMoveBuildType( nullptr ) ) ); } |
|---|
| 662 | | '(' VIRTUAL type_no_function ')' cast_expression |
|---|
| 663 | { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $5 ), maybeMoveBuildType( $3 ) ) ); } |
|---|
| 664 | // | '(' type_no_function ')' tuple |
|---|
| 665 | // { $$ = new ExpressionNode( build_cast( $2, $4 ) ); } |
|---|
| 666 | ; |
|---|
| 667 | |
|---|
| 668 | exponential_expression: |
|---|
| 669 | cast_expression |
|---|
| 670 | | exponential_expression '\\' cast_expression |
|---|
| 671 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); } |
|---|
| 672 | ; |
|---|
| 673 | |
|---|
| 674 | multiplicative_expression: |
|---|
| 675 | exponential_expression |
|---|
| 676 | | multiplicative_expression '*' exponential_expression |
|---|
| 677 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); } |
|---|
| 678 | | multiplicative_expression '/' exponential_expression |
|---|
| 679 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); } |
|---|
| 680 | | multiplicative_expression '%' exponential_expression |
|---|
| 681 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); } |
|---|
| 682 | ; |
|---|
| 683 | |
|---|
| 684 | additive_expression: |
|---|
| 685 | multiplicative_expression |
|---|
| 686 | | additive_expression '+' multiplicative_expression |
|---|
| 687 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); } |
|---|
| 688 | | additive_expression '-' multiplicative_expression |
|---|
| 689 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); } |
|---|
| 690 | ; |
|---|
| 691 | |
|---|
| 692 | shift_expression: |
|---|
| 693 | additive_expression |
|---|
| 694 | | shift_expression LS additive_expression |
|---|
| 695 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); } |
|---|
| 696 | | shift_expression RS additive_expression |
|---|
| 697 | { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); } |
|---|
| 698 | ; |
|---|
| 699 | |
|---|
| 700 | relational_expression: |
|---|
| 701 | shift_expression |
|---|
| 702 | | relational_expression '<' shift_expression |
|---|
| 703 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); } |
|---|
| 704 | | relational_expression '>' shift_expression |
|---|
| 705 | { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); } |
|---|
| 706 | | relational_expression LE shift_expression |
|---|
| 707 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); } |
|---|
| 708 | | relational_expression GE shift_expression |
|---|
| 709 | { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); } |
|---|
| 710 | ; |
|---|
| 711 | |
|---|
| 712 | equality_expression: |
|---|
| 713 | relational_expression |
|---|
| 714 | | equality_expression EQ relational_expression |
|---|
| 715 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); } |
|---|
| 716 | | equality_expression NE relational_expression |
|---|
| 717 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); } |
|---|
| 718 | ; |
|---|
| 719 | |
|---|
| 720 | AND_expression: |
|---|
| 721 | equality_expression |
|---|
| 722 | | AND_expression '&' equality_expression |
|---|
| 723 | { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); } |
|---|
| 724 | ; |
|---|
| 725 | |
|---|
| 726 | exclusive_OR_expression: |
|---|
| 727 | AND_expression |
|---|
| 728 | | exclusive_OR_expression '^' AND_expression |
|---|
| 729 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); } |
|---|
| 730 | ; |
|---|
| 731 | |
|---|
| 732 | inclusive_OR_expression: |
|---|
| 733 | exclusive_OR_expression |
|---|
| 734 | | inclusive_OR_expression '|' exclusive_OR_expression |
|---|
| 735 | { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); } |
|---|
| 736 | ; |
|---|
| 737 | |
|---|
| 738 | logical_AND_expression: |
|---|
| 739 | inclusive_OR_expression |
|---|
| 740 | | logical_AND_expression ANDAND inclusive_OR_expression |
|---|
| 741 | { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); } |
|---|
| 742 | ; |
|---|
| 743 | |
|---|
| 744 | logical_OR_expression: |
|---|
| 745 | logical_AND_expression |
|---|
| 746 | | logical_OR_expression OROR logical_AND_expression |
|---|
| 747 | { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); } |
|---|
| 748 | ; |
|---|
| 749 | |
|---|
| 750 | conditional_expression: |
|---|
| 751 | logical_OR_expression |
|---|
| 752 | | logical_OR_expression '?' comma_expression ':' conditional_expression |
|---|
| 753 | { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); } |
|---|
| 754 | // FIX ME: this hack computes $1 twice |
|---|
| 755 | | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand |
|---|
| 756 | { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); } |
|---|
| 757 | ; |
|---|
| 758 | |
|---|
| 759 | constant_expression: |
|---|
| 760 | conditional_expression |
|---|
| 761 | ; |
|---|
| 762 | |
|---|
| 763 | assignment_expression: |
|---|
| 764 | // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples |
|---|
| 765 | conditional_expression |
|---|
| 766 | | unary_expression assignment_operator assignment_expression |
|---|
| 767 | { $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); } |
|---|
| 768 | ; |
|---|
| 769 | |
|---|
| 770 | assignment_expression_opt: |
|---|
| 771 | // empty |
|---|
| 772 | { $$ = nullptr; } |
|---|
| 773 | | assignment_expression |
|---|
| 774 | ; |
|---|
| 775 | |
|---|
| 776 | assignment_operator: |
|---|
| 777 | '=' { $$ = OperKinds::Assign; } |
|---|
| 778 | | ATassign { $$ = OperKinds::AtAssn; } |
|---|
| 779 | | EXPassign { $$ = OperKinds::ExpAssn; } |
|---|
| 780 | | MULTassign { $$ = OperKinds::MulAssn; } |
|---|
| 781 | | DIVassign { $$ = OperKinds::DivAssn; } |
|---|
| 782 | | MODassign { $$ = OperKinds::ModAssn; } |
|---|
| 783 | | PLUSassign { $$ = OperKinds::PlusAssn; } |
|---|
| 784 | | MINUSassign { $$ = OperKinds::MinusAssn; } |
|---|
| 785 | | LSassign { $$ = OperKinds::LSAssn; } |
|---|
| 786 | | RSassign { $$ = OperKinds::RSAssn; } |
|---|
| 787 | | ANDassign { $$ = OperKinds::AndAssn; } |
|---|
| 788 | | ERassign { $$ = OperKinds::ERAssn; } |
|---|
| 789 | | ORassign { $$ = OperKinds::OrAssn; } |
|---|
| 790 | ; |
|---|
| 791 | |
|---|
| 792 | tuple: // CFA, tuple |
|---|
| 793 | // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with |
|---|
| 794 | // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array |
|---|
| 795 | // '[' ']' |
|---|
| 796 | // { $$ = new ExpressionNode( build_tuple() ); } |
|---|
| 797 | // '[' push assignment_expression pop ']' |
|---|
| 798 | // { $$ = new ExpressionNode( build_tuple( $3 ) ); } |
|---|
| 799 | '[' push ',' tuple_expression_list pop ']' |
|---|
| 800 | { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); } |
|---|
| 801 | | '[' push assignment_expression ',' tuple_expression_list pop ']' |
|---|
| 802 | { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); } |
|---|
| 803 | ; |
|---|
| 804 | |
|---|
| 805 | tuple_expression_list: |
|---|
| 806 | assignment_expression_opt |
|---|
| 807 | | tuple_expression_list ',' assignment_expression_opt |
|---|
| 808 | { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
|---|
| 809 | ; |
|---|
| 810 | |
|---|
| 811 | comma_expression: |
|---|
| 812 | assignment_expression |
|---|
| 813 | | comma_expression ',' assignment_expression |
|---|
| 814 | { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
|---|
| 815 | ; |
|---|
| 816 | |
|---|
| 817 | comma_expression_opt: |
|---|
| 818 | // empty |
|---|
| 819 | { $$ = nullptr; } |
|---|
| 820 | | comma_expression |
|---|
| 821 | ; |
|---|
| 822 | |
|---|
| 823 | //*************************** STATEMENTS ******************************* |
|---|
| 824 | |
|---|
| 825 | statement: |
|---|
| 826 | labeled_statement |
|---|
| 827 | | compound_statement |
|---|
| 828 | | expression_statement { $$ = $1; } |
|---|
| 829 | | selection_statement |
|---|
| 830 | | iteration_statement |
|---|
| 831 | | jump_statement |
|---|
| 832 | | with_statement |
|---|
| 833 | | mutex_statement |
|---|
| 834 | | waitfor_statement |
|---|
| 835 | | exception_statement |
|---|
| 836 | | asm_statement |
|---|
| 837 | |
|---|
| 838 | labeled_statement: |
|---|
| 839 | // labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER |
|---|
| 840 | identifier_or_type_name ':' attribute_list_opt statement |
|---|
| 841 | { |
|---|
| 842 | $$ = $4->add_label( $1, $3 ); |
|---|
| 843 | } |
|---|
| 844 | ; |
|---|
| 845 | |
|---|
| 846 | compound_statement: |
|---|
| 847 | '{' '}' |
|---|
| 848 | { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); } |
|---|
| 849 | | '{' |
|---|
| 850 | // Two scopes are necessary because the block itself has a scope, but every declaration within the block also |
|---|
| 851 | // requires its own scope. |
|---|
| 852 | push push |
|---|
| 853 | local_label_declaration_opt // GCC, local labels |
|---|
| 854 | statement_decl_list // C99, intermix declarations and statements |
|---|
| 855 | pop '}' |
|---|
| 856 | { $$ = new StatementNode( build_compound( $5 ) ); } |
|---|
| 857 | ; |
|---|
| 858 | |
|---|
| 859 | statement_decl_list: // C99 |
|---|
| 860 | statement_decl |
|---|
| 861 | | statement_decl_list push statement_decl |
|---|
| 862 | { if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } } |
|---|
| 863 | ; |
|---|
| 864 | |
|---|
| 865 | statement_decl: |
|---|
| 866 | declaration // CFA, new & old style declarations |
|---|
| 867 | { $$ = new StatementNode( $1 ); } |
|---|
| 868 | | EXTENSION declaration // GCC |
|---|
| 869 | { |
|---|
| 870 | distExt( $2 ); |
|---|
| 871 | $$ = new StatementNode( $2 ); |
|---|
| 872 | } |
|---|
| 873 | | function_definition |
|---|
| 874 | { $$ = new StatementNode( $1 ); } |
|---|
| 875 | | EXTENSION function_definition // GCC |
|---|
| 876 | { |
|---|
| 877 | distExt( $2 ); |
|---|
| 878 | $$ = new StatementNode( $2 ); |
|---|
| 879 | } |
|---|
| 880 | | statement pop |
|---|
| 881 | ; |
|---|
| 882 | |
|---|
| 883 | statement_list_nodecl: |
|---|
| 884 | statement |
|---|
| 885 | | statement_list_nodecl statement |
|---|
| 886 | { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } } |
|---|
| 887 | ; |
|---|
| 888 | |
|---|
| 889 | expression_statement: |
|---|
| 890 | comma_expression_opt ';' |
|---|
| 891 | { $$ = new StatementNode( build_expr( $1 ) ); } |
|---|
| 892 | ; |
|---|
| 893 | |
|---|
| 894 | selection_statement: |
|---|
| 895 | IF '(' push if_control_expression ')' statement %prec THEN |
|---|
| 896 | // explicitly deal with the shift/reduce conflict on if/else |
|---|
| 897 | { $$ = new StatementNode( build_if( $4, $6, nullptr ) ); } |
|---|
| 898 | | IF '(' push if_control_expression ')' statement ELSE statement |
|---|
| 899 | { $$ = new StatementNode( build_if( $4, $6, $8 ) ); } |
|---|
| 900 | | SWITCH '(' comma_expression ')' case_clause |
|---|
| 901 | { $$ = new StatementNode( build_switch( $3, $5 ) ); } |
|---|
| 902 | | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA |
|---|
| 903 | { |
|---|
| 904 | StatementNode *sw = new StatementNode( build_switch( $3, $8 ) ); |
|---|
| 905 | // The semantics of the declaration list is changed to include associated initialization, which is performed |
|---|
| 906 | // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound |
|---|
| 907 | // statement around the switch. Statements after the initial declaration list can never be executed, and |
|---|
| 908 | // therefore, are removed from the grammar even though C allows it. The change also applies to choose |
|---|
| 909 | // statement. |
|---|
| 910 | $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw; |
|---|
| 911 | } |
|---|
| 912 | | CHOOSE '(' comma_expression ')' case_clause // CFA |
|---|
| 913 | { $$ = new StatementNode( build_switch( $3, $5 ) ); } |
|---|
| 914 | | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA |
|---|
| 915 | { |
|---|
| 916 | StatementNode *sw = new StatementNode( build_switch( $3, $8 ) ); |
|---|
| 917 | $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw; |
|---|
| 918 | } |
|---|
| 919 | ; |
|---|
| 920 | |
|---|
| 921 | if_control_expression: |
|---|
| 922 | comma_expression pop |
|---|
| 923 | { $$ = new IfCtl( nullptr, $1 ); } |
|---|
| 924 | | c_declaration pop // no semi-colon |
|---|
| 925 | { $$ = new IfCtl( $1, nullptr ); } |
|---|
| 926 | | cfa_declaration pop // no semi-colon |
|---|
| 927 | { $$ = new IfCtl( $1, nullptr ); } |
|---|
| 928 | | declaration comma_expression // semi-colon separated |
|---|
| 929 | { $$ = new IfCtl( $1, $2 ); } |
|---|
| 930 | ; |
|---|
| 931 | |
|---|
| 932 | // CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case |
|---|
| 933 | // clause allows a list of values and subranges. |
|---|
| 934 | |
|---|
| 935 | case_value: // CFA |
|---|
| 936 | constant_expression { $$ = $1; } |
|---|
| 937 | | constant_expression ELLIPSIS constant_expression // GCC, subrange |
|---|
| 938 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
|---|
| 939 | | subrange // CFA, subrange |
|---|
| 940 | ; |
|---|
| 941 | |
|---|
| 942 | case_value_list: // CFA |
|---|
| 943 | case_value { $$ = new StatementNode( build_case( $1 ) ); } |
|---|
| 944 | // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5" |
|---|
| 945 | | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); } |
|---|
| 946 | ; |
|---|
| 947 | |
|---|
| 948 | case_label: // CFA |
|---|
| 949 | CASE case_value_list ':' { $$ = $2; } |
|---|
| 950 | | DEFAULT ':' { $$ = new StatementNode( build_default() ); } |
|---|
| 951 | // A semantic check is required to ensure only one default clause per switch/choose statement. |
|---|
| 952 | ; |
|---|
| 953 | |
|---|
| 954 | case_label_list: // CFA |
|---|
| 955 | case_label |
|---|
| 956 | | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); } |
|---|
| 957 | ; |
|---|
| 958 | |
|---|
| 959 | case_clause: // CFA |
|---|
| 960 | case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); } |
|---|
| 961 | ; |
|---|
| 962 | |
|---|
| 963 | switch_clause_list_opt: // CFA |
|---|
| 964 | // empty |
|---|
| 965 | { $$ = nullptr; } |
|---|
| 966 | | switch_clause_list |
|---|
| 967 | ; |
|---|
| 968 | |
|---|
| 969 | switch_clause_list: // CFA |
|---|
| 970 | case_label_list statement_list_nodecl |
|---|
| 971 | { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); } |
|---|
| 972 | | switch_clause_list case_label_list statement_list_nodecl |
|---|
| 973 | { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); } |
|---|
| 974 | ; |
|---|
| 975 | |
|---|
| 976 | choose_clause_list_opt: // CFA |
|---|
| 977 | // empty |
|---|
| 978 | { $$ = nullptr; } |
|---|
| 979 | | choose_clause_list |
|---|
| 980 | ; |
|---|
| 981 | |
|---|
| 982 | choose_clause_list: // CFA |
|---|
| 983 | case_label_list fall_through |
|---|
| 984 | { $$ = $1->append_last_case( $2 ); } |
|---|
| 985 | | case_label_list statement_list_nodecl fall_through_opt |
|---|
| 986 | { $$ = $1->append_last_case( new StatementNode( build_compound( (StatementNode *)$2->set_last( $3 ) ) ) ); } |
|---|
| 987 | | choose_clause_list case_label_list fall_through |
|---|
| 988 | { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( $3 ))); } |
|---|
| 989 | | choose_clause_list case_label_list statement_list_nodecl fall_through_opt |
|---|
