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annotate dmd/DsymbolExp.d @ 130:60bb0fe4563e

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dmdfe 2.037 first main iteration
author Eldar Insafutdinov <e.insafutdinov@gmail.com>
date Thu, 09 Sep 2010 22:51:44 +0100
parents e28b18c23469
children e3afd1303184
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1 module dmd.DsymbolExp;
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2
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3 import dmd.common;
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4 import dmd.Expression;
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5 import dmd.OutBuffer;
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6 import dmd.EnumMember;
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7 import dmd.VarDeclaration;
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8 import dmd.FuncDeclaration;
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9 import dmd.FuncLiteralDeclaration;
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10 import dmd.OverloadSet;
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11 import dmd.Declaration;
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12 import dmd.ClassDeclaration;
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13 import dmd.Import;
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14 import dmd.Package;
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15 import dmd.Type;
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16 import dmd.DotVarExp;
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17 import dmd.ThisExp;
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18 import dmd.VarExp;
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19 import dmd.FuncExp;
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20 import dmd.OverExp;
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21 import dmd.DotTypeExp;
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22 import dmd.STC;
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23 import dmd.ScopeExp;
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24 import dmd.Module;
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25 import dmd.TypeExp;
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26 import dmd.TupleDeclaration;
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27 import dmd.TupleExp;
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28 import dmd.TemplateInstance;
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29 import dmd.Global;
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30 import dmd.TemplateDeclaration;
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31 import dmd.TemplateExp;
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32 import dmd.Loc;
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33 import dmd.Scope;
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34 import dmd.HdrGenState;
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35 import dmd.Dsymbol;
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36 import dmd.TOK;
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37 import dmd.ErrorExp;
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38
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39 class DsymbolExp : Expression
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40 {
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41 Dsymbol s;
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42 bool hasOverloads;
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43
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44 this(Loc loc, Dsymbol s, bool hasOverloads = false)
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45 {
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46 super(loc, TOK.TOKdsymbol, DsymbolExp.sizeof);
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47 this.s = s;
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48 this.hasOverloads = hasOverloads;
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49 }
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50
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51 override Expression semantic(Scope sc)
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52 {
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53 version (LOGSEMANTIC)
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54 {
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55 printf("DsymbolExp.semantic('%s')\n", s.toChars());
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56 }
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57
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58 Lagain:
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59 EnumMember em;
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60 Expression e;
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61 VarDeclaration v;
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62 FuncDeclaration f;
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63 FuncLiteralDeclaration fld;
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64 OverloadSet o;
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65 Declaration d;
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66 ClassDeclaration cd;
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67 ClassDeclaration thiscd = null;
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68 Import imp;
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69 Package pkg;
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70 Type t;
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71
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72 //printf("DsymbolExp. %p '%s' is a symbol\n", this, toChars());
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73 //printf("s = '%s', s.kind = '%s'\n", s.toChars(), s.kind());
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74 if (type)
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75 return this;
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76
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77 if (!s.isFuncDeclaration()) // functions are checked after overloading
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78 checkDeprecated(sc, s);
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79
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80 s = s.toAlias();
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81 //printf("s = '%s', s.kind = '%s', s.needThis() = %p\n", s.toChars(), s.kind(), s.needThis());
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82 if (!s.isFuncDeclaration())
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83 checkDeprecated(sc, s);
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84
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85 if (sc.func)
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86 thiscd = sc.func.parent.isClassDeclaration();
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87
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88 // BUG: This should happen after overload resolution for functions, not before
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89 if (s.needThis())
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90 {
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91 version (DMDV2) {
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92 bool cond = !s.isFuncDeclaration();
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93 } else {
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94 bool cond = true;
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95 }
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96 if (hasThis(sc) && cond)
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97 {
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98 // Supply an implicit 'this', as in
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99 // this.ident
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100 DotVarExp de = new DotVarExp(loc, new ThisExp(loc), s.isDeclaration());
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101 return de.semantic(sc);
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102 }
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103 }
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104
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105 em = s.isEnumMember();
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106 if (em)
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107 {
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108 e = em.value;
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109 e = e.semantic(sc);
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110 return e;
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111 }
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112 v = s.isVarDeclaration();
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113 if (v)
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114 {
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115 //printf("Identifier '%s' is a variable, type '%s'\n", toChars(), v.type.toChars());
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116 if (!type)
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117 {
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118 type = v.type;
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119 if (!v.type)
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120 {
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121 error("forward reference of %s %s", v.kind(), v.toChars());
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122 type = Type.terror;
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123 }
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124 }
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125
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126 if ((v.storage_class & STC.STCmanifest) && v.init)
