Mercurial > projects > ldc
annotate dmd2/enum.c @ 783:d268bf419a09
hgignore updates for CMake.
author | Christian Kamm <kamm incasoftware de> |
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date | Sat, 22 Nov 2008 21:11:26 +0100 |
parents | f04dde6e882c |
children | 638d16625da2 |
rev | line source |
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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 sinit = NULL; |
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34 scope = NULL; |
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35 isdeprecated = 0; |
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36 } |
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37 |
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38 Dsymbol *EnumDeclaration::syntaxCopy(Dsymbol *s) |
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39 { |
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40 Type *t = NULL; |
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41 if (memtype) |
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42 t = memtype->syntaxCopy(); |
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43 |
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44 EnumDeclaration *ed; |
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45 if (s) |
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46 { ed = (EnumDeclaration *)s; |
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47 ed->memtype = t; |
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48 } |
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49 else |
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50 ed = new EnumDeclaration(loc, ident, t); |
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51 ScopeDsymbol::syntaxCopy(ed); |
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52 return ed; |
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53 } |
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54 |
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55 void EnumDeclaration::semantic(Scope *sc) |
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56 { |
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57 Type *t; |
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58 Scope *sce; |
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59 |
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60 //printf("EnumDeclaration::semantic(sd = %p, '%s') %s\n", sc->scopesym, sc->scopesym->toChars(), toChars()); |
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61 //printf("EnumDeclaration::semantic() %s\n", toChars()); |
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62 if (!members) // enum ident; |
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63 return; |
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64 |
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65 if (!memtype && !isAnonymous()) |
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66 { // Set memtype if we can to reduce fwd reference errors |
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67 memtype = Type::tint32; // case 1) enum ident { ... } |
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68 } |
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69 |
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70 if (symtab) // if already done |
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71 { if (!scope) |
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72 return; // semantic() already completed |
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73 } |
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74 else |
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75 symtab = new DsymbolTable(); |
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76 |
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77 Scope *scx = NULL; |
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78 if (scope) |
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79 { sc = scope; |
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80 scx = scope; // save so we don't make redundant copies |
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81 scope = NULL; |
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82 } |
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83 |
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84 if (sc->stc & STCdeprecated) |
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85 isdeprecated = 1; |
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86 |
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87 parent = sc->parent; |
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88 |
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89 /* The separate, and distinct, cases are: |
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90 * 1. enum { ... } |
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91 * 2. enum : memtype { ... } |
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92 * 3. enum ident { ... } |
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93 * 4. enum ident : memtype { ... } |
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94 */ |
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95 |
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96 if (memtype) |
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97 { |
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98 memtype = memtype->semantic(loc, sc); |
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99 |
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100 /* Check to see if memtype is forward referenced |
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101 */ |
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102 if (memtype->ty == Tenum) |
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103 { EnumDeclaration *sym = (EnumDeclaration *)memtype->toDsymbol(sc); |
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104 if (!sym->memtype || !sym->members || !sym->symtab || sym->scope) |
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105 { // memtype is forward referenced, so try again later |
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106 scope = scx ? scx : new Scope(*sc); |
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107 scope->setNoFree(); |
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108 scope->module->addDeferredSemantic(this); |
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109 printf("\tdeferring %s\n", toChars()); |
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110 return; |
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111 } |
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112 } |
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113 #if 0 // Decided to abandon this restriction for D 2.0 |
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114 if (!memtype->isintegral()) |
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115 { error("base type must be of integral type, not %s", memtype->toChars()); |
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116 memtype = Type::tint32; |
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117 } |
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118 #endif |
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119 } |
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120 |
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121 type = type->semantic(loc, sc); |
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122 if (isAnonymous()) |
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123 sce = sc; |
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124 else |
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125 { sce = sc->push(this); |
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126 sce->parent = this; |
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127 } |
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128 if (members->dim == 0) |
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129 error("enum %s must have at least one member", toChars()); |
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130 int first = 1; |
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131 Expression *elast = NULL; |
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132 for (int i = 0; i < members->dim; i++) |
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133 { |
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134 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember(); |
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135 Expression *e; |
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136 |
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137 if (!em) |
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138 /* The e->semantic(sce) can insert other symbols, such as |
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139 * template instances and function literals. |
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140 */ |
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141 continue; |
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142 |
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143 //printf(" Enum member '%s'\n",em->toChars()); |
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144 if (em->type) |
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145 em->type = em->type->semantic(em->loc, sce); |
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146 e = em->value; |
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147 if (e) |