| 990 | { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( (StatementNode *)$3->set_last( $4 ) ) ) ) ) ); } |
|---|
| 991 | ; |
|---|
| 992 | |
|---|
| 993 | fall_through_opt: // CFA |
|---|
| 994 | // empty |
|---|
| 995 | { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } // insert implicit break |
|---|
| 996 | | fall_through |
|---|
| 997 | ; |
|---|
| 998 | |
|---|
| 999 | fall_through_name: // CFA |
|---|
| 1000 | FALLTHRU |
|---|
| 1001 | | FALLTHROUGH |
|---|
| 1002 | ; |
|---|
| 1003 | |
|---|
| 1004 | fall_through: // CFA |
|---|
| 1005 | fall_through_name |
|---|
| 1006 | { $$ = nullptr; } |
|---|
| 1007 | | fall_through_name ';' |
|---|
| 1008 | { $$ = nullptr; } |
|---|
| 1009 | ; |
|---|
| 1010 | |
|---|
| 1011 | iteration_statement: |
|---|
| 1012 | WHILE '(' comma_expression ')' statement |
|---|
| 1013 | { $$ = new StatementNode( build_while( $3, $5 ) ); } |
|---|
| 1014 | | DO statement WHILE '(' comma_expression ')' ';' |
|---|
| 1015 | { $$ = new StatementNode( build_while( $5, $2, true ) ); } |
|---|
| 1016 | | FOR '(' push for_control_expression ')' statement |
|---|
| 1017 | { $$ = new StatementNode( build_for( $4, $6 ) ); } |
|---|
| 1018 | ; |
|---|
| 1019 | |
|---|
| 1020 | for_control_expression: |
|---|
| 1021 | comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt |
|---|
| 1022 | { $$ = new ForCtl( $1, $4, $6 ); } |
|---|
| 1023 | | declaration comma_expression_opt ';' comma_expression_opt // C99 |
|---|
| 1024 | { $$ = new ForCtl( $1, $2, $4 ); } |
|---|
| 1025 | ; |
|---|
| 1026 | |
|---|
| 1027 | jump_statement: |
|---|
| 1028 | GOTO identifier_or_type_name ';' |
|---|
| 1029 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); } |
|---|
| 1030 | | GOTO '*' comma_expression ';' // GCC, computed goto |
|---|
| 1031 | // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3); |
|---|
| 1032 | // whereas normal operator precedence yields goto (*i)+3; |
|---|
| 1033 | { $$ = new StatementNode( build_computedgoto( $3 ) ); } |
|---|
| 1034 | | CONTINUE ';' |
|---|
| 1035 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement. |
|---|
| 1036 | { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); } |
|---|
| 1037 | | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue |
|---|
| 1038 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and |
|---|
| 1039 | // the target of the transfer appears only at the start of an iteration statement. |
|---|
| 1040 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); } |
|---|
| 1041 | | BREAK ';' |
|---|
| 1042 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement. |
|---|
| 1043 | { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } |
|---|
| 1044 | | BREAK identifier_or_type_name ';' // CFA, multi-level exit |
|---|
| 1045 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and |
|---|
| 1046 | // the target of the transfer appears only at the start of an iteration statement. |
|---|
| 1047 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); } |
|---|
| 1048 | | RETURN comma_expression_opt ';' |
|---|
| 1049 | { $$ = new StatementNode( build_return( $2 ) ); } |
|---|
| 1050 | | THROW assignment_expression_opt ';' // handles rethrow |
|---|
| 1051 | { $$ = new StatementNode( build_throw( $2 ) ); } |
|---|
| 1052 | | THROWRESUME assignment_expression_opt ';' // handles reresume |
|---|
| 1053 | { $$ = new StatementNode( build_resume( $2 ) ); } |
|---|
| 1054 | | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume |
|---|
| 1055 | { $$ = new StatementNode( build_resume_at( $2, $4 ) ); } |
|---|
| 1056 | ; |
|---|
| 1057 | |
|---|
| 1058 | with_statement: |
|---|
| 1059 | WITH '(' tuple_expression_list ')' statement |
|---|
| 1060 | { throw SemanticError("With clause is currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 1061 | ; |
|---|
| 1062 | |
|---|
| 1063 | // If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex". |
|---|
| 1064 | mutex_statement: |
|---|
| 1065 | MUTEX '(' argument_expression_list ')' statement |
|---|
| 1066 | { throw SemanticError("Mutex statement is currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 1067 | ; |
|---|
| 1068 | |
|---|
| 1069 | when_clause: |
|---|
| 1070 | WHEN '(' comma_expression ')' |
|---|
| 1071 | { $$ = $3; } |
|---|
| 1072 | ; |
|---|
| 1073 | |
|---|
| 1074 | when_clause_opt: |
|---|
| 1075 | // empty |
|---|
| 1076 | { $$ = nullptr; } |
|---|
| 1077 | | when_clause |
|---|
| 1078 | ; |
|---|
| 1079 | |
|---|
| 1080 | waitfor: |
|---|
| 1081 | WAITFOR '(' identifier ')' |
|---|
| 1082 | { |
|---|
| 1083 | $$ = new ExpressionNode( new NameExpr( *$3 ) ); |
|---|
| 1084 | delete $3; |
|---|
| 1085 | } |
|---|
| 1086 | | WAITFOR '(' identifier ',' argument_expression_list ')' |
|---|
| 1087 | { |
|---|
| 1088 | $$ = new ExpressionNode( new NameExpr( *$3 ) ); |
|---|
| 1089 | $$->set_last( $5 ); |
|---|
| 1090 | delete $3; |
|---|
| 1091 | } |
|---|
| 1092 | ; |
|---|
| 1093 | |
|---|
| 1094 | timeout: |
|---|
| 1095 | TIMEOUT '(' comma_expression ')' |
|---|
| 1096 | { $$ = $3; } |
|---|
| 1097 | ; |
|---|
| 1098 | |
|---|
| 1099 | waitfor_clause: |
|---|
| 1100 | when_clause_opt waitfor statement %prec THEN |
|---|
| 1101 | { $$ = build_waitfor( $2, $3, $1 ); } |
|---|
| 1102 | | when_clause_opt waitfor statement WOR waitfor_clause |
|---|
| 1103 | { $$ = build_waitfor( $2, $3, $1, $5 ); } |
|---|
| 1104 | | when_clause_opt timeout statement %prec THEN |
|---|
| 1105 | { $$ = build_waitfor_timeout( $2, $3, $1 ); } |
|---|
| 1106 | | when_clause_opt ELSE statement |
|---|
| 1107 | { $$ = build_waitfor_timeout( nullptr, $3, $1 ); } |
|---|
| 1108 | // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless) |
|---|
| 1109 | | when_clause_opt timeout statement WOR when_clause ELSE statement |
|---|
| 1110 | { $$ = build_waitfor_timeout( $2, $3, $1, $7, $5 ); } |
|---|
| 1111 | ; |
|---|
| 1112 | |
|---|
| 1113 | waitfor_statement: |
|---|
| 1114 | when_clause_opt waitfor statement %prec THEN |
|---|
| 1115 | { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); } |
|---|
| 1116 | | when_clause_opt waitfor statement WOR waitfor_clause |
|---|
| 1117 | { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); } |
|---|
| 1118 | ; |
|---|
| 1119 | |
|---|
| 1120 | exception_statement: |
|---|
| 1121 | TRY compound_statement handler_clause |
|---|
| 1122 | { $$ = new StatementNode( build_try( $2, $3, 0 ) ); } |
|---|
| 1123 | | TRY compound_statement finally_clause |
|---|
| 1124 | { $$ = new StatementNode( build_try( $2, 0, $3 ) ); } |
|---|
| 1125 | | TRY compound_statement handler_clause finally_clause |
|---|
| 1126 | { $$ = new StatementNode( build_try( $2, $3, $4 ) ); } |
|---|
| 1127 | ; |
|---|
| 1128 | |
|---|
| 1129 | handler_clause: |
|---|
| 1130 | handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop |
|---|
| 1131 | { $$ = new StatementNode( build_catch( $1, $5, $7, $9 ) ); } |
|---|
| 1132 | | handler_clause handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop |
|---|
| 1133 | { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, $8, $10 ) ) ); } |
|---|
| 1134 | ; |
|---|
| 1135 | |
|---|
| 1136 | handler_predicate_opt: |
|---|
| 1137 | //empty |
|---|
| 1138 | { $$ = nullptr; } |
|---|
| 1139 | | ';' conditional_expression |
|---|
| 1140 | { $$ = $2; } |
|---|
| 1141 | ; |
|---|
| 1142 | |
|---|
| 1143 | handler_key: |
|---|
| 1144 | CATCH |
|---|
| 1145 | { $$ = CatchStmt::Terminate; } |
|---|
| 1146 | | CATCHRESUME |
|---|
| 1147 | { $$ = CatchStmt::Resume; } |
|---|
| 1148 | ; |
|---|
| 1149 | |
|---|
| 1150 | finally_clause: |
|---|
| 1151 | FINALLY compound_statement |
|---|
| 1152 | { |
|---|
| 1153 | $$ = new StatementNode( build_finally( $2 ) ); |
|---|
| 1154 | } |
|---|
| 1155 | ; |
|---|
| 1156 | |
|---|
| 1157 | exception_declaration: |
|---|
| 1158 | // No SUE declaration in parameter list. |
|---|
| 1159 | type_specifier_nobody |
|---|
| 1160 | | type_specifier_nobody declarator |
|---|
| 1161 | { |
|---|
| 1162 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1163 | $$ = $2->addType( $1 ); |
|---|
| 1164 | } |
|---|
| 1165 | | type_specifier_nobody variable_abstract_declarator |
|---|
| 1166 | { $$ = $2->addType( $1 ); } |
|---|
| 1167 | | cfa_abstract_declarator_tuple no_attr_identifier // CFA |
|---|
| 1168 | { |
|---|
| 1169 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1170 | $$ = $1->addName( $2 ); |
|---|
| 1171 | } |
|---|
| 1172 | | cfa_abstract_declarator_tuple // CFA |
|---|
| 1173 | ; |
|---|
| 1174 | |
|---|
| 1175 | asm_statement: |
|---|
| 1176 | ASM asm_volatile_opt '(' string_literal ')' ';' |
|---|
| 1177 | { $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); } |
|---|
| 1178 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC |
|---|
| 1179 | { $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); } |
|---|
| 1180 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';' |
|---|
| 1181 | { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); } |
|---|
| 1182 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';' |
|---|
| 1183 | { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); } |
|---|
| 1184 | | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';' |
|---|
| 1185 | { $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); } |
|---|
| 1186 | ; |
|---|
| 1187 | |
|---|
| 1188 | asm_volatile_opt: // GCC |
|---|
| 1189 | // empty |
|---|
| 1190 | { $$ = false; } |
|---|
| 1191 | | VOLATILE |
|---|
| 1192 | { $$ = true; } |
|---|
| 1193 | ; |
|---|
| 1194 | |
|---|
| 1195 | asm_operands_opt: // GCC |
|---|
| 1196 | // empty |
|---|
| 1197 | { $$ = nullptr; } // use default argument |
|---|
| 1198 | | asm_operands_list |
|---|
| 1199 | ; |
|---|
| 1200 | |
|---|
| 1201 | asm_operands_list: // GCC |
|---|
| 1202 | asm_operand |
|---|
| 1203 | | asm_operands_list ',' asm_operand |
|---|
| 1204 | { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
|---|
| 1205 | ; |
|---|
| 1206 | |
|---|
| 1207 | asm_operand: // GCC |
|---|
| 1208 | string_literal '(' constant_expression ')' |
|---|
| 1209 | { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ), $1, maybeMoveBuild< Expression >( $3 ) ) ); } |
|---|
| 1210 | | '[' constant_expression ']' string_literal '(' constant_expression ')' |
|---|
| 1211 | { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( $2 ), $4, maybeMoveBuild< Expression >( $6 ) ) ); } |
|---|
| 1212 | ; |
|---|
| 1213 | |
|---|
| 1214 | asm_clobbers_list_opt: // GCC |
|---|
| 1215 | // empty |
|---|
| 1216 | { $$ = nullptr; } // use default argument |
|---|
| 1217 | | string_literal |
|---|
| 1218 | { $$ = new ExpressionNode( $1 ); } |
|---|
| 1219 | | asm_clobbers_list_opt ',' string_literal |
|---|
| 1220 | // set_last returns ParseNode * |
|---|
| 1221 | { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); } |
|---|
| 1222 | ; |
|---|
| 1223 | |
|---|
| 1224 | label_list: |
|---|
| 1225 | no_attr_identifier |
|---|
| 1226 | { |
|---|
| 1227 | $$ = new LabelNode(); $$->labels.push_back( *$1 ); |
|---|
| 1228 | delete $1; // allocated by lexer |
|---|
| 1229 | } |
|---|
| 1230 | | label_list ',' no_attr_identifier |
|---|
| 1231 | { |
|---|
| 1232 | $$ = $1; $1->labels.push_back( *$3 ); |
|---|
| 1233 | delete $3; // allocated by lexer |
|---|
| 1234 | } |
|---|
| 1235 | ; |
|---|
| 1236 | |
|---|
| 1237 | //******************************* DECLARATIONS ********************************* |
|---|
| 1238 | |
|---|
| 1239 | declaration_list_opt: // used at beginning of switch statement |
|---|
| 1240 | pop |
|---|
| 1241 | { $$ = nullptr; } |
|---|
| 1242 | | declaration_list |
|---|
| 1243 | ; |
|---|
| 1244 | |
|---|
| 1245 | declaration_list: |
|---|
| 1246 | declaration |
|---|
| 1247 | | declaration_list push declaration |
|---|
| 1248 | { $$ = $1->appendList( $3 ); } |
|---|
| 1249 | ; |
|---|
| 1250 | |
|---|
| 1251 | KR_declaration_list_opt: // used to declare parameter types in K&R style functions |
|---|
| 1252 | // empty |
|---|
| 1253 | { $$ = nullptr; } |
|---|
| 1254 | | KR_declaration_list |
|---|
| 1255 | ; |
|---|
| 1256 | |
|---|
| 1257 | KR_declaration_list: |
|---|
| 1258 | push c_declaration pop ';' |
|---|
| 1259 | { $$ = $2; } |
|---|
| 1260 | | KR_declaration_list push c_declaration pop ';' |
|---|
| 1261 | { $$ = $1->appendList( $3 ); } |
|---|
| 1262 | ; |
|---|
| 1263 | |
|---|
| 1264 | local_label_declaration_opt: // GCC, local label |
|---|
| 1265 | // empty |
|---|
| 1266 | | local_label_declaration_list |
|---|
| 1267 | ; |
|---|
| 1268 | |
|---|
| 1269 | local_label_declaration_list: // GCC, local label |
|---|
| 1270 | LABEL local_label_list ';' |
|---|
| 1271 | | local_label_declaration_list LABEL local_label_list ';' |
|---|
| 1272 | ; |
|---|
| 1273 | |
|---|
| 1274 | local_label_list: // GCC, local label |
|---|
| 1275 | no_attr_identifier_or_type_name {} |
|---|
| 1276 | | local_label_list ',' no_attr_identifier_or_type_name {} |
|---|
| 1277 | ; |
|---|
| 1278 | |
|---|
| 1279 | declaration: // old & new style declarations |
|---|
| 1280 | c_declaration pop ';' |
|---|
| 1281 | | cfa_declaration pop ';' // CFA |
|---|
| 1282 | | STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11 |
|---|
| 1283 | { throw SemanticError("Static assert is currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 1284 | ; |
|---|
| 1285 | |
|---|
| 1286 | // C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function |
|---|
| 1287 | // declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to |
|---|
| 1288 | // the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration |
|---|
| 1289 | // modifiers are interpreted from left to right and the entire type specification is distributed across all variables in |
|---|
| 1290 | // the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program |
|---|
| 1291 | // block, but cannot be mixed within a specific declaration. |
|---|
| 1292 | // |
|---|
| 1293 | // CFA C |
|---|
| 1294 | // [10] int x; int x[10]; // array of 10 integers |
|---|
| 1295 | // [10] * char y; char *y[10]; // array of 10 pointers to char |
|---|
| 1296 | |
|---|
| 1297 | cfa_declaration: // CFA |
|---|
| 1298 | cfa_variable_declaration |
|---|
| 1299 | | cfa_typedef_declaration |
|---|
| 1300 | | cfa_function_declaration |
|---|
| 1301 | | type_declaring_list |
|---|
| 1302 | | trait_specifier |
|---|
| 1303 | ; |
|---|
| 1304 | |
|---|
| 1305 | cfa_variable_declaration: // CFA |
|---|
| 1306 | cfa_variable_specifier initializer_opt |
|---|
| 1307 | { |
|---|
| 1308 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1309 | $$ = $1->addInitializer( $2 ); |
|---|
| 1310 | } |
|---|
| 1311 | | declaration_qualifier_list cfa_variable_specifier initializer_opt |
|---|
| 1312 | // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude |
|---|
| 1313 | // them as a type_qualifier cannot appear in that context. |
|---|
| 1314 | { |
|---|
| 1315 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1316 | $$ = $2->addQualifiers( $1 )->addInitializer( $3 );; |
|---|
| 1317 | } |
|---|
| 1318 | | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt |
|---|
| 1319 | { |
|---|
| 1320 | typedefTable.addToEnclosingScope( *$5, TypedefTable::ID ); |
|---|
| 1321 | $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); |
