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 : Thu May 24 16:49:58 2018 |
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13 | // Update Count : 3367 |
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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 | // Currently, the forall is associated with the routine, and the generic type has to be separately defined: |
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122 | // forall( otype T ) struct S { int T; }; |
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123 | // forall( otype W ) bar( W ) {} |
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124 | |
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125 | void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) { |
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126 | if ( declSpec->type->kind == TypeData::Aggregate ) { // ignore aggregate definition |
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127 | funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type |
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128 | declSpec->type->aggregate.params = nullptr; |
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129 | } // if |
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130 | } // rebindForall |
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131 | |
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132 | NameExpr * build_postfix_name( const string * name ) { |
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133 | NameExpr * new_name = build_varref( new string( "?`" + *name ) ); |
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134 | delete name; |
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135 | return new_name; |
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136 | } // build_postfix_name |
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137 | |
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138 | bool forall = false, xxx = false; // aggregate have one or more forall qualifiers ? |
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139 | |
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140 | // https://www.gnu.org/software/bison/manual/bison.html#Location-Type |
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141 | #define YYLLOC_DEFAULT(Cur, Rhs, N) \ |
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142 | if ( N ) { \ |
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143 | (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \ |
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144 | (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \ |
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145 | (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \ |
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146 | (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \ |
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147 | (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \ |
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148 | } else { \ |
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149 | (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \ |
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150 | (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \ |
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151 | (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \ |
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152 | } |
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153 | %} |
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154 | |
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155 | %define parse.error verbose |
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156 | |
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157 | // Types declaration for productions |
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158 | %union |
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159 | { |
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160 | Token tok; |
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161 | ParseNode * pn; |
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162 | ExpressionNode * en; |
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163 | DeclarationNode * decl; |
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164 | DeclarationNode::Aggregate aggKey; |
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165 | DeclarationNode::TypeClass tclass; |
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166 | StatementNode * sn; |
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167 | WaitForStmt * wfs; |
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168 | Expression * constant; |
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169 | IfCtl * ifctl; |
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170 | ForCtl * fctl; |
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171 | LabelNode * label; |
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172 | InitializerNode * in; |
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173 | OperKinds op; |
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174 | std::string * str; |
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175 | bool flag; |
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176 | CatchStmt::Kind catch_kind; |
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177 | } |
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178 | |
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179 | //************************* TERMINAL TOKENS ******************************** |
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180 | |
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181 | // keywords |
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182 | %token TYPEDEF |
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183 | %token EXTERN STATIC AUTO REGISTER |
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184 | %token THREADLOCAL // C11 |
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185 | %token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1) |
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186 | %token NORETURN // C11 |
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187 | %token CONST VOLATILE |
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188 | %token RESTRICT // C99 |
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189 | %token ATOMIC // C11 |
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190 | %token FORALL MUTEX VIRTUAL // CFA |
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191 | %token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED |
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192 | %token BOOL COMPLEX IMAGINARY // C99 |
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193 | %token INT128 FLOAT80 FLOAT128 // GCC |
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194 | %token ZERO_T ONE_T // CFA |
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195 | %token VALIST // GCC |
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196 | %token TYPEOF LABEL // GCC |
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197 | %token ENUM STRUCT UNION |
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198 | %token EXCEPTION // CFA |
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199 | %token COROUTINE MONITOR THREAD // CFA |
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200 | %token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA |
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201 | %token SIZEOF OFFSETOF |
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202 | %token ATTRIBUTE EXTENSION // GCC |
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203 | %token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN |
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204 | %token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA |
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205 | %token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1) |
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206 | %token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11 |
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207 | |
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208 | // names and constants: lexer differentiates between identifier and typedef names |
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209 | %token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname |
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210 | %token<tok> TIMEOUT WOR |
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211 | %token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname |
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212 | %token<tok> INTEGERconstant CHARACTERconstant STRINGliteral |
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213 | %token<tok> DIRECTIVE |
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214 | // Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and |
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215 | // 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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216 | // converted into the tuple index (.)(1). e.g., 3.x |
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217 | %token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant |
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218 | |
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219 | // multi-character operators |
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220 | %token ARROW // -> |
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221 | %token ICR DECR // ++ -- |
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222 | %token LS RS // << >> |
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223 | %token LE GE EQ NE // <= >= == != |
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224 | %token ANDAND OROR // && || |
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225 | %token ELLIPSIS // ... |
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226 | |
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227 | %token EXPassign MULTassign DIVassign MODassign // \= *= /= %= |
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228 | %token PLUSassign MINUSassign // += -= |
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229 | %token LSassign RSassign // <<= >>= |
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230 | %token ANDassign ERassign ORassign // &= ^= |= |
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231 | |
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232 | %token ATassign // @= |
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233 | |
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234 | %type<tok> identifier no_attr_identifier |
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235 | %type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name |
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236 | %type<tok> quasi_keyword |
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237 | %type<constant> string_literal |
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238 | %type<str> string_literal_list |
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239 | |
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240 | // expressions |
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241 | %type<en> constant |
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242 | %type<en> tuple tuple_expression_list |
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243 | %type<op> ptrref_operator unary_operator assignment_operator |
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244 | %type<en> primary_expression postfix_expression unary_expression |
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245 | %type<en> cast_expression exponential_expression multiplicative_expression additive_expression |
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246 | %type<en> shift_expression relational_expression equality_expression |
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247 | %type<en> AND_expression exclusive_OR_expression inclusive_OR_expression |
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248 | %type<en> logical_AND_expression logical_OR_expression |
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249 | %type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt |
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250 | %type<en> comma_expression comma_expression_opt |
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251 | %type<en> argument_expression_list argument_expression default_initialize_opt |
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252 | %type<ifctl> if_control_expression |
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253 | %type<fctl> for_control_expression |
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254 | %type<en> subrange |
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255 | %type<decl> asm_name_opt |
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256 | %type<en> asm_operands_opt asm_operands_list asm_operand |
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257 | %type<label> label_list |
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258 | %type<en> asm_clobbers_list_opt |
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259 | %type<flag> asm_volatile_opt |
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260 | %type<en> handler_predicate_opt |
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261 | |
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262 | // statements |
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263 | %type<sn> statement labeled_statement compound_statement |
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264 | %type<sn> statement_decl statement_decl_list statement_list_nodecl |
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265 | %type<sn> selection_statement |
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266 | %type<sn> switch_clause_list_opt switch_clause_list |
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267 | %type<en> case_value |
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268 | %type<sn> case_clause case_value_list case_label case_label_list |
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269 | %type<sn> iteration_statement jump_statement |
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270 | %type<sn> expression_statement asm_statement |
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271 | %type<sn> with_statement |
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272 | %type<en> with_clause_opt |
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273 | %type<sn> exception_statement handler_clause finally_clause |
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274 | %type<catch_kind> handler_key |
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275 | %type<sn> mutex_statement |
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276 | %type<en> when_clause when_clause_opt waitfor timeout |
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277 | %type<sn> waitfor_statement |
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278 | %type<wfs> waitfor_clause |
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279 | |
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280 | // declarations |
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281 | %type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension |
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282 | %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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283 | %type<decl> abstract_parameter_declaration |
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284 | |
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285 | %type<aggKey> aggregate_key |
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286 | %type<decl> aggregate_type aggregate_type_nobody |
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287 | |
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288 | %type<decl> assertion assertion_list assertion_list_opt |
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289 | |
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290 | %type<en> bit_subrange_size_opt bit_subrange_size |
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291 | |
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292 | %type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type |
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293 | |
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294 | %type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier |
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295 | |
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296 | %type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list |
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297 | %type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list |
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298 | |
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299 | %type<decl> elaborated_type elaborated_type_nobody |
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300 | |
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301 | %type<decl> enumerator_list enum_type enum_type_nobody |
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302 | %type<en> enumerator_value_opt |
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303 | |
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304 | %type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt |
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305 | |
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306 | %type<decl> field_declaration field_declaration_list_opt field_declarator_opt field_declaring_list |
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307 | %type<en> field field_list field_name fraction_constants_opt |
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308 | |
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309 | %type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr |
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310 | |
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311 | %type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function |
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312 | %type<decl> identifier_list |
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313 | |
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314 | %type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple |
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315 | %type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list |
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316 | %type<decl> cfa_abstract_ptr cfa_abstract_tuple |
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317 | |
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318 | %type<decl> cfa_array_parameter_1st_dimension |
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319 | |