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148 { |
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149 assert(e->dyncast() == DYNCAST_EXPRESSION); |
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150 e = e->semantic(sce); |
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151 e = e->optimize(WANTvalue | WANTinterpret); |
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152 if (memtype) |
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153 { |
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154 e = e->implicitCastTo(sce, memtype); |
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155 e = e->optimize(WANTvalue | WANTinterpret); |
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156 if (!isAnonymous()) |
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157 e = e->castTo(sce, type); |
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158 t = memtype; |
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159 } |
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160 else if (em->type) |
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161 { |
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162 e = e->implicitCastTo(sce, em->type); |
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163 e = e->optimize(WANTvalue | WANTinterpret); |
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164 assert(isAnonymous()); |
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165 t = e->type; |
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166 } |
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167 else |
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168 t = e->type; |
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169 } |
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170 else if (first) |
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171 { |
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172 if (memtype) |
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173 t = memtype; |
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174 else if (em->type) |
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175 t = em->type; |
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176 else |
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177 t = Type::tint32; |
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178 e = new IntegerExp(em->loc, 0, Type::tint32); |
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179 e = e->implicitCastTo(sce, t); |
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180 e = e->optimize(WANTvalue | WANTinterpret); |
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181 if (!isAnonymous()) |
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182 e = e->castTo(sce, type); |
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183 } |
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184 else |
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185 { |
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186 // Set value to (elast + 1). |
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187 // But first check that (elast != t.max) |
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188 assert(elast); |
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189 e = new EqualExp(TOKequal, em->loc, elast, t->getProperty(0, Id::max)); |
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190 e = e->semantic(sce); |
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191 e = e->optimize(WANTvalue | WANTinterpret); |
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192 if (e->toInteger()) |
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193 error("overflow of enum value %s", elast->toChars()); |
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194 |
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195 // Now set e to (elast + 1) |
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196 e = new AddExp(em->loc, elast, new IntegerExp(em->loc, 1, Type::tint32)); |
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197 e = e->semantic(sce); |
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198 e = e->castTo(sce, elast->type); |
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199 e = e->optimize(WANTvalue | WANTinterpret); |
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200 } |
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201 elast = e; |
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202 em->value = e; |
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203 |
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204 // Add to symbol table only after evaluating 'value' |
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205 if (isAnonymous()) |
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206 { |
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207 /* Anonymous enum members get added to enclosing scope. |
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208 */ |
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209 for (Scope *scx = sce; scx; scx = scx->enclosing) |
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210 { |
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211 if (scx->scopesym) |
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212 { |
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213 if (!scx->scopesym->symtab) |
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214 scx->scopesym->symtab = new DsymbolTable(); |
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215 em->addMember(sce, scx->scopesym, 1); |
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216 break; |
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217 } |
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218 } |
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219 } |
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220 else |
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221 em->addMember(sc, this, 1); |
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222 |
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223 /* Compute .min, .max and .default values. |
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224 * If enum doesn't have a name, we can never identify the enum type, |
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225 * so there is no purpose for a .min, .max or .default |
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226 */ |
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227 if (!isAnonymous()) |
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228 { |
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229 if (first) |
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230 { defaultval = e; |
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231 minval = e; |
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232 maxval = e; |
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233 } |
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234 else |
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235 { Expression *ec; |
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236 |
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237 /* In order to work successfully with UDTs, |
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238 * build expressions to do the comparisons, |
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239 * and let the semantic analyzer and constant |
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240 * folder give us the result. |
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241 */ |
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242 |
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243 // Compute if(e < minval) |
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244 ec = new CmpExp(TOKlt, em->loc, e, minval); |
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245 ec = ec->semantic(sce); |
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246 ec = ec->optimize(WANTvalue | WANTinterpret); |
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247 if (ec->toInteger()) |
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248 minval = e; |
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249 |
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250 ec = new CmpExp(TOKgt, em->loc, e, maxval); |
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251 ec = ec->semantic(sce); |
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252 ec = ec->optimize(WANTvalue | WANTinterpret); |
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253 if (ec->toInteger()) |
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254 maxval = e; |
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255 } |
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256 } |
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257 first = 0; |
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258 } |
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259 //printf("defaultval = %lld\n", defaultval); |
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260 |
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261 //if (defaultval) printf("defaultval: %s %s\n", defaultval->toChars(), defaultval->type->toChars()); |
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262 if (sc != sce) |
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263 sce->pop(); |
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264 //members->print(); |
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265 } |
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266 |
