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annotate dmd/TemplateValueParameter.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 96c0fff6897d
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1 module dmd.TemplateValueParameter;
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2
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3 import dmd.common;
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4 import dmd.TemplateParameter;
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5 import dmd.Scope;
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6 import dmd.Declaration;
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7 import dmd.ArrayTypes;
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8 import dmd.Type;
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9 import dmd.Expression;
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10 import dmd.Loc;
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11 import dmd.Identifier;
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12 import dmd.OutBuffer;
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13 import dmd.HdrGenState;
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14 import dmd.MATCH;
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15 import dmd.VarDeclaration;
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16 import dmd.Initializer;
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17 import dmd.ExpInitializer;
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18 import dmd.DefaultInitExp;
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19 import dmd.STC;
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20 import dmd.Util;
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21 import dmd.TY;
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22 import dmd.WANT;
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23 import dmd.TOK;
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24
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25 import dmd.Dsymbol : isExpression;
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26
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27 class TemplateValueParameter : TemplateParameter
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28 {
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29 /* Syntax:
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30 * valType ident : specValue = defaultValue
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31 */
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32
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33 Type valType;
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34 Expression specValue;
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35 Expression defaultValue;
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36
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37 static Expression edummy;
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38
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39 this(Loc loc, Identifier ident, Type valType, Expression specValue, Expression defaultValue)
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40 {
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41 super(loc, ident);
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43 this.valType = valType;
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44 this.specValue = specValue;
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45 this.defaultValue = defaultValue;
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46 }
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47
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48 override TemplateValueParameter isTemplateValueParameter()
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49 {
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50 return this;
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51 }
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52
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53 override TemplateParameter syntaxCopy()
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54 {
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55 TemplateValueParameter tp = new TemplateValueParameter(loc, ident, valType, specValue, defaultValue);
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56 tp.valType = valType.syntaxCopy();
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57 if (specValue)
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58 tp.specValue = specValue.syntaxCopy();
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59 if (defaultValue)
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60 tp.defaultValue = defaultValue.syntaxCopy();
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61 return tp;
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62 }
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63
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64 override void declareParameter(Scope sc)
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65 {
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66 VarDeclaration v = new VarDeclaration(loc, valType, ident, null);
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67 v.storage_class = STC.STCtemplateparameter;
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68 if (!sc.insert(v))
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69 error(loc, "parameter '%s' multiply defined", ident.toChars());
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70 sparam = v;
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71 }
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72
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73 override void semantic(Scope sc)
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74 {
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75 sparam.semantic(sc);
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76 valType = valType.semantic(loc, sc);
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77 if (!(valType.isintegral() || valType.isfloating() || valType.isString()) && valType.ty != TY.Tident)
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78 error(loc, "arithmetic/string type expected for value-parameter, not %s", valType.toChars());
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79
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80 if (specValue)
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81 {
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82 Expression e = specValue;
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83
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84 e = e.semantic(sc);
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85 e = e.implicitCastTo(sc, valType);
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86 e = e.optimize(WANTvalue | WANTinterpret);
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87 if (e.op == TOKint64 || e.op == TOKfloat64 ||
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88 e.op == TOKcomplex80 || e.op == TOKnull || e.op == TOKstring)
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89 specValue = e;
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90 //e.toInteger();
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91 }
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92
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93 static if (false) { // defer semantic analysis to arg match
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94 if (defaultValue)
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95 {
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96 Expression e = defaultValue;
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97
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98 e = e.semantic(sc);
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99 e = e.implicitCastTo(sc, valType);
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100 e = e.optimize(WANTvalue | WANTinterpret);
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101 if (e.op == TOKint64)
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102 defaultValue = e;
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103 //e.toInteger();
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104 }
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105 }
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106 }
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107
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108 override void print(Object oarg, Object oded)
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109 {
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110 assert(false);
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111 }
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112
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113 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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114 {
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115 valType.toCBuffer(buf, ident, hgs);
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116 if (specValue)
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117 {
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118 buf.writestring(" : ");
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119 specValue.toCBuffer(buf, hgs);
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120 }
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121 if (defaultValue)
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122 {