|---|
| 1322 | } |
|---|
| 1323 | ; |
|---|
| 1324 | |
|---|
| 1325 | cfa_variable_specifier: // CFA |
|---|
| 1326 | // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
|---|
| 1327 | // storage-class |
|---|
| 1328 | cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt |
|---|
| 1329 | { |
|---|
| 1330 | typedefTable.setNextIdentifier( *$2 ); |
|---|
| 1331 | $$ = $1->addName( $2 )->addAsmName( $3 ); |
|---|
| 1332 | } |
|---|
| 1333 | | cfa_abstract_tuple identifier_or_type_name asm_name_opt |
|---|
| 1334 | { |
|---|
| 1335 | typedefTable.setNextIdentifier( *$2 ); |
|---|
| 1336 | $$ = $1->addName( $2 )->addAsmName( $3 ); |
|---|
| 1337 | } |
|---|
| 1338 | | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt |
|---|
| 1339 | { |
|---|
| 1340 | typedefTable.setNextIdentifier( *$3 ); |
|---|
| 1341 | $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); |
|---|
| 1342 | } |
|---|
| 1343 | ; |
|---|
| 1344 | |
|---|
| 1345 | cfa_function_declaration: // CFA |
|---|
| 1346 | cfa_function_specifier |
|---|
| 1347 | { |
|---|
| 1348 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1349 | $$ = $1; |
|---|
| 1350 | } |
|---|
| 1351 | | type_qualifier_list cfa_function_specifier |
|---|
| 1352 | { |
|---|
| 1353 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1354 | $$ = $2->addQualifiers( $1 ); |
|---|
| 1355 | } |
|---|
| 1356 | | declaration_qualifier_list cfa_function_specifier |
|---|
| 1357 | { |
|---|
| 1358 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1359 | $$ = $2->addQualifiers( $1 ); |
|---|
| 1360 | } |
|---|
| 1361 | | declaration_qualifier_list type_qualifier_list cfa_function_specifier |
|---|
| 1362 | { |
|---|
| 1363 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1364 | $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); |
|---|
| 1365 | } |
|---|
| 1366 | | cfa_function_declaration pop ',' push identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 1367 | { |
|---|
| 1368 | // Append the return type at the start (left-hand-side) to each identifier in the list. |
|---|
| 1369 | DeclarationNode * ret = new DeclarationNode; |
|---|
| 1370 | ret->type = maybeClone( $1->type->base ); |
|---|
| 1371 | $$ = $1->appendList( DeclarationNode::newFunction( $5, ret, $8, nullptr, true ) ); |
|---|
| 1372 | } |
|---|
| 1373 | ; |
|---|
| 1374 | |
|---|
| 1375 | cfa_function_specifier: // CFA |
|---|
| 1376 | // '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict |
|---|
| 1377 | // { |
|---|
| 1378 | // $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true ); |
|---|
| 1379 | // } |
|---|
| 1380 | // '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 1381 | // { |
|---|
| 1382 | // typedefTable.setNextIdentifier( *$5 ); |
|---|
| 1383 | // $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true ); |
|---|
| 1384 | // } |
|---|
| 1385 | // | '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 1386 | // { |
|---|
| 1387 | // typedefTable.setNextIdentifier( *$5 ); |
|---|
| 1388 | // $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true ); |
|---|
| 1389 | // } |
|---|
| 1390 | // | '[' ']' typegen_name |
|---|
| 1391 | // identifier_or_type_name must be broken apart because of the sequence: |
|---|
| 1392 | // |
|---|
| 1393 | // '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')' |
|---|
| 1394 | // '[' ']' type_specifier |
|---|
| 1395 | // |
|---|
| 1396 | // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be |
|---|
| 1397 | // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name. |
|---|
| 1398 | cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 1399 | // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator). |
|---|
| 1400 | { |
|---|
| 1401 | $$ = DeclarationNode::newFunction( $2, $1, $5, 0, true ); |
|---|
| 1402 | } |
|---|
| 1403 | | cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 1404 | { |
|---|
| 1405 | $$ = DeclarationNode::newFunction( $2, $1, $5, 0, true ); |
|---|
| 1406 | } |
|---|
| 1407 | ; |
|---|
| 1408 | |
|---|
| 1409 | cfa_function_return: // CFA |
|---|
| 1410 | '[' push cfa_parameter_list pop ']' |
|---|
| 1411 | { $$ = DeclarationNode::newTuple( $3 ); } |
|---|
| 1412 | | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']' |
|---|
| 1413 | // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the |
|---|
| 1414 | // ']'. |
|---|
| 1415 | { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); } |
|---|
| 1416 | ; |
|---|
| 1417 | |
|---|
| 1418 | cfa_typedef_declaration: // CFA |
|---|
| 1419 | TYPEDEF cfa_variable_specifier |
|---|
| 1420 | { |
|---|
| 1421 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1422 | $$ = $2->addTypedef(); |
|---|
| 1423 | } |
|---|
| 1424 | | TYPEDEF cfa_function_specifier |
|---|
| 1425 | { |
|---|
| 1426 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1427 | $$ = $2->addTypedef(); |
|---|
| 1428 | } |
|---|
| 1429 | | cfa_typedef_declaration pop ',' push no_attr_identifier |
|---|
| 1430 | { |
|---|
| 1431 | typedefTable.addToEnclosingScope( *$5, TypedefTable::TD ); |
|---|
| 1432 | $$ = $1->appendList( $1->cloneType( $5 ) ); |
|---|
| 1433 | } |
|---|
| 1434 | ; |
|---|
| 1435 | |
|---|
| 1436 | // Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as |
|---|
| 1437 | // a separate form of declaration, which syntactically precludes storage-class specifiers and initialization. |
|---|
| 1438 | |
|---|
| 1439 | typedef_declaration: |
|---|
| 1440 | TYPEDEF type_specifier declarator |
|---|
| 1441 | { |
|---|
| 1442 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1443 | $$ = $3->addType( $2 )->addTypedef(); |
|---|
| 1444 | } |
|---|
| 1445 | | typedef_declaration pop ',' push declarator |
|---|
| 1446 | { |
|---|
| 1447 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1448 | $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() ); |
|---|
| 1449 | } |
|---|
| 1450 | | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 ) |
|---|
| 1451 | { |
|---|
| 1452 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1453 | $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef(); |
|---|
| 1454 | } |
|---|
| 1455 | | type_specifier TYPEDEF declarator |
|---|
| 1456 | { |
|---|
| 1457 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1458 | $$ = $3->addType( $1 )->addTypedef(); |
|---|
| 1459 | } |
|---|
| 1460 | | type_specifier TYPEDEF type_qualifier_list declarator |
|---|
| 1461 | { |
|---|
| 1462 | typedefTable.addToEnclosingScope( TypedefTable::TD ); |
|---|
| 1463 | $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 ); |
|---|
| 1464 | } |
|---|
| 1465 | ; |
|---|
| 1466 | |
|---|
| 1467 | typedef_expression: |
|---|
| 1468 | // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression |
|---|
| 1469 | TYPEDEF no_attr_identifier '=' assignment_expression |
|---|
| 1470 | { |
|---|
| 1471 | typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); |
|---|
| 1472 | $$ = DeclarationNode::newName( 0 ); // unimplemented |
|---|
| 1473 | } |
|---|
| 1474 | | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression |
|---|
| 1475 | { |
|---|
| 1476 | typedefTable.addToEnclosingScope( *$5, TypedefTable::TD ); |
|---|
| 1477 | $$ = DeclarationNode::newName( 0 ); // unimplemented |
|---|
| 1478 | } |
|---|
| 1479 | ; |
|---|
| 1480 | |
|---|
| 1481 | //c_declaration: |
|---|
| 1482 | // declaring_list pop ';' |
|---|
| 1483 | // | typedef_declaration pop ';' |
|---|
| 1484 | // | typedef_expression pop ';' // GCC, naming expression type |
|---|
| 1485 | // | sue_declaration_specifier pop ';' |
|---|
| 1486 | // ; |
|---|
| 1487 | // |
|---|
| 1488 | //declaring_list: |
|---|
| 1489 | // // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
|---|
| 1490 | // // storage-class |
|---|
| 1491 | // declarator asm_name_opt initializer_opt |
|---|
| 1492 | // { |
|---|
| 1493 | // typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1494 | // $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 ); |
|---|
| 1495 | // } |
|---|
| 1496 | // | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt |
|---|
| 1497 | // { |
|---|
| 1498 | // typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1499 | // $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) ); |
|---|
| 1500 | // } |
|---|
| 1501 | // ; |
|---|
| 1502 | |
|---|
| 1503 | c_declaration: |
|---|
| 1504 | declaration_specifier declaring_list |
|---|
| 1505 | { |
|---|
| 1506 | $$ = distAttr( $1, $2 ); |
|---|
| 1507 | } |
|---|
| 1508 | | typedef_declaration |
|---|
| 1509 | | typedef_expression // GCC, naming expression type |
|---|
| 1510 | | sue_declaration_specifier |
|---|
| 1511 | ; |
|---|
| 1512 | |
|---|
| 1513 | declaring_list: |
|---|
| 1514 | // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
|---|
| 1515 | // storage-class |
|---|
| 1516 | declarator asm_name_opt initializer_opt |
|---|
| 1517 | { |
|---|
| 1518 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1519 | $$ = $1->addAsmName( $2 )->addInitializer( $3 ); |
|---|
| 1520 | } |
|---|
| 1521 | | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt |
|---|
| 1522 | { |
|---|
| 1523 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 1524 | $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); |
|---|
| 1525 | } |
|---|
| 1526 | ; |
|---|
| 1527 | |
|---|
| 1528 | declaration_specifier: // type specifier + storage class |
|---|
| 1529 | basic_declaration_specifier |
|---|
| 1530 | | sue_declaration_specifier |
|---|
| 1531 | | type_declaration_specifier |
|---|
| 1532 | ; |
|---|
| 1533 | |
|---|
| 1534 | declaration_specifier_nobody: // type specifier + storage class - {...} |
|---|
| 1535 | // Preclude SUE declarations in restricted scopes: |
|---|
| 1536 | // |
|---|
| 1537 | // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... } |
|---|
| 1538 | // |
|---|
| 1539 | // because it is impossible to call f due to name equivalence. |
|---|
| 1540 | basic_declaration_specifier |
|---|
| 1541 | | sue_declaration_specifier_nobody |
|---|
| 1542 | | type_declaration_specifier |
|---|
| 1543 | ; |
|---|
| 1544 | |
|---|
| 1545 | type_specifier: // type specifier |
|---|
| 1546 | basic_type_specifier |
|---|
| 1547 | | sue_type_specifier |
|---|
| 1548 | | type_type_specifier |
|---|
| 1549 | ; |
|---|
| 1550 | |
|---|
| 1551 | type_specifier_nobody: // type specifier - {...} |
|---|
| 1552 | // Preclude SUE declarations in restricted scopes: |
|---|
| 1553 | // |
|---|
| 1554 | // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... } |
|---|
| 1555 | // |
|---|
| 1556 | // because it is impossible to call f due to name equivalence. |
|---|
| 1557 | basic_type_specifier |
|---|
| 1558 | | sue_type_specifier_nobody |
|---|
| 1559 | | type_type_specifier |
|---|
| 1560 | ; |
|---|
| 1561 | |
|---|
| 1562 | type_qualifier_list_opt: // GCC, used in asm_statement |
|---|
| 1563 | // empty |
|---|
| 1564 | { $$ = nullptr; } |
|---|
| 1565 | | type_qualifier_list |
|---|
| 1566 | ; |
|---|
| 1567 | |
|---|
| 1568 | type_qualifier_list: |
|---|
| 1569 | // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration. |
|---|
| 1570 | // |
|---|
| 1571 | // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same |
|---|
| 1572 | // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it |
|---|
| 1573 | // appeared only once. |
|---|
| 1574 | type_qualifier |
|---|
| 1575 | | type_qualifier_list type_qualifier |
|---|
| 1576 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1577 | ; |
|---|
| 1578 | |
|---|
| 1579 | type_qualifier: |
|---|
| 1580 | type_qualifier_name |
|---|
| 1581 | | attribute |
|---|
| 1582 | ; |
|---|
| 1583 | |
|---|
| 1584 | type_qualifier_name: |
|---|
| 1585 | CONST |
|---|
| 1586 | { $$ = DeclarationNode::newTypeQualifier( Type::Const ); } |
|---|
| 1587 | | RESTRICT |
|---|
| 1588 | { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); } |
|---|
| 1589 | | VOLATILE |
|---|
| 1590 | { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); } |
|---|
| 1591 | | ATOMIC |
|---|
| 1592 | { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); } |
|---|
| 1593 | | forall |
|---|
| 1594 | ; |
|---|
| 1595 | |
|---|
| 1596 | forall: |
|---|
| 1597 | FORALL '(' |
|---|
| 1598 | { |
|---|
| 1599 | typedefTable.enterScope(); |
|---|
| 1600 | } |
|---|
| 1601 | type_parameter_list ')' // CFA |
|---|
| 1602 | { |
|---|
| 1603 | typedefTable.leaveScope(); |
|---|
| 1604 | $$ = DeclarationNode::newForall( $4 ); |
|---|
| 1605 | } |
|---|
| 1606 | ; |
|---|
| 1607 | |
|---|
| 1608 | declaration_qualifier_list: |
|---|
| 1609 | storage_class_list |
|---|
| 1610 | | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 ) |
|---|
| 1611 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1612 | | declaration_qualifier_list type_qualifier_list storage_class_list |
|---|
| 1613 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
|---|
| 1614 | ; |
|---|
| 1615 | |
|---|
| 1616 | storage_class_list: |
|---|
| 1617 | // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that |
|---|
| 1618 | // only one of each is specified, except for inline, which can appear with the others. |
|---|
| 1619 | // |
|---|
| 1620 | // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration |
|---|
| 1621 | // specifiers in a declaration. |
|---|
| 1622 | storage_class |
|---|
| 1623 | | storage_class_list storage_class |
|---|
| 1624 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1625 | ; |
|---|
| 1626 | |
|---|
| 1627 | storage_class: |
|---|
| 1628 | EXTERN |
|---|
| 1629 | { $$ = DeclarationNode::newStorageClass( Type::Extern ); } |
|---|
| 1630 | | STATIC |
|---|
| 1631 | { $$ = DeclarationNode::newStorageClass( Type::Static ); } |
|---|
| 1632 | | AUTO |
|---|
| 1633 | { $$ = DeclarationNode::newStorageClass( Type::Auto ); } |
|---|
| 1634 | | REGISTER |
|---|
| 1635 | { $$ = DeclarationNode::newStorageClass( Type::Register ); } |
|---|
| 1636 | | THREADLOCAL // C11 |
|---|
| 1637 | { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); } |
|---|
| 1638 | // Put function specifiers here to simplify parsing rules, but separate them semantically. |
|---|
| 1639 | | INLINE // C99 |
|---|
| 1640 | { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); } |
|---|
| 1641 | | FORTRAN // C99 |
|---|
| 1642 | { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); } |
|---|
| 1643 | | NORETURN // C11 |
|---|
| 1644 | { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); } |
|---|
| 1645 | ; |
|---|
| 1646 | |
|---|
| 1647 | basic_type_name: |
|---|
| 1648 | VOID |
|---|
| 1649 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); } |
|---|
| 1650 | | BOOL // C99 |
|---|
| 1651 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); } |
|---|
| 1652 | | CHAR |
|---|
| 1653 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); } |
|---|
| 1654 | | INT |
|---|
| 1655 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); } |
|---|
| 1656 | | INT128 |
|---|
| 1657 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); } |
|---|
| 1658 | | FLOAT |
|---|
| 1659 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); } |
|---|
| 1660 | | FLOAT80 |
|---|
| 1661 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float80 ); } |