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267 int EnumDeclaration::oneMember(Dsymbol **ps) |
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268 { |
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269 if (isAnonymous()) |
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270 return Dsymbol::oneMembers(members, ps); |
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271 return Dsymbol::oneMember(ps); |
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272 } |
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273 |
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274 void EnumDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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275 { int i; |
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276 |
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277 buf->writestring("enum "); |
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278 if (ident) |
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279 { buf->writestring(ident->toChars()); |
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280 buf->writeByte(' '); |
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281 } |
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282 if (memtype) |
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283 { |
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284 buf->writestring(": "); |
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285 memtype->toCBuffer(buf, NULL, hgs); |
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286 } |
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287 if (!members) |
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288 { |
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289 buf->writeByte(';'); |
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290 buf->writenl(); |
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291 return; |
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292 } |
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293 buf->writenl(); |
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294 buf->writeByte('{'); |
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295 buf->writenl(); |
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296 for (i = 0; i < members->dim; i++) |
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297 { |
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298 EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember(); |
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299 if (!em) |
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300 continue; |
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301 //buf->writestring(" "); |
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302 em->toCBuffer(buf, hgs); |
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303 buf->writeByte(','); |
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304 buf->writenl(); |
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305 } |
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306 buf->writeByte('}'); |
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307 buf->writenl(); |
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308 } |
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309 |
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310 Type *EnumDeclaration::getType() |
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311 { |
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312 return type; |
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313 } |
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314 |
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315 const char *EnumDeclaration::kind() |
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316 { |
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317 return "enum"; |
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318 } |
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319 |
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320 int EnumDeclaration::isDeprecated() |
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321 { |
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322 return isdeprecated; |
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323 } |
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324 |
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325 Dsymbol *EnumDeclaration::search(Loc loc, Identifier *ident, int flags) |
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326 { |
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327 //printf("%s.EnumDeclaration::search('%s')\n", toChars(), ident->toChars()); |
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328 if (scope) |
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329 // Try one last time to resolve this enum |
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330 semantic(scope); |
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331 |
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332 if (!members || !symtab || scope) |
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333 { error("is forward referenced when looking for '%s'", ident->toChars()); |
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334 //*(char*)0=0; |
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335 return NULL; |
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336 } |
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337 |
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338 Dsymbol *s = ScopeDsymbol::search(loc, ident, flags); |
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339 return s; |
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340 } |
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341 |
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342 /********************************* EnumMember ****************************/ |
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343 |
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344 EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value, Type *type) |
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345 : Dsymbol(id) |
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346 { |
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347 this->value = value; |
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348 this->type = type; |
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349 this->loc = loc; |
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350 } |
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351 |
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352 Dsymbol *EnumMember::syntaxCopy(Dsymbol *s) |
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353 { |
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354 Expression *e = NULL; |
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355 if (value) |
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356 e = value->syntaxCopy(); |
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357 |
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358 Type *t = NULL; |
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359 if (type) |
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360 t = type->syntaxCopy(); |
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361 |
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362 EnumMember *em; |
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363 if (s) |
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364 { em = (EnumMember *)s; |
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365 em->loc = loc; |
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366 em->value = e; |
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367 em->type = t; |
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368 } |
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369 else |
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370 em = new EnumMember(loc, ident, e, t); |
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371 return em; |
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372 } |
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373 |
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374 void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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375 { |
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376 if (type) |
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377 type->toCBuffer(buf, ident, hgs); |
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378 else |
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379 buf->writestring(ident->toChars()); |
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380 if (value) |
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381 { |
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382 buf->writestring(" = "); |
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383 value->toCBuffer(buf, hgs); |
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384 } |
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385 } |
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386 |
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387 const char *EnumMember::kind() |
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388 { |
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389 return "enum member"; |
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390 } |
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391 |
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392 |