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320 | %type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list |
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321 | %type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier |
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322 | |
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323 | %type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple |
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324 | %type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr |
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325 | |
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326 | %type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list_opt |
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327 | |
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328 | %type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier |
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329 | |
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330 | %type<decl> c_declaration static_assert |
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331 | %type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array |
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332 | %type<decl> KR_declaration_list KR_declaration_list_opt |
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333 | |
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334 | %type<decl> parameter_declaration parameter_list parameter_type_list_opt |
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335 | |
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336 | %type<decl> paren_identifier paren_type |
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337 | |
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338 | %type<decl> storage_class storage_class_list |
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339 | |
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340 | %type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody |
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341 | |
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342 | %type<tclass> type_class |
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343 | %type<decl> type_declarator type_declarator_name type_declaring_list |
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344 | |
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345 | %type<decl> type_declaration_specifier type_type_specifier type_name typegen_name |
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346 | %type<decl> typedef typedef_declaration typedef_expression |
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347 | |
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348 | %type<decl> variable_type_redeclarator type_ptr type_array type_function |
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349 | |
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350 | %type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function |
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351 | |
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352 | %type<decl> type type_no_function |
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353 | %type<decl> type_parameter type_parameter_list type_initializer_opt |
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354 | |
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355 | %type<en> type_list |
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356 | |
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357 | %type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list |
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358 | %type<decl> type_specifier type_specifier_nobody |
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359 | |
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360 | %type<decl> variable_declarator variable_ptr variable_array variable_function |
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361 | %type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function |
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362 | |
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363 | %type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name |
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364 | |
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365 | // initializers |
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366 | %type<in> initializer initializer_list_opt initializer_opt |
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367 | |
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368 | // designators |
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369 | %type<en> designator designator_list designation |
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370 | |
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371 | |
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372 | // Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous: |
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373 | // .---------. matches IF '(' comma_expression ')' statement . (reduce) |
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374 | // if ( C ) S1 else S2 |
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375 | // `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */ |
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376 | // Similar issues exit with the waitfor statement. |
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377 | |
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378 | // Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left |
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379 | // associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE. |
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380 | %precedence THEN // rule precedence for IF/WAITFOR statement |
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381 | %precedence WOR // token precedence for start of WOR in WAITFOR statement |
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382 | %precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement |
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383 | %precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement |
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384 | |
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385 | // Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous: |
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386 | // forall( otype T ) struct Foo { T v; }; |
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387 | // .-----. matches pointer to function returning a generic (which is impossible without a type) |
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388 | // Foo ( *fp )( int ); |
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389 | // `---' matches start of TYPEGENname '(' |
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390 | // Must be: |
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391 | // Foo( int ) ( *fp )( int ); |
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392 | |
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393 | // Order of these lines matters (low-to-high precedence). |
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394 | %precedence TYPEGENname |
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395 | %precedence '(' |
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396 | |
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397 | %locations // support location tracking for error messages |
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398 | |
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399 | %start translation_unit // parse-tree root |
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400 | |
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401 | %% |
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402 | //************************* Namespace Management ******************************** |
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403 | |
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404 | // The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols |
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405 | // "identifier", "TYPEDEFname", and "TYPEGENname" that are lexically identical. While it is possible to write a purely |
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406 | // context-free grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. |
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407 | // Hence, this grammar uses the ANSI style. |
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408 | // |
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409 | // Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those |
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410 | // introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter |
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411 | // type name creates a third class of identifiers that must be distinguished by the scanner. |
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412 | // |
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413 | // Since the scanner cannot distinguish among the different classes of identifiers without some context information, it |
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414 | // accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic |
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415 | // actions during the parser update this data structure when the class of identifiers change. |
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416 | // |
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417 | // Because the Cforall language is block-scoped, an identifier can change its class in a local scope; it must revert to |
---|
418 | // its original class at the end of the block. Since type names can be local to a particular declaration, each |
---|
419 | // declaration is itself a scope. This requires distinguishing between type names that are local to the current |
---|
420 | // declaration scope and those that persist past the end of the declaration (i.e., names defined in "typedef" or "otype" |
---|
421 | // declarations). |
---|
422 | // |
---|
423 | // The non-terminals "push" and "pop" denote the opening and closing of scopes. Every push must have a matching pop, |
---|
424 | // although it is regrettable the matching pairs do not always occur within the same rule. These non-terminals may |
---|
425 | // appear in more contexts than strictly necessary from a semantic point of view. |
---|
426 | |
---|
427 | push: |
---|
428 | { typedefTable.enterScope(); } |
---|
429 | ; |
---|
430 | |
---|
431 | pop: |
---|
432 | { typedefTable.leaveScope(); } |
---|
433 | ; |
---|
434 | |
---|
435 | //************************* CONSTANTS ******************************** |
---|
436 | |
---|
437 | constant: |
---|
438 | // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant". |
---|
439 | INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); } |
---|
440 | | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
---|
441 | | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
---|
442 | | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); } |
---|
443 | | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); } |
---|
444 | ; |
---|
445 | |
---|
446 | quasi_keyword: // CFA |
---|
447 | TIMEOUT |
---|
448 | | WOR |
---|
449 | ; |
---|
450 | |
---|
451 | identifier: |
---|
452 | IDENTIFIER |
---|
453 | | ATTR_IDENTIFIER // CFA |
---|
454 | | quasi_keyword |
---|
455 | ; |
---|
456 | |
---|
457 | no_attr_identifier: |
---|
458 | IDENTIFIER |
---|
459 | | quasi_keyword |
---|
460 | ; |
---|
461 | |
---|
462 | string_literal: |
---|
463 | string_literal_list { $$ = build_constantStr( *$1 ); } |
---|
464 | ; |
---|
465 | |
---|
466 | string_literal_list: // juxtaposed strings are concatenated |
---|
467 | STRINGliteral { $$ = $1; } // conversion from tok to str |
---|
468 | | string_literal_list STRINGliteral |
---|
469 | { |
---|
470 | if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st |
---|
471 | delete $2; // allocated by lexer |
---|
472 | $$ = $1; // conversion from tok to str |
---|
473 | } |
---|
474 | ; |
---|
475 | |
---|
476 | //************************* EXPRESSIONS ******************************** |
---|
477 | |
---|
478 | primary_expression: |
---|
479 | IDENTIFIER // typedef name cannot be used as a variable name |
---|
480 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
---|
481 | | quasi_keyword |
---|
482 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
---|
483 | | tuple |
---|
484 | | '(' comma_expression ')' |
---|
485 | { $$ = $2; } |
---|
486 | | '(' compound_statement ')' // GCC, lambda expression |
---|
487 | { $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); } |
---|
488 | | constant '`' IDENTIFIER // CFA, postfix call |
---|
489 | { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); } |
---|
490 | | string_literal '`' IDENTIFIER // CFA, postfix call |
---|
491 | { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( $1 ) ) ); } |
---|
492 | | IDENTIFIER '`' IDENTIFIER // CFA, postfix call |
---|
493 | { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( build_varref( $1 ) ) ) ); } |
---|
494 | | tuple '`' IDENTIFIER // CFA, postfix call |
---|
495 | { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); } |
---|
496 | | '(' comma_expression ')' '`' IDENTIFIER // CFA, postfix call |
---|
497 | { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $5 ) ), $2 ) ); } |
---|
498 | | type_name '.' no_attr_identifier // CFA, nested type |
---|
499 | { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; } |
---|
500 | | type_name '.' '[' field_list ']' // CFA, nested type / tuple field selector |
---|
501 | { SemanticError( yylloc, "Qualified name is currently unimplemented." ); $$ = nullptr; } |
---|
502 | | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11 |
---|
503 | { SemanticError( yylloc, "_Generic is currently unimplemented." ); $$ = nullptr; } |
---|
504 | ; |
---|
505 | |
---|
506 | generic_assoc_list: // C11 |
---|
507 | | generic_association |
---|
508 | | generic_assoc_list ',' generic_association |
---|
509 | ; |
---|
510 | |
---|
511 | generic_association: // C11 |
---|
512 | type_no_function ':' assignment_expression |
---|
513 | | DEFAULT ':' assignment_expression |
---|
514 | ; |
---|
515 | |
---|
516 | postfix_expression: |
---|
517 | primary_expression |
---|
518 | | postfix_expression '[' assignment_expression ']' |
---|
519 | // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a |
---|
520 | // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be |
---|
521 | // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is |
---|
522 | // equivalent to the old x[i,j]. |
---|
523 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $3 ) ); } |
---|
524 | | postfix_expression '{' argument_expression_list '}' // CFA, constructor call |
---|
525 | { |
---|
526 | Token fn; |
---|
527 | fn.str = new std::string( "?{}" ); // location undefined - use location of '{'? |
---|
528 | $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) ); |
---|
529 | } |
---|
530 | | postfix_expression '(' argument_expression_list ')' |
---|
531 | { $$ = new ExpressionNode( build_func( $1, $3 ) ); } |
---|
532 | | postfix_expression '.' no_attr_identifier |
---|
533 | { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); } |
---|
534 | | postfix_expression '.' INTEGERconstant // CFA, tuple index |
---|
535 | { $$ = new ExpressionNode( build_fieldSel( $1, build_constantInteger( *$3 ) ) ); } |
---|
536 | | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index |
---|
537 | { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); } |
---|
538 | | postfix_expression '.' '[' field_list ']' // CFA, tuple field selector |
---|
539 | { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); } |
---|
540 | | postfix_expression ARROW no_attr_identifier |
---|
541 | { |
---|
542 | $$ = new ExpressionNode( build_pfieldSel( $1, *$3 == "0" || *$3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) ); |
---|
543 | } |
---|
544 | | postfix_expression ARROW INTEGERconstant // CFA, tuple index |
---|
545 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); } |
---|
546 | | postfix_expression ARROW '[' field_list ']' // CFA, tuple field selector |
---|
547 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); } |
---|
548 | | postfix_expression ICR |
---|
549 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); } |
---|
550 | | postfix_expression DECR |
---|
551 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); } |
---|
552 | | '(' type_no_function ')' '{' initializer_list_opt comma_opt '}' // C99, compound-literal |
---|
553 | { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); } |
---|
554 | | '(' type_no_function ')' '@' '{' initializer_list_opt comma_opt '}' // CFA, explicit C compound-literal |
---|
555 | { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); } |
---|
556 | | '^' primary_expression '{' argument_expression_list '}' // CFA |
---|
557 | { |
---|
558 | Token fn; |
---|
559 | fn.str = new string( "^?{}" ); // location undefined |
---|
560 | $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) ); |
---|
561 | } |
---|
562 | ; |
---|
563 | |
---|
564 | argument_expression_list: |
---|
565 | argument_expression |
---|
566 | | argument_expression_list ',' argument_expression |
---|
567 | { $$ = (ExpressionNode *)( $1->set_last( $3 )); } |
---|
568 | ; |
---|
569 | |
---|
570 | argument_expression: |
---|
571 | // empty |
---|
572 | { $$ = nullptr; } |
---|
573 | // | '@' // use default argument |
---|
574 | // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); } |
---|
575 | | assignment_expression |
---|
576 | ; |
---|
577 | |
---|
578 | field_list: // CFA, tuple field selector |
---|
579 | field |
---|
580 | | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
---|
581 | ; |
---|
582 | |
---|
583 | field: // CFA, tuple field selector |
---|
584 | field_name |
---|
585 | | FLOATING_DECIMALconstant field |
---|
586 | { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); } |
---|
587 | | FLOATING_DECIMALconstant '[' field_list ']' |
---|
588 | { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $3 ) ) ); } |
---|
589 | | field_name '.' field |
---|
590 | { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); } |
---|
591 | | field_name '.' '[' field_list ']' |
---|
592 | { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $4 ) ) ); } |
---|
593 | | field_name ARROW field |
---|
594 | { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); } |
---|
595 | | field_name ARROW '[' field_list ']' |
---|
596 | { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $4 ) ) ); } |
---|
597 | ; |
---|
598 | |
---|
599 | field_name: |
---|
600 | INTEGERconstant fraction_constants_opt |
---|
601 | { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); } |
---|
602 | | FLOATINGconstant fraction_constants_opt |
---|
603 | { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); } |
---|
604 | | no_attr_identifier fraction_constants_opt |
---|
605 | { |
---|
606 | $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) ); |