|---|
| 1662 | | FLOAT128 |
|---|
| 1663 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float128 ); } |
|---|
| 1664 | | DOUBLE |
|---|
| 1665 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); } |
|---|
| 1666 | | COMPLEX // C99 |
|---|
| 1667 | { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); } |
|---|
| 1668 | | IMAGINARY // C99 |
|---|
| 1669 | { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); } |
|---|
| 1670 | | SIGNED |
|---|
| 1671 | { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); } |
|---|
| 1672 | | UNSIGNED |
|---|
| 1673 | { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); } |
|---|
| 1674 | | SHORT |
|---|
| 1675 | { $$ = DeclarationNode::newLength( DeclarationNode::Short ); } |
|---|
| 1676 | | LONG |
|---|
| 1677 | { $$ = DeclarationNode::newLength( DeclarationNode::Long ); } |
|---|
| 1678 | | ZERO_T |
|---|
| 1679 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); } |
|---|
| 1680 | | ONE_T |
|---|
| 1681 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); } |
|---|
| 1682 | | VALIST // GCC, __builtin_va_list |
|---|
| 1683 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); } |
|---|
| 1684 | ; |
|---|
| 1685 | |
|---|
| 1686 | basic_declaration_specifier: |
|---|
| 1687 | // A semantic check is necessary for conflicting storage classes. |
|---|
| 1688 | basic_type_specifier |
|---|
| 1689 | | declaration_qualifier_list basic_type_specifier |
|---|
| 1690 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1691 | | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
|---|
| 1692 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1693 | | basic_declaration_specifier storage_class type_qualifier_list |
|---|
| 1694 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
|---|
| 1695 | | basic_declaration_specifier storage_class basic_type_specifier |
|---|
| 1696 | { $$ = $3->addQualifiers( $2 )->addType( $1 ); } |
|---|
| 1697 | ; |
|---|
| 1698 | |
|---|
| 1699 | basic_type_specifier: |
|---|
| 1700 | direct_type |
|---|
| 1701 | | type_qualifier_list_opt indirect_type type_qualifier_list_opt |
|---|
| 1702 | { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); } |
|---|
| 1703 | ; |
|---|
| 1704 | |
|---|
| 1705 | direct_type: |
|---|
| 1706 | // A semantic check is necessary for conflicting type qualifiers. |
|---|
| 1707 | basic_type_name |
|---|
| 1708 | | type_qualifier_list basic_type_name |
|---|
| 1709 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1710 | | direct_type type_qualifier |
|---|
| 1711 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1712 | | direct_type basic_type_name |
|---|
| 1713 | { $$ = $1->addType( $2 ); } |
|---|
| 1714 | ; |
|---|
| 1715 | |
|---|
| 1716 | indirect_type: |
|---|
| 1717 | TYPEOF '(' type ')' // GCC: typeof(x) y; |
|---|
| 1718 | { $$ = $3; } |
|---|
| 1719 | | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y; |
|---|
| 1720 | { $$ = DeclarationNode::newTypeof( $3 ); } |
|---|
| 1721 | | ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y; |
|---|
| 1722 | { $$ = DeclarationNode::newAttr( $1, $3 ); } |
|---|
| 1723 | | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y; |
|---|
| 1724 | { $$ = DeclarationNode::newAttr( $1, $3 ); } |
|---|
| 1725 | ; |
|---|
| 1726 | |
|---|
| 1727 | sue_declaration_specifier: // struct, union, enum + storage class + type specifier |
|---|
| 1728 | sue_type_specifier |
|---|
| 1729 | | declaration_qualifier_list sue_type_specifier |
|---|
| 1730 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1731 | | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
|---|
| 1732 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1733 | | sue_declaration_specifier storage_class type_qualifier_list |
|---|
| 1734 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
|---|
| 1735 | ; |
|---|
| 1736 | |
|---|
| 1737 | sue_type_specifier: // struct, union, enum + type specifier |
|---|
| 1738 | elaborated_type |
|---|
| 1739 | | type_qualifier_list |
|---|
| 1740 | { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type |
|---|
| 1741 | elaborated_type |
|---|
| 1742 | { $$ = $3->addQualifiers( $1 ); } |
|---|
| 1743 | | sue_type_specifier type_qualifier |
|---|
| 1744 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1745 | ; |
|---|
| 1746 | |
|---|
| 1747 | sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier |
|---|
| 1748 | sue_type_specifier_nobody |
|---|
| 1749 | | declaration_qualifier_list sue_type_specifier_nobody |
|---|
| 1750 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1751 | | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2) |
|---|
| 1752 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1753 | | sue_declaration_specifier_nobody storage_class type_qualifier_list |
|---|
| 1754 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
|---|
| 1755 | ; |
|---|
| 1756 | |
|---|
| 1757 | sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier |
|---|
| 1758 | elaborated_type_nobody |
|---|
| 1759 | | type_qualifier_list elaborated_type_nobody |
|---|
| 1760 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1761 | | sue_type_specifier_nobody type_qualifier |
|---|
| 1762 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1763 | ; |
|---|
| 1764 | |
|---|
| 1765 | type_declaration_specifier: |
|---|
| 1766 | type_type_specifier |
|---|
| 1767 | | declaration_qualifier_list type_type_specifier |
|---|
| 1768 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1769 | | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
|---|
| 1770 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1771 | | type_declaration_specifier storage_class type_qualifier_list |
|---|
| 1772 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
|---|
| 1773 | ; |
|---|
| 1774 | |
|---|
| 1775 | type_type_specifier: // typedef types |
|---|
| 1776 | type_name |
|---|
| 1777 | | type_qualifier_list type_name |
|---|
| 1778 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 1779 | | type_type_specifier type_qualifier |
|---|
| 1780 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 1781 | ; |
|---|
| 1782 | |
|---|
| 1783 | type_name: |
|---|
| 1784 | TYPEDEFname |
|---|
| 1785 | { $$ = DeclarationNode::newFromTypedef( $1 ); } |
|---|
| 1786 | | '.' TYPEDEFname |
|---|
| 1787 | { $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME |
|---|
| 1788 | | type_name '.' TYPEDEFname |
|---|
| 1789 | { $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME |
|---|
| 1790 | | typegen_name |
|---|
| 1791 | | '.' typegen_name |
|---|
| 1792 | { $$ = $2; } // FIX ME |
|---|
| 1793 | | type_name '.' typegen_name |
|---|
| 1794 | { $$ = $3; } // FIX ME |
|---|
| 1795 | ; |
|---|
| 1796 | |
|---|
| 1797 | typegen_name: // CFA |
|---|
| 1798 | TYPEGENname |
|---|
| 1799 | { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); } |
|---|
| 1800 | | TYPEGENname '(' ')' |
|---|
| 1801 | { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); } |
|---|
| 1802 | | TYPEGENname '(' type_list ')' |
|---|
| 1803 | { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); } |
|---|
| 1804 | ; |
|---|
| 1805 | |
|---|
| 1806 | elaborated_type: // struct, union, enum |
|---|
| 1807 | aggregate_type |
|---|
| 1808 | | enum_type |
|---|
| 1809 | ; |
|---|
| 1810 | |
|---|
| 1811 | elaborated_type_nobody: // struct, union, enum - {...} |
|---|
| 1812 | aggregate_type_nobody |
|---|
| 1813 | | enum_type_nobody |
|---|
| 1814 | ; |
|---|
| 1815 | |
|---|
| 1816 | aggregate_type: // struct, union |
|---|
| 1817 | aggregate_key attribute_list_opt '{' field_declaration_list '}' |
|---|
| 1818 | { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); } |
|---|
| 1819 | | aggregate_key attribute_list_opt no_attr_identifier_or_type_name |
|---|
| 1820 | { |
|---|
| 1821 | typedefTable.makeTypedef( *$3 ); // create typedef |
|---|
| 1822 | if ( forall ) typedefTable.changeKind( *$3, TypedefTable::TG ); // possibly update |
|---|
| 1823 | forall = false; // reset |
|---|
| 1824 | } |
|---|
| 1825 | '{' field_declaration_list '}' |
|---|
| 1826 | { $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); } |
|---|
| 1827 | | aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list '}' // CFA |
|---|
| 1828 | { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); } |
|---|
| 1829 | | aggregate_type_nobody |
|---|
| 1830 | ; |
|---|
| 1831 | |
|---|
| 1832 | aggregate_type_nobody: // struct, union - {...} |
|---|
| 1833 | aggregate_key attribute_list_opt no_attr_identifier |
|---|
| 1834 | { |
|---|
| 1835 | typedefTable.makeTypedef( *$3 ); |
|---|
| 1836 | $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 ); |
|---|
| 1837 | } |
|---|
| 1838 | | aggregate_key attribute_list_opt TYPEDEFname |
|---|
| 1839 | { |
|---|
| 1840 | typedefTable.makeTypedef( *$3 ); |
|---|
| 1841 | $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 ); |
|---|
| 1842 | } |
|---|
| 1843 | | aggregate_key attribute_list_opt typegen_name // CFA |
|---|
| 1844 | { |
|---|
| 1845 | // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is |
|---|
| 1846 | // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and |
|---|
| 1847 | // delete newFromTypeGen. |
|---|
| 1848 | $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 ); |
|---|
| 1849 | $3->type->symbolic.name = nullptr; |
|---|
| 1850 | $3->type->symbolic.actuals = nullptr; |
|---|
| 1851 | delete $3; |
|---|
| 1852 | } |
|---|
| 1853 | ; |
|---|
| 1854 | |
|---|
| 1855 | aggregate_key: |
|---|
| 1856 | STRUCT |
|---|
| 1857 | { $$ = DeclarationNode::Struct; } |
|---|
| 1858 | | UNION |
|---|
| 1859 | { $$ = DeclarationNode::Union; } |
|---|
| 1860 | | COROUTINE |
|---|
| 1861 | { $$ = DeclarationNode::Coroutine; } |
|---|
| 1862 | | MONITOR |
|---|
| 1863 | { $$ = DeclarationNode::Monitor; } |
|---|
| 1864 | | THREAD |
|---|
| 1865 | { $$ = DeclarationNode::Thread; } |
|---|
| 1866 | ; |
|---|
| 1867 | |
|---|
| 1868 | field_declaration_list: |
|---|
| 1869 | // empty |
|---|
| 1870 | { $$ = nullptr; } |
|---|
| 1871 | | field_declaration_list field_declaration |
|---|
| 1872 | { $$ = $1 ? $1->appendList( $2 ) : $2; } |
|---|
| 1873 | ; |
|---|
| 1874 | |
|---|
| 1875 | field_declaration: |
|---|
| 1876 | cfa_field_declaring_list ';' // CFA, new style field declaration |
|---|
| 1877 | | EXTENSION cfa_field_declaring_list ';' // GCC |
|---|
| 1878 | { |
|---|
| 1879 | distExt( $2 ); // mark all fields in list |
|---|
| 1880 | $$ = $2; |
|---|
| 1881 | } |
|---|
| 1882 | | type_specifier field_declaring_list ';' |
|---|
| 1883 | { |
|---|
| 1884 | $$ = distAttr( $1, $2 ); } |
|---|
| 1885 | | EXTENSION type_specifier field_declaring_list ';' // GCC |
|---|
| 1886 | { |
|---|
| 1887 | distExt( $3 ); // mark all fields in list |
|---|
| 1888 | $$ = distAttr( $2, $3 ); |
|---|
| 1889 | } |
|---|
| 1890 | ; |
|---|
| 1891 | |
|---|
| 1892 | cfa_field_declaring_list: // CFA, new style field declaration |
|---|
| 1893 | cfa_abstract_declarator_tuple // CFA, no field name |
|---|
| 1894 | | cfa_abstract_declarator_tuple no_attr_identifier_or_type_name |
|---|
| 1895 | { $$ = $1->addName( $2 ); } |
|---|
| 1896 | | cfa_field_declaring_list ',' no_attr_identifier_or_type_name |
|---|
| 1897 | { $$ = $1->appendList( $1->cloneType( $3 ) ); } |
|---|
| 1898 | | cfa_field_declaring_list ',' // CFA, no field name |
|---|
| 1899 | { $$ = $1->appendList( $1->cloneType( 0 ) ); } |
|---|
| 1900 | ; |
|---|
| 1901 | |
|---|
| 1902 | field_declaring_list: |
|---|
| 1903 | field_declarator |
|---|
| 1904 | | field_declaring_list ',' attribute_list_opt field_declarator |
|---|
| 1905 | { $$ = $1->appendList( $4->addQualifiers( $3 ) ); } |
|---|
| 1906 | ; |
|---|
| 1907 | |
|---|
| 1908 | field_declarator: |
|---|
| 1909 | // empty |
|---|
| 1910 | { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name |
|---|
| 1911 | // '@' |
|---|
| 1912 | // { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name |
|---|
| 1913 | | bit_subrange_size // no field name |
|---|
| 1914 | { $$ = DeclarationNode::newBitfield( $1 ); } |
|---|
| 1915 | | variable_declarator bit_subrange_size_opt |
|---|
| 1916 | // A semantic check is required to ensure bit_subrange only appears on base type int. |
|---|
| 1917 | { $$ = $1->addBitfield( $2 ); } |
|---|
| 1918 | | variable_type_redeclarator bit_subrange_size_opt |
|---|
| 1919 | // A semantic check is required to ensure bit_subrange only appears on base type int. |
|---|
| 1920 | { $$ = $1->addBitfield( $2 ); } |
|---|
| 1921 | | variable_abstract_declarator // CFA, no field name |
|---|
| 1922 | ; |
|---|
| 1923 | |
|---|
| 1924 | bit_subrange_size_opt: |
|---|
| 1925 | // empty |
|---|
| 1926 | { $$ = nullptr; } |
|---|
| 1927 | | bit_subrange_size |
|---|
| 1928 | { $$ = $1; } |
|---|
| 1929 | ; |
|---|
| 1930 | |
|---|
| 1931 | bit_subrange_size: |
|---|
| 1932 | ':' constant_expression |
|---|
| 1933 | { $$ = $2; } |
|---|
| 1934 | ; |
|---|
| 1935 | |
|---|
| 1936 | enum_type: // enum |
|---|
| 1937 | ENUM attribute_list_opt '{' enumerator_list comma_opt '}' |
|---|
| 1938 | { $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); } |
|---|
| 1939 | | ENUM attribute_list_opt no_attr_identifier_or_type_name |
|---|
| 1940 | { typedefTable.makeTypedef( *$3 ); } |
|---|
| 1941 | '{' enumerator_list comma_opt '}' |
|---|
| 1942 | { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); } |
|---|
| 1943 | | enum_type_nobody |
|---|
| 1944 | ; |
|---|
| 1945 | |
|---|
| 1946 | enum_type_nobody: // enum - {...} |
|---|
| 1947 | ENUM attribute_list_opt no_attr_identifier_or_type_name |
|---|
| 1948 | { |
|---|
| 1949 | typedefTable.makeTypedef( *$3 ); |
|---|
| 1950 | $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 ); |
|---|
| 1951 | } |
|---|
| 1952 | ; |
|---|
| 1953 | |
|---|
| 1954 | enumerator_list: |
|---|
| 1955 | no_attr_identifier_or_type_name enumerator_value_opt |
|---|
| 1956 | { $$ = DeclarationNode::newEnumConstant( $1, $2 ); } |
|---|
| 1957 | | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt |
|---|
| 1958 | { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); } |
|---|
| 1959 | ; |
|---|
| 1960 | |
|---|
| 1961 | enumerator_value_opt: |
|---|
| 1962 | // empty |
|---|
| 1963 | { $$ = nullptr; } |
|---|
| 1964 | | '=' constant_expression |
|---|
| 1965 | { $$ = $2; } |
|---|
| 1966 | ; |
|---|
| 1967 | |
|---|
| 1968 | // Minimum of one parameter after which ellipsis is allowed only at the end. |
|---|
| 1969 | |
|---|
| 1970 | cfa_parameter_type_list_opt: // CFA |
|---|
| 1971 | // empty |
|---|
| 1972 | { $$ = nullptr; } |
|---|
| 1973 | | cfa_parameter_type_list |
|---|
| 1974 | ; |
|---|
| 1975 | |
|---|
| 1976 | cfa_parameter_type_list: // CFA, abstract + real |
|---|
| 1977 | cfa_abstract_parameter_list |
|---|
| 1978 | | cfa_parameter_list |
|---|
| 1979 | | cfa_parameter_list pop ',' push cfa_abstract_parameter_list |
|---|
| 1980 | { $$ = $1->appendList( $5 ); } |
|---|
| 1981 | | cfa_abstract_parameter_list pop ',' push ELLIPSIS |
|---|
| 1982 | { $$ = $1->addVarArgs(); } |
|---|
| 1983 | | cfa_parameter_list pop ',' push ELLIPSIS |
|---|
| 1984 | { $$ = $1->addVarArgs(); } |
|---|
| 1985 | ; |
|---|
| 1986 | |
|---|