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127 {
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128 e = v.init.toExpression();
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129 e.semantic(sc);
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130 return e;
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131 }
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132
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133 e = new VarExp(loc, v);
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134 e.type = type;
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135 e = e.semantic(sc);
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136 return e.deref();
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137 }
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138
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139 fld = s.isFuncLiteralDeclaration();
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140 if (fld)
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141 {
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142 //printf("'%s' is a function literal\n", fld.toChars());
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143 e = new FuncExp(loc, fld);
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144 return e.semantic(sc);
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145 }
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146 f = s.isFuncDeclaration();
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147 if (f)
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148 {
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149 //printf("'%s' is a function\n", f.toChars());
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150
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151 if (!f.type.deco)
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152 {
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153 error("forward reference to %s", toChars());
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154 return new ErrorExp();
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155 }
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156 return new VarExp(loc, f, hasOverloads);
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157 }
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158 o = s.isOverloadSet();
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159 if (o)
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160 {
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161 //printf("'%s' is an overload set\n", o.toChars());
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162 return new OverExp(o);
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163 }
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164 cd = s.isClassDeclaration();
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165 if (cd && thiscd && cd.isBaseOf(thiscd, null) && sc.func.needThis())
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166 {
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167 // We need to add an implicit 'this' if cd is this class or a base class.
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168 DotTypeExp dte = new DotTypeExp(loc, new ThisExp(loc), s);
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169 return dte.semantic(sc);
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170 }
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171 imp = s.isImport();
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172 if (imp)
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173 {
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174 if (!imp.pkg)
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175 {
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176 error("forward reference of import %s", imp.toChars());
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177 return this;
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178 }
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179 ScopeExp ie = new ScopeExp(loc, imp.pkg);
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180 return ie.semantic(sc);
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181 }
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182 pkg = s.isPackage();
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183 if (pkg)
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184 {
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185 ScopeExp ie = new ScopeExp(loc, pkg);
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186 return ie.semantic(sc);
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187 }
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188 Module mod = s.isModule();
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189 if (mod)
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190 {
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191 ScopeExp ie = new ScopeExp(loc, mod);
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192 return ie.semantic(sc);
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193 }
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194
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195 t = s.getType();
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196 if (t)
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197 {
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198 return new TypeExp(loc, t);
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199 }
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200
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201 TupleDeclaration tup = s.isTupleDeclaration();
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202 if (tup)
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203 {
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204 e = new TupleExp(loc, tup);
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205 e = e.semantic(sc);
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206 return e;
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207 }
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208
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209 TemplateInstance ti = s.isTemplateInstance();
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210 if (ti && !global.errors)
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211 {
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212 if (!ti.semanticRun)
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213 ti.semantic(sc);
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214
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215 s = ti.inst.toAlias();
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216 if (!s.isTemplateInstance())
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217 goto Lagain;
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218
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219 e = new ScopeExp(loc, ti);
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220 e = e.semantic(sc);
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221 return e;
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222 }
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223
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224 TemplateDeclaration td = s.isTemplateDeclaration();
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225 if (td)
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226 {
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227 e = new TemplateExp(loc, td);
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228 e = e.semantic(sc);
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229 return e;
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230 }
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231
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232 Lerr:
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233 error("%s '%s' is not a variable", s.kind(), s.toChars());
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234 type = Type.terror;
0
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235 return this;
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236 }
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237
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238 override string toChars()
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239 {
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240 assert(false);
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241 }
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242
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243 override void dump(int indent)
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244 {
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245 assert(false);
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246 }
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247
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248 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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249 {
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250 assert(false);
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251 }
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252
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253 override int isLvalue()
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254 {
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255 assert(false);
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256 }
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257
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258 override Expression toLvalue(Scope sc, Expression e)
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259 {
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260 assert(false);
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261 }
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262 }
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263