---|
607 | } |
---|
608 | ; |
---|
609 | |
---|
610 | fraction_constants_opt: |
---|
611 | // empty |
---|
612 | { $$ = nullptr; } |
---|
613 | | fraction_constants_opt FLOATING_FRACTIONconstant |
---|
614 | { |
---|
615 | Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 ); |
---|
616 | $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant ); |
---|
617 | } |
---|
618 | ; |
---|
619 | |
---|
620 | unary_expression: |
---|
621 | postfix_expression |
---|
622 | // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires |
---|
623 | // semantics checks, e.g., ++3, 3--, *3, &&3 |
---|
624 | | constant |
---|
625 | { $$ = $1; } |
---|
626 | | string_literal |
---|
627 | { $$ = new ExpressionNode( $1 ); } |
---|
628 | | EXTENSION cast_expression // GCC |
---|
629 | { $$ = $2->set_extension( true ); } |
---|
630 | // '*' ('&') is separated from unary_operator because of shift/reduce conflict in: |
---|
631 | // { * X; } // dereference X |
---|
632 | // { * int X; } // CFA declaration of pointer to int |
---|
633 | | ptrref_operator cast_expression // CFA |
---|
634 | { |
---|
635 | switch ( $1 ) { |
---|
636 | case OperKinds::AddressOf: |
---|
637 | $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ); |
---|
638 | break; |
---|
639 | case OperKinds::PointTo: |
---|
640 | $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); |
---|
641 | break; |
---|
642 | case OperKinds::And: |
---|
643 | $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ) ); |
---|
644 | break; |
---|
645 | default: |
---|
646 | assert( false ); |
---|
647 | } |
---|
648 | } |
---|
649 | | unary_operator cast_expression |
---|
650 | { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); } |
---|
651 | | ICR unary_expression |
---|
652 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); } |
---|
653 | | DECR unary_expression |
---|
654 | { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); } |
---|
655 | | SIZEOF unary_expression |
---|
656 | { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild< Expression >( $2 ) ) ); } |
---|
657 | | SIZEOF '(' type_no_function ')' |
---|
658 | { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); } |
---|
659 | | ALIGNOF unary_expression // GCC, variable alignment |
---|
660 | { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild< Expression >( $2 ) ) ); } |
---|
661 | | ALIGNOF '(' type_no_function ')' // GCC, type alignment |
---|
662 | { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); } |
---|
663 | | OFFSETOF '(' type_no_function ',' no_attr_identifier ')' |
---|
664 | { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); } |
---|
665 | | ATTR_IDENTIFIER |
---|
666 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ) ) ); } |
---|
667 | | ATTR_IDENTIFIER '(' argument_expression ')' |
---|
668 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
---|
669 | | ATTR_IDENTIFIER '(' type ')' |
---|
670 | { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuildType( $3 ) ) ); } |
---|
671 | ; |
---|
672 | |
---|
673 | ptrref_operator: |
---|
674 | '*' { $$ = OperKinds::PointTo; } |
---|
675 | | '&' { $$ = OperKinds::AddressOf; } |
---|
676 | // GCC, address of label must be handled by semantic check for ref,ref,label |
---|
677 | | ANDAND { $$ = OperKinds::And; } |
---|
678 | ; |
---|
679 | |
---|
680 | unary_operator: |
---|
681 | '+' { $$ = OperKinds::UnPlus; } |
---|
682 | | '-' { $$ = OperKinds::UnMinus; } |
---|
683 | | '!' { $$ = OperKinds::Neg; } |
---|
684 | | '~' { $$ = OperKinds::BitNeg; } |
---|
685 | ; |
---|
686 | |
---|
687 | cast_expression: |
---|
688 | unary_expression |
---|
689 | | '(' type_no_function ')' cast_expression |
---|
690 | { $$ = new ExpressionNode( build_cast( $2, $4 ) ); } |
---|
691 | | '(' COROUTINE '&' ')' cast_expression // CFA |
---|
692 | { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Coroutine, $5 ) ); } |
---|
693 | | '(' THREAD '&' ')' cast_expression // CFA |
---|
694 | { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Thread, $5 ) ); } |
---|
695 | | '(' MONITOR '&' ')' cast_expression // CFA |
---|
696 | { $$ = new ExpressionNode( build_keyword_cast( KeywordCastExpr::Monitor, $5 ) ); } |
---|
697 | // VIRTUAL cannot be opt because of look ahead issues |
---|
698 | | '(' VIRTUAL ')' cast_expression // CFA |
---|
699 | { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $4 ), maybeMoveBuildType( nullptr ) ) ); } |
---|
700 | | '(' VIRTUAL type_no_function ')' cast_expression // CFA |
---|
701 | { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $5 ), maybeMoveBuildType( $3 ) ) ); } |
---|
702 | // | '(' type_no_function ')' tuple |
---|
703 | // { $$ = new ExpressionNode( build_cast( $2, $4 ) ); } |
---|
704 | ; |
---|
705 | |
---|
706 | exponential_expression: |
---|
707 | cast_expression |
---|
708 | | exponential_expression '\\' cast_expression |
---|
709 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); } |
---|
710 | ; |
---|
711 | |
---|
712 | multiplicative_expression: |
---|
713 | exponential_expression |
---|
714 | | multiplicative_expression '*' exponential_expression |
---|
715 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); } |
---|
716 | | multiplicative_expression '/' exponential_expression |
---|
717 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); } |
---|
718 | | multiplicative_expression '%' exponential_expression |
---|
719 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); } |
---|
720 | ; |
---|
721 | |
---|
722 | additive_expression: |
---|
723 | multiplicative_expression |
---|
724 | | additive_expression '+' multiplicative_expression |
---|
725 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); } |
---|
726 | | additive_expression '-' multiplicative_expression |
---|
727 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); } |
---|
728 | ; |
---|
729 | |
---|
730 | shift_expression: |
---|
731 | additive_expression |
---|
732 | | shift_expression LS additive_expression |
---|
733 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); } |
---|
734 | | shift_expression RS additive_expression |
---|
735 | { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); } |
---|
736 | ; |
---|
737 | |
---|
738 | relational_expression: |
---|
739 | shift_expression |
---|
740 | | relational_expression '<' shift_expression |
---|
741 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); } |
---|
742 | | relational_expression '>' shift_expression |
---|
743 | { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); } |
---|
744 | | relational_expression LE shift_expression |
---|
745 | { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); } |
---|
746 | | relational_expression GE shift_expression |
---|
747 | { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); } |
---|
748 | ; |
---|
749 | |
---|
750 | equality_expression: |
---|
751 | relational_expression |
---|
752 | | equality_expression EQ relational_expression |
---|
753 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); } |
---|
754 | | equality_expression NE relational_expression |
---|
755 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); } |
---|
756 | ; |
---|
757 | |
---|
758 | AND_expression: |
---|
759 | equality_expression |
---|
760 | | AND_expression '&' equality_expression |
---|
761 | { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); } |
---|
762 | ; |
---|
763 | |
---|
764 | exclusive_OR_expression: |
---|
765 | AND_expression |
---|
766 | | exclusive_OR_expression '^' AND_expression |
---|
767 | { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); } |
---|
768 | ; |
---|
769 | |
---|
770 | inclusive_OR_expression: |
---|
771 | exclusive_OR_expression |
---|
772 | | inclusive_OR_expression '|' exclusive_OR_expression |
---|
773 | { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); } |
---|
774 | ; |
---|
775 | |
---|
776 | logical_AND_expression: |
---|
777 | inclusive_OR_expression |
---|
778 | | logical_AND_expression ANDAND inclusive_OR_expression |
---|
779 | { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); } |
---|
780 | ; |
---|
781 | |
---|
782 | logical_OR_expression: |
---|
783 | logical_AND_expression |
---|
784 | | logical_OR_expression OROR logical_AND_expression |
---|
785 | { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); } |
---|
786 | ; |
---|
787 | |
---|
788 | conditional_expression: |
---|
789 | logical_OR_expression |
---|
790 | | logical_OR_expression '?' comma_expression ':' conditional_expression |
---|
791 | { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); } |
---|
792 | // FIX ME: computes $1 twice |
---|
793 | | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand |
---|
794 | { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); } |
---|
795 | ; |
---|
796 | |
---|
797 | constant_expression: |
---|
798 | conditional_expression |
---|
799 | ; |
---|
800 | |
---|
801 | assignment_expression: |
---|
802 | // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples |
---|
803 | conditional_expression |
---|
804 | | unary_expression assignment_operator assignment_expression |
---|
805 | { $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); } |
---|
806 | | unary_expression '=' '{' initializer_list_opt comma_opt '}' |
---|
807 | { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; } |
---|
808 | ; |
---|
809 | |
---|
810 | assignment_expression_opt: |
---|
811 | // empty |
---|
812 | { $$ = nullptr; } |
---|
813 | | assignment_expression |
---|
814 | ; |
---|
815 | |
---|
816 | assignment_operator: |
---|
817 | '=' { $$ = OperKinds::Assign; } |
---|
818 | | ATassign { $$ = OperKinds::AtAssn; } |
---|
819 | | EXPassign { $$ = OperKinds::ExpAssn; } |
---|
820 | | MULTassign { $$ = OperKinds::MulAssn; } |
---|
821 | | DIVassign { $$ = OperKinds::DivAssn; } |
---|
822 | | MODassign { $$ = OperKinds::ModAssn; } |
---|
823 | | PLUSassign { $$ = OperKinds::PlusAssn; } |
---|
824 | | MINUSassign { $$ = OperKinds::MinusAssn; } |
---|
825 | | LSassign { $$ = OperKinds::LSAssn; } |
---|
826 | | RSassign { $$ = OperKinds::RSAssn; } |
---|
827 | | ANDassign { $$ = OperKinds::AndAssn; } |
---|
828 | | ERassign { $$ = OperKinds::ERAssn; } |
---|
829 | | ORassign { $$ = OperKinds::OrAssn; } |
---|
830 | ; |
---|
831 | |
---|
832 | tuple: // CFA, tuple |
---|
833 | // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with |
---|
834 | // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array |
---|
835 | // '[' ']' |
---|
836 | // { $$ = new ExpressionNode( build_tuple() ); } |
---|
837 | // '[' push assignment_expression pop ']' |
---|
838 | // { $$ = new ExpressionNode( build_tuple( $3 ) ); } |
---|
839 | '[' push ',' tuple_expression_list pop ']' |
---|
840 | { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); } |
---|
841 | | '[' push assignment_expression ',' tuple_expression_list pop ']' |
---|
842 | { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); } |
---|
843 | ; |
---|
844 | |
---|
845 | tuple_expression_list: |
---|
846 | assignment_expression_opt |
---|
847 | | tuple_expression_list ',' assignment_expression_opt |
---|
848 | { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
---|
849 | ; |
---|
850 | |
---|
851 | comma_expression: |
---|
852 | assignment_expression |
---|
853 | | comma_expression ',' assignment_expression |
---|
854 | { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
---|
855 | ; |
---|
856 | |
---|
857 | comma_expression_opt: |
---|
858 | // empty |
---|
859 | { $$ = nullptr; } |
---|
860 | | comma_expression |
---|
861 | ; |
---|
862 | |
---|
863 | //*************************** STATEMENTS ******************************* |
---|
864 | |
---|
865 | statement: |
---|
866 | labeled_statement |
---|
867 | | compound_statement |
---|
868 | | expression_statement |
---|
869 | | selection_statement |
---|
870 | | iteration_statement |
---|
871 | | jump_statement |
---|
872 | | with_statement |
---|
873 | | mutex_statement |
---|
874 | | waitfor_statement |
---|
875 | | exception_statement |
---|
876 | | enable_disable_statement |
---|
877 | { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; } |
---|
878 | | asm_statement |
---|
879 | | DIRECTIVE |
---|
880 | { $$ = new StatementNode( build_directive( $1 ) ); } |
---|
881 | ; |
---|
882 | |
---|
883 | labeled_statement: |
---|
884 | // labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER |
---|
885 | identifier_or_type_name ':' attribute_list_opt statement |
---|
886 | { |
---|
887 | $$ = $4->add_label( $1, $3 ); |
---|
888 | } |
---|
889 | ; |
---|
890 | |
---|
891 | compound_statement: |
---|
892 | '{' '}' |
---|
893 | { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); } |
---|
894 | | '{' |
---|
895 | // Two scopes are necessary because the block itself has a scope, but every declaration within the block also |
---|
896 | // requires its own scope. |
---|
897 | push push |
---|
898 | local_label_declaration_opt // GCC, local labels |
---|
899 | statement_decl_list // C99, intermix declarations and statements |
---|
900 | pop '}' |
---|
901 | { $$ = new StatementNode( build_compound( $5 ) ); } |
---|
902 | ; |
---|
903 | |
---|
904 | statement_decl_list: // C99 |
---|
905 | statement_decl |
---|
906 | | statement_decl_list push statement_decl |
---|
907 | { if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } } |
---|
908 | ; |
---|
909 | |
---|
910 | statement_decl: |
---|
911 | declaration // CFA, new & old style declarations |
---|
912 | { $$ = new StatementNode( $1 ); } |
---|
913 | | EXTENSION declaration // GCC |
---|
914 | { |
---|
915 | distExt( $2 ); |
---|
916 | $$ = new StatementNode( $2 ); |
---|
917 | } |
---|
918 | | function_definition |
---|
919 | { $$ = new StatementNode( $1 ); } |
---|
920 | | EXTENSION function_definition // GCC |
---|
921 | { |
---|
922 | distExt( $2 ); |
---|
923 | $$ = new StatementNode( $2 ); |
---|
924 | } |
---|
925 | | statement pop |
---|
926 | ; |
---|
927 | |
---|
928 | statement_list_nodecl: |
---|
929 | statement |
---|
930 | | statement_list_nodecl statement |
---|
931 | { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } } |
---|
932 | ; |
---|
933 | |
---|
934 | expression_statement: |
---|
935 | comma_expression_opt ';' |
---|
936 | { $$ = new StatementNode( build_expr( $1 ) ); } |
---|
937 | ; |
---|
938 | |
---|
939 | selection_statement: |
---|
940 | IF '(' push if_control_expression ')' statement %prec THEN |
---|
941 | // explicitly deal with the shift/reduce conflict on if/else |
---|
942 | { $$ = new StatementNode( build_if( $4, $6, nullptr ) ); } |
---|
943 | | IF '(' push if_control_expression ')' statement ELSE statement |
---|
944 | { $$ = new StatementNode( build_if( $4, $6, $8 ) ); } |
---|
945 | | SWITCH '(' comma_expression ')' case_clause |
---|
946 | { $$ = new StatementNode( build_switch( true, $3, $5 ) ); } |
---|
947 | | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA |
---|
948 | { |
---|
949 | StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) ); |
---|
950 | // The semantics of the declaration list is changed to include associated initialization, which is performed |
---|
951 | // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound |
---|
952 | // statement around the switch. Statements after the initial declaration list can never be executed, and |
---|
953 | // therefore, are removed from the grammar even though C allows it. The change also applies to choose |
---|
954 | // statement. |
---|
955 | $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw; |
---|
956 | } |
---|
957 | | CHOOSE '(' comma_expression ')' case_clause // CFA |
---|
958 | { $$ = new StatementNode( build_switch( false, $3, $5 ) ); } |
---|
959 | | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA |
---|
960 | { |
---|
961 | StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) ); |
---|
962 | $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw; |
---|
963 | } |
---|
964 | ; |
---|
965 | |
---|
966 | if_control_expression: |
---|
967 | comma_expression pop |
---|
968 | { $$ = new IfCtl( nullptr, $1 ); } |
---|
969 | | c_declaration pop // no semi-colon |
---|
970 | { $$ = new IfCtl( $1, nullptr ); } |
---|
971 | | cfa_declaration pop // no semi-colon |
---|
972 | { $$ = new IfCtl( $1, nullptr ); } |
---|
973 | | declaration comma_expression // semi-colon separated |
---|
974 | { $$ = new IfCtl( $1, $2 ); } |
---|
975 | ; |
---|
976 | |
---|
977 | // CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case |
---|
978 | // clause allows a list of values and subranges. |
---|
979 | |
---|
980 | case_value: // CFA |
---|
981 | constant_expression { $$ = $1; } |
---|
982 | | constant_expression ELLIPSIS constant_expression // GCC, subrange |
---|
983 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
---|
984 | | subrange // CFA, subrange |
---|
985 | ; |
---|
986 | |
---|
987 | case_value_list: // CFA |
---|
988 | case_value { $$ = new StatementNode( build_case( $1 ) ); } |
---|
989 | // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5" |
---|
990 | | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); } |
---|
991 | ; |
---|
992 | |
---|
993 | case_label: // CFA |
---|
994 | CASE case_value_list ':' { $$ = $2; } |
---|
995 | | DEFAULT ':' { $$ = new StatementNode( build_default() ); } |
---|
996 | // A semantic check is required to ensure only one default clause per switch/choose statement. |
---|
997 | ; |
---|
998 | |
---|
999 | //label_list_opt: |
---|
1000 | // // empty |
---|
1001 | // | identifier_or_type_name ':' |
---|
1002 | // | label_list_opt identifier_or_type_name ':' |
---|
1003 | // ; |
---|
1004 | |
---|
1005 | case_label_list: // CFA |
---|
1006 | case_label |
---|
1007 | | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); } |
---|
1008 | ; |
---|
1009 | |
---|
1010 | case_clause: // CFA |
---|
1011 | case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); } |
---|
1012 | ; |
---|
1013 | |
---|
1014 | switch_clause_list_opt: // CFA |
---|
1015 | // empty |
---|
1016 | { $$ = nullptr; } |
---|
1017 | | switch_clause_list |
---|
1018 | ; |
---|
1019 | |
---|
1020 | switch_clause_list: // CFA |
---|
1021 | case_label_list statement_list_nodecl |
---|
1022 | { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); } |
---|
1023 | | switch_clause_list case_label_list statement_list_nodecl |
---|
1024 | { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); } |
---|
1025 | ; |
---|
1026 | |
---|
1027 | iteration_statement: |
---|
1028 | WHILE '(' comma_expression ')' statement |
---|
1029 | { $$ = new StatementNode( build_while( $3, $5 ) ); } |
---|
1030 | | DO statement WHILE '(' comma_expression ')' ';' |
---|
1031 | { $$ = new StatementNode( build_while( $5, $2, true ) ); } |
---|
1032 | | FOR '(' push for_control_expression ')' statement |
---|
1033 | { $$ = new StatementNode( build_for( $4, $6 ) ); } |
---|
1034 | ; |
---|
1035 | |
---|
1036 | for_control_expression: |
---|
1037 | comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt |
---|
1038 | { $$ = new ForCtl( $1, $4, $6 ); } |
---|
1039 | | declaration comma_expression_opt ';' comma_expression_opt // C99 |
---|
1040 | { $$ = new ForCtl( $1, $2, $4 ); } |
---|
1041 | ; |
---|
1042 | |
---|
1043 | jump_statement: |
---|
1044 | GOTO identifier_or_type_name ';' |
