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annotate dmd2/enum.c @ 1558:3adcb70700cb
Added back option to disable metadata generation and users. Set USE_METADATA to OFF in ccmake.
author | Tomas Lindquist Olsen <tomas.l.olsen gmail com> |
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date | Fri, 31 Jul 2009 11:28:31 +0200 |
parents | 54b3c1394d62 |
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1 |
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2 // Copyright (c) 1999-2008 by Digital Mars |
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3 // All Rights Reserved |
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4 // written by Walter Bright |
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5 // http://www.digitalmars.com |
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6 // License for redistribution is by either the Artistic License |
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7 // in artistic.txt, or the GNU General Public License in gnu.txt. |
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8 // See the included readme.txt for details. |
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9 |
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10 #include <stdio.h> |
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11 #include <assert.h> |
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12 |
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13 #include "root.h" |
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14 #include "enum.h" |
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15 #include "mtype.h" |
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16 #include "scope.h" |
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17 #include "id.h" |
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18 #include "expression.h" |
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19 #include "module.h" |
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20 #include "declaration.h" |
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21 |
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22 /********************************* EnumDeclaration ****************************/ |
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23 |
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24 EnumDeclaration::EnumDeclaration(Loc loc, Identifier *id, Type *memtype) |
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25 : ScopeDsymbol(id) |
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26 { |
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27 this->loc = loc; |
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28 type = new TypeEnum(this); |
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29 this->memtype = memtype; |
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30 maxval = NULL; |
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31 minval = NULL; |
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32 defaultval = NULL; |
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33 #if IN_DMD |
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34 sinit = NULL; |
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35 #endif |
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36 isdeprecated = 0; |
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37 } |
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38 |
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39 Dsymbol *EnumDeclaration::syntaxCopy(Dsymbol *s) |
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40 { |
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41 Type *t = NULL; |
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42 if (memtype) |
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43 t = memtype->syntaxCopy(); |
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44 |
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45 EnumDeclaration *ed; |
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46 if (s) |
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47 { ed = (EnumDeclaration *)s; |
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48 ed->memtype = t; |
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49 } |
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50 else |
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51 ed = new EnumDeclaration(loc, ident, t); |
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52 ScopeDsymbol::syntaxCopy(ed); |
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53 return ed; |
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54 } |
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55 |
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56 void EnumDeclaration::semantic(Scope *sc) |
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57 { |
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58 Type *t; |
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59 Scope *sce; |
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60 |
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61 //printf("EnumDeclaration::semantic(sd = %p, '%s') %s\n", sc->scopesym, sc->scopesym->toChars(), toChars()); |
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62 //printf("EnumDeclaration::semantic() %s\n", toChars()); |
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63 if (!members) // enum ident; |
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64 return; |
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65 |
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66 if (!memtype && !isAnonymous()) |
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67 { // Set memtype if we can to reduce fwd reference errors |
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68 memtype = Type::tint32; // case 1) enum ident { ... } |
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69 } |
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70 |
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71 if (symtab) // if already done |
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72 { if (!scope) |
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73 return; // semantic() already completed |
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74 } |
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75 else |
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76 symtab = new DsymbolTable(); |
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77 |
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78 Scope *scx = NULL; |
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79 if (scope) |
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80 { sc = scope; |
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81 scx = scope; // save so we don't make redundant copies |
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82 scope = NULL; |
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83 } |
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84 |
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85 if (sc->stc & STCdeprecated) |
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86 isdeprecated = 1; |
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87 |
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88 parent = sc->parent; |
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89 |
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90 /* The separate, and distinct, cases are: |
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91 * 1. enum { ... } |
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92 * 2. enum : memtype { ... } |
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93 * 3. enum ident { ... } |
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94 * 4. enum ident : memtype { ... } |
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95 */ |
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96 |
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97 if (memtype) |
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98 { |
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99 memtype = memtype->semantic(loc, sc); |
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100 |
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101 /* Check to see if memtype is forward referenced |
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102 */ |
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103 if (memtype->ty == Tenum) |
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104 { EnumDeclaration *sym = (EnumDeclaration *)memtype->toDsymbol(sc); |
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105 if (!sym->memtype || !sym->members || !sym->symtab || sym->scope) |
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106 { // memtype is forward referenced, so try again later |
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107 scope = scx ? scx : new Scope(*sc); |
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108 scope->setNoFree(); |
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109 scope->module->addDeferredSemantic(this); |
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110 printf("\tdeferring %s\n", toChars()); |
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111 return; |
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112 } |
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113 } |
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114 #if 0 // Decided to abandon this restriction for D 2.0 |
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115 if (!memtype->isintegral()) |
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116 { error("base type must be of integral type, not %s", memtype->toChars()); |
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117 memtype = Type::tint32; |
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118 } |
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119 #endif |
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120 } |
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121 |
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122 type = type->semantic(loc, sc); |
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123 if (isAnonymous()) |
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124 sce = sc; |
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125 else |
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126 { sce = sc->push(this); |