| 1987 | cfa_parameter_list: // CFA |
|---|
| 1988 | // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is |
|---|
| 1989 | // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'. |
|---|
| 1990 | cfa_parameter_declaration |
|---|
| 1991 | | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration |
|---|
| 1992 | { $$ = $1->appendList( $5 ); } |
|---|
| 1993 | | cfa_parameter_list pop ',' push cfa_parameter_declaration |
|---|
| 1994 | { $$ = $1->appendList( $5 ); } |
|---|
| 1995 | | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration |
|---|
| 1996 | { $$ = $1->appendList( $5 )->appendList( $9 ); } |
|---|
| 1997 | ; |
|---|
| 1998 | |
|---|
| 1999 | cfa_abstract_parameter_list: // CFA, new & old style abstract |
|---|
| 2000 | cfa_abstract_parameter_declaration |
|---|
| 2001 | | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration |
|---|
| 2002 | { $$ = $1->appendList( $5 ); } |
|---|
| 2003 | ; |
|---|
| 2004 | |
|---|
| 2005 | parameter_type_list_opt: |
|---|
| 2006 | // empty |
|---|
| 2007 | { $$ = nullptr; } |
|---|
| 2008 | | parameter_type_list |
|---|
| 2009 | ; |
|---|
| 2010 | |
|---|
| 2011 | parameter_type_list: |
|---|
| 2012 | parameter_list |
|---|
| 2013 | | parameter_list pop ',' push ELLIPSIS |
|---|
| 2014 | { $$ = $1->addVarArgs(); } |
|---|
| 2015 | ; |
|---|
| 2016 | |
|---|
| 2017 | parameter_list: // abstract + real |
|---|
| 2018 | abstract_parameter_declaration |
|---|
| 2019 | | parameter_declaration |
|---|
| 2020 | | parameter_list pop ',' push abstract_parameter_declaration |
|---|
| 2021 | { $$ = $1->appendList( $5 ); } |
|---|
| 2022 | | parameter_list pop ',' push parameter_declaration |
|---|
| 2023 | { $$ = $1->appendList( $5 ); } |
|---|
| 2024 | ; |
|---|
| 2025 | |
|---|
| 2026 | // Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics |
|---|
| 2027 | // for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes. |
|---|
| 2028 | |
|---|
| 2029 | cfa_parameter_declaration: // CFA, new & old style parameter declaration |
|---|
| 2030 | parameter_declaration |
|---|
| 2031 | | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt |
|---|
| 2032 | { $$ = $1->addName( $2 ); } |
|---|
| 2033 | | cfa_abstract_tuple identifier_or_type_name default_initialize_opt |
|---|
| 2034 | // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator). |
|---|
| 2035 | { $$ = $1->addName( $2 ); } |
|---|
| 2036 | | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt |
|---|
| 2037 | { $$ = $2->addName( $3 )->addQualifiers( $1 ); } |
|---|
| 2038 | | cfa_function_specifier |
|---|
| 2039 | ; |
|---|
| 2040 | |
|---|
| 2041 | cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration |
|---|
| 2042 | abstract_parameter_declaration |
|---|
| 2043 | | cfa_identifier_parameter_declarator_no_tuple |
|---|
| 2044 | | cfa_abstract_tuple |
|---|
| 2045 | // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator). |
|---|
| 2046 | | type_qualifier_list cfa_abstract_tuple |
|---|
| 2047 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 2048 | | cfa_abstract_function |
|---|
| 2049 | ; |
|---|
| 2050 | |
|---|
| 2051 | parameter_declaration: |
|---|
| 2052 | // No SUE declaration in parameter list. |
|---|
| 2053 | declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt |
|---|
| 2054 | { |
|---|
| 2055 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2056 | $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); |
|---|
| 2057 | } |
|---|
| 2058 | | declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt |
|---|
| 2059 | { |
|---|
| 2060 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2061 | $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); |
|---|
| 2062 | } |
|---|
| 2063 | ; |
|---|
| 2064 | |
|---|
| 2065 | abstract_parameter_declaration: |
|---|
| 2066 | declaration_specifier_nobody default_initialize_opt |
|---|
| 2067 | { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); } |
|---|
| 2068 | | declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt |
|---|
| 2069 | { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); } |
|---|
| 2070 | ; |
|---|
| 2071 | |
|---|
| 2072 | // ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a |
|---|
| 2073 | // parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on |
|---|
| 2074 | // identifiers. The ANSI-style parameter-list can redefine a typedef name. |
|---|
| 2075 | |
|---|
| 2076 | identifier_list: // K&R-style parameter list => no types |
|---|
| 2077 | no_attr_identifier |
|---|
| 2078 | { $$ = DeclarationNode::newName( $1 ); } |
|---|
| 2079 | | identifier_list ',' no_attr_identifier |
|---|
| 2080 | { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); } |
|---|
| 2081 | ; |
|---|
| 2082 | |
|---|
| 2083 | identifier_or_type_name: |
|---|
| 2084 | identifier |
|---|
| 2085 | | TYPEDEFname |
|---|
| 2086 | | TYPEGENname |
|---|
| 2087 | ; |
|---|
| 2088 | |
|---|
| 2089 | no_attr_identifier_or_type_name: |
|---|
| 2090 | no_attr_identifier |
|---|
| 2091 | | TYPEDEFname |
|---|
| 2092 | | TYPEGENname |
|---|
| 2093 | ; |
|---|
| 2094 | |
|---|
| 2095 | type_no_function: // sizeof, alignof, cast (constructor) |
|---|
| 2096 | cfa_abstract_declarator_tuple // CFA |
|---|
| 2097 | | type_specifier |
|---|
| 2098 | | type_specifier abstract_declarator |
|---|
| 2099 | { $$ = $2->addType( $1 ); } |
|---|
| 2100 | ; |
|---|
| 2101 | |
|---|
| 2102 | type: // typeof, assertion |
|---|
| 2103 | type_no_function |
|---|
| 2104 | | cfa_abstract_function // CFA |
|---|
| 2105 | ; |
|---|
| 2106 | |
|---|
| 2107 | initializer_opt: |
|---|
| 2108 | // empty |
|---|
| 2109 | { $$ = nullptr; } |
|---|
| 2110 | | '=' initializer |
|---|
| 2111 | { $$ = $2; } |
|---|
| 2112 | | '=' VOID |
|---|
| 2113 | { $$ = nullptr; } |
|---|
| 2114 | | ATassign initializer |
|---|
| 2115 | { $$ = $2->set_maybeConstructed( false ); } |
|---|
| 2116 | ; |
|---|
| 2117 | |
|---|
| 2118 | initializer: |
|---|
| 2119 | assignment_expression { $$ = new InitializerNode( $1 ); } |
|---|
| 2120 | | '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); } |
|---|
| 2121 | ; |
|---|
| 2122 | |
|---|
| 2123 | initializer_list: |
|---|
| 2124 | // empty |
|---|
| 2125 | { $$ = nullptr; } |
|---|
| 2126 | | initializer |
|---|
| 2127 | | designation initializer { $$ = $2->set_designators( $1 ); } |
|---|
| 2128 | | initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); } |
|---|
| 2129 | | initializer_list ',' designation initializer |
|---|
| 2130 | { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); } |
|---|
| 2131 | ; |
|---|
| 2132 | |
|---|
| 2133 | // There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of |
|---|
| 2134 | // '=' to separator the designator from the initializer value, as in: |
|---|
| 2135 | // |
|---|
| 2136 | // int x[10] = { [1] = 3 }; |
|---|
| 2137 | // |
|---|
| 2138 | // The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA |
|---|
| 2139 | // changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for |
|---|
| 2140 | // field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to |
|---|
| 2141 | // shift/reduce conflicts |
|---|
| 2142 | |
|---|
| 2143 | designation: |
|---|
| 2144 | designator_list ':' // C99, CFA uses ":" instead of "=" |
|---|
| 2145 | | no_attr_identifier ':' // GCC, field name |
|---|
| 2146 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
|---|
| 2147 | ; |
|---|
| 2148 | |
|---|
| 2149 | designator_list: // C99 |
|---|
| 2150 | designator |
|---|
| 2151 | | designator_list designator |
|---|
| 2152 | { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); } |
|---|
| 2153 | //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); } |
|---|
| 2154 | ; |
|---|
| 2155 | |
|---|
| 2156 | designator: |
|---|
| 2157 | '.' no_attr_identifier // C99, field name |
|---|
| 2158 | { $$ = new ExpressionNode( build_varref( $2 ) ); } |
|---|
| 2159 | | '[' push assignment_expression pop ']' // C99, single array element |
|---|
| 2160 | // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple. |
|---|
| 2161 | { $$ = $3; } |
|---|
| 2162 | | '[' push subrange pop ']' // CFA, multiple array elements |
|---|
| 2163 | { $$ = $3; } |
|---|
| 2164 | | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements |
|---|
| 2165 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $3 ), maybeMoveBuild< Expression >( $5 ) ) ); } |
|---|
| 2166 | | '.' '[' push field_list pop ']' // CFA, tuple field selector |
|---|
| 2167 | { $$ = $4; } |
|---|
| 2168 | ; |
|---|
| 2169 | |
|---|
| 2170 | // The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters, |
|---|
| 2171 | // rather than an object-oriented type system. This required four groups of extensions: |
|---|
| 2172 | // |
|---|
| 2173 | // Overloading: function, data, and operator identifiers may be overloaded. |
|---|
| 2174 | // |
|---|
| 2175 | // Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object |
|---|
| 2176 | // and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide |
|---|
| 2177 | // definitions of new types. Type declarations with storage class "extern" provide opaque types. |
|---|
| 2178 | // |
|---|
| 2179 | // Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call |
|---|
| 2180 | // site. A polymorphic function is not a template; it is a function, with an address and a type. |
|---|
| 2181 | // |
|---|
| 2182 | // Specifications and Assertions: Specifications are collections of declarations parameterized by one or more |
|---|
| 2183 | // types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass |
|---|
| 2184 | // hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or |
|---|
| 2185 | // types provide the operations declared by a specification. Assertions are normally used to declare requirements |
|---|
| 2186 | // on type arguments of polymorphic functions. |
|---|
| 2187 | |
|---|
| 2188 | type_parameter_list: // CFA |
|---|
| 2189 | type_parameter |
|---|
| 2190 | { $$ = $1; } |
|---|
| 2191 | | type_parameter_list ',' type_parameter |
|---|
| 2192 | { $$ = $1->appendList( $3 ); } |
|---|
| 2193 | ; |
|---|
| 2194 | |
|---|
| 2195 | type_initializer_opt: // CFA |
|---|
| 2196 | // empty |
|---|
| 2197 | { $$ = nullptr; } |
|---|
| 2198 | | '=' type |
|---|
| 2199 | { $$ = $2; } |
|---|
| 2200 | ; |
|---|
| 2201 | |
|---|
| 2202 | type_parameter: // CFA |
|---|
| 2203 | type_class no_attr_identifier_or_type_name |
|---|
| 2204 | { typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); } |
|---|
| 2205 | type_initializer_opt assertion_list_opt |
|---|
| 2206 | { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); } |
|---|
| 2207 | | type_specifier identifier_parameter_declarator |
|---|
| 2208 | ; |
|---|
| 2209 | |
|---|
| 2210 | type_class: // CFA |
|---|
| 2211 | OTYPE |
|---|
| 2212 | { $$ = DeclarationNode::Otype; } |
|---|
| 2213 | | DTYPE |
|---|
| 2214 | { $$ = DeclarationNode::Dtype; } |
|---|
| 2215 | | FTYPE |
|---|
| 2216 | { $$ = DeclarationNode::Ftype; } |
|---|
| 2217 | | TTYPE |
|---|
| 2218 | { $$ = DeclarationNode::Ttype; } |
|---|
| 2219 | ; |
|---|
| 2220 | |
|---|
| 2221 | assertion_list_opt: // CFA |
|---|
| 2222 | // empty |
|---|
| 2223 | { $$ = nullptr; } |
|---|
| 2224 | | assertion_list_opt assertion |
|---|
| 2225 | { $$ = $1 ? $1->appendList( $2 ) : $2; } |
|---|
| 2226 | ; |
|---|
| 2227 | |
|---|
| 2228 | assertion: // CFA |
|---|
| 2229 | '|' no_attr_identifier_or_type_name '(' type_list ')' |
|---|
| 2230 | { |
|---|
| 2231 | typedefTable.openTrait( *$2 ); |
|---|
| 2232 | $$ = DeclarationNode::newTraitUse( $2, $4 ); |
|---|
| 2233 | } |
|---|
| 2234 | | '|' '{' push trait_declaration_list '}' |
|---|
| 2235 | { $$ = $4; } |
|---|
| 2236 | | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')' |
|---|
| 2237 | { $$ = nullptr; } |
|---|
| 2238 | ; |
|---|
| 2239 | |
|---|
| 2240 | type_list: // CFA |
|---|
| 2241 | type |
|---|
| 2242 | { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); } |
|---|
| 2243 | | assignment_expression |
|---|
| 2244 | | type_list ',' type |
|---|
| 2245 | { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) ) ); } |
|---|
| 2246 | | type_list ',' assignment_expression |
|---|
| 2247 | { $$ = (ExpressionNode *)( $1->set_last( $3 )); } |
|---|
| 2248 | ; |
|---|
| 2249 | |
|---|
| 2250 | type_declaring_list: // CFA |
|---|
| 2251 | OTYPE type_declarator |
|---|
| 2252 | { $$ = $2; } |
|---|
| 2253 | | storage_class_list OTYPE type_declarator |
|---|
| 2254 | { $$ = $3->addQualifiers( $1 ); } |
|---|
| 2255 | | type_declaring_list ',' type_declarator |
|---|
| 2256 | { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); } |
|---|
| 2257 | ; |
|---|
| 2258 | |
|---|
| 2259 | type_declarator: // CFA |
|---|
| 2260 | type_declarator_name assertion_list_opt |
|---|
| 2261 | { $$ = $1->addAssertions( $2 ); } |
|---|
| 2262 | | type_declarator_name assertion_list_opt '=' type |
|---|
| 2263 | { $$ = $1->addAssertions( $2 )->addType( $4 ); } |
|---|
| 2264 | ; |
|---|
| 2265 | |
|---|
| 2266 | type_declarator_name: // CFA |
|---|
| 2267 | no_attr_identifier_or_type_name |
|---|
| 2268 | { |
|---|
| 2269 | typedefTable.addToEnclosingScope( *$1, TypedefTable::TD ); |
|---|
| 2270 | $$ = DeclarationNode::newTypeDecl( $1, 0 ); |
|---|
| 2271 | } |
|---|
| 2272 | | no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' |
|---|
| 2273 | { |
|---|
| 2274 | typedefTable.addToEnclosingScope( *$1, TypedefTable::TG ); |
|---|
| 2275 | $$ = DeclarationNode::newTypeDecl( $1, $4 ); |
|---|
| 2276 | } |
|---|
| 2277 | ; |
|---|
| 2278 | |
|---|
| 2279 | trait_specifier: // CFA |
|---|
| 2280 | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}' |
|---|
| 2281 | { |
|---|
| 2282 | typedefTable.addToEnclosingScope( *$2, TypedefTable::ID ); |
|---|
| 2283 | $$ = DeclarationNode::newTrait( $2, $5, 0 ); |
|---|
| 2284 | } |
|---|
| 2285 | | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' |
|---|
| 2286 | { |
|---|
| 2287 | typedefTable.enterTrait( *$2 ); |
|---|
| 2288 | typedefTable.enterScope(); |
|---|
| 2289 | } |
|---|
| 2290 | trait_declaration_list '}' |
|---|
| 2291 | { |
|---|
| 2292 | typedefTable.leaveTrait(); |
|---|
| 2293 | typedefTable.addToEnclosingScope( *$2, TypedefTable::ID ); |
|---|
| 2294 | $$ = DeclarationNode::newTrait( $2, $5, $10 ); |
|---|
| 2295 | } |
|---|
| 2296 | ; |
|---|
| 2297 | |
|---|
| 2298 | trait_declaration_list: // CFA |
|---|
| 2299 | trait_declaration |
|---|
| 2300 | | trait_declaration_list push trait_declaration |
|---|
| 2301 | { $$ = $1->appendList( $3 ); } |
|---|
| 2302 | ; |
|---|
| 2303 | |
|---|
| 2304 | trait_declaration: // CFA |
|---|
| 2305 | cfa_trait_declaring_list pop ';' |
|---|
| 2306 | | trait_declaring_list pop ';' |
|---|
| 2307 | ; |
|---|
| 2308 | |
|---|
| 2309 | cfa_trait_declaring_list: // CFA |
|---|
| 2310 | cfa_variable_specifier |
|---|
| 2311 | { |
|---|
| 2312 | typedefTable.addToEnclosingScope2( TypedefTable::ID ); |
|---|
| 2313 | $$ = $1; |
|---|
| 2314 | } |
|---|
| 2315 | | cfa_function_specifier |
|---|
| 2316 | { |
|---|
| 2317 | typedefTable.addToEnclosingScope2( TypedefTable::ID ); |
|---|
| 2318 | $$ = $1; |
|---|
| 2319 | } |
|---|
| 2320 | | cfa_trait_declaring_list pop ',' push identifier_or_type_name |