---|
1045 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); } |
---|
1046 | | GOTO '*' comma_expression ';' // GCC, computed goto |
---|
1047 | // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3); |
---|
1048 | // whereas normal operator precedence yields goto (*i)+3; |
---|
1049 | { $$ = new StatementNode( build_computedgoto( $3 ) ); } |
---|
1050 | // A semantic check is required to ensure fallthru appears only in the body of a choose statement. |
---|
1051 | | fall_through_name ';' // CFA |
---|
1052 | { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); } |
---|
1053 | | fall_through_name identifier_or_type_name ';' // CFA |
---|
1054 | { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); } |
---|
1055 | | fall_through_name DEFAULT ';' // CFA |
---|
1056 | { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); } |
---|
1057 | | CONTINUE ';' |
---|
1058 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement. |
---|
1059 | { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); } |
---|
1060 | | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue |
---|
1061 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and |
---|
1062 | // the target of the transfer appears only at the start of an iteration statement. |
---|
1063 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); } |
---|
1064 | | BREAK ';' |
---|
1065 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement. |
---|
1066 | { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } |
---|
1067 | | BREAK identifier_or_type_name ';' // CFA, multi-level exit |
---|
1068 | // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and |
---|
1069 | // the target of the transfer appears only at the start of an iteration statement. |
---|
1070 | { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); } |
---|
1071 | | RETURN comma_expression_opt ';' |
---|
1072 | { $$ = new StatementNode( build_return( $2 ) ); } |
---|
1073 | | RETURN '{' initializer_list_opt comma_opt '}' |
---|
1074 | { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; } |
---|
1075 | | THROW assignment_expression_opt ';' // handles rethrow |
---|
1076 | { $$ = new StatementNode( build_throw( $2 ) ); } |
---|
1077 | | THROWRESUME assignment_expression_opt ';' // handles reresume |
---|
1078 | { $$ = new StatementNode( build_resume( $2 ) ); } |
---|
1079 | | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume |
---|
1080 | { $$ = new StatementNode( build_resume_at( $2, $4 ) ); } |
---|
1081 | ; |
---|
1082 | |
---|
1083 | fall_through_name: // CFA |
---|
1084 | FALLTHRU |
---|
1085 | | FALLTHROUGH |
---|
1086 | ; |
---|
1087 | |
---|
1088 | with_statement: |
---|
1089 | WITH '(' tuple_expression_list ')' statement |
---|
1090 | { |
---|
1091 | $$ = new StatementNode( build_with( $3, $5 ) ); |
---|
1092 | } |
---|
1093 | ; |
---|
1094 | |
---|
1095 | // If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex". |
---|
1096 | mutex_statement: |
---|
1097 | MUTEX '(' argument_expression_list ')' statement |
---|
1098 | { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; } |
---|
1099 | ; |
---|
1100 | |
---|
1101 | when_clause: |
---|
1102 | WHEN '(' comma_expression ')' { $$ = $3; } |
---|
1103 | ; |
---|
1104 | |
---|
1105 | when_clause_opt: |
---|
1106 | // empty |
---|
1107 | { $$ = nullptr; } |
---|
1108 | | when_clause |
---|
1109 | ; |
---|
1110 | |
---|
1111 | waitfor: |
---|
1112 | WAITFOR '(' identifier ')' |
---|
1113 | { |
---|
1114 | $$ = new ExpressionNode( new NameExpr( *$3 ) ); |
---|
1115 | delete $3; |
---|
1116 | } |
---|
1117 | | WAITFOR '(' identifier ',' argument_expression_list ')' |
---|
1118 | { |
---|
1119 | $$ = new ExpressionNode( new NameExpr( *$3 ) ); |
---|
1120 | $$->set_last( $5 ); |
---|
1121 | delete $3; |
---|
1122 | } |
---|
1123 | ; |
---|
1124 | |
---|
1125 | timeout: |
---|
1126 | TIMEOUT '(' comma_expression ')' { $$ = $3; } |
---|
1127 | ; |
---|
1128 | |
---|
1129 | waitfor_clause: |
---|
1130 | when_clause_opt waitfor statement %prec THEN |
---|
1131 | { $$ = build_waitfor( $2, $3, $1 ); } |
---|
1132 | | when_clause_opt waitfor statement WOR waitfor_clause |
---|
1133 | { $$ = build_waitfor( $2, $3, $1, $5 ); } |
---|
1134 | | when_clause_opt timeout statement %prec THEN |
---|
1135 | { $$ = build_waitfor_timeout( $2, $3, $1 ); } |
---|
1136 | | when_clause_opt ELSE statement |
---|
1137 | { $$ = build_waitfor_timeout( nullptr, $3, $1 ); } |
---|
1138 | // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless) |
---|
1139 | | when_clause_opt timeout statement WOR when_clause ELSE statement |
---|
1140 | { $$ = build_waitfor_timeout( $2, $3, $1, $7, $5 ); } |
---|
1141 | ; |
---|
1142 | |
---|
1143 | waitfor_statement: |
---|
1144 | when_clause_opt waitfor statement %prec THEN |
---|
1145 | { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); } |
---|
1146 | | when_clause_opt waitfor statement WOR waitfor_clause |
---|
1147 | { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); } |
---|
1148 | ; |
---|
1149 | |
---|
1150 | exception_statement: |
---|
1151 | TRY compound_statement handler_clause |
---|
1152 | { $$ = new StatementNode( build_try( $2, $3, 0 ) ); } |
---|
1153 | | TRY compound_statement finally_clause |
---|
1154 | { $$ = new StatementNode( build_try( $2, 0, $3 ) ); } |
---|
1155 | | TRY compound_statement handler_clause finally_clause |
---|
1156 | { $$ = new StatementNode( build_try( $2, $3, $4 ) ); } |
---|
1157 | ; |
---|
1158 | |
---|
1159 | handler_clause: |
---|
1160 | handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop |
---|
1161 | { $$ = new StatementNode( build_catch( $1, $5, $7, $9 ) ); } |
---|
1162 | | handler_clause handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop |
---|
1163 | { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, $8, $10 ) ) ); } |
---|
1164 | ; |
---|
1165 | |
---|
1166 | handler_predicate_opt: |
---|
1167 | // empty |
---|
1168 | { $$ = nullptr; } |
---|
1169 | | ';' conditional_expression { $$ = $2; } |
---|
1170 | ; |
---|
1171 | |
---|
1172 | handler_key: |
---|
1173 | CATCH { $$ = CatchStmt::Terminate; } |
---|
1174 | | CATCHRESUME { $$ = CatchStmt::Resume; } |
---|
1175 | ; |
---|
1176 | |
---|
1177 | finally_clause: |
---|
1178 | FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); } |
---|
1179 | ; |
---|
1180 | |
---|
1181 | exception_declaration: |
---|
1182 | // No SUE declaration in parameter list. |
---|
1183 | type_specifier_nobody |
---|
1184 | | type_specifier_nobody declarator |
---|
1185 | { $$ = $2->addType( $1 ); } |
---|
1186 | | type_specifier_nobody variable_abstract_declarator |
---|
1187 | { $$ = $2->addType( $1 ); } |
---|
1188 | | cfa_abstract_declarator_tuple no_attr_identifier // CFA |
---|
1189 | { $$ = $1->addName( $2 ); } |
---|
1190 | | cfa_abstract_declarator_tuple // CFA |
---|
1191 | ; |
---|
1192 | |
---|
1193 | enable_disable_statement: |
---|
1194 | enable_disable_key identifier_list compound_statement |
---|
1195 | ; |
---|
1196 | |
---|
1197 | enable_disable_key: |
---|
1198 | ENABLE |
---|
1199 | | DISABLE |
---|
1200 | ; |
---|
1201 | |
---|
1202 | asm_statement: |
---|
1203 | ASM asm_volatile_opt '(' string_literal ')' ';' |
---|
1204 | { $$ = new StatementNode( build_asm( $2, $4, 0 ) ); } |
---|
1205 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC |
---|
1206 | { $$ = new StatementNode( build_asm( $2, $4, $6 ) ); } |
---|
1207 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';' |
---|
1208 | { $$ = new StatementNode( build_asm( $2, $4, $6, $8 ) ); } |
---|
1209 | | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';' |
---|
1210 | { $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); } |
---|
1211 | | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';' |
---|
1212 | { $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); } |
---|
1213 | ; |
---|
1214 | |
---|
1215 | asm_volatile_opt: // GCC |
---|
1216 | // empty |
---|
1217 | { $$ = false; } |
---|
1218 | | VOLATILE |
---|
1219 | { $$ = true; } |
---|
1220 | ; |
---|
1221 | |
---|
1222 | asm_operands_opt: // GCC |
---|
1223 | // empty |
---|
1224 | { $$ = nullptr; } // use default argument |
---|
1225 | | asm_operands_list |
---|
1226 | ; |
---|
1227 | |
---|
1228 | asm_operands_list: // GCC |
---|
1229 | asm_operand |
---|
1230 | | asm_operands_list ',' asm_operand |
---|
1231 | { $$ = (ExpressionNode *)$1->set_last( $3 ); } |
---|
1232 | ; |
---|
1233 | |
---|
1234 | asm_operand: // GCC |
---|
1235 | string_literal '(' constant_expression ')' |
---|
1236 | { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ), $1, maybeMoveBuild< Expression >( $3 ) ) ); } |
---|
1237 | | '[' constant_expression ']' string_literal '(' constant_expression ')' |
---|
1238 | { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( $2 ), $4, maybeMoveBuild< Expression >( $6 ) ) ); } |
---|
1239 | ; |
---|
1240 | |
---|
1241 | asm_clobbers_list_opt: // GCC |
---|
1242 | // empty |
---|
1243 | { $$ = nullptr; } // use default argument |
---|
1244 | | string_literal |
---|
1245 | { $$ = new ExpressionNode( $1 ); } |
---|
1246 | | asm_clobbers_list_opt ',' string_literal |
---|
1247 | // set_last returns ParseNode * |
---|
1248 | { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); } |
---|
1249 | ; |
---|
1250 | |
---|
1251 | label_list: |
---|
1252 | no_attr_identifier |
---|
1253 | { |
---|
1254 | $$ = new LabelNode(); $$->labels.push_back( *$1 ); |
---|
1255 | delete $1; // allocated by lexer |
---|
1256 | } |
---|
1257 | | label_list ',' no_attr_identifier |
---|
1258 | { |
---|
1259 | $$ = $1; $1->labels.push_back( *$3 ); |
---|
1260 | delete $3; // allocated by lexer |
---|
1261 | } |
---|
1262 | ; |
---|
1263 | |
---|
1264 | //******************************* DECLARATIONS ********************************* |
---|
1265 | |
---|
1266 | declaration_list_opt: // used at beginning of switch statement |
---|
1267 | pop |
---|
1268 | { $$ = nullptr; } |
---|
1269 | | declaration_list |
---|
1270 | ; |
---|
1271 | |
---|
1272 | declaration_list: |
---|
1273 | declaration |
---|
1274 | | declaration_list push declaration |
---|
1275 | { $$ = $1->appendList( $3 ); } |
---|
1276 | ; |
---|
1277 | |
---|
1278 | KR_declaration_list_opt: // used to declare parameter types in K&R style functions |
---|
1279 | // empty |
---|
1280 | { $$ = nullptr; } |
---|
1281 | | KR_declaration_list |
---|
1282 | ; |
---|
1283 | |
---|
1284 | KR_declaration_list: |
---|
1285 | push c_declaration pop ';' |
---|
1286 | { $$ = $2; } |
---|
1287 | | KR_declaration_list push c_declaration pop ';' |
---|
1288 | { $$ = $1->appendList( $3 ); } |
---|
1289 | ; |
---|
1290 | |
---|
1291 | local_label_declaration_opt: // GCC, local label |
---|
1292 | // empty |
---|
1293 | | local_label_declaration_list |
---|
1294 | ; |
---|
1295 | |
---|
1296 | local_label_declaration_list: // GCC, local label |
---|
1297 | LABEL local_label_list ';' |
---|
1298 | | local_label_declaration_list LABEL local_label_list ';' |
---|
1299 | ; |
---|
1300 | |
---|
1301 | local_label_list: // GCC, local label |
---|
1302 | no_attr_identifier_or_type_name |
---|
1303 | | local_label_list ',' no_attr_identifier_or_type_name |
---|
1304 | ; |
---|
1305 | |
---|
1306 | declaration: // old & new style declarations |
---|
1307 | c_declaration pop ';' |
---|
1308 | | cfa_declaration pop ';' // CFA |
---|
1309 | | static_assert |
---|
1310 | ; |
---|
1311 | |
---|
1312 | static_assert: |
---|
1313 | STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11 |
---|
1314 | { $$ = DeclarationNode::newStaticAssert( $3, $5 ); } |
---|
1315 | |
---|
1316 | // C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function |
---|
1317 | // declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to |
---|
1318 | // the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration |
---|
1319 | // modifiers are interpreted from left to right and the entire type specification is distributed across all variables in |
---|
1320 | // the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program |
---|
1321 | // block, but cannot be mixed within a specific declaration. |
---|
1322 | // |
---|
1323 | // CFA C |
---|
1324 | // [10] int x; int x[10]; // array of 10 integers |
---|
1325 | // [10] * char y; char *y[10]; // array of 10 pointers to char |
---|
1326 | |
---|
1327 | cfa_declaration: // CFA |
---|
1328 | cfa_variable_declaration |
---|
1329 | | cfa_typedef_declaration |
---|
1330 | | cfa_function_declaration |
---|
1331 | | type_declaring_list |
---|
1332 | | trait_specifier |
---|
1333 | ; |
---|
1334 | |
---|
1335 | cfa_variable_declaration: // CFA |
---|
1336 | cfa_variable_specifier initializer_opt |
---|
1337 | { $$ = $1->addInitializer( $2 ); } |
---|
1338 | | declaration_qualifier_list cfa_variable_specifier initializer_opt |
---|
1339 | // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude |
---|
1340 | // them as a type_qualifier cannot appear in that context. |
---|
1341 | { $$ = $2->addQualifiers( $1 )->addInitializer( $3 ); } |
---|
1342 | | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt |
---|
1343 | { $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) ); } |
---|
1344 | ; |
---|
1345 | |
---|
1346 | cfa_variable_specifier: // CFA |
---|
1347 | // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
---|
1348 | // storage-class |
---|
1349 | cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt |
---|
1350 | { $$ = $1->addName( $2 )->addAsmName( $3 ); } |
---|
1351 | | cfa_abstract_tuple identifier_or_type_name asm_name_opt |
---|
1352 | { $$ = $1->addName( $2 )->addAsmName( $3 ); } |
---|
1353 | | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt |
---|
1354 | { $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 ); } |
---|
1355 | ; |
---|
1356 | |
---|
1357 | cfa_function_declaration: // CFA |
---|
1358 | cfa_function_specifier |
---|
1359 | { $$ = $1; } |
---|
1360 | | type_qualifier_list cfa_function_specifier |
---|
1361 | { $$ = $2->addQualifiers( $1 ); } |
---|
1362 | | declaration_qualifier_list cfa_function_specifier |
---|
1363 | { $$ = $2->addQualifiers( $1 ); } |
---|
1364 | | declaration_qualifier_list type_qualifier_list cfa_function_specifier |
---|
1365 | { $$ = $3->addQualifiers( $1 )->addQualifiers( $2 ); } |
---|
1366 | | cfa_function_declaration ',' identifier_or_type_name '(' cfa_parameter_type_list_opt ')' |
---|
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 | $$ = $1->appendList( DeclarationNode::newFunction( $3, ret, $5, nullptr ) ); |
---|
1372 | } |
---|
1373 | ; |
---|
1374 | |
---|
1375 | cfa_function_specifier: // CFA |
---|
1376 | // '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict |
---|
1377 | // { |
---|
1378 | // $$ = 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 | { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 ); } |
---|
1401 | | cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' |
---|
1402 | { $$ = DeclarationNode::newFunction( $2, $1, $5, 0 ); } |
---|
1403 | ; |
---|
1404 | |
---|
1405 | cfa_function_return: // CFA |
---|
1406 | '[' push cfa_parameter_list pop ']' |
---|
1407 | { $$ = DeclarationNode::newTuple( $3 ); } |
---|
1408 | | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']' |
---|
1409 | // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the |
---|
1410 | // ']'. |
---|
1411 | { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); } |
---|
1412 | ; |
---|
1413 | |
---|
1414 | cfa_typedef_declaration: // CFA |
---|
1415 | TYPEDEF cfa_variable_specifier |
---|
1416 | { |
---|
1417 | typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname ); |
---|
1418 | $$ = $2->addTypedef(); |
---|
1419 | } |
---|
1420 | | TYPEDEF cfa_function_specifier |
---|
1421 | { |
---|
1422 | typedefTable.addToEnclosingScope( *$2->name, TYPEDEFname ); |
---|
1423 | $$ = $2->addTypedef(); |
---|
1424 | } |
---|
1425 | | cfa_typedef_declaration pop ',' push no_attr_identifier |
---|
1426 | { |
---|
1427 | typedefTable.addToEnclosingScope( *$5, TYPEDEFname ); |
---|
1428 | $$ = $1->appendList( $1->cloneType( $5 ) ); |
---|
1429 | } |
---|
1430 | ; |
---|
1431 | |
---|
1432 | // Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as |
---|
1433 | // a separate form of declaration, which syntactically precludes storage-class specifiers and initialization. |
---|
1434 | |
---|
1435 | typedef_declaration: |
---|
1436 | TYPEDEF type_specifier declarator |
---|
1437 | { |
---|
1438 | typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname ); |
---|
1439 | $$ = $3->addType( $2 )->addTypedef(); |
---|
1440 | } |
---|
1441 | | typedef_declaration pop ',' push declarator |
---|
1442 | { |
---|
1443 | typedefTable.addToEnclosingScope( *$5->name, TYPEDEFname ); |
---|
1444 | $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() ); |
---|
1445 | } |
---|
1446 | | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 ) |
---|
1447 | { |
---|
1448 | typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname ); |
---|
1449 | $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef(); |
---|
1450 | } |
---|
1451 | | type_specifier TYPEDEF declarator |
---|
1452 | { |
---|
1453 | typedefTable.addToEnclosingScope( *$3->name, TYPEDEFname ); |
---|
1454 | $$ = $3->addType( $1 )->addTypedef(); |
---|
1455 | } |
---|
1456 | | type_specifier TYPEDEF type_qualifier_list declarator |
---|
1457 | { |
---|
1458 | typedefTable.addToEnclosingScope( *$4->name, TYPEDEFname ); |
---|
1459 | $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 ); |
---|
1460 | } |
---|
1461 | ; |
---|
1462 | |
---|
1463 | typedef_expression: |
---|
1464 | // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression |
---|
1465 | TYPEDEF no_attr_identifier '=' assignment_expression |
---|
1466 | { |
---|
1467 | // $$ = DeclarationNode::newName( 0 ); // unimplemented |
---|
1468 | SemanticError( yylloc, "Typedef expression is currently unimplemented." ); $$ = nullptr; |
---|
1469 | } |
---|
1470 | | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression |
---|
1471 | { |
---|
1472 | // $$ = DeclarationNode::newName( 0 ); // unimplemented |
---|
1473 | SemanticError( yylloc, "Typedef expression is currently unimplemented." ); $$ = nullptr; |
---|
1474 | } |
---|
1475 | ; |
---|
1476 | |
---|
1477 | //c_declaration: |
---|
1478 | // declaring_list pop ';' |
---|
1479 | // | typedef_declaration pop ';' |
---|
1480 | // | typedef_expression pop ';' // GCC, naming expression type |
---|
1481 | // | sue_declaration_specifier pop ';' |
---|
1482 | // ; |
---|
1483 | // |
---|
1484 | //declaring_list: |
---|
1485 | // // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
---|
1486 | // // storage-class |
---|
1487 | // declarator asm_name_opt initializer_opt |
---|
1488 | // { |
---|
1489 | // typedefTable.addToEnclosingScope( IDENTIFIER ); |
---|
1490 | // $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 ); |
---|
1491 | // } |
---|
1492 | // | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt |
---|
1493 | // { |
---|
1494 | // typedefTable.addToEnclosingScope( IDENTIFIER ); |
---|
1495 | // $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) ); |
---|
1496 | // } |
---|
1497 | // ; |
---|
1498 | |
---|
1499 | c_declaration: |
---|
