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annotate dmd2/enum.c @ 1650:40bd4a0d4870

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Update to work with LLVM 2.7. Removed use of dyn_cast, llvm no compiles without exceptions and rtti by default. We do need exceptions for the libconfig stuff, but rtti isn't necessary (anymore). Debug info needs to be rewritten, as in LLVM 2.7 the format has completely changed. To have something to look at while rewriting, the old code has been wrapped inside #ifndef DISABLE_DEBUG_INFO , this means that you have to define this to compile at the moment. Updated tango 0.99.9 patch to include updated EH runtime code, which is needed for LLVM 2.7 as well.
author Tomas Lindquist Olsen
date Wed, 19 May 2010 12:42:32 +0200
parents 54b3c1394d62
children
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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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diff changeset
222 em->addMember(sc, this, 1);
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223
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diff changeset
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