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127 sce->parent = this; |
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128 } |
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129 if (members->dim == 0) |
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130 error("enum %s must have at least one member", toChars()); |
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131 int first = 1; |
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132 Expression *elast = NULL; |
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133 for (int i = 0; i < members->dim; i++) |
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134 { |
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135 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember(); |
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136 Expression *e; |
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137 |
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138 if (!em) |
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139 /* The e->semantic(sce) can insert other symbols, such as |
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140 * template instances and function literals. |
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141 */ |
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142 continue; |
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143 |
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144 //printf(" Enum member '%s'\n",em->toChars()); |
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145 if (em->type) |
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146 em->type = em->type->semantic(em->loc, sce); |
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147 e = em->value; |
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148 if (e) |
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149 { |
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150 assert(e->dyncast() == DYNCAST_EXPRESSION); |
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151 e = e->semantic(sce); |
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152 e = e->optimize(WANTvalue | WANTinterpret); |
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153 if (memtype) |
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154 { |
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155 e = e->implicitCastTo(sce, memtype); |
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156 e = e->optimize(WANTvalue | WANTinterpret); |
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157 if (!isAnonymous()) |
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158 e = e->castTo(sce, type); |
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159 t = memtype; |
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160 } |
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161 else if (em->type) |
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162 { |
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163 e = e->implicitCastTo(sce, em->type); |
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164 e = e->optimize(WANTvalue | WANTinterpret); |
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165 assert(isAnonymous()); |
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166 t = e->type; |
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167 } |
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168 else |
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169 t = e->type; |
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170 } |
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171 else if (first) |
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172 { |
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173 if (memtype) |
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174 t = memtype; |
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175 else if (em->type) |
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176 t = em->type; |
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177 else |
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178 t = Type::tint32; |
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179 e = new IntegerExp(em->loc, 0, Type::tint32); |
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180 e = e->implicitCastTo(sce, t); |
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181 e = e->optimize(WANTvalue | WANTinterpret); |
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182 if (!isAnonymous()) |
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183 e = e->castTo(sce, type); |
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184 } |
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185 else |
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186 { |
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187 // Set value to (elast + 1). |
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188 // But first check that (elast != t.max) |
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189 assert(elast); |
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190 e = new EqualExp(TOKequal, em->loc, elast, t->getProperty(0, Id::max)); |
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191 e = e->semantic(sce); |
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192 e = e->optimize(WANTvalue | WANTinterpret); |
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193 if (e->toInteger()) |
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194 error("overflow of enum value %s", elast->toChars()); |
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195 |
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196 // Now set e to (elast + 1) |
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197 e = new AddExp(em->loc, elast, new IntegerExp(em->loc, 1, Type::tint32)); |
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198 e = e->semantic(sce); |
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199 e = e->castTo(sce, elast->type); |
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200 e = e->optimize(WANTvalue | WANTinterpret); |
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201 } |
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202 elast = e; |
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203 em->value = e; |
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204 |
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205 // Add to symbol table only after evaluating 'value' |
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206 if (isAnonymous()) |
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207 { |
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208 /* Anonymous enum members get added to enclosing scope. |
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209 */ |
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210 for (Scope *scx = sce; scx; scx = scx->enclosing) |
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211 { |
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212 if (scx->scopesym) |
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213 { |
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214 if (!scx->scopesym->symtab) |
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215 scx->scopesym->symtab = new DsymbolTable(); |
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216 em->addMember(sce, scx->scopesym, 1); |
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217 break; |
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218 } |
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219 } |
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220 } |
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221 else |
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222 em->addMember(sc, this, 1); |
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223 |
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224 /* Compute .min, .max and .default values. |
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225 * If enum doesn't have a name, we can never identify the enum type, |
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226 * so there is no purpose for a .min, .max or .default |
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227 */ |
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228 if (!isAnonymous()) |
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229 { |
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230 if (first) |
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231 { defaultval = e; |
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232 minval = e; |
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233 maxval = e; |
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234 } |
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235 else |
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236 { Expression *ec; |
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237 |
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238 /* In order to work successfully with UDTs, |
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239 * build expressions to do the comparisons, |
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240 * and let the semantic analyzer and constant |
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241 * folder give us the result. |
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242 */ |
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243 |
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244 // Compute if(e < minval) |
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245 ec = new CmpExp(TOKlt, em->loc, e, minval); |
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246 ec = ec->semantic(sce); |
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247 ec = ec->optimize(WANTvalue | WANTinterpret); |
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248 if (ec->toInteger()) |
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249 minval = e; |
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250 |
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251 ec = new CmpExp(TOKgt, em->loc, e, maxval); |
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252 ec = ec->semantic(sce); |
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253 ec = ec->optimize(WANTvalue | WANTinterpret); |
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254 if (ec->toInteger()) |
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255 maxval = e; |