1500 | declaration_specifier declaring_list |
---|
1501 | { $$ = distAttr( $1, $2 ); } |
---|
1502 | | typedef_declaration |
---|
1503 | | typedef_expression // GCC, naming expression type |
---|
1504 | | sue_declaration_specifier |
---|
1505 | ; |
---|
1506 | |
---|
1507 | declaring_list: |
---|
1508 | // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static |
---|
1509 | // storage-class |
---|
1510 | declarator asm_name_opt initializer_opt |
---|
1511 | { $$ = $1->addAsmName( $2 )->addInitializer( $3 ); } |
---|
1512 | | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt |
---|
1513 | { $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) ); } |
---|
1514 | ; |
---|
1515 | |
---|
1516 | declaration_specifier: // type specifier + storage class |
---|
1517 | basic_declaration_specifier |
---|
1518 | | sue_declaration_specifier |
---|
1519 | | type_declaration_specifier |
---|
1520 | ; |
---|
1521 | |
---|
1522 | declaration_specifier_nobody: // type specifier + storage class - {...} |
---|
1523 | // Preclude SUE declarations in restricted scopes: |
---|
1524 | // |
---|
1525 | // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... } |
---|
1526 | // |
---|
1527 | // because it is impossible to call f due to name equivalence. |
---|
1528 | basic_declaration_specifier |
---|
1529 | | sue_declaration_specifier_nobody |
---|
1530 | | type_declaration_specifier |
---|
1531 | ; |
---|
1532 | |
---|
1533 | type_specifier: // type specifier |
---|
1534 | basic_type_specifier |
---|
1535 | | sue_type_specifier |
---|
1536 | | type_type_specifier |
---|
1537 | ; |
---|
1538 | |
---|
1539 | type_specifier_nobody: // type specifier - {...} |
---|
1540 | // Preclude SUE declarations in restricted scopes: |
---|
1541 | // |
---|
1542 | // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... } |
---|
1543 | // |
---|
1544 | // because it is impossible to call f due to name equivalence. |
---|
1545 | basic_type_specifier |
---|
1546 | | sue_type_specifier_nobody |
---|
1547 | | type_type_specifier |
---|
1548 | ; |
---|
1549 | |
---|
1550 | type_qualifier_list_opt: // GCC, used in asm_statement |
---|
1551 | // empty |
---|
1552 | { $$ = nullptr; } |
---|
1553 | | type_qualifier_list |
---|
1554 | ; |
---|
1555 | |
---|
1556 | type_qualifier_list: |
---|
1557 | // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration. |
---|
1558 | // |
---|
1559 | // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same |
---|
1560 | // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it |
---|
1561 | // appeared only once. |
---|
1562 | type_qualifier |
---|
1563 | | type_qualifier_list type_qualifier |
---|
1564 | { $$ = $1->addQualifiers( $2 ); } |
---|
1565 | ; |
---|
1566 | |
---|
1567 | type_qualifier: |
---|
1568 | type_qualifier_name |
---|
1569 | | attribute |
---|
1570 | ; |
---|
1571 | |
---|
1572 | type_qualifier_name: |
---|
1573 | CONST |
---|
1574 | { $$ = DeclarationNode::newTypeQualifier( Type::Const ); } |
---|
1575 | | RESTRICT |
---|
1576 | { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); } |
---|
1577 | | VOLATILE |
---|
1578 | { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); } |
---|
1579 | | ATOMIC |
---|
1580 | { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); } |
---|
1581 | | forall |
---|
1582 | ; |
---|
1583 | |
---|
1584 | forall: |
---|
1585 | FORALL '(' push type_parameter_list pop ')' // CFA |
---|
1586 | { $$ = DeclarationNode::newForall( $4 ); } |
---|
1587 | ; |
---|
1588 | |
---|
1589 | declaration_qualifier_list: |
---|
1590 | storage_class_list |
---|
1591 | | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 ) |
---|
1592 | { $$ = $1->addQualifiers( $2 ); } |
---|
1593 | | declaration_qualifier_list type_qualifier_list storage_class_list |
---|
1594 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
---|
1595 | ; |
---|
1596 | |
---|
1597 | storage_class_list: |
---|
1598 | // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that |
---|
1599 | // only one of each is specified, except for inline, which can appear with the others. |
---|
1600 | // |
---|
1601 | // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration |
---|
1602 | // specifiers in a declaration. |
---|
1603 | storage_class |
---|
1604 | | storage_class_list storage_class |
---|
1605 | { $$ = $1->addQualifiers( $2 ); } |
---|
1606 | ; |
---|
1607 | |
---|
1608 | storage_class: |
---|
1609 | EXTERN |
---|
1610 | { $$ = DeclarationNode::newStorageClass( Type::Extern ); } |
---|
1611 | | STATIC |
---|
1612 | { $$ = DeclarationNode::newStorageClass( Type::Static ); } |
---|
1613 | | AUTO |
---|
1614 | { $$ = DeclarationNode::newStorageClass( Type::Auto ); } |
---|
1615 | | REGISTER |
---|
1616 | { $$ = DeclarationNode::newStorageClass( Type::Register ); } |
---|
1617 | | THREADLOCAL // C11 |
---|
1618 | { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); } |
---|
1619 | // Put function specifiers here to simplify parsing rules, but separate them semantically. |
---|
1620 | | INLINE // C99 |
---|
1621 | { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); } |
---|
1622 | | FORTRAN // C99 |
---|
1623 | { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); } |
---|
1624 | | NORETURN // C11 |
---|
1625 | { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); } |
---|
1626 | ; |
---|
1627 | |
---|
1628 | basic_type_name: |
---|
1629 | VOID |
---|
1630 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); } |
---|
1631 | | BOOL // C99 |
---|
1632 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); } |
---|
1633 | | CHAR |
---|
1634 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); } |
---|
1635 | | INT |
---|
1636 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); } |
---|
1637 | | INT128 |
---|
1638 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); } |
---|
1639 | | FLOAT |
---|
1640 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); } |
---|
1641 | | FLOAT80 |
---|
1642 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float80 ); } |
---|
1643 | | FLOAT128 |
---|
1644 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Float128 ); } |
---|
1645 | | DOUBLE |
---|
1646 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); } |
---|
1647 | | COMPLEX // C99 |
---|
1648 | { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); } |
---|
1649 | | IMAGINARY // C99 |
---|
1650 | { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); } |
---|
1651 | | SIGNED |
---|
1652 | { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); } |
---|
1653 | | UNSIGNED |
---|
1654 | { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); } |
---|
1655 | | SHORT |
---|
1656 | { $$ = DeclarationNode::newLength( DeclarationNode::Short ); } |
---|
1657 | | LONG |
---|
1658 | { $$ = DeclarationNode::newLength( DeclarationNode::Long ); } |
---|
1659 | | VALIST // GCC, __builtin_va_list |
---|
1660 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); } |
---|
1661 | ; |
---|
1662 | |
---|
1663 | basic_declaration_specifier: |
---|
1664 | // A semantic check is necessary for conflicting storage classes. |
---|
1665 | basic_type_specifier |
---|
1666 | | declaration_qualifier_list basic_type_specifier |
---|
1667 | { $$ = $2->addQualifiers( $1 ); } |
---|
1668 | | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
---|
1669 | { $$ = $1->addQualifiers( $2 ); } |
---|
1670 | | basic_declaration_specifier storage_class type_qualifier_list |
---|
1671 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
---|
1672 | | basic_declaration_specifier storage_class basic_type_specifier |
---|
1673 | { $$ = $3->addQualifiers( $2 )->addType( $1 ); } |
---|
1674 | ; |
---|
1675 | |
---|
1676 | basic_type_specifier: |
---|
1677 | direct_type |
---|
1678 | // Cannot have type modifiers, e.g., short, long, etc. |
---|
1679 | | type_qualifier_list_opt indirect_type type_qualifier_list_opt |
---|
1680 | { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); } |
---|
1681 | ; |
---|
1682 | |
---|
1683 | direct_type: |
---|
1684 | basic_type_name |
---|
1685 | | type_qualifier_list basic_type_name |
---|
1686 | { $$ = $2->addQualifiers( $1 ); } |
---|
1687 | | direct_type type_qualifier |
---|
1688 | { $$ = $1->addQualifiers( $2 ); } |
---|
1689 | | direct_type basic_type_name |
---|
1690 | { $$ = $1->addType( $2 ); } |
---|
1691 | ; |
---|
1692 | |
---|
1693 | indirect_type: |
---|
1694 | TYPEOF '(' type ')' // GCC: typeof(x) y; |
---|
1695 | { $$ = $3; } |
---|
1696 | | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y; |
---|
1697 | { $$ = DeclarationNode::newTypeof( $3 ); } |
---|
1698 | | ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y; |
---|
1699 | { $$ = DeclarationNode::newAttr( $1, $3 ); } |
---|
1700 | | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y; |
---|
1701 | { $$ = DeclarationNode::newAttr( $1, $3 ); } |
---|
1702 | | ZERO_T // CFA |
---|
1703 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); } |
---|
1704 | | ONE_T // CFA |
---|
1705 | { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); } |
---|
1706 | ; |
---|
1707 | |
---|
1708 | sue_declaration_specifier: // struct, union, enum + storage class + type specifier |
---|
1709 | sue_type_specifier |
---|
1710 | | declaration_qualifier_list sue_type_specifier |
---|
1711 | { $$ = $2->addQualifiers( $1 ); } |
---|
1712 | | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
---|
1713 | { $$ = $1->addQualifiers( $2 ); } |
---|
1714 | | sue_declaration_specifier storage_class type_qualifier_list |
---|
1715 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
---|
1716 | ; |
---|
1717 | |
---|
1718 | sue_type_specifier: // struct, union, enum + type specifier |
---|
1719 | elaborated_type |
---|
1720 | | type_qualifier_list |
---|
1721 | { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type |
---|
1722 | elaborated_type |
---|
1723 | { $$ = $3->addQualifiers( $1 ); } |
---|
1724 | | sue_type_specifier type_qualifier |
---|
1725 | { $$ = $1->addQualifiers( $2 ); } |
---|
1726 | ; |
---|
1727 | |
---|
1728 | sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier |
---|
1729 | sue_type_specifier_nobody |
---|
1730 | | declaration_qualifier_list sue_type_specifier_nobody |
---|
1731 | { $$ = $2->addQualifiers( $1 ); } |
---|
1732 | | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2) |
---|
1733 | { $$ = $1->addQualifiers( $2 ); } |
---|
1734 | | sue_declaration_specifier_nobody storage_class type_qualifier_list |
---|
1735 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
---|
1736 | ; |
---|
1737 | |
---|
1738 | sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier |
---|
1739 | elaborated_type_nobody |
---|
1740 | | type_qualifier_list elaborated_type_nobody |
---|
1741 | { $$ = $2->addQualifiers( $1 ); } |
---|
1742 | | sue_type_specifier_nobody type_qualifier |
---|
1743 | { $$ = $1->addQualifiers( $2 ); } |
---|
1744 | ; |
---|
1745 | |
---|
1746 | type_declaration_specifier: |
---|
1747 | type_type_specifier |
---|
1748 | | declaration_qualifier_list type_type_specifier |
---|
1749 | { $$ = $2->addQualifiers( $1 ); } |
---|
1750 | | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2) |
---|
1751 | { $$ = $1->addQualifiers( $2 ); } |
---|
1752 | | type_declaration_specifier storage_class type_qualifier_list |
---|
1753 | { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); } |
---|
1754 | ; |
---|
1755 | |
---|
1756 | type_type_specifier: // typedef types |
---|
1757 | type_name |
---|
1758 | | type_qualifier_list type_name |
---|
1759 | { $$ = $2->addQualifiers( $1 ); } |
---|
1760 | | type_type_specifier type_qualifier |
---|
1761 | { $$ = $1->addQualifiers( $2 ); } |
---|
1762 | ; |
---|
1763 | |
---|
1764 | type_name: |
---|
1765 | TYPEDEFname |
---|
1766 | { $$ = DeclarationNode::newFromTypedef( $1 ); } |
---|
1767 | | '.' TYPEDEFname |
---|
1768 | { $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME |
---|
1769 | | type_name '.' TYPEDEFname |
---|
1770 | { $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME |
---|
1771 | | typegen_name |
---|
1772 | | '.' typegen_name |
---|
1773 | { $$ = $2; } // FIX ME |
---|
1774 | | type_name '.' typegen_name |
---|
1775 | { $$ = $3; } // FIX ME |
---|
1776 | ; |
---|
1777 | |
---|
1778 | typegen_name: // CFA |
---|
1779 | TYPEGENname |
---|
1780 | { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); } |
---|
1781 | | TYPEGENname '(' ')' |
---|
1782 | { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); } |
---|
1783 | | TYPEGENname '(' type_list ')' |
---|
1784 | { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); } |
---|
1785 | ; |
---|
1786 | |
---|
1787 | elaborated_type: // struct, union, enum |
---|
1788 | aggregate_type |
---|
1789 | | enum_type |
---|
1790 | ; |
---|
1791 | |
---|
1792 | elaborated_type_nobody: // struct, union, enum - {...} |
---|
1793 | aggregate_type_nobody |
---|
1794 | | enum_type_nobody |
---|
1795 | ; |
---|
1796 | |
---|
1797 | aggregate_type: // struct, union |
---|
1798 | aggregate_key attribute_list_opt '{' field_declaration_list_opt '}' |
---|
1799 | { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); } |
---|
1800 | | aggregate_key attribute_list_opt no_attr_identifier_or_type_name |
---|
1801 | { |
---|
1802 | typedefTable.makeTypedef( *$3 ); // create typedef |
---|
1803 | if ( forall ) typedefTable.changeKind( *$3, TYPEGENname ); // possibly update |
---|
1804 | forall = false; // reset |
---|
1805 | } |
---|
1806 | '{' field_declaration_list_opt '}' |
---|
1807 | { $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); } |
---|
1808 | | aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list_opt '}' // CFA |
---|
1809 | { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); } |
---|
1810 | | aggregate_type_nobody |
---|
1811 | ; |
---|
1812 | |
---|
1813 | aggregate_type_nobody: // struct, union - {...} |
---|
1814 | aggregate_key attribute_list_opt no_attr_identifier |
---|
1815 | { |
---|
1816 | typedefTable.makeTypedef( *$3 ); |
---|
1817 | if ( forall ) typedefTable.changeKind( *$3, TYPEGENname ); // possibly update |
---|
1818 | forall = false; // reset |
---|
1819 | $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 ); |
---|
1820 | } |
---|
1821 | | aggregate_key attribute_list_opt TYPEDEFname |
---|
1822 | { |
---|
1823 | typedefTable.makeTypedef( *$3 ); |
---|
1824 | $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 ); |
---|
1825 | } |
---|
1826 | | aggregate_key attribute_list_opt typegen_name // CFA |
---|
1827 | { |
---|
1828 | // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is |
---|
1829 | // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and |
---|
1830 | // delete newFromTypeGen. |
---|
1831 | $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 ); |
---|
1832 | $3->type->symbolic.name = nullptr; |
---|
1833 | $3->type->symbolic.actuals = nullptr; |
---|
1834 | delete $3; |
---|
1835 | } |
---|
1836 | ; |
---|
1837 | |
---|
1838 | aggregate_key: |
---|
1839 | STRUCT |
---|
1840 | { $$ = DeclarationNode::Struct; } |
---|
1841 | | UNION |
---|
1842 | { $$ = DeclarationNode::Union; } |
---|
1843 | | EXCEPTION |
---|
1844 | { $$ = DeclarationNode::Exception; } |
---|
1845 | | COROUTINE |
---|
1846 | { $$ = DeclarationNode::Coroutine; } |
---|
1847 | | MONITOR |
---|
1848 | { $$ = DeclarationNode::Monitor; } |
---|
1849 | | THREAD |
---|
1850 | { $$ = DeclarationNode::Thread; } |
---|
1851 | ; |
---|
1852 | |
---|
1853 | field_declaration_list_opt: |
---|
1854 | // empty |
---|
1855 | { $$ = nullptr; } |
---|
1856 | | field_declaration_list_opt field_declaration |
---|
1857 | { $$ = $1 ? $1->appendList( $2 ) : $2; } |
---|
1858 | ; |
---|
1859 | |
---|
1860 | field_declaration: |
---|
1861 | cfa_field_declaring_list ';' // CFA, new style field declaration |
---|
1862 | | EXTENSION cfa_field_declaring_list ';' // GCC |
---|
1863 | { |
---|
1864 | distExt( $2 ); // mark all fields in list |
---|
1865 | $$ = $2; |
---|
1866 | } |
---|
1867 | | type_specifier field_declaring_list ';' |
---|
1868 | { |
---|
1869 | $$ = distAttr( $1, $2 ); } |
---|
1870 | | EXTENSION type_specifier field_declaring_list ';' // GCC |
---|
1871 | { |
---|
1872 | distExt( $3 ); // mark all fields in list |
---|
1873 | $$ = distAttr( $2, $3 ); |
---|
1874 | } |
---|
1875 | | static_assert |
---|
1876 | ; |
---|
1877 | |
---|
1878 | cfa_field_declaring_list: // CFA, new style field declaration |
---|
1879 | cfa_abstract_declarator_tuple // CFA, no field name |
---|
1880 | | cfa_abstract_declarator_tuple no_attr_identifier_or_type_name |
---|
1881 | { $$ = $1->addName( $2 ); } |
---|
1882 | | cfa_field_declaring_list ',' no_attr_identifier_or_type_name |
---|
1883 | { $$ = $1->appendList( $1->cloneType( $3 ) ); } |
---|
1884 | | cfa_field_declaring_list ',' // CFA, no field name |
---|
1885 | { $$ = $1->appendList( $1->cloneType( 0 ) ); } |
---|
1886 | ; |
---|
1887 | |
---|
1888 | field_declaring_list: |
---|
1889 | field_declarator_opt |
---|
1890 | | field_declaring_list ',' attribute_list_opt field_declarator_opt |
---|
1891 | { $$ = $1->appendList( $4->addQualifiers( $3 ) ); } |
---|
1892 | ; |
---|
1893 | |
---|
1894 | field_declarator_opt: |
---|
1895 | // empty |
---|
1896 | { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name |
---|
1897 | // '@' |
---|
1898 | // { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name |
---|
1899 | | bit_subrange_size // no field name |
---|
1900 | { $$ = DeclarationNode::newBitfield( $1 ); } |
---|
1901 | | variable_declarator bit_subrange_size_opt |
---|
1902 | // A semantic check is required to ensure bit_subrange only appears on base type int. |
---|
1903 | { $$ = $1->addBitfield( $2 ); } |
---|
1904 | | variable_type_redeclarator bit_subrange_size_opt |
---|
1905 | // A semantic check is required to ensure bit_subrange only appears on base type int. |
---|
1906 | { $$ = $1->addBitfield( $2 ); } |
---|
1907 | | variable_abstract_declarator // CFA, no field name |
---|
1908 | ; |
---|
1909 | |
---|
1910 | bit_subrange_size_opt: |
---|
1911 | // empty |
---|
1912 | { $$ = nullptr; } |
---|
1913 | | bit_subrange_size |
---|
1914 | { $$ = $1; } |
---|
1915 | ; |
---|
1916 | |
---|
1917 | bit_subrange_size: |
---|
1918 | ':' constant_expression |
---|
1919 | { $$ = $2; } |
---|
1920 | ; |
---|
1921 | |
---|
1922 | enum_type: // enum |
---|
1923 | ENUM attribute_list_opt '{' enumerator_list comma_opt '}' |
---|
1924 | { $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); } |
---|
1925 | | ENUM attribute_list_opt no_attr_identifier_or_type_name |
---|
1926 | { typedefTable.makeTypedef( *$3 ); } |
---|
1927 | '{' enumerator_list comma_opt '}' |
---|
1928 | { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); } |
---|
1929 | | enum_type_nobody |
---|
1930 | ; |
---|
1931 | |
---|
1932 | enum_type_nobody: // enum - {...} |
---|
1933 | ENUM attribute_list_opt no_attr_identifier_or_type_name |
---|
1934 | { |
---|
1935 | typedefTable.makeTypedef( *$3 ); |
---|
1936 | $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 ); |
---|
1937 | } |
---|
1938 | ; |
---|
1939 | |
---|
1940 | enumerator_list: |
---|
1941 | no_attr_identifier_or_type_name enumerator_value_opt |
---|
1942 | { $$ = DeclarationNode::newEnumConstant( $1, $2 ); } |
---|