|---|
| 2321 | { |
|---|
| 2322 | typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID ); |
|---|
| 2323 | $$ = $1->appendList( $1->cloneType( $5 ) ); |
|---|
| 2324 | } |
|---|
| 2325 | ; |
|---|
| 2326 | |
|---|
| 2327 | trait_declaring_list: // CFA |
|---|
| 2328 | type_specifier declarator |
|---|
| 2329 | { |
|---|
| 2330 | typedefTable.addToEnclosingScope2( TypedefTable::ID ); |
|---|
| 2331 | $$ = $2->addType( $1 ); |
|---|
| 2332 | } |
|---|
| 2333 | | trait_declaring_list pop ',' push declarator |
|---|
| 2334 | { |
|---|
| 2335 | typedefTable.addToEnclosingScope2( TypedefTable::ID ); |
|---|
| 2336 | $$ = $1->appendList( $1->cloneBaseType( $5 ) ); |
|---|
| 2337 | } |
|---|
| 2338 | ; |
|---|
| 2339 | |
|---|
| 2340 | //***************************** EXTERNAL DEFINITIONS ***************************** |
|---|
| 2341 | |
|---|
| 2342 | translation_unit: |
|---|
| 2343 | // empty |
|---|
| 2344 | {} // empty input file |
|---|
| 2345 | | external_definition_list |
|---|
| 2346 | { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; } |
|---|
| 2347 | ; |
|---|
| 2348 | |
|---|
| 2349 | external_definition_list: |
|---|
| 2350 | external_definition |
|---|
| 2351 | | external_definition_list push external_definition |
|---|
| 2352 | { $$ = $1 ? $1->appendList( $3 ) : $3; } |
|---|
| 2353 | ; |
|---|
| 2354 | |
|---|
| 2355 | external_definition_list_opt: |
|---|
| 2356 | // empty |
|---|
| 2357 | { $$ = nullptr; } |
|---|
| 2358 | | external_definition_list |
|---|
| 2359 | ; |
|---|
| 2360 | |
|---|
| 2361 | external_definition: |
|---|
| 2362 | declaration |
|---|
| 2363 | | external_function_definition |
|---|
| 2364 | | ASM '(' string_literal ')' ';' // GCC, global assembler statement |
|---|
| 2365 | { |
|---|
| 2366 | $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asmstmt( false, $3, 0 ) ) ); |
|---|
| 2367 | } |
|---|
| 2368 | | EXTERN STRINGliteral // C++-style linkage specifier |
|---|
| 2369 | { |
|---|
| 2370 | linkageStack.push( linkage ); // handle nested extern "C"/"Cforall" |
|---|
| 2371 | linkage = LinkageSpec::linkageUpdate( linkage, $2 ); |
|---|
| 2372 | } |
|---|
| 2373 | '{' external_definition_list_opt '}' |
|---|
| 2374 | { |
|---|
| 2375 | linkage = linkageStack.top(); |
|---|
| 2376 | linkageStack.pop(); |
|---|
| 2377 | $$ = $5; |
|---|
| 2378 | } |
|---|
| 2379 | | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown |
|---|
| 2380 | { |
|---|
| 2381 | distExt( $2 ); // mark all fields in list |
|---|
| 2382 | $$ = $2; |
|---|
| 2383 | } |
|---|
| 2384 | | forall '{' external_definition_list '}' // CFA, namespace |
|---|
| 2385 | ; |
|---|
| 2386 | |
|---|
| 2387 | external_function_definition: |
|---|
| 2388 | function_definition |
|---|
| 2389 | // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of |
|---|
| 2390 | // legacy code with global functions missing the type-specifier for the return type, and assuming "int". |
|---|
| 2391 | // Parsing is possible because function_definition does not appear in the context of an expression (nested |
|---|
| 2392 | // functions preclude this concession, i.e., all nested function must have a return type). A function prototype |
|---|
| 2393 | // declaration must still have a type_specifier. OBSOLESCENT (see 1) |
|---|
| 2394 | | function_declarator compound_statement |
|---|
| 2395 | { |
|---|
| 2396 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2397 | typedefTable.leaveScope(); |
|---|
| 2398 | $$ = $1->addFunctionBody( $2 ); |
|---|
| 2399 | } |
|---|
| 2400 | | KR_function_declarator KR_declaration_list_opt compound_statement |
|---|
| 2401 | { |
|---|
| 2402 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2403 | typedefTable.leaveScope(); |
|---|
| 2404 | $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); |
|---|
| 2405 | } |
|---|
| 2406 | ; |
|---|
| 2407 | |
|---|
| 2408 | with_clause_opt: |
|---|
| 2409 | // empty |
|---|
| 2410 | { $$ = nullptr; } |
|---|
| 2411 | | WITH '(' tuple_expression_list ')' |
|---|
| 2412 | { throw SemanticError("With clause is currently unimplemented."); $$ = nullptr; } // FIX ME |
|---|
| 2413 | ; |
|---|
| 2414 | |
|---|
| 2415 | function_definition: |
|---|
| 2416 | cfa_function_declaration with_clause_opt compound_statement // CFA |
|---|
| 2417 | { |
|---|
| 2418 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2419 | typedefTable.leaveScope(); |
|---|
| 2420 | // Add the function body to the last identifier in the function definition list, i.e., foo3: |
|---|
| 2421 | // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; } |
|---|
| 2422 | $1->get_last()->addFunctionBody( $3 ); |
|---|
| 2423 | $$ = $1; |
|---|
| 2424 | } |
|---|
| 2425 | | declaration_specifier function_declarator with_clause_opt compound_statement |
|---|
| 2426 | { |
|---|
| 2427 | rebindForall( $1, $2 ); |
|---|
| 2428 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2429 | typedefTable.leaveScope(); |
|---|
| 2430 | $$ = $2->addFunctionBody( $4 )->addType( $1 ); |
|---|
| 2431 | } |
|---|
| 2432 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2433 | | type_qualifier_list function_declarator with_clause_opt compound_statement |
|---|
| 2434 | { |
|---|
| 2435 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2436 | typedefTable.leaveScope(); |
|---|
| 2437 | $$ = $2->addFunctionBody( $4 )->addQualifiers( $1 ); |
|---|
| 2438 | } |
|---|
| 2439 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2440 | | declaration_qualifier_list function_declarator with_clause_opt compound_statement |
|---|
| 2441 | { |
|---|
| 2442 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2443 | typedefTable.leaveScope(); |
|---|
| 2444 | $$ = $2->addFunctionBody( $4 )->addQualifiers( $1 ); |
|---|
| 2445 | } |
|---|
| 2446 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2447 | | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement |
|---|
| 2448 | { |
|---|
| 2449 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2450 | typedefTable.leaveScope(); |
|---|
| 2451 | $$ = $3->addFunctionBody( $5 )->addQualifiers( $2 )->addQualifiers( $1 ); |
|---|
| 2452 | } |
|---|
| 2453 | |
|---|
| 2454 | // Old-style K&R function definition, OBSOLESCENT (see 4) |
|---|
| 2455 | | declaration_specifier KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
|---|
| 2456 | { |
|---|
| 2457 | rebindForall( $1, $2 ); |
|---|
| 2458 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2459 | typedefTable.leaveScope(); |
|---|
| 2460 | $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5 )->addType( $1 ); |
|---|
| 2461 | } |
|---|
| 2462 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2463 | | type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
|---|
| 2464 | { |
|---|
| 2465 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2466 | typedefTable.leaveScope(); |
|---|
| 2467 | $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5 )->addQualifiers( $1 ); |
|---|
| 2468 | } |
|---|
| 2469 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2470 | | declaration_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
|---|
| 2471 | { |
|---|
| 2472 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2473 | typedefTable.leaveScope(); |
|---|
| 2474 | $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5 )->addQualifiers( $1 ); |
|---|
| 2475 | } |
|---|
| 2476 | // handles default int return type, OBSOLESCENT (see 1) |
|---|
| 2477 | | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
|---|
| 2478 | { |
|---|
| 2479 | typedefTable.addToEnclosingScope( TypedefTable::ID ); |
|---|
| 2480 | typedefTable.leaveScope(); |
|---|
| 2481 | $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6 )->addQualifiers( $2 )->addQualifiers( $1 ); |
|---|
| 2482 | } |
|---|
| 2483 | ; |
|---|
| 2484 | |
|---|
| 2485 | declarator: |
|---|
| 2486 | variable_declarator |
|---|
| 2487 | | variable_type_redeclarator |
|---|
| 2488 | | function_declarator |
|---|
| 2489 | ; |
|---|
| 2490 | |
|---|
| 2491 | subrange: |
|---|
| 2492 | constant_expression '~' constant_expression // CFA, integer subrange |
|---|
| 2493 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
|---|
| 2494 | ; |
|---|
| 2495 | |
|---|
| 2496 | asm_name_opt: // GCC |
|---|
| 2497 | // empty |
|---|
| 2498 | { $$ = nullptr; } |
|---|
| 2499 | | ASM '(' string_literal ')' attribute_list_opt |
|---|
| 2500 | { |
|---|
| 2501 | DeclarationNode * name = new DeclarationNode(); |
|---|
| 2502 | name->asmName = $3; |
|---|
| 2503 | $$ = name->addQualifiers( $5 ); |
|---|
| 2504 | } |
|---|
| 2505 | ; |
|---|
| 2506 | |
|---|
| 2507 | attribute_list_opt: // GCC |
|---|
| 2508 | // empty |
|---|
| 2509 | { $$ = nullptr; } |
|---|
| 2510 | | attribute_list |
|---|
| 2511 | ; |
|---|
| 2512 | |
|---|
| 2513 | attribute_list: // GCC |
|---|
| 2514 | attribute |
|---|
| 2515 | | attribute_list attribute |
|---|
| 2516 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 2517 | ; |
|---|
| 2518 | |
|---|
| 2519 | attribute: // GCC |
|---|
| 2520 | ATTRIBUTE '(' '(' attribute_name_list ')' ')' |
|---|
| 2521 | { $$ = $4; } |
|---|
| 2522 | ; |
|---|
| 2523 | |
|---|
| 2524 | attribute_name_list: // GCC |
|---|
| 2525 | attribute_name |
|---|
| 2526 | | attribute_name_list ',' attribute_name |
|---|
| 2527 | { $$ = $3->addQualifiers( $1 ); } |
|---|
| 2528 | ; |
|---|
| 2529 | |
|---|
| 2530 | attribute_name: // GCC |
|---|
| 2531 | // empty |
|---|
| 2532 | { $$ = nullptr; } |
|---|
| 2533 | | attr_name |
|---|
| 2534 | { $$ = DeclarationNode::newAttribute( $1 ); } |
|---|
| 2535 | | attr_name '(' argument_expression_list ')' |
|---|
| 2536 | { $$ = DeclarationNode::newAttribute( $1, $3 ); } |
|---|
| 2537 | ; |
|---|
| 2538 | |
|---|
| 2539 | attr_name: // GCC |
|---|
| 2540 | IDENTIFIER |
|---|
| 2541 | | quasi_keyword |
|---|
| 2542 | | TYPEDEFname |
|---|
| 2543 | | TYPEGENname |
|---|
| 2544 | | FALLTHROUGH |
|---|
| 2545 | { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; } |
|---|
| 2546 | | CONST |
|---|
| 2547 | { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; } |
|---|
| 2548 | ; |
|---|
| 2549 | |
|---|
| 2550 | // ============================================================================ |
|---|
| 2551 | // The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary |
|---|
| 2552 | // because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as |
|---|
| 2553 | // in: |
|---|
| 2554 | // |
|---|
| 2555 | // int (*f())[10] { ... }; |
|---|
| 2556 | // ... (*f())[3] += 1; // definition mimics usage |
|---|
| 2557 | // |
|---|
| 2558 | // Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of |
|---|
| 2559 | // the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context. |
|---|
| 2560 | // ============================================================================ |
|---|
| 2561 | |
|---|
| 2562 | // ---------------------------------------------------------------------------- |
|---|
| 2563 | // The set of valid declarators before a compound statement for defining a function is less than the set of declarators |
|---|
| 2564 | // to define a variable or function prototype, e.g.: |
|---|
| 2565 | // |
|---|
| 2566 | // valid declaration invalid definition |
|---|
| 2567 | // ----------------- ------------------ |
|---|
| 2568 | // int f; int f {} |
|---|
| 2569 | // int *f; int *f {} |
|---|
| 2570 | // int f[10]; int f[10] {} |
|---|
| 2571 | // int (*f)(int); int (*f)(int) {} |
|---|
| 2572 | // |
|---|
| 2573 | // To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence |
|---|
| 2574 | // variable_declarator and function_declarator. |
|---|
| 2575 | // ---------------------------------------------------------------------------- |
|---|
| 2576 | |
|---|
| 2577 | // This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes |
|---|
| 2578 | // declaring an array of functions versus a pointer to an array of functions. |
|---|
| 2579 | |
|---|
| 2580 | variable_declarator: |
|---|
| 2581 | paren_identifier attribute_list_opt |
|---|
| 2582 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2583 | | variable_ptr |
|---|
| 2584 | | variable_array attribute_list_opt |
|---|
| 2585 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2586 | | variable_function attribute_list_opt |
|---|
| 2587 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2588 | ; |
|---|
| 2589 | |
|---|
| 2590 | paren_identifier: |
|---|
| 2591 | identifier |
|---|
| 2592 | { |
|---|
| 2593 | typedefTable.setNextIdentifier( *$1 ); |
|---|
| 2594 | $$ = DeclarationNode::newName( $1 ); |
|---|
| 2595 | } |
|---|
| 2596 | | '(' paren_identifier ')' // redundant parenthesis |
|---|
| 2597 | { $$ = $2; } |
|---|
| 2598 | ; |
|---|
| 2599 | |
|---|
| 2600 | variable_ptr: |
|---|
| 2601 | ptrref_operator variable_declarator |
|---|
| 2602 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2603 | | ptrref_operator type_qualifier_list variable_declarator |
|---|
| 2604 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2605 | | '(' variable_ptr ')' attribute_list_opt |
|---|
| 2606 | { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis |
|---|
| 2607 | ; |
|---|
| 2608 | |
|---|
| 2609 | variable_array: |
|---|
| 2610 | paren_identifier array_dimension |
|---|
| 2611 | { $$ = $1->addArray( $2 ); } |
|---|
| 2612 | | '(' variable_ptr ')' array_dimension |
|---|
| 2613 | { $$ = $2->addArray( $4 ); } |
|---|
| 2614 | | '(' variable_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2615 | { $$ = $2->addArray( $4 ); } |
|---|
| 2616 | | '(' variable_array ')' // redundant parenthesis |
|---|
| 2617 | { $$ = $2; } |
|---|
| 2618 | ; |
|---|
| 2619 | |
|---|
| 2620 | variable_function: |
|---|
| 2621 | '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2622 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2623 | | '(' variable_function ')' // redundant parenthesis |
|---|
| 2624 | { $$ = $2; } |
|---|
| 2625 | ; |
|---|
| 2626 | |
|---|
| 2627 | // This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is |
|---|
| 2628 | // no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist |
|---|
| 2629 | // is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions. |
|---|
| 2630 | |
|---|
| 2631 | function_declarator: |
|---|
| 2632 | function_no_ptr attribute_list_opt |
|---|
| 2633 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2634 | | function_ptr |
|---|
| 2635 | | function_array attribute_list_opt |
|---|
| 2636 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2637 | ; |
|---|
| 2638 | |
|---|
| 2639 | function_no_ptr: |
|---|
| 2640 | paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2641 | { $$ = $1->addParamList( $4 ); } |
|---|
| 2642 | | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')' |
|---|
| 2643 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2644 | | '(' function_no_ptr ')' // redundant parenthesis |
|---|
| 2645 | { $$ = $2; } |
|---|
| 2646 | ; |
|---|
| 2647 | |
|---|
| 2648 | function_ptr: |
|---|
| 2649 | ptrref_operator function_declarator |
|---|
| 2650 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2651 | | ptrref_operator type_qualifier_list function_declarator |
|---|
