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annotate dmd/DsymbolExp.d @ 179:cd48cb899aee

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Updated to dmd2.040
author korDen
date Sun, 17 Oct 2010 20:56:07 +0400
parents e3afd1303184
children b0d41ff5e0df
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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 register();
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47 super(loc, TOK.TOKdsymbol, DsymbolExp.sizeof);
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48 this.s = s;
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49 this.hasOverloads = hasOverloads;
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50 }
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51
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52 override Expression semantic(Scope sc)
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53 {
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54 version (LOGSEMANTIC)
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55 {
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56 printf("DsymbolExp.semantic('%s')\n", s.toChars());
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57 }
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58
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59 Lagain:
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60 EnumMember em;
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61 Expression e;
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62 VarDeclaration v;
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63 FuncDeclaration f;
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64 FuncLiteralDeclaration fld;
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65 OverloadSet o;
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66 Declaration d;
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67 ClassDeclaration cd;
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68 ClassDeclaration thiscd = null;
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69 Import imp;
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70 Package pkg;
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71 Type t;
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72
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73 //printf("DsymbolExp. %p '%s' is a symbol\n", this, toChars());
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74 //printf("s = '%s', s.kind = '%s'\n", s.toChars(), s.kind());
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75 if (type)
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76 return this;
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77
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78 if (!s.isFuncDeclaration()) // functions are checked after overloading
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79 checkDeprecated(sc, s);
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80
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81 s = s.toAlias();
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82 //printf("s = '%s', s.kind = '%s', s.needThis() = %p\n", s.toChars(), s.kind(), s.needThis());
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83 if (!s.isFuncDeclaration())
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84 checkDeprecated(sc, s);
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85
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86 if (sc.func)
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87 thiscd = sc.func.parent.isClassDeclaration();
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88
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89 // BUG: This should happen after overload resolution for functions, not before
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90 if (s.needThis())
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91 {
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92 version (DMDV2) {
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93 bool cond = !s.isFuncDeclaration();
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94 } else {
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95 bool cond = true;
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96 }
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97 if (hasThis(sc) && cond)
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98 {
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99 // Supply an implicit 'this', as in
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100 // this.ident
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101 DotVarExp de = new DotVarExp(loc, new ThisExp(loc), s.isDeclaration());
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102 return de.semantic(sc);
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103 }
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104 }
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105
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106 em = s.isEnumMember();
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107 if (em)
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108 {
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109 e = em.value;
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110 e = e.semantic(sc);
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111 return e;
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112 }
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113 v = s.isVarDeclaration();
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114 if (v)
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115 {
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116 //printf("Identifier '%s' is a variable, type '%s'\n", toChars(), v.type.toChars());
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117 if (!type)
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118 {
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119 type = v.type;
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120 if (!v.type)
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121 {
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122 error("forward reference of %s %s", v.kind(), v.toChars());
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123 type = Type.terror;
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124 }
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125 }
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126
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127 if ((v.storage_class & STC.STCmanifest) && v.init)
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128 {
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129 e = v.init.toExpression();
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130 if (!e)
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131 {
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132 error("cannot make expression out of initializer for %s", v.toChars());
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133 e = new ErrorExp();
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134 }
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135 e = e.semantic(sc);
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136 return e;
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137 }
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138
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139 e = new VarExp(loc, v);
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140 e.type = type;
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141 e = e.semantic(sc);
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142 return e.deref();
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143 }
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144
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145 fld = s.isFuncLiteralDeclaration();
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146 if (fld)
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147 {
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148 //printf("'%s' is a function literal\n", fld.toChars());
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149 e = new FuncExp(loc, fld);
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150 return e.semantic(sc);
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151 }
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152 f = s.isFuncDeclaration();
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153 if (f)
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154 {
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155 //printf("'%s' is a function\n", f.toChars());
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156
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157 if (!f.type.deco)
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158 {
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159 error("forward reference to %s", toChars());
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160 return new ErrorExp();
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161 }
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162 return new VarExp(loc, f, hasOverloads);
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163 }
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164 o = s.isOverloadSet();
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165 if (o)
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166 {
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167 //printf("'%s' is an overload set\n", o.toChars());
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168 return new OverExp(o);
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169 }
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170 cd = s.isClassDeclaration();
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171 if (cd && thiscd && cd.isBaseOf(thiscd, null) && sc.func.needThis())
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172 {
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173 // We need to add an implicit 'this' if cd is this class or a base class.
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174 DotTypeExp dte = new DotTypeExp(loc, new ThisExp(loc), s);
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175 return dte.semantic(sc);
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176 }
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177 imp = s.isImport();
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178 if (imp)
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179 {
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180 if (!imp.pkg)
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181 {
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182 error("forward reference of import %s", imp.toChars());
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183 return this;
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184 }
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185 ScopeExp ie = new ScopeExp(loc, imp.pkg);
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186 return ie.semantic(sc);
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187 }
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188 pkg = s.isPackage();
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189 if (pkg)
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190 {
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191 ScopeExp ie = new ScopeExp(loc, pkg);
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192 return ie.semantic(sc);
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193 }
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194 Module mod = s.isModule();
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195 if (mod)
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196 {
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197 ScopeExp ie = new ScopeExp(loc, mod);
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198 return ie.semantic(sc);
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199 }
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200
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201 t = s.getType();
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202 if (t)
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203 {
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204 return new TypeExp(loc, t);
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205 }
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206
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207 TupleDeclaration tup = s.isTupleDeclaration();
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208 if (tup)
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209 {
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210 e = new TupleExp(loc, tup);
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211 e = e.semantic(sc);
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212 return e;
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213 }
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214
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215 TemplateInstance ti = s.isTemplateInstance();
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216 if (ti && !global.errors)
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217 {
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218 if (!ti.semanticRun)
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219 ti.semantic(sc);
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220
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221 s = ti.inst.toAlias();
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222 if (!s.isTemplateInstance())
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223 goto Lagain;
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224
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225 e = new ScopeExp(loc, ti);
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226 e = e.semantic(sc);
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227 return e;
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228 }
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229
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230 TemplateDeclaration td = s.isTemplateDeclaration();
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231 if (td)
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232 {
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233 e = new TemplateExp(loc, td);
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234 e = e.semantic(sc);
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235 return e;
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236 }
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237
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238 Lerr:
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239 error("%s '%s' is not a variable", s.kind(), s.toChars());
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240 type = Type.terror;
0
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241 return this;
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242 }
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243
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244 override string toChars()
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245 {
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246 assert(false);
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247 }
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248
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249 override void dump(int indent)
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250 {
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251 assert(false);
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252 }
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253
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254 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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255 {
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256 assert(false);
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257 }
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258
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259 override int isLvalue()
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260 {
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261 assert(false);
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262 }
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263
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264 override Expression toLvalue(Scope sc, Expression e)
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265 {
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266 assert(false);
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267 }
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268 }
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269