1943 | | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt |
---|
1944 | { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); } |
---|
1945 | ; |
---|
1946 | |
---|
1947 | enumerator_value_opt: |
---|
1948 | // empty |
---|
1949 | { $$ = nullptr; } |
---|
1950 | | '=' constant_expression |
---|
1951 | { $$ = $2; } |
---|
1952 | ; |
---|
1953 | |
---|
1954 | cfa_parameter_type_list_opt: // CFA, abstract + real |
---|
1955 | // empty |
---|
1956 | { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); } |
---|
1957 | | ELLIPSIS |
---|
1958 | { $$ = nullptr; } |
---|
1959 | | cfa_abstract_parameter_list |
---|
1960 | | cfa_parameter_list |
---|
1961 | | cfa_parameter_list pop ',' push cfa_abstract_parameter_list |
---|
1962 | { $$ = $1->appendList( $5 ); } |
---|
1963 | | cfa_abstract_parameter_list pop ',' push ELLIPSIS |
---|
1964 | { $$ = $1->addVarArgs(); } |
---|
1965 | | cfa_parameter_list pop ',' push ELLIPSIS |
---|
1966 | { $$ = $1->addVarArgs(); } |
---|
1967 | ; |
---|
1968 | |
---|
1969 | cfa_parameter_list: // CFA |
---|
1970 | // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is |
---|
1971 | // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'. |
---|
1972 | cfa_parameter_declaration |
---|
1973 | | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration |
---|
1974 | { $$ = $1->appendList( $5 ); } |
---|
1975 | | cfa_parameter_list pop ',' push cfa_parameter_declaration |
---|
1976 | { $$ = $1->appendList( $5 ); } |
---|
1977 | | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration |
---|
1978 | { $$ = $1->appendList( $5 )->appendList( $9 ); } |
---|
1979 | ; |
---|
1980 | |
---|
1981 | cfa_abstract_parameter_list: // CFA, new & old style abstract |
---|
1982 | cfa_abstract_parameter_declaration |
---|
1983 | | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration |
---|
1984 | { $$ = $1->appendList( $5 ); } |
---|
1985 | ; |
---|
1986 | |
---|
1987 | parameter_type_list_opt: |
---|
1988 | // empty |
---|
1989 | { $$ = nullptr; } |
---|
1990 | | ELLIPSIS |
---|
1991 | { $$ = nullptr; } |
---|
1992 | | parameter_list |
---|
1993 | | parameter_list pop ',' push ELLIPSIS |
---|
1994 | { $$ = $1->addVarArgs(); } |
---|
1995 | ; |
---|
1996 | |
---|
1997 | parameter_list: // abstract + real |
---|
1998 | abstract_parameter_declaration |
---|
1999 | | parameter_declaration |
---|
2000 | | parameter_list pop ',' push abstract_parameter_declaration |
---|
2001 | { $$ = $1->appendList( $5 ); } |
---|
2002 | | parameter_list pop ',' push parameter_declaration |
---|
2003 | { $$ = $1->appendList( $5 ); } |
---|
2004 | ; |
---|
2005 | |
---|
2006 | // Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics |
---|
2007 | // for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes. |
---|
2008 | |
---|
2009 | cfa_parameter_declaration: // CFA, new & old style parameter declaration |
---|
2010 | parameter_declaration |
---|
2011 | | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt |
---|
2012 | { $$ = $1->addName( $2 ); } |
---|
2013 | | cfa_abstract_tuple identifier_or_type_name default_initialize_opt |
---|
2014 | // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator). |
---|
2015 | { $$ = $1->addName( $2 ); } |
---|
2016 | | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt |
---|
2017 | { $$ = $2->addName( $3 )->addQualifiers( $1 ); } |
---|
2018 | | cfa_function_specifier |
---|
2019 | ; |
---|
2020 | |
---|
2021 | cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration |
---|
2022 | abstract_parameter_declaration |
---|
2023 | | cfa_identifier_parameter_declarator_no_tuple |
---|
2024 | | cfa_abstract_tuple |
---|
2025 | // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator). |
---|
2026 | | type_qualifier_list cfa_abstract_tuple |
---|
2027 | { $$ = $2->addQualifiers( $1 ); } |
---|
2028 | | cfa_abstract_function |
---|
2029 | ; |
---|
2030 | |
---|
2031 | parameter_declaration: |
---|
2032 | // No SUE declaration in parameter list. |
---|
2033 | declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt |
---|
2034 | { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); } |
---|
2035 | | declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt |
---|
2036 | { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); } |
---|
2037 | ; |
---|
2038 | |
---|
2039 | abstract_parameter_declaration: |
---|
2040 | declaration_specifier_nobody default_initialize_opt |
---|
2041 | { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); } |
---|
2042 | | declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt |
---|
2043 | { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); } |
---|
2044 | ; |
---|
2045 | |
---|
2046 | // ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a |
---|
2047 | // parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on |
---|
2048 | // identifiers. The ANSI-style parameter-list can redefine a typedef name. |
---|
2049 | |
---|
2050 | identifier_list: // K&R-style parameter list => no types |
---|
2051 | no_attr_identifier |
---|
2052 | { $$ = DeclarationNode::newName( $1 ); } |
---|
2053 | | identifier_list ',' no_attr_identifier |
---|
2054 | { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); } |
---|
2055 | ; |
---|
2056 | |
---|
2057 | identifier_or_type_name: |
---|
2058 | identifier |
---|
2059 | | TYPEDEFname |
---|
2060 | | TYPEGENname |
---|
2061 | ; |
---|
2062 | |
---|
2063 | no_attr_identifier_or_type_name: |
---|
2064 | no_attr_identifier |
---|
2065 | | TYPEDEFname |
---|
2066 | | TYPEGENname |
---|
2067 | ; |
---|
2068 | |
---|
2069 | type_no_function: // sizeof, alignof, cast (constructor) |
---|
2070 | cfa_abstract_declarator_tuple // CFA |
---|
2071 | | type_specifier |
---|
2072 | | type_specifier abstract_declarator |
---|
2073 | { $$ = $2->addType( $1 ); } |
---|
2074 | ; |
---|
2075 | |
---|
2076 | type: // typeof, assertion |
---|
2077 | type_no_function |
---|
2078 | | cfa_abstract_function // CFA |
---|
2079 | ; |
---|
2080 | |
---|
2081 | initializer_opt: |
---|
2082 | // empty |
---|
2083 | { $$ = nullptr; } |
---|
2084 | | '=' initializer |
---|
2085 | { $$ = $2; } |
---|
2086 | | '=' VOID |
---|
2087 | { $$ = nullptr; } |
---|
2088 | | ATassign initializer |
---|
2089 | { $$ = $2->set_maybeConstructed( false ); } |
---|
2090 | ; |
---|
2091 | |
---|
2092 | initializer: |
---|
2093 | assignment_expression { $$ = new InitializerNode( $1 ); } |
---|
2094 | | '{' initializer_list_opt comma_opt '}' { $$ = new InitializerNode( $2, true ); } |
---|
2095 | ; |
---|
2096 | |
---|
2097 | initializer_list_opt: |
---|
2098 | // empty |
---|
2099 | { $$ = nullptr; } |
---|
2100 | | initializer |
---|
2101 | | designation initializer { $$ = $2->set_designators( $1 ); } |
---|
2102 | | initializer_list_opt ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); } |
---|
2103 | | initializer_list_opt ',' designation initializer |
---|
2104 | { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); } |
---|
2105 | ; |
---|
2106 | |
---|
2107 | // There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of |
---|
2108 | // '=' to separator the designator from the initializer value, as in: |
---|
2109 | // |
---|
2110 | // int x[10] = { [1] = 3 }; |
---|
2111 | // |
---|
2112 | // The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA |
---|
2113 | // changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for |
---|
2114 | // field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to |
---|
2115 | // shift/reduce conflicts |
---|
2116 | |
---|
2117 | designation: |
---|
2118 | designator_list ':' // C99, CFA uses ":" instead of "=" |
---|
2119 | | no_attr_identifier ':' // GCC, field name |
---|
2120 | { $$ = new ExpressionNode( build_varref( $1 ) ); } |
---|
2121 | ; |
---|
2122 | |
---|
2123 | designator_list: // C99 |
---|
2124 | designator |
---|
2125 | | designator_list designator |
---|
2126 | { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); } |
---|
2127 | //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); } |
---|
2128 | ; |
---|
2129 | |
---|
2130 | designator: |
---|
2131 | '.' no_attr_identifier // C99, field name |
---|
2132 | { $$ = new ExpressionNode( build_varref( $2 ) ); } |
---|
2133 | | '[' push assignment_expression pop ']' // C99, single array element |
---|
2134 | // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple. |
---|
2135 | { $$ = $3; } |
---|
2136 | | '[' push subrange pop ']' // CFA, multiple array elements |
---|
2137 | { $$ = $3; } |
---|
2138 | | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements |
---|
2139 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $3 ), maybeMoveBuild< Expression >( $5 ) ) ); } |
---|
2140 | | '.' '[' push field_list pop ']' // CFA, tuple field selector |
---|
2141 | { $$ = $4; } |
---|
2142 | ; |
---|
2143 | |
---|
2144 | // The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters, |
---|
2145 | // rather than an object-oriented type system. This required four groups of extensions: |
---|
2146 | // |
---|
2147 | // Overloading: function, data, and operator identifiers may be overloaded. |
---|
2148 | // |
---|
2149 | // Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object |
---|
2150 | // and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide |
---|
2151 | // definitions of new types. Type declarations with storage class "extern" provide opaque types. |
---|
2152 | // |
---|
2153 | // Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call |
---|
2154 | // site. A polymorphic function is not a template; it is a function, with an address and a type. |
---|
2155 | // |
---|
2156 | // Specifications and Assertions: Specifications are collections of declarations parameterized by one or more |
---|
2157 | // types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass |
---|
2158 | // hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or |
---|
2159 | // types provide the operations declared by a specification. Assertions are normally used to declare requirements |
---|
2160 | // on type arguments of polymorphic functions. |
---|
2161 | |
---|
2162 | type_parameter_list: // CFA |
---|
2163 | type_parameter |
---|
2164 | { $$ = $1; } |
---|
2165 | | type_parameter_list ',' type_parameter |
---|
2166 | { $$ = $1->appendList( $3 ); } |
---|
2167 | ; |
---|
2168 | |
---|
2169 | type_initializer_opt: // CFA |
---|
2170 | // empty |
---|
2171 | { $$ = nullptr; } |
---|
2172 | | '=' type |
---|
2173 | { $$ = $2; } |
---|
2174 | ; |
---|
2175 | |
---|
2176 | type_parameter: // CFA |
---|
2177 | type_class no_attr_identifier_or_type_name |
---|
2178 | { typedefTable.addToEnclosingScope( *$2, TYPEDEFname ); } |
---|
2179 | type_initializer_opt assertion_list_opt |
---|
2180 | { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); } |
---|
2181 | | type_specifier identifier_parameter_declarator |
---|
2182 | | assertion_list |
---|
2183 | { $$ = DeclarationNode::newTypeParam( DeclarationNode::Dtype, new string( DeclarationNode::anonymous.newName() ) )->addAssertions( $1 ); } |
---|
2184 | ; |
---|
2185 | |
---|
2186 | type_class: // CFA |
---|
2187 | OTYPE |
---|
2188 | { $$ = DeclarationNode::Otype; } |
---|
2189 | | DTYPE |
---|
2190 | { $$ = DeclarationNode::Dtype; } |
---|
2191 | | FTYPE |
---|
2192 | { $$ = DeclarationNode::Ftype; } |
---|
2193 | | TTYPE |
---|
2194 | { $$ = DeclarationNode::Ttype; } |
---|
2195 | ; |
---|
2196 | |
---|
2197 | assertion_list_opt: // CFA |
---|
2198 | // empty |
---|
2199 | { $$ = nullptr; } |
---|
2200 | | assertion_list |
---|
2201 | ; |
---|
2202 | |
---|
2203 | assertion_list: // CFA |
---|
2204 | assertion |
---|
2205 | | assertion_list assertion |
---|
2206 | { $$ = $1 ? $1->appendList( $2 ) : $2; } |
---|
2207 | ; |
---|
2208 | |
---|
2209 | assertion: // CFA |
---|
2210 | '|' no_attr_identifier_or_type_name '(' type_list ')' |
---|
2211 | { $$ = DeclarationNode::newTraitUse( $2, $4 ); } |
---|
2212 | | '|' '{' push trait_declaration_list '}' |
---|
2213 | { $$ = $4; } |
---|
2214 | | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')' |
---|
2215 | { SemanticError( yylloc, "Generic data-type assertion is currently unimplemented." ); $$ = nullptr; } |
---|
2216 | ; |
---|
2217 | |
---|
2218 | type_list: // CFA |
---|
2219 | type |
---|
2220 | { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); } |
---|
2221 | | assignment_expression |
---|
2222 | | type_list ',' type |
---|
2223 | { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) ) ); } |
---|
2224 | | type_list ',' assignment_expression |
---|
2225 | { $$ = (ExpressionNode *)( $1->set_last( $3 )); } |
---|
2226 | ; |
---|
2227 | |
---|
2228 | type_declaring_list: // CFA |
---|
2229 | OTYPE type_declarator |
---|
2230 | { $$ = $2; } |
---|
2231 | | storage_class_list OTYPE type_declarator |
---|
2232 | { $$ = $3->addQualifiers( $1 ); } |
---|
2233 | | type_declaring_list ',' type_declarator |
---|
2234 | { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); } |
---|
2235 | ; |
---|
2236 | |
---|
2237 | type_declarator: // CFA |
---|
2238 | type_declarator_name assertion_list_opt |
---|
2239 | { $$ = $1->addAssertions( $2 ); } |
---|
2240 | | type_declarator_name assertion_list_opt '=' type |
---|
2241 | { $$ = $1->addAssertions( $2 )->addType( $4 ); } |
---|
2242 | ; |
---|
2243 | |
---|
2244 | type_declarator_name: // CFA |
---|
2245 | no_attr_identifier_or_type_name |
---|
2246 | { |
---|
2247 | typedefTable.addToEnclosingScope( *$1, TYPEDEFname ); |
---|
2248 | $$ = DeclarationNode::newTypeDecl( $1, 0 ); |
---|
2249 | } |
---|
2250 | | no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' |
---|
2251 | { |
---|
2252 | typedefTable.addToEnclosingScope( *$1, TYPEGENname ); |
---|
2253 | $$ = DeclarationNode::newTypeDecl( $1, $4 ); |
---|
2254 | } |
---|
2255 | ; |
---|
2256 | |
---|
2257 | trait_specifier: // CFA |
---|
2258 | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}' |
---|
2259 | { $$ = DeclarationNode::newTrait( $2, $5, 0 ); } |
---|
2260 | | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' |
---|
2261 | { typedefTable.enterScope(); } |
---|
2262 | trait_declaration_list '}' |
---|
2263 | { $$ = DeclarationNode::newTrait( $2, $5, $10 ); } |
---|
2264 | ; |
---|
2265 | |
---|
2266 | trait_declaration_list: // CFA |
---|
2267 | trait_declaration |
---|
2268 | | trait_declaration_list push trait_declaration |
---|
2269 | { $$ = $1->appendList( $3 ); } |
---|
2270 | ; |
---|
2271 | |
---|
2272 | trait_declaration: // CFA |
---|
2273 | cfa_trait_declaring_list pop ';' |
---|
2274 | | trait_declaring_list pop ';' |
---|
2275 | ; |
---|
2276 | |
---|
2277 | cfa_trait_declaring_list: // CFA |
---|
2278 | cfa_variable_specifier |
---|
2279 | | cfa_function_specifier |
---|
2280 | | cfa_trait_declaring_list pop ',' push identifier_or_type_name |
---|
2281 | { $$ = $1->appendList( $1->cloneType( $5 ) ); } |
---|
2282 | ; |
---|
2283 | |
---|
2284 | trait_declaring_list: // CFA |
---|
2285 | type_specifier declarator |
---|
2286 | { $$ = $2->addType( $1 ); } |
---|
2287 | | trait_declaring_list pop ',' push declarator |
---|
2288 | { $$ = $1->appendList( $1->cloneBaseType( $5 ) ); } |
---|
2289 | ; |
---|
2290 | |
---|
2291 | //***************************** EXTERNAL DEFINITIONS ***************************** |
---|
2292 | |
---|
2293 | translation_unit: |
---|
2294 | // empty |
---|
2295 | {} // empty input file |
---|
2296 | | external_definition_list |
---|
2297 | { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; } |
---|
2298 | ; |
---|
2299 | |
---|
2300 | external_definition_list: |
---|
2301 | external_definition |
---|
2302 | | external_definition_list |
---|
2303 | { forall = xxx; } |
---|
2304 | push external_definition |
---|
2305 | { $$ = $1 ? $1->appendList( $4 ) : $4; } |
---|
2306 | ; |
---|
2307 | |
---|
2308 | external_definition_list_opt: |
---|
2309 | // empty |
---|
2310 | { $$ = nullptr; } |
---|
2311 | | external_definition_list |
---|
2312 | ; |
---|
2313 | |
---|
2314 | external_definition: |
---|
2315 | declaration |
---|
2316 | | external_function_definition |
---|
2317 | | ASM '(' string_literal ')' ';' // GCC, global assembler statement |
---|
2318 | { |
---|
2319 | $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) ); |
---|
2320 | } |
---|
2321 | | EXTERN STRINGliteral // C++-style linkage specifier |
---|
2322 | { |
---|
2323 | linkageStack.push( linkage ); // handle nested extern "C"/"Cforall" |
---|
2324 | linkage = LinkageSpec::linkageUpdate( yylloc, linkage, $2 ); |
---|
2325 | } |
---|
2326 | '{' external_definition_list_opt '}' |
---|
2327 | { |
---|
2328 | linkage = linkageStack.top(); |
---|
2329 | linkageStack.pop(); |
---|
2330 | $$ = $5; |
---|
2331 | } |
---|
2332 | | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown |
---|
2333 | { |
---|
2334 | distExt( $2 ); // mark all fields in list |
---|
2335 | $$ = $2; |
---|
2336 | } |
---|
2337 | | type_qualifier_list |
---|
2338 | { if ( $1->type->forall ) xxx = forall = true; } // remember generic type |
---|
2339 | push '{' external_definition_list '}' // CFA, namespace |
---|
2340 | { |
---|
2341 | for ( DeclarationNode * iter = $5; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) { |
---|
2342 | if ( isMangled( iter->linkage ) ) { // ignore extern "C" |
---|
2343 | iter->addQualifiers( $1->clone() ); |
---|
2344 | } // if |
---|
2345 | } // for |
---|
2346 | xxx = false; |
---|
2347 | delete $1; |
---|
2348 | $$ = $5; |
---|
2349 | } |
---|
2350 | | declaration_qualifier_list |
---|
2351 | { if ( $1->type->forall ) xxx = forall = true; } // remember generic type |
---|
2352 | push '{' external_definition_list '}' // CFA, namespace |
---|
2353 | { |
---|
2354 | for ( DeclarationNode * iter = $5; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) { |
---|
2355 | if ( isMangled( iter->linkage ) ) { // ignore extern "C" |
---|
2356 | iter->addQualifiers( $1->clone() ); |
---|
2357 | } // if |
---|
2358 | } // for |
---|
2359 | xxx = false; |
---|
2360 | delete $1; |
---|
2361 | $$ = $5; |
---|
2362 | } |
---|
2363 | | declaration_qualifier_list type_qualifier_list |
---|
2364 | { |
---|
2365 | // forall must be in the type_qualifier_list |
---|
2366 | if ( $2->type->forall ) xxx = forall = true; // remember generic type |
---|
2367 | } |
---|
2368 | push '{' external_definition_list '}' // CFA, namespace |
---|
2369 | { |
---|
2370 | for ( DeclarationNode * iter = $6; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) { |
---|
2371 | if ( isMangled( iter->linkage ) && isMangled( $2->linkage ) ) { // ignore extern "C" |
---|
2372 | iter->addQualifiers( $1->clone() ); |
---|
2373 | iter->addQualifiers( $2->clone() ); |
---|
2374 | } // if |
---|
2375 | } // for |
---|
2376 | xxx = false; |
---|
2377 | delete $1; |
---|
2378 | delete $2; |
---|
2379 | $$ = $6; |
---|
2380 | } |
---|
2381 | ; |
---|
2382 | |
---|
2383 | external_function_definition: |
---|
2384 | function_definition |
---|
2385 | // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of |
---|
2386 | // legacy code with global functions missing the type-specifier for the return type, and assuming "int". |
---|
2387 | // Parsing is possible because function_definition does not appear in the context of an expression (nested |
---|