| 2652 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2653 | | '(' function_ptr ')' |
|---|
| 2654 | { $$ = $2; } |
|---|
| 2655 | ; |
|---|
| 2656 | |
|---|
| 2657 | function_array: |
|---|
| 2658 | '(' function_ptr ')' array_dimension |
|---|
| 2659 | { $$ = $2->addArray( $4 ); } |
|---|
| 2660 | | '(' function_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2661 | { $$ = $2->addArray( $4 ); } |
|---|
| 2662 | | '(' function_array ')' // redundant parenthesis |
|---|
| 2663 | { $$ = $2; } |
|---|
| 2664 | ; |
|---|
| 2665 | |
|---|
| 2666 | // This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4) |
|---|
| 2667 | // |
|---|
| 2668 | // f( a, b, c ) int a, *b, c[]; {} |
|---|
| 2669 | // |
|---|
| 2670 | // that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes |
|---|
| 2671 | // returning arrays and functions versus pointers to arrays and functions. |
|---|
| 2672 | |
|---|
| 2673 | KR_function_declarator: |
|---|
| 2674 | KR_function_no_ptr |
|---|
| 2675 | | KR_function_ptr |
|---|
| 2676 | | KR_function_array |
|---|
| 2677 | ; |
|---|
| 2678 | |
|---|
| 2679 | KR_function_no_ptr: |
|---|
| 2680 | paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter |
|---|
| 2681 | { $$ = $1->addIdList( $3 ); } |
|---|
| 2682 | | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')' |
|---|
| 2683 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2684 | | '(' KR_function_no_ptr ')' // redundant parenthesis |
|---|
| 2685 | { $$ = $2; } |
|---|
| 2686 | ; |
|---|
| 2687 | |
|---|
| 2688 | KR_function_ptr: |
|---|
| 2689 | ptrref_operator KR_function_declarator |
|---|
| 2690 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2691 | | ptrref_operator type_qualifier_list KR_function_declarator |
|---|
| 2692 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2693 | | '(' KR_function_ptr ')' |
|---|
| 2694 | { $$ = $2; } |
|---|
| 2695 | ; |
|---|
| 2696 | |
|---|
| 2697 | KR_function_array: |
|---|
| 2698 | '(' KR_function_ptr ')' array_dimension |
|---|
| 2699 | { $$ = $2->addArray( $4 ); } |
|---|
| 2700 | | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2701 | { $$ = $2->addArray( $4 ); } |
|---|
| 2702 | | '(' KR_function_array ')' // redundant parenthesis |
|---|
| 2703 | { $$ = $2; } |
|---|
| 2704 | ; |
|---|
| 2705 | |
|---|
| 2706 | // This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.: |
|---|
| 2707 | // |
|---|
| 2708 | // typedef int foo; |
|---|
| 2709 | // { |
|---|
| 2710 | // int foo; // redefine typedef name in new scope |
|---|
| 2711 | // } |
|---|
| 2712 | // |
|---|
| 2713 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
|---|
| 2714 | // and functions versus pointers to arrays and functions. |
|---|
| 2715 | |
|---|
| 2716 | variable_type_redeclarator: |
|---|
| 2717 | paren_type attribute_list_opt |
|---|
| 2718 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2719 | | type_ptr |
|---|
| 2720 | | type_array attribute_list_opt |
|---|
| 2721 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2722 | | type_function attribute_list_opt |
|---|
| 2723 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2724 | ; |
|---|
| 2725 | |
|---|
| 2726 | paren_type: |
|---|
| 2727 | typedef |
|---|
| 2728 | | '(' paren_type ')' |
|---|
| 2729 | { $$ = $2; } |
|---|
| 2730 | ; |
|---|
| 2731 | |
|---|
| 2732 | type_ptr: |
|---|
| 2733 | ptrref_operator variable_type_redeclarator |
|---|
| 2734 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2735 | | ptrref_operator type_qualifier_list variable_type_redeclarator |
|---|
| 2736 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2737 | | '(' type_ptr ')' attribute_list_opt |
|---|
| 2738 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 2739 | ; |
|---|
| 2740 | |
|---|
| 2741 | type_array: |
|---|
| 2742 | paren_type array_dimension |
|---|
| 2743 | { $$ = $1->addArray( $2 ); } |
|---|
| 2744 | | '(' type_ptr ')' array_dimension |
|---|
| 2745 | { $$ = $2->addArray( $4 ); } |
|---|
| 2746 | | '(' type_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2747 | { $$ = $2->addArray( $4 ); } |
|---|
| 2748 | | '(' type_array ')' // redundant parenthesis |
|---|
| 2749 | { $$ = $2; } |
|---|
| 2750 | ; |
|---|
| 2751 | |
|---|
| 2752 | type_function: |
|---|
| 2753 | paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2754 | { $$ = $1->addParamList( $4 ); } |
|---|
| 2755 | | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2756 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2757 | | '(' type_function ')' // redundant parenthesis |
|---|
| 2758 | { $$ = $2; } |
|---|
| 2759 | ; |
|---|
| 2760 | |
|---|
| 2761 | // This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a |
|---|
| 2762 | // typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes |
|---|
| 2763 | // declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus |
|---|
| 2764 | // pointers to arrays and functions. |
|---|
| 2765 | |
|---|
| 2766 | identifier_parameter_declarator: |
|---|
| 2767 | paren_identifier attribute_list_opt |
|---|
| 2768 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2769 | | '&' MUTEX paren_identifier attribute_list_opt |
|---|
| 2770 | { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); } |
|---|
| 2771 | | identifier_parameter_ptr |
|---|
| 2772 | | identifier_parameter_array attribute_list_opt |
|---|
| 2773 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2774 | | identifier_parameter_function attribute_list_opt |
|---|
| 2775 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2776 | ; |
|---|
| 2777 | |
|---|
| 2778 | identifier_parameter_ptr: |
|---|
| 2779 | ptrref_operator identifier_parameter_declarator |
|---|
| 2780 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2781 | | ptrref_operator type_qualifier_list identifier_parameter_declarator |
|---|
| 2782 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2783 | | '(' identifier_parameter_ptr ')' attribute_list_opt |
|---|
| 2784 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 2785 | ; |
|---|
| 2786 | |
|---|
| 2787 | identifier_parameter_array: |
|---|
| 2788 | paren_identifier array_parameter_dimension |
|---|
| 2789 | { $$ = $1->addArray( $2 ); } |
|---|
| 2790 | | '(' identifier_parameter_ptr ')' array_dimension |
|---|
| 2791 | { $$ = $2->addArray( $4 ); } |
|---|
| 2792 | | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2793 | { $$ = $2->addArray( $4 ); } |
|---|
| 2794 | | '(' identifier_parameter_array ')' // redundant parenthesis |
|---|
| 2795 | { $$ = $2; } |
|---|
| 2796 | ; |
|---|
| 2797 | |
|---|
| 2798 | identifier_parameter_function: |
|---|
| 2799 | paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2800 | { $$ = $1->addParamList( $4 ); } |
|---|
| 2801 | | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2802 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2803 | | '(' identifier_parameter_function ')' // redundant parenthesis |
|---|
| 2804 | { $$ = $2; } |
|---|
| 2805 | ; |
|---|
| 2806 | |
|---|
| 2807 | // This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name, |
|---|
| 2808 | // e.g.: |
|---|
| 2809 | // |
|---|
| 2810 | // typedef int foo; |
|---|
| 2811 | // forall( otype T ) struct foo; |
|---|
| 2812 | // int f( int foo ); // redefine typedef name in new scope |
|---|
| 2813 | // |
|---|
| 2814 | // and allows the C99 array options, which can only appear in a parameter list. |
|---|
| 2815 | |
|---|
| 2816 | type_parameter_redeclarator: |
|---|
| 2817 | typedef attribute_list_opt |
|---|
| 2818 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2819 | | '&' MUTEX typedef attribute_list_opt |
|---|
| 2820 | { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); } |
|---|
| 2821 | | type_parameter_ptr |
|---|
| 2822 | | type_parameter_array attribute_list_opt |
|---|
| 2823 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2824 | | type_parameter_function attribute_list_opt |
|---|
| 2825 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2826 | ; |
|---|
| 2827 | |
|---|
| 2828 | typedef: |
|---|
| 2829 | TYPEDEFname |
|---|
| 2830 | { |
|---|
| 2831 | typedefTable.setNextIdentifier( *$1 ); |
|---|
| 2832 | $$ = DeclarationNode::newName( $1 ); |
|---|
| 2833 | } |
|---|
| 2834 | | TYPEGENname |
|---|
| 2835 | { |
|---|
| 2836 | typedefTable.setNextIdentifier( *$1 ); |
|---|
| 2837 | $$ = DeclarationNode::newName( $1 ); |
|---|
| 2838 | } |
|---|
| 2839 | ; |
|---|
| 2840 | |
|---|
| 2841 | type_parameter_ptr: |
|---|
| 2842 | ptrref_operator type_parameter_redeclarator |
|---|
| 2843 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2844 | | ptrref_operator type_qualifier_list type_parameter_redeclarator |
|---|
| 2845 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2846 | | '(' type_parameter_ptr ')' attribute_list_opt |
|---|
| 2847 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 2848 | ; |
|---|
| 2849 | |
|---|
| 2850 | type_parameter_array: |
|---|
| 2851 | typedef array_parameter_dimension |
|---|
| 2852 | { $$ = $1->addArray( $2 ); } |
|---|
| 2853 | | '(' type_parameter_ptr ')' array_parameter_dimension |
|---|
| 2854 | { $$ = $2->addArray( $4 ); } |
|---|
| 2855 | ; |
|---|
| 2856 | |
|---|
| 2857 | type_parameter_function: |
|---|
| 2858 | typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2859 | { $$ = $1->addParamList( $4 ); } |
|---|
| 2860 | | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2861 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2862 | ; |
|---|
| 2863 | |
|---|
| 2864 | // This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to |
|---|
| 2865 | // which the type applies, e.g.: |
|---|
| 2866 | // |
|---|
| 2867 | // sizeof( int ); |
|---|
| 2868 | // sizeof( int * ); |
|---|
| 2869 | // sizeof( int [10] ); |
|---|
| 2870 | // sizeof( int (*)() ); |
|---|
| 2871 | // sizeof( int () ); |
|---|
| 2872 | // |
|---|
| 2873 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
|---|
| 2874 | // and functions versus pointers to arrays and functions. |
|---|
| 2875 | |
|---|
| 2876 | abstract_declarator: |
|---|
| 2877 | abstract_ptr |
|---|
| 2878 | | abstract_array attribute_list_opt |
|---|
| 2879 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2880 | | abstract_function attribute_list_opt |
|---|
| 2881 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2882 | ; |
|---|
| 2883 | |
|---|
| 2884 | abstract_ptr: |
|---|
| 2885 | ptrref_operator |
|---|
| 2886 | { $$ = DeclarationNode::newPointer( 0, $1 ); } |
|---|
| 2887 | | ptrref_operator type_qualifier_list |
|---|
| 2888 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
|---|
| 2889 | | ptrref_operator abstract_declarator |
|---|
| 2890 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 2891 | | ptrref_operator type_qualifier_list abstract_declarator |
|---|
| 2892 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2893 | | '(' abstract_ptr ')' attribute_list_opt |
|---|
| 2894 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 2895 | ; |
|---|
| 2896 | |
|---|
| 2897 | abstract_array: |
|---|
| 2898 | array_dimension |
|---|
| 2899 | | '(' abstract_ptr ')' array_dimension |
|---|
| 2900 | { $$ = $2->addArray( $4 ); } |
|---|
| 2901 | | '(' abstract_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2902 | { $$ = $2->addArray( $4 ); } |
|---|
| 2903 | | '(' abstract_array ')' // redundant parenthesis |
|---|
| 2904 | { $$ = $2; } |
|---|
| 2905 | ; |
|---|
| 2906 | |
|---|
| 2907 | abstract_function: |
|---|
| 2908 | '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2909 | { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); } |
|---|
| 2910 | | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 2911 | { $$ = $2->addParamList( $6 ); } |
|---|
| 2912 | | '(' abstract_function ')' // redundant parenthesis |
|---|
| 2913 | { $$ = $2; } |
|---|
| 2914 | ; |
|---|
| 2915 | |
|---|
| 2916 | array_dimension: |
|---|
| 2917 | // Only the first dimension can be empty. |
|---|
| 2918 | '[' ']' |
|---|
| 2919 | { $$ = DeclarationNode::newArray( 0, 0, false ); } |
|---|
| 2920 | | '[' ']' multi_array_dimension |
|---|
| 2921 | { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); } |
|---|
| 2922 | | multi_array_dimension |
|---|
| 2923 | ; |
|---|
| 2924 | |
|---|
| 2925 | multi_array_dimension: |
|---|
| 2926 | '[' push assignment_expression pop ']' |
|---|
| 2927 | { $$ = DeclarationNode::newArray( $3, 0, false ); } |
|---|
| 2928 | | '[' push '*' pop ']' // C99 |
|---|
| 2929 | { $$ = DeclarationNode::newVarArray( 0 ); } |
|---|
| 2930 | | multi_array_dimension '[' push assignment_expression pop ']' |
|---|
| 2931 | { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); } |
|---|
| 2932 | | multi_array_dimension '[' push '*' pop ']' // C99 |
|---|
| 2933 | { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); } |
|---|
| 2934 | ; |
|---|
| 2935 | |
|---|
| 2936 | // This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no |
|---|
| 2937 | // identifier to which the type applies, e.g.: |
|---|
| 2938 | // |
|---|
| 2939 | // int f( int ); // not handled here |
|---|
| 2940 | // int f( int * ); // abstract function-prototype parameter; no parameter name specified |
|---|
| 2941 | // int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified |
|---|
| 2942 | // int f( int (int) ); // abstract function-prototype parameter; no parameter name specified |
|---|
| 2943 | // |
|---|
| 2944 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
|---|
| 2945 | // and functions versus pointers to arrays and functions. In addition, the pattern handles the |
|---|
| 2946 | // special meaning of parenthesis around a typedef name: |
|---|
| 2947 | // |
|---|
| 2948 | // ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in |
|---|
| 2949 | // parentheses is taken to be an abstract declarator that specifies a function with a single parameter, |
|---|
| 2950 | // not as redundant parentheses around the identifier." |
|---|
| 2951 | // |
|---|
| 2952 | // For example: |
|---|
| 2953 | // |
|---|
| 2954 | // typedef float T; |
|---|
| 2955 | // int f( int ( T [5] ) ); // see abstract_parameter_declarator |
|---|
| 2956 | // int g( int ( T ( int ) ) ); // see abstract_parameter_declarator |
|---|
| 2957 | // int f( int f1( T a[5] ) ); // see identifier_parameter_declarator |
|---|
| 2958 | // int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator |
|---|
| 2959 | // |
|---|
| 2960 | // In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and |
|---|
| 2961 | // not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of |
|---|
| 2962 | // functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and |
|---|
| 2963 | // functions. |
|---|
| 2964 | |
|---|
| 2965 | abstract_parameter_declarator: |
|---|
| 2966 | abstract_parameter_ptr |
|---|
| 2967 | | '&' MUTEX attribute_list_opt |
|---|
| 2968 | { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); } |
|---|
| 2969 | | abstract_parameter_array attribute_list_opt |
|---|
| 2970 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2971 | | abstract_parameter_function attribute_list_opt |
|---|
| 2972 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 2973 | ; |
|---|
| 2974 | |
|---|
| 2975 | abstract_parameter_ptr: |
|---|
| 2976 | ptrref_operator |
|---|