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256 } |
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257 } |
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258 first = 0; |
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259 } |
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260 //printf("defaultval = %lld\n", defaultval); |
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261 |
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262 //if (defaultval) printf("defaultval: %s %s\n", defaultval->toChars(), defaultval->type->toChars()); |
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263 if (sc != sce) |
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264 sce->pop(); |
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265 //members->print(); |
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266 } |
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267 |
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268 int EnumDeclaration::oneMember(Dsymbol **ps) |
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269 { |
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270 if (isAnonymous()) |
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271 return Dsymbol::oneMembers(members, ps); |
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272 return Dsymbol::oneMember(ps); |
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273 } |
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274 |
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275 void EnumDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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276 { int i; |
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277 |
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278 buf->writestring("enum "); |
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279 if (ident) |
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280 { buf->writestring(ident->toChars()); |
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281 buf->writeByte(' '); |
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282 } |
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283 if (memtype) |
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284 { |
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285 buf->writestring(": "); |
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286 memtype->toCBuffer(buf, NULL, hgs); |
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287 } |
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288 if (!members) |
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289 { |
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290 buf->writeByte(';'); |
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291 buf->writenl(); |
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292 return; |
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293 } |
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294 buf->writenl(); |
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295 buf->writeByte('{'); |
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296 buf->writenl(); |
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297 for (i = 0; i < members->dim; i++) |
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298 { |
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299 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember(); |
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300 if (!em) |
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301 continue; |
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302 //buf->writestring(" "); |
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303 em->toCBuffer(buf, hgs); |
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304 buf->writeByte(','); |
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305 buf->writenl(); |
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306 } |
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307 buf->writeByte('}'); |
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308 buf->writenl(); |
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309 } |
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310 |
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311 Type *EnumDeclaration::getType() |
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312 { |
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313 return type; |
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314 } |
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315 |
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316 const char *EnumDeclaration::kind() |
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317 { |
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318 return "enum"; |
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319 } |
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320 |
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321 int EnumDeclaration::isDeprecated() |
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322 { |
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323 return isdeprecated; |
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324 } |
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325 |
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326 Dsymbol *EnumDeclaration::search(Loc loc, Identifier *ident, int flags) |
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327 { |
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328 //printf("%s.EnumDeclaration::search('%s')\n", toChars(), ident->toChars()); |
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329 if (scope) |
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330 // Try one last time to resolve this enum |
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331 semantic(scope); |
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332 |
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333 if (!members || !symtab || scope) |
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334 { error("is forward referenced when looking for '%s'", ident->toChars()); |
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335 //*(char*)0=0; |
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336 return NULL; |
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337 } |
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338 |
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339 Dsymbol *s = ScopeDsymbol::search(loc, ident, flags); |
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340 return s; |
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341 } |
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342 |
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343 /********************************* EnumMember ****************************/ |
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344 |
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345 EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value, Type *type) |
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346 : Dsymbol(id) |
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347 { |
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348 this->value = value; |
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349 this->type = type; |
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350 this->loc = loc; |
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351 } |
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352 |
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353 Dsymbol *EnumMember::syntaxCopy(Dsymbol *s) |
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354 { |
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355 Expression *e = NULL; |
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356 if (value) |
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357 e = value->syntaxCopy(); |
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358 |
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359 Type *t = NULL; |
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360 if (type) |
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361 t = type->syntaxCopy(); |
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362 |
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363 EnumMember *em; |
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364 if (s) |
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365 { em = (EnumMember *)s; |
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366 em->loc = loc; |
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367 em->value = e; |
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368 em->type = t; |
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369 } |
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370 else |
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371 em = new EnumMember(loc, ident, e, t); |
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372 return em; |
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373 } |
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374 |
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375 void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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376 { |
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377 if (type) |
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378 type->toCBuffer(buf, ident, hgs); |
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379 else |
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380 buf->writestring(ident->toChars()); |
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381 if (value) |
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382 { |
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383 buf->writestring(" = "); |
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384 value->toCBuffer(buf, hgs); |
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385 } |
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386 } |
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387 |
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388 const char *EnumMember::kind() |
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389 { |
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390 return "enum member"; |
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391 } |
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392 |
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393 |