2388 | // functions preclude this concession, i.e., all nested function must have a return type). A function prototype |
---|
2389 | // declaration must still have a type_specifier. OBSOLESCENT (see 1) |
---|
2390 | | function_declarator compound_statement |
---|
2391 | { $$ = $1->addFunctionBody( $2 ); } |
---|
2392 | | KR_function_declarator KR_declaration_list_opt compound_statement |
---|
2393 | { $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 ); } |
---|
2394 | ; |
---|
2395 | |
---|
2396 | with_clause_opt: |
---|
2397 | // empty |
---|
2398 | { $$ = nullptr; forall = false; } |
---|
2399 | | WITH '(' tuple_expression_list ')' |
---|
2400 | { $$ = $3; forall = false; } |
---|
2401 | ; |
---|
2402 | |
---|
2403 | function_definition: |
---|
2404 | cfa_function_declaration with_clause_opt compound_statement // CFA |
---|
2405 | { |
---|
2406 | // Add the function body to the last identifier in the function definition list, i.e., foo3: |
---|
2407 | // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; } |
---|
2408 | $1->get_last()->addFunctionBody( $3, $2 ); |
---|
2409 | $$ = $1; |
---|
2410 | } |
---|
2411 | | declaration_specifier function_declarator with_clause_opt compound_statement |
---|
2412 | { |
---|
2413 | rebindForall( $1, $2 ); |
---|
2414 | $$ = $2->addFunctionBody( $4, $3 )->addType( $1 ); |
---|
2415 | } |
---|
2416 | | declaration_specifier variable_type_redeclarator with_clause_opt compound_statement |
---|
2417 | { |
---|
2418 | rebindForall( $1, $2 ); |
---|
2419 | $$ = $2->addFunctionBody( $4, $3 )->addType( $1 ); |
---|
2420 | } |
---|
2421 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2422 | | type_qualifier_list function_declarator with_clause_opt compound_statement |
---|
2423 | { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); } |
---|
2424 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2425 | | declaration_qualifier_list function_declarator with_clause_opt compound_statement |
---|
2426 | { $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 ); } |
---|
2427 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2428 | | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement |
---|
2429 | { $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 ); } |
---|
2430 | |
---|
2431 | // Old-style K&R function definition, OBSOLESCENT (see 4) |
---|
2432 | | declaration_specifier KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
---|
2433 | { |
---|
2434 | rebindForall( $1, $2 ); |
---|
2435 | $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 ); |
---|
2436 | } |
---|
2437 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2438 | | type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
---|
2439 | { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); } |
---|
2440 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2441 | | declaration_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
---|
2442 | { $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 ); } |
---|
2443 | // handles default int return type, OBSOLESCENT (see 1) |
---|
2444 | | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement |
---|
2445 | { $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 ); } |
---|
2446 | ; |
---|
2447 | |
---|
2448 | declarator: |
---|
2449 | variable_declarator |
---|
2450 | | variable_type_redeclarator |
---|
2451 | | function_declarator |
---|
2452 | ; |
---|
2453 | |
---|
2454 | subrange: |
---|
2455 | constant_expression '~' constant_expression // CFA, integer subrange |
---|
2456 | { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); } |
---|
2457 | ; |
---|
2458 | |
---|
2459 | asm_name_opt: // GCC |
---|
2460 | // empty |
---|
2461 | { $$ = nullptr; } |
---|
2462 | | ASM '(' string_literal ')' attribute_list_opt |
---|
2463 | { |
---|
2464 | DeclarationNode * name = new DeclarationNode(); |
---|
2465 | name->asmName = $3; |
---|
2466 | $$ = name->addQualifiers( $5 ); |
---|
2467 | } |
---|
2468 | ; |
---|
2469 | |
---|
2470 | attribute_list_opt: // GCC |
---|
2471 | // empty |
---|
2472 | { $$ = nullptr; } |
---|
2473 | | attribute_list |
---|
2474 | ; |
---|
2475 | |
---|
2476 | attribute_list: // GCC |
---|
2477 | attribute |
---|
2478 | | attribute_list attribute |
---|
2479 | { $$ = $2->addQualifiers( $1 ); } |
---|
2480 | ; |
---|
2481 | |
---|
2482 | attribute: // GCC |
---|
2483 | ATTRIBUTE '(' '(' attribute_name_list ')' ')' |
---|
2484 | { $$ = $4; } |
---|
2485 | ; |
---|
2486 | |
---|
2487 | attribute_name_list: // GCC |
---|
2488 | attribute_name |
---|
2489 | | attribute_name_list ',' attribute_name |
---|
2490 | { $$ = $3->addQualifiers( $1 ); } |
---|
2491 | ; |
---|
2492 | |
---|
2493 | attribute_name: // GCC |
---|
2494 | // empty |
---|
2495 | { $$ = nullptr; } |
---|
2496 | | attr_name |
---|
2497 | { $$ = DeclarationNode::newAttribute( $1 ); } |
---|
2498 | | attr_name '(' argument_expression_list ')' |
---|
2499 | { $$ = DeclarationNode::newAttribute( $1, $3 ); } |
---|
2500 | ; |
---|
2501 | |
---|
2502 | attr_name: // GCC |
---|
2503 | IDENTIFIER |
---|
2504 | | quasi_keyword |
---|
2505 | | TYPEDEFname |
---|
2506 | | TYPEGENname |
---|
2507 | | FALLTHROUGH |
---|
2508 | { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; } |
---|
2509 | | CONST |
---|
2510 | { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; } |
---|
2511 | ; |
---|
2512 | |
---|
2513 | // ============================================================================ |
---|
2514 | // The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary |
---|
2515 | // because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as |
---|
2516 | // in: |
---|
2517 | // |
---|
2518 | // int (*f())[10] { ... }; |
---|
2519 | // ... (*f())[3] += 1; // definition mimics usage |
---|
2520 | // |
---|
2521 | // Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of |
---|
2522 | // the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context. |
---|
2523 | // ============================================================================ |
---|
2524 | |
---|
2525 | // ---------------------------------------------------------------------------- |
---|
2526 | // The set of valid declarators before a compound statement for defining a function is less than the set of declarators |
---|
2527 | // to define a variable or function prototype, e.g.: |
---|
2528 | // |
---|
2529 | // valid declaration invalid definition |
---|
2530 | // ----------------- ------------------ |
---|
2531 | // int f; int f {} |
---|
2532 | // int *f; int *f {} |
---|
2533 | // int f[10]; int f[10] {} |
---|
2534 | // int (*f)(int); int (*f)(int) {} |
---|
2535 | // |
---|
2536 | // To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence |
---|
2537 | // variable_declarator and function_declarator. |
---|
2538 | // ---------------------------------------------------------------------------- |
---|
2539 | |
---|
2540 | // This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes |
---|
2541 | // declaring an array of functions versus a pointer to an array of functions. |
---|
2542 | |
---|
2543 | variable_declarator: |
---|
2544 | paren_identifier attribute_list_opt |
---|
2545 | { $$ = $1->addQualifiers( $2 ); } |
---|
2546 | | variable_ptr |
---|
2547 | | variable_array attribute_list_opt |
---|
2548 | { $$ = $1->addQualifiers( $2 ); } |
---|
2549 | | variable_function attribute_list_opt |
---|
2550 | { $$ = $1->addQualifiers( $2 ); } |
---|
2551 | ; |
---|
2552 | |
---|
2553 | paren_identifier: |
---|
2554 | identifier |
---|
2555 | { $$ = DeclarationNode::newName( $1 ); } |
---|
2556 | | '(' paren_identifier ')' // redundant parenthesis |
---|
2557 | { $$ = $2; } |
---|
2558 | ; |
---|
2559 | |
---|
2560 | variable_ptr: |
---|
2561 | ptrref_operator variable_declarator |
---|
2562 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2563 | | ptrref_operator type_qualifier_list variable_declarator |
---|
2564 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2565 | | '(' variable_ptr ')' attribute_list_opt |
---|
2566 | { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis |
---|
2567 | ; |
---|
2568 | |
---|
2569 | variable_array: |
---|
2570 | paren_identifier array_dimension |
---|
2571 | { $$ = $1->addArray( $2 ); } |
---|
2572 | | '(' variable_ptr ')' array_dimension |
---|
2573 | { $$ = $2->addArray( $4 ); } |
---|
2574 | | '(' variable_array ')' multi_array_dimension // redundant parenthesis |
---|
2575 | { $$ = $2->addArray( $4 ); } |
---|
2576 | | '(' variable_array ')' // redundant parenthesis |
---|
2577 | { $$ = $2; } |
---|
2578 | ; |
---|
2579 | |
---|
2580 | variable_function: |
---|
2581 | '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2582 | { $$ = $2->addParamList( $6 ); } |
---|
2583 | | '(' variable_function ')' // redundant parenthesis |
---|
2584 | { $$ = $2; } |
---|
2585 | ; |
---|
2586 | |
---|
2587 | // This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is |
---|
2588 | // no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist |
---|
2589 | // is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions. |
---|
2590 | |
---|
2591 | function_declarator: |
---|
2592 | function_no_ptr attribute_list_opt |
---|
2593 | { $$ = $1->addQualifiers( $2 ); } |
---|
2594 | | function_ptr |
---|
2595 | | function_array attribute_list_opt |
---|
2596 | { $$ = $1->addQualifiers( $2 ); } |
---|
2597 | ; |
---|
2598 | |
---|
2599 | function_no_ptr: |
---|
2600 | paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2601 | { $$ = $1->addParamList( $4 ); } |
---|
2602 | | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')' |
---|
2603 | { $$ = $2->addParamList( $6 ); } |
---|
2604 | | '(' function_no_ptr ')' // redundant parenthesis |
---|
2605 | { $$ = $2; } |
---|
2606 | ; |
---|
2607 | |
---|
2608 | function_ptr: |
---|
2609 | ptrref_operator function_declarator |
---|
2610 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2611 | | ptrref_operator type_qualifier_list function_declarator |
---|
2612 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2613 | | '(' function_ptr ')' |
---|
2614 | { $$ = $2; } |
---|
2615 | ; |
---|
2616 | |
---|
2617 | function_array: |
---|
2618 | '(' function_ptr ')' array_dimension |
---|
2619 | { $$ = $2->addArray( $4 ); } |
---|
2620 | | '(' function_array ')' multi_array_dimension // redundant parenthesis |
---|
2621 | { $$ = $2->addArray( $4 ); } |
---|
2622 | | '(' function_array ')' // redundant parenthesis |
---|
2623 | { $$ = $2; } |
---|
2624 | ; |
---|
2625 | |
---|
2626 | // This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4) |
---|
2627 | // |
---|
2628 | // f( a, b, c ) int a, *b, c[]; {} |
---|
2629 | // |
---|
2630 | // that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes |
---|
2631 | // returning arrays and functions versus pointers to arrays and functions. |
---|
2632 | |
---|
2633 | KR_function_declarator: |
---|
2634 | KR_function_no_ptr |
---|
2635 | | KR_function_ptr |
---|
2636 | | KR_function_array |
---|
2637 | ; |
---|
2638 | |
---|
2639 | KR_function_no_ptr: |
---|
2640 | paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter |
---|
2641 | { $$ = $1->addIdList( $3 ); } |
---|
2642 | | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')' |
---|
2643 | { $$ = $2->addParamList( $6 ); } |
---|
2644 | | '(' KR_function_no_ptr ')' // redundant parenthesis |
---|
2645 | { $$ = $2; } |
---|
2646 | ; |
---|
2647 | |
---|
2648 | KR_function_ptr: |
---|
2649 | ptrref_operator KR_function_declarator |
---|
2650 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2651 | | ptrref_operator type_qualifier_list KR_function_declarator |
---|
2652 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2653 | | '(' KR_function_ptr ')' |
---|
2654 | { $$ = $2; } |
---|
2655 | ; |
---|
2656 | |
---|
2657 | KR_function_array: |
---|
2658 | '(' KR_function_ptr ')' array_dimension |
---|
2659 | { $$ = $2->addArray( $4 ); } |
---|
2660 | | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis |
---|
2661 | { $$ = $2->addArray( $4 ); } |
---|
2662 | | '(' KR_function_array ')' // redundant parenthesis |
---|
2663 | { $$ = $2; } |
---|
2664 | ; |
---|
2665 | |
---|
2666 | // This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.: |
---|
2667 | // |
---|
2668 | // typedef int foo; |
---|
2669 | // { |
---|
2670 | // int foo; // redefine typedef name in new scope |
---|
2671 | // } |
---|
2672 | // |
---|
2673 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
---|
2674 | // and functions versus pointers to arrays and functions. |
---|
2675 | |
---|
2676 | variable_type_redeclarator: |
---|
2677 | paren_type attribute_list_opt |
---|
2678 | { $$ = $1->addQualifiers( $2 ); } |
---|
2679 | | type_ptr |
---|
2680 | | type_array attribute_list_opt |
---|
2681 | { $$ = $1->addQualifiers( $2 ); } |
---|
2682 | | type_function attribute_list_opt |
---|
2683 | { $$ = $1->addQualifiers( $2 ); } |
---|
2684 | ; |
---|
2685 | |
---|
2686 | paren_type: |
---|
2687 | typedef |
---|
2688 | // hide type name in enclosing scope by variable name |
---|
2689 | { typedefTable.addToEnclosingScope( *$1->name, IDENTIFIER ); } |
---|
2690 | | '(' paren_type ')' |
---|
2691 | { $$ = $2; } |
---|
2692 | ; |
---|
2693 | |
---|
2694 | type_ptr: |
---|
2695 | ptrref_operator variable_type_redeclarator |
---|
2696 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2697 | | ptrref_operator type_qualifier_list variable_type_redeclarator |
---|
2698 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2699 | | '(' type_ptr ')' attribute_list_opt |
---|
2700 | { $$ = $2->addQualifiers( $4 ); } |
---|
2701 | ; |
---|
2702 | |
---|
2703 | type_array: |
---|
2704 | paren_type array_dimension |
---|
2705 | { $$ = $1->addArray( $2 ); } |
---|
2706 | | '(' type_ptr ')' array_dimension |
---|
2707 | { $$ = $2->addArray( $4 ); } |
---|
2708 | | '(' type_array ')' multi_array_dimension // redundant parenthesis |
---|
2709 | { $$ = $2->addArray( $4 ); } |
---|
2710 | | '(' type_array ')' // redundant parenthesis |
---|
2711 | { $$ = $2; } |
---|
2712 | ; |
---|
2713 | |
---|
2714 | type_function: |
---|
2715 | paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2716 | { $$ = $1->addParamList( $4 ); } |
---|
2717 | | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2718 | { $$ = $2->addParamList( $6 ); } |
---|
2719 | | '(' type_function ')' // redundant parenthesis |
---|
2720 | { $$ = $2; } |
---|
2721 | ; |
---|
2722 | |
---|
2723 | // This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a |
---|
2724 | // typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes |
---|
2725 | // declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus |
---|
2726 | // pointers to arrays and functions. |
---|
2727 | |
---|
2728 | identifier_parameter_declarator: |
---|
2729 | paren_identifier attribute_list_opt |
---|
2730 | { $$ = $1->addQualifiers( $2 ); } |
---|
2731 | | '&' MUTEX paren_identifier attribute_list_opt |
---|
2732 | { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); } |
---|
2733 | | identifier_parameter_ptr |
---|
2734 | | identifier_parameter_array attribute_list_opt |
---|
2735 | { $$ = $1->addQualifiers( $2 ); } |
---|
2736 | | identifier_parameter_function attribute_list_opt |
---|
2737 | { $$ = $1->addQualifiers( $2 ); } |
---|
2738 | ; |
---|
2739 | |
---|
2740 | identifier_parameter_ptr: |
---|
2741 | ptrref_operator identifier_parameter_declarator |
---|
2742 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2743 | | ptrref_operator type_qualifier_list identifier_parameter_declarator |
---|
2744 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2745 | | '(' identifier_parameter_ptr ')' attribute_list_opt |
---|
2746 | { $$ = $2->addQualifiers( $4 ); } |
---|
2747 | ; |
---|
2748 | |
---|
2749 | identifier_parameter_array: |
---|
2750 | paren_identifier array_parameter_dimension |
---|
2751 | { $$ = $1->addArray( $2 ); } |
---|
2752 | | '(' identifier_parameter_ptr ')' array_dimension |
---|
2753 | { $$ = $2->addArray( $4 ); } |
---|
2754 | | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis |
---|
2755 | { $$ = $2->addArray( $4 ); } |
---|
2756 | | '(' identifier_parameter_array ')' // redundant parenthesis |
---|
2757 | { $$ = $2; } |
---|
2758 | ; |
---|
2759 | |
---|
2760 | identifier_parameter_function: |
---|
2761 | paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2762 | { $$ = $1->addParamList( $4 ); } |
---|
2763 | | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2764 | { $$ = $2->addParamList( $6 ); } |
---|
2765 | | '(' identifier_parameter_function ')' // redundant parenthesis |
---|
2766 | { $$ = $2; } |
---|
2767 | ; |
---|
2768 | |
---|
2769 | // This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name, |
---|
2770 | // e.g.: |
---|
2771 | // |
---|
2772 | // typedef int foo; |
---|
2773 | // forall( otype T ) struct foo; |
---|
2774 | // int f( int foo ); // redefine typedef name in new scope |
---|
2775 | // |
---|
2776 | // and allows the C99 array options, which can only appear in a parameter list. |
---|
2777 | |
---|
2778 | type_parameter_redeclarator: |
---|
2779 | typedef attribute_list_opt |
---|
2780 | { $$ = $1->addQualifiers( $2 ); } |
---|
2781 | | '&' MUTEX typedef attribute_list_opt |
---|
2782 | { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); } |
---|
2783 | | type_parameter_ptr |
---|
2784 | | type_parameter_array attribute_list_opt |
---|
2785 | { $$ = $1->addQualifiers( $2 ); } |
---|
2786 | | type_parameter_function attribute_list_opt |
---|
2787 | { $$ = $1->addQualifiers( $2 ); } |
---|
2788 | ; |
---|
2789 | |
---|
2790 | typedef: |
---|
2791 | TYPEDEFname |
---|
2792 | { $$ = DeclarationNode::newName( $1 ); } |
---|
2793 | | TYPEGENname |
---|
2794 | { $$ = DeclarationNode::newName( $1 ); } |
---|
2795 | ; |
---|
2796 | |
---|
2797 | type_parameter_ptr: |
---|
2798 | ptrref_operator type_parameter_redeclarator |
---|
2799 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2800 | | ptrref_operator type_qualifier_list type_parameter_redeclarator |
---|
2801 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2802 | | '(' type_parameter_ptr ')' attribute_list_opt |
---|
2803 | { $$ = $2->addQualifiers( $4 ); } |
---|
2804 | ; |
---|
2805 | |
---|
2806 | type_parameter_array: |
---|
2807 | typedef array_parameter_dimension |
---|
2808 | { $$ = $1->addArray( $2 ); } |
---|
2809 | | '(' type_parameter_ptr ')' array_parameter_dimension |
---|
2810 | { $$ = $2->addArray( $4 ); } |
---|
2811 | ; |
---|
2812 | |
---|
2813 | type_parameter_function: |
---|
2814 | typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2815 | { $$ = $1->addParamList( $4 ); } |
---|
2816 | | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2817 | { $$ = $2->addParamList( $6 ); } |
---|
2818 | ; |
---|
2819 | |
---|
2820 | // This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to |
---|
2821 | // which the type applies, e.g.: |
---|
2822 | // |
---|
2823 | // sizeof( int ); |
---|
2824 | // sizeof( int * ); |
---|
2825 | // sizeof( int [10] ); |
---|
2826 | // sizeof( int (*)() ); |
---|
2827 | // sizeof( int () ); |
---|
2828 | // |
---|
2829 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
---|
2830 | // and functions versus pointers to arrays and functions. |
---|
2831 | |
---|
2832 | abstract_declarator: |