| 2977 | { $$ = DeclarationNode::newPointer( nullptr, $1 ); } |
|---|
| 2978 | | ptrref_operator type_qualifier_list |
|---|
| 2979 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
|---|
| 2980 | | ptrref_operator abstract_parameter_declarator |
|---|
| 2981 | { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); } |
|---|
| 2982 | | ptrref_operator type_qualifier_list abstract_parameter_declarator |
|---|
| 2983 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 2984 | | '(' abstract_parameter_ptr ')' attribute_list_opt |
|---|
| 2985 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 2986 | ; |
|---|
| 2987 | |
|---|
| 2988 | abstract_parameter_array: |
|---|
| 2989 | array_parameter_dimension |
|---|
| 2990 | | '(' abstract_parameter_ptr ')' array_parameter_dimension |
|---|
| 2991 | { $$ = $2->addArray( $4 ); } |
|---|
| 2992 | | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 2993 | { $$ = $2->addArray( $4 ); } |
|---|
| 2994 | | '(' abstract_parameter_array ')' // redundant parenthesis |
|---|
| 2995 | { $$ = $2; } |
|---|
| 2996 | ; |
|---|
| 2997 | |
|---|
| 2998 | abstract_parameter_function: |
|---|
| 2999 | '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 3000 | { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); } |
|---|
| 3001 | | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 3002 | { $$ = $2->addParamList( $6 ); } |
|---|
| 3003 | | '(' abstract_parameter_function ')' // redundant parenthesis |
|---|
| 3004 | { $$ = $2; } |
|---|
| 3005 | ; |
|---|
| 3006 | |
|---|
| 3007 | array_parameter_dimension: |
|---|
| 3008 | // Only the first dimension can be empty or have qualifiers. |
|---|
| 3009 | array_parameter_1st_dimension |
|---|
| 3010 | | array_parameter_1st_dimension multi_array_dimension |
|---|
| 3011 | { $$ = $1->addArray( $2 ); } |
|---|
| 3012 | | multi_array_dimension |
|---|
| 3013 | ; |
|---|
| 3014 | |
|---|
| 3015 | // The declaration of an array parameter has additional syntax over arrays in normal variable declarations: |
|---|
| 3016 | // |
|---|
| 3017 | // ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in |
|---|
| 3018 | // a declaration of a function parameter with an array type, and then only in the outermost array type derivation." |
|---|
| 3019 | |
|---|
| 3020 | array_parameter_1st_dimension: |
|---|
| 3021 | '[' ']' |
|---|
| 3022 | { $$ = DeclarationNode::newArray( 0, 0, false ); } |
|---|
| 3023 | // multi_array_dimension handles the '[' '*' ']' case |
|---|
| 3024 | | '[' push type_qualifier_list '*' pop ']' // remaining C99 |
|---|
| 3025 | { $$ = DeclarationNode::newVarArray( $3 ); } |
|---|
| 3026 | | '[' push type_qualifier_list pop ']' |
|---|
| 3027 | { $$ = DeclarationNode::newArray( 0, $3, false ); } |
|---|
| 3028 | // multi_array_dimension handles the '[' assignment_expression ']' case |
|---|
| 3029 | | '[' push type_qualifier_list assignment_expression pop ']' |
|---|
| 3030 | { $$ = DeclarationNode::newArray( $4, $3, false ); } |
|---|
| 3031 | | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']' |
|---|
| 3032 | { $$ = DeclarationNode::newArray( $5, $4, true ); } |
|---|
| 3033 | | '[' push type_qualifier_list STATIC assignment_expression pop ']' |
|---|
| 3034 | { $$ = DeclarationNode::newArray( $5, $3, true ); } |
|---|
| 3035 | ; |
|---|
| 3036 | |
|---|
| 3037 | // This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer. |
|---|
| 3038 | // |
|---|
| 3039 | // struct S { |
|---|
| 3040 | // int; |
|---|
| 3041 | // int *; |
|---|
| 3042 | // int [10]; |
|---|
| 3043 | // int (*)(); |
|---|
| 3044 | // }; |
|---|
| 3045 | |
|---|
| 3046 | variable_abstract_declarator: |
|---|
| 3047 | variable_abstract_ptr |
|---|
| 3048 | | variable_abstract_array attribute_list_opt |
|---|
| 3049 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 3050 | | variable_abstract_function attribute_list_opt |
|---|
| 3051 | { $$ = $1->addQualifiers( $2 ); } |
|---|
| 3052 | ; |
|---|
| 3053 | |
|---|
| 3054 | variable_abstract_ptr: |
|---|
| 3055 | ptrref_operator |
|---|
| 3056 | { $$ = DeclarationNode::newPointer( 0, $1 ); } |
|---|
| 3057 | | ptrref_operator type_qualifier_list |
|---|
| 3058 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
|---|
| 3059 | | ptrref_operator variable_abstract_declarator |
|---|
| 3060 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3061 | | ptrref_operator type_qualifier_list variable_abstract_declarator |
|---|
| 3062 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
|---|
| 3063 | | '(' variable_abstract_ptr ')' attribute_list_opt |
|---|
| 3064 | { $$ = $2->addQualifiers( $4 ); } |
|---|
| 3065 | ; |
|---|
| 3066 | |
|---|
| 3067 | variable_abstract_array: |
|---|
| 3068 | array_dimension |
|---|
| 3069 | | '(' variable_abstract_ptr ')' array_dimension |
|---|
| 3070 | { $$ = $2->addArray( $4 ); } |
|---|
| 3071 | | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis |
|---|
| 3072 | { $$ = $2->addArray( $4 ); } |
|---|
| 3073 | | '(' variable_abstract_array ')' // redundant parenthesis |
|---|
| 3074 | { $$ = $2; } |
|---|
| 3075 | ; |
|---|
| 3076 | |
|---|
| 3077 | variable_abstract_function: |
|---|
| 3078 | '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
|---|
| 3079 | { $$ = $2->addParamList( $6 ); } |
|---|
| 3080 | | '(' variable_abstract_function ')' // redundant parenthesis |
|---|
| 3081 | { $$ = $2; } |
|---|
| 3082 | ; |
|---|
| 3083 | |
|---|
| 3084 | // This pattern parses a new-style declaration for a parameter variable or function prototype that is either an |
|---|
| 3085 | // identifier or typedef name and allows the C99 array options, which can only appear in a parameter list. |
|---|
| 3086 | |
|---|
| 3087 | cfa_identifier_parameter_declarator_tuple: // CFA |
|---|
| 3088 | cfa_identifier_parameter_declarator_no_tuple |
|---|
| 3089 | | cfa_abstract_tuple |
|---|
| 3090 | | type_qualifier_list cfa_abstract_tuple |
|---|
| 3091 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 3092 | ; |
|---|
| 3093 | |
|---|
| 3094 | cfa_identifier_parameter_declarator_no_tuple: // CFA |
|---|
| 3095 | cfa_identifier_parameter_ptr |
|---|
| 3096 | | cfa_identifier_parameter_array |
|---|
| 3097 | ; |
|---|
| 3098 | |
|---|
| 3099 | cfa_identifier_parameter_ptr: // CFA |
|---|
| 3100 | // No SUE declaration in parameter list. |
|---|
| 3101 | ptrref_operator type_specifier_nobody |
|---|
| 3102 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3103 | | type_qualifier_list ptrref_operator type_specifier_nobody |
|---|
| 3104 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3105 | | ptrref_operator cfa_abstract_function |
|---|
| 3106 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3107 | | type_qualifier_list ptrref_operator cfa_abstract_function |
|---|
| 3108 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3109 | | ptrref_operator cfa_identifier_parameter_declarator_tuple |
|---|
| 3110 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3111 | | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple |
|---|
| 3112 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3113 | ; |
|---|
| 3114 | |
|---|
| 3115 | cfa_identifier_parameter_array: // CFA |
|---|
| 3116 | // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to |
|---|
| 3117 | // shift/reduce conflict with new-style empty (void) function return type. |
|---|
| 3118 | '[' ']' type_specifier_nobody |
|---|
| 3119 | { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
|---|
| 3120 | | cfa_array_parameter_1st_dimension type_specifier_nobody |
|---|
| 3121 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3122 | | '[' ']' multi_array_dimension type_specifier_nobody |
|---|
| 3123 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
|---|
| 3124 | | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody |
|---|
| 3125 | { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); } |
|---|
| 3126 | | multi_array_dimension type_specifier_nobody |
|---|
| 3127 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3128 | |
|---|
| 3129 | | '[' ']' cfa_identifier_parameter_ptr |
|---|
| 3130 | { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
|---|
| 3131 | | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr |
|---|
| 3132 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3133 | | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr |
|---|
| 3134 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
|---|
| 3135 | | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr |
|---|
| 3136 | { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); } |
|---|
| 3137 | | multi_array_dimension cfa_identifier_parameter_ptr |
|---|
| 3138 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3139 | ; |
|---|
| 3140 | |
|---|
| 3141 | cfa_array_parameter_1st_dimension: |
|---|
| 3142 | '[' push type_qualifier_list '*' pop ']' // remaining C99 |
|---|
| 3143 | { $$ = DeclarationNode::newVarArray( $3 ); } |
|---|
| 3144 | | '[' push type_qualifier_list assignment_expression pop ']' |
|---|
| 3145 | { $$ = DeclarationNode::newArray( $4, $3, false ); } |
|---|
| 3146 | | '[' push declaration_qualifier_list assignment_expression pop ']' |
|---|
| 3147 | // declaration_qualifier_list must be used because of shift/reduce conflict with |
|---|
| 3148 | // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot |
|---|
| 3149 | // appear in this context. |
|---|
| 3150 | { $$ = DeclarationNode::newArray( $4, $3, true ); } |
|---|
| 3151 | | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']' |
|---|
| 3152 | { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); } |
|---|
| 3153 | ; |
|---|
| 3154 | |
|---|
| 3155 | // This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no |
|---|
| 3156 | // identifier to which the type applies, e.g.: |
|---|
| 3157 | // |
|---|
| 3158 | // [int] f( int ); // abstract variable parameter; no parameter name specified |
|---|
| 3159 | // [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified |
|---|
| 3160 | // |
|---|
| 3161 | // These rules need LR(3): |
|---|
| 3162 | // |
|---|
| 3163 | // cfa_abstract_tuple identifier_or_type_name |
|---|
| 3164 | // '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')' |
|---|
| 3165 | // |
|---|
| 3166 | // since a function return type can be syntactically identical to a tuple type: |
|---|
| 3167 | // |
|---|
| 3168 | // [int, int] t; |
|---|
| 3169 | // [int, int] f( int ); |
|---|
| 3170 | // |
|---|
| 3171 | // Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce |
|---|
| 3172 | // cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary |
|---|
| 3173 | // lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are |
|---|
| 3174 | // duplicated when appearing with cfa_function_specifier. |
|---|
| 3175 | |
|---|
| 3176 | cfa_abstract_declarator_tuple: // CFA |
|---|
| 3177 | cfa_abstract_tuple |
|---|
| 3178 | | type_qualifier_list cfa_abstract_tuple |
|---|
| 3179 | { $$ = $2->addQualifiers( $1 ); } |
|---|
| 3180 | | cfa_abstract_declarator_no_tuple |
|---|
| 3181 | ; |
|---|
| 3182 | |
|---|
| 3183 | cfa_abstract_declarator_no_tuple: // CFA |
|---|
| 3184 | cfa_abstract_ptr |
|---|
| 3185 | | cfa_abstract_array |
|---|
| 3186 | ; |
|---|
| 3187 | |
|---|
| 3188 | cfa_abstract_ptr: // CFA |
|---|
| 3189 | ptrref_operator type_specifier |
|---|
| 3190 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3191 | | type_qualifier_list ptrref_operator type_specifier |
|---|
| 3192 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3193 | | ptrref_operator cfa_abstract_function |
|---|
| 3194 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3195 | | type_qualifier_list ptrref_operator cfa_abstract_function |
|---|
| 3196 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3197 | | ptrref_operator cfa_abstract_declarator_tuple |
|---|
| 3198 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
|---|
| 3199 | | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple |
|---|
| 3200 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
|---|
| 3201 | ; |
|---|
| 3202 | |
|---|
| 3203 | cfa_abstract_array: // CFA |
|---|
| 3204 | // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with |
|---|
| 3205 | // empty (void) function return type. |
|---|
| 3206 | '[' ']' type_specifier |
|---|
| 3207 | { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
|---|
| 3208 | | '[' ']' multi_array_dimension type_specifier |
|---|
| 3209 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
|---|
| 3210 | | multi_array_dimension type_specifier |
|---|
| 3211 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3212 | | '[' ']' cfa_abstract_ptr |
|---|
| 3213 | { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
|---|
| 3214 | | '[' ']' multi_array_dimension cfa_abstract_ptr |
|---|
| 3215 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
|---|
| 3216 | | multi_array_dimension cfa_abstract_ptr |
|---|
| 3217 | { $$ = $2->addNewArray( $1 ); } |
|---|
| 3218 | ; |
|---|
| 3219 | |
|---|
| 3220 | cfa_abstract_tuple: // CFA |
|---|
| 3221 | '[' push cfa_abstract_parameter_list pop ']' |
|---|
| 3222 | { $$ = DeclarationNode::newTuple( $3 ); } |
|---|
| 3223 | ; |
|---|
| 3224 | |
|---|
| 3225 | cfa_abstract_function: // CFA |
|---|
| 3226 | // '[' ']' '(' cfa_parameter_type_list_opt ')' |
|---|
| 3227 | // { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); } |
|---|
| 3228 | cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 3229 | { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); } |
|---|
| 3230 | | cfa_function_return '(' push cfa_parameter_type_list_opt pop ')' |
|---|
| 3231 | { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); } |
|---|
| 3232 | ; |
|---|
| 3233 | |
|---|
| 3234 | // 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in |
|---|
| 3235 | // each declaration, and in the specifier-qualifier list in each structure declaration and type name." |
|---|
| 3236 | // |
|---|
| 3237 | // 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of |
|---|
| 3238 | // the declaration specifiers in a declaration is an obsolescent feature." |
|---|
| 3239 | // |
|---|
| 3240 | // 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not |
|---|
| 3241 | // prototype-format parameter type declarators) is an obsolescent feature." |
|---|
| 3242 | // |
|---|
| 3243 | // 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and |
|---|
| 3244 | // declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature. |
|---|
| 3245 | |
|---|
| 3246 | //************************* MISCELLANEOUS ******************************** |
|---|
| 3247 | |
|---|
| 3248 | comma_opt: // redundant comma |
|---|
| 3249 | // empty |
|---|
| 3250 | | ',' |
|---|
| 3251 | ; |
|---|
| 3252 | |
|---|
| 3253 | default_initialize_opt: |
|---|
| 3254 | // empty |
|---|
| 3255 | { $$ = nullptr; } |
|---|
| 3256 | | '=' assignment_expression |
|---|
| 3257 | { $$ = $2; } |
|---|
| 3258 | ; |
|---|
| 3259 | |
|---|
| 3260 | %% |
|---|
| 3261 | // ----end of grammar---- |
|---|
| 3262 | |
|---|
| 3263 | // Local Variables: // |
|---|
| 3264 | // mode: c++ // |
|---|
| 3265 | // tab-width: 4 // |
|---|
| 3266 | // compile-command: "make install" // |
|---|
| 3267 | // End: // |
|---|