---|
2833 | abstract_ptr |
---|
2834 | | abstract_array attribute_list_opt |
---|
2835 | { $$ = $1->addQualifiers( $2 ); } |
---|
2836 | | abstract_function attribute_list_opt |
---|
2837 | { $$ = $1->addQualifiers( $2 ); } |
---|
2838 | ; |
---|
2839 | |
---|
2840 | abstract_ptr: |
---|
2841 | ptrref_operator |
---|
2842 | { $$ = DeclarationNode::newPointer( 0, $1 ); } |
---|
2843 | | ptrref_operator type_qualifier_list |
---|
2844 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
---|
2845 | | ptrref_operator abstract_declarator |
---|
2846 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
2847 | | ptrref_operator type_qualifier_list abstract_declarator |
---|
2848 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2849 | | '(' abstract_ptr ')' attribute_list_opt |
---|
2850 | { $$ = $2->addQualifiers( $4 ); } |
---|
2851 | ; |
---|
2852 | |
---|
2853 | abstract_array: |
---|
2854 | array_dimension |
---|
2855 | | '(' abstract_ptr ')' array_dimension |
---|
2856 | { $$ = $2->addArray( $4 ); } |
---|
2857 | | '(' abstract_array ')' multi_array_dimension // redundant parenthesis |
---|
2858 | { $$ = $2->addArray( $4 ); } |
---|
2859 | | '(' abstract_array ')' // redundant parenthesis |
---|
2860 | { $$ = $2; } |
---|
2861 | ; |
---|
2862 | |
---|
2863 | abstract_function: |
---|
2864 | '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2865 | { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); } |
---|
2866 | | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2867 | { $$ = $2->addParamList( $6 ); } |
---|
2868 | | '(' abstract_function ')' // redundant parenthesis |
---|
2869 | { $$ = $2; } |
---|
2870 | ; |
---|
2871 | |
---|
2872 | array_dimension: |
---|
2873 | // Only the first dimension can be empty. |
---|
2874 | '[' ']' |
---|
2875 | { $$ = DeclarationNode::newArray( 0, 0, false ); } |
---|
2876 | | '[' ']' multi_array_dimension |
---|
2877 | { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); } |
---|
2878 | | multi_array_dimension |
---|
2879 | ; |
---|
2880 | |
---|
2881 | multi_array_dimension: |
---|
2882 | '[' push assignment_expression pop ']' |
---|
2883 | { $$ = DeclarationNode::newArray( $3, 0, false ); } |
---|
2884 | | '[' push '*' pop ']' // C99 |
---|
2885 | { $$ = DeclarationNode::newVarArray( 0 ); } |
---|
2886 | | multi_array_dimension '[' push assignment_expression pop ']' |
---|
2887 | { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); } |
---|
2888 | | multi_array_dimension '[' push '*' pop ']' // C99 |
---|
2889 | { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); } |
---|
2890 | ; |
---|
2891 | |
---|
2892 | // This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no |
---|
2893 | // identifier to which the type applies, e.g.: |
---|
2894 | // |
---|
2895 | // int f( int ); // not handled here |
---|
2896 | // int f( int * ); // abstract function-prototype parameter; no parameter name specified |
---|
2897 | // int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified |
---|
2898 | // int f( int (int) ); // abstract function-prototype parameter; no parameter name specified |
---|
2899 | // |
---|
2900 | // The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays |
---|
2901 | // and functions versus pointers to arrays and functions. In addition, the pattern handles the |
---|
2902 | // special meaning of parenthesis around a typedef name: |
---|
2903 | // |
---|
2904 | // ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in |
---|
2905 | // parentheses is taken to be an abstract declarator that specifies a function with a single parameter, |
---|
2906 | // not as redundant parentheses around the identifier." |
---|
2907 | // |
---|
2908 | // For example: |
---|
2909 | // |
---|
2910 | // typedef float T; |
---|
2911 | // int f( int ( T [5] ) ); // see abstract_parameter_declarator |
---|
2912 | // int g( int ( T ( int ) ) ); // see abstract_parameter_declarator |
---|
2913 | // int f( int f1( T a[5] ) ); // see identifier_parameter_declarator |
---|
2914 | // int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator |
---|
2915 | // |
---|
2916 | // In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and |
---|
2917 | // not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of |
---|
2918 | // functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and |
---|
2919 | // functions. |
---|
2920 | |
---|
2921 | abstract_parameter_declarator: |
---|
2922 | abstract_parameter_ptr |
---|
2923 | | '&' MUTEX attribute_list_opt |
---|
2924 | { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); } |
---|
2925 | | abstract_parameter_array attribute_list_opt |
---|
2926 | { $$ = $1->addQualifiers( $2 ); } |
---|
2927 | | abstract_parameter_function attribute_list_opt |
---|
2928 | { $$ = $1->addQualifiers( $2 ); } |
---|
2929 | ; |
---|
2930 | |
---|
2931 | abstract_parameter_ptr: |
---|
2932 | ptrref_operator |
---|
2933 | { $$ = DeclarationNode::newPointer( nullptr, $1 ); } |
---|
2934 | | ptrref_operator type_qualifier_list |
---|
2935 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
---|
2936 | | ptrref_operator abstract_parameter_declarator |
---|
2937 | { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); } |
---|
2938 | | ptrref_operator type_qualifier_list abstract_parameter_declarator |
---|
2939 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
2940 | | '(' abstract_parameter_ptr ')' attribute_list_opt |
---|
2941 | { $$ = $2->addQualifiers( $4 ); } |
---|
2942 | ; |
---|
2943 | |
---|
2944 | abstract_parameter_array: |
---|
2945 | array_parameter_dimension |
---|
2946 | | '(' abstract_parameter_ptr ')' array_parameter_dimension |
---|
2947 | { $$ = $2->addArray( $4 ); } |
---|
2948 | | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis |
---|
2949 | { $$ = $2->addArray( $4 ); } |
---|
2950 | | '(' abstract_parameter_array ')' // redundant parenthesis |
---|
2951 | { $$ = $2; } |
---|
2952 | ; |
---|
2953 | |
---|
2954 | abstract_parameter_function: |
---|
2955 | '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2956 | { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); } |
---|
2957 | | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
2958 | { $$ = $2->addParamList( $6 ); } |
---|
2959 | | '(' abstract_parameter_function ')' // redundant parenthesis |
---|
2960 | { $$ = $2; } |
---|
2961 | ; |
---|
2962 | |
---|
2963 | array_parameter_dimension: |
---|
2964 | // Only the first dimension can be empty or have qualifiers. |
---|
2965 | array_parameter_1st_dimension |
---|
2966 | | array_parameter_1st_dimension multi_array_dimension |
---|
2967 | { $$ = $1->addArray( $2 ); } |
---|
2968 | | multi_array_dimension |
---|
2969 | ; |
---|
2970 | |
---|
2971 | // The declaration of an array parameter has additional syntax over arrays in normal variable declarations: |
---|
2972 | // |
---|
2973 | // ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in |
---|
2974 | // a declaration of a function parameter with an array type, and then only in the outermost array type derivation." |
---|
2975 | |
---|
2976 | array_parameter_1st_dimension: |
---|
2977 | '[' ']' |
---|
2978 | { $$ = DeclarationNode::newArray( 0, 0, false ); } |
---|
2979 | // multi_array_dimension handles the '[' '*' ']' case |
---|
2980 | | '[' push type_qualifier_list '*' pop ']' // remaining C99 |
---|
2981 | { $$ = DeclarationNode::newVarArray( $3 ); } |
---|
2982 | | '[' push type_qualifier_list pop ']' |
---|
2983 | { $$ = DeclarationNode::newArray( 0, $3, false ); } |
---|
2984 | // multi_array_dimension handles the '[' assignment_expression ']' case |
---|
2985 | | '[' push type_qualifier_list assignment_expression pop ']' |
---|
2986 | { $$ = DeclarationNode::newArray( $4, $3, false ); } |
---|
2987 | | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']' |
---|
2988 | { $$ = DeclarationNode::newArray( $5, $4, true ); } |
---|
2989 | | '[' push type_qualifier_list STATIC assignment_expression pop ']' |
---|
2990 | { $$ = DeclarationNode::newArray( $5, $3, true ); } |
---|
2991 | ; |
---|
2992 | |
---|
2993 | // This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer. |
---|
2994 | // |
---|
2995 | // struct S { |
---|
2996 | // int; |
---|
2997 | // int *; |
---|
2998 | // int [10]; |
---|
2999 | // int (*)(); |
---|
3000 | // }; |
---|
3001 | |
---|
3002 | variable_abstract_declarator: |
---|
3003 | variable_abstract_ptr |
---|
3004 | | variable_abstract_array attribute_list_opt |
---|
3005 | { $$ = $1->addQualifiers( $2 ); } |
---|
3006 | | variable_abstract_function attribute_list_opt |
---|
3007 | { $$ = $1->addQualifiers( $2 ); } |
---|
3008 | ; |
---|
3009 | |
---|
3010 | variable_abstract_ptr: |
---|
3011 | ptrref_operator |
---|
3012 | { $$ = DeclarationNode::newPointer( 0, $1 ); } |
---|
3013 | | ptrref_operator type_qualifier_list |
---|
3014 | { $$ = DeclarationNode::newPointer( $2, $1 ); } |
---|
3015 | | ptrref_operator variable_abstract_declarator |
---|
3016 | { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3017 | | ptrref_operator type_qualifier_list variable_abstract_declarator |
---|
3018 | { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); } |
---|
3019 | | '(' variable_abstract_ptr ')' attribute_list_opt |
---|
3020 | { $$ = $2->addQualifiers( $4 ); } |
---|
3021 | ; |
---|
3022 | |
---|
3023 | variable_abstract_array: |
---|
3024 | array_dimension |
---|
3025 | | '(' variable_abstract_ptr ')' array_dimension |
---|
3026 | { $$ = $2->addArray( $4 ); } |
---|
3027 | | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis |
---|
3028 | { $$ = $2->addArray( $4 ); } |
---|
3029 | | '(' variable_abstract_array ')' // redundant parenthesis |
---|
3030 | { $$ = $2; } |
---|
3031 | ; |
---|
3032 | |
---|
3033 | variable_abstract_function: |
---|
3034 | '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3) |
---|
3035 | { $$ = $2->addParamList( $6 ); } |
---|
3036 | | '(' variable_abstract_function ')' // redundant parenthesis |
---|
3037 | { $$ = $2; } |
---|
3038 | ; |
---|
3039 | |
---|
3040 | // This pattern parses a new-style declaration for a parameter variable or function prototype that is either an |
---|
3041 | // identifier or typedef name and allows the C99 array options, which can only appear in a parameter list. |
---|
3042 | |
---|
3043 | cfa_identifier_parameter_declarator_tuple: // CFA |
---|
3044 | cfa_identifier_parameter_declarator_no_tuple |
---|
3045 | | cfa_abstract_tuple |
---|
3046 | | type_qualifier_list cfa_abstract_tuple |
---|
3047 | { $$ = $2->addQualifiers( $1 ); } |
---|
3048 | ; |
---|
3049 | |
---|
3050 | cfa_identifier_parameter_declarator_no_tuple: // CFA |
---|
3051 | cfa_identifier_parameter_ptr |
---|
3052 | | cfa_identifier_parameter_array |
---|
3053 | ; |
---|
3054 | |
---|
3055 | cfa_identifier_parameter_ptr: // CFA |
---|
3056 | // No SUE declaration in parameter list. |
---|
3057 | ptrref_operator type_specifier_nobody |
---|
3058 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3059 | | type_qualifier_list ptrref_operator type_specifier_nobody |
---|
3060 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3061 | | ptrref_operator cfa_abstract_function |
---|
3062 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3063 | | type_qualifier_list ptrref_operator cfa_abstract_function |
---|
3064 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3065 | | ptrref_operator cfa_identifier_parameter_declarator_tuple |
---|
3066 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3067 | | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple |
---|
3068 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3069 | ; |
---|
3070 | |
---|
3071 | cfa_identifier_parameter_array: // CFA |
---|
3072 | // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to |
---|
3073 | // shift/reduce conflict with new-style empty (void) function return type. |
---|
3074 | '[' ']' type_specifier_nobody |
---|
3075 | { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
---|
3076 | | cfa_array_parameter_1st_dimension type_specifier_nobody |
---|
3077 | { $$ = $2->addNewArray( $1 ); } |
---|
3078 | | '[' ']' multi_array_dimension type_specifier_nobody |
---|
3079 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
---|
3080 | | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody |
---|
3081 | { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); } |
---|
3082 | | multi_array_dimension type_specifier_nobody |
---|
3083 | { $$ = $2->addNewArray( $1 ); } |
---|
3084 | |
---|
3085 | | '[' ']' cfa_identifier_parameter_ptr |
---|
3086 | { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
---|
3087 | | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr |
---|
3088 | { $$ = $2->addNewArray( $1 ); } |
---|
3089 | | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr |
---|
3090 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); } |
---|
3091 | | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr |
---|
3092 | { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); } |
---|
3093 | | multi_array_dimension cfa_identifier_parameter_ptr |
---|
3094 | { $$ = $2->addNewArray( $1 ); } |
---|
3095 | ; |
---|
3096 | |
---|
3097 | cfa_array_parameter_1st_dimension: |
---|
3098 | '[' push type_qualifier_list '*' pop ']' // remaining C99 |
---|
3099 | { $$ = DeclarationNode::newVarArray( $3 ); } |
---|
3100 | | '[' push type_qualifier_list assignment_expression pop ']' |
---|
3101 | { $$ = DeclarationNode::newArray( $4, $3, false ); } |
---|
3102 | | '[' push declaration_qualifier_list assignment_expression pop ']' |
---|
3103 | // declaration_qualifier_list must be used because of shift/reduce conflict with |
---|
3104 | // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot |
---|
3105 | // appear in this context. |
---|
3106 | { $$ = DeclarationNode::newArray( $4, $3, true ); } |
---|
3107 | | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']' |
---|
3108 | { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); } |
---|
3109 | ; |
---|
3110 | |
---|
3111 | // This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no |
---|
3112 | // identifier to which the type applies, e.g.: |
---|
3113 | // |
---|
3114 | // [int] f( int ); // abstract variable parameter; no parameter name specified |
---|
3115 | // [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified |
---|
3116 | // |
---|
3117 | // These rules need LR(3): |
---|
3118 | // |
---|
3119 | // cfa_abstract_tuple identifier_or_type_name |
---|
3120 | // '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')' |
---|
3121 | // |
---|
3122 | // since a function return type can be syntactically identical to a tuple type: |
---|
3123 | // |
---|
3124 | // [int, int] t; |
---|
3125 | // [int, int] f( int ); |
---|
3126 | // |
---|
3127 | // Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce |
---|
3128 | // cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary |
---|
3129 | // lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are |
---|
3130 | // duplicated when appearing with cfa_function_specifier. |
---|
3131 | |
---|
3132 | cfa_abstract_declarator_tuple: // CFA |
---|
3133 | cfa_abstract_tuple |
---|
3134 | | type_qualifier_list cfa_abstract_tuple |
---|
3135 | { $$ = $2->addQualifiers( $1 ); } |
---|
3136 | | cfa_abstract_declarator_no_tuple |
---|
3137 | ; |
---|
3138 | |
---|
3139 | cfa_abstract_declarator_no_tuple: // CFA |
---|
3140 | cfa_abstract_ptr |
---|
3141 | | cfa_abstract_array |
---|
3142 | ; |
---|
3143 | |
---|
3144 | cfa_abstract_ptr: // CFA |
---|
3145 | ptrref_operator type_specifier |
---|
3146 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3147 | | type_qualifier_list ptrref_operator type_specifier |
---|
3148 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3149 | | ptrref_operator cfa_abstract_function |
---|
3150 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3151 | | type_qualifier_list ptrref_operator cfa_abstract_function |
---|
3152 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3153 | | ptrref_operator cfa_abstract_declarator_tuple |
---|
3154 | { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); } |
---|
3155 | | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple |
---|
3156 | { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); } |
---|
3157 | ; |
---|
3158 | |
---|
3159 | cfa_abstract_array: // CFA |
---|
3160 | // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with |
---|
3161 | // empty (void) function return type. |
---|
3162 | '[' ']' type_specifier |
---|
3163 | { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
---|
3164 | | '[' ']' multi_array_dimension type_specifier |
---|
3165 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
---|
3166 | | multi_array_dimension type_specifier |
---|
3167 | { $$ = $2->addNewArray( $1 ); } |
---|
3168 | | '[' ']' cfa_abstract_ptr |
---|
3169 | { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
---|
3170 | | '[' ']' multi_array_dimension cfa_abstract_ptr |
---|
3171 | { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); } |
---|
3172 | | multi_array_dimension cfa_abstract_ptr |
---|
3173 | { $$ = $2->addNewArray( $1 ); } |
---|
3174 | ; |
---|
3175 | |
---|
3176 | cfa_abstract_tuple: // CFA |
---|
3177 | '[' push cfa_abstract_parameter_list pop ']' |
---|
3178 | { $$ = DeclarationNode::newTuple( $3 ); } |
---|
3179 | ; |
---|
3180 | |
---|
3181 | cfa_abstract_function: // CFA |
---|
3182 | // '[' ']' '(' cfa_parameter_type_list_opt ')' |
---|
3183 | // { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); } |
---|
3184 | cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')' |
---|
3185 | { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); } |
---|
3186 | | cfa_function_return '(' push cfa_parameter_type_list_opt pop ')' |
---|
3187 | { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); } |
---|
3188 | ; |
---|
3189 | |
---|
3190 | // 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in |
---|
3191 | // each declaration, and in the specifier-qualifier list in each structure declaration and type name." |
---|
3192 | // |
---|
3193 | // 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of |
---|
3194 | // the declaration specifiers in a declaration is an obsolescent feature." |
---|
3195 | // |
---|
3196 | // 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not |
---|
3197 | // prototype-format parameter type declarators) is an obsolescent feature." |
---|
3198 | // |
---|
3199 | // 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and |
---|
3200 | // declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature. |
---|
3201 | |
---|
3202 | //************************* MISCELLANEOUS ******************************** |
---|
3203 | |
---|
3204 | comma_opt: // redundant comma |
---|
3205 | // empty |
---|
3206 | | ',' |
---|
3207 | ; |
---|
3208 | |
---|
3209 | default_initialize_opt: |
---|
3210 | // empty |
---|
3211 | { $$ = nullptr; } |
---|
3212 | | '=' assignment_expression |
---|
3213 | { $$ = $2; } |
---|
3214 | ; |
---|
3215 | |
---|
3216 | %% |
---|
3217 | // ----end of grammar---- |
---|
3218 | |
---|
3219 | // Local Variables: // |
---|
3220 | // mode: c++ // |
---|
3221 | // tab-width: 4 // |
---|
3222 | // compile-command: "make install" // |
---|
3223 | // End: // |
---|