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123 buf.writestring(" = ");
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124 defaultValue.toCBuffer(buf, hgs);
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125 }
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126 }
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127
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128 override Object specialization()
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129 {
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130 return specValue;
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131 }
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132
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133 override Object defaultArg(Loc loc, Scope sc)
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134 {
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135 Expression e = defaultValue;
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136 if (e)
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137 {
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138 e = e.syntaxCopy();
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139 e = e.semantic(sc);
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140 version (DMDV2) {
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141 e = e.resolveLoc(loc, sc);
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142 }
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143 }
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144 return e;
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145 }
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146
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147 override bool overloadMatch(TemplateParameter tp)
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148 {
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149 TemplateValueParameter tvp = tp.isTemplateValueParameter();
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150
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151 if (tvp)
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152 {
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153 if (valType != tvp.valType)
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154 return false;
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155
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156 if (valType && !valType.equals(tvp.valType))
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157 return false;
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158
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159 if (specValue != tvp.specValue)
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160 return false;
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161
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162 return true; // match
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163 }
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164
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165 return false;
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166 }
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167
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168 override MATCH matchArg(Scope sc, Objects tiargs, int i, TemplateParameters parameters, Objects dedtypes, Declaration* psparam, int flags)
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169 {
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170 //printf("TemplateValueParameter.matchArg()\n");
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171
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172 Initializer init;
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173 Declaration sparam;
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174 MATCH m = MATCHexact;
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175 Expression ei;
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176 Object oarg;
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177
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178 if (i < tiargs.dim)
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179 oarg = tiargs[i];
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180 else
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181 {
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182 // Get default argument instead
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183 oarg = defaultArg(loc, sc);
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184 if (!oarg)
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185 {
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186 assert(i < dedtypes.dim);
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187 // It might have already been deduced
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188 oarg = dedtypes[i];
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189 if (!oarg)
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190 goto Lnomatch;
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191 }
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192 }
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193
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194 ei = isExpression(oarg);
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195 Type vt;
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196
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197 if (!ei && oarg)
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198 goto Lnomatch;
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199
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200 if (ei && ei.op == TOKvar)
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201 {
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202 // Resolve const variables that we had skipped earlier
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203 ei = ei.optimize(WANTvalue | WANTinterpret);
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204 }
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205
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206 if (specValue)
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207 {
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208 if (!ei || ei == edummy)
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209 goto Lnomatch;
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210
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211 Expression e = specValue;
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212
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213 e = e.semantic(sc);
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214 e = e.implicitCastTo(sc, valType);
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215 e = e.optimize(WANTvalue | WANTinterpret);
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216 //e.type = e.type.toHeadMutable();
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217
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218 ei = ei.syntaxCopy();
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219 ei = ei.semantic(sc);
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220 ei = ei.optimize(WANTvalue | WANTinterpret);
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221 //ei.type = ei.type.toHeadMutable();
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222 //printf("\tei: %s, %s\n", ei.toChars(), ei.type.toChars());
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223 //printf("\te : %s, %s\n", e.toChars(), e.type.toChars());
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224 if (!ei.equals(e))
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225 goto Lnomatch;
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226 }
113
3482c73a991b More cleanup for arrays
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227 else if (dedtypes[i])
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228 { // Must match already deduced value
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3482c73a991b More cleanup for arrays
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229 auto e = cast(Expression)dedtypes[i];
40
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230
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231 if (!ei || !ei.equals(e))
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232 goto Lnomatch;
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233 }
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234 Lmatch:
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235 //printf("\tvalType: %s, ty = %d\n", valType.toChars(), valType.ty);
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236 vt = valType.semantic(Loc(0), sc);
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237 //printf("ei: %s, ei.type: %s\n", ei.toChars(), ei.type.toChars());
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238 //printf("vt = %s\n", vt.toChars());
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239 if (ei.type)
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240 {
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241 m = cast(MATCH)ei.implicitConvTo(vt);
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242 //printf("m: %d\n", m);
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243 if (!m)
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244 goto Lnomatch;
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245 }
94
3a0b150c9841 Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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246 dedtypes[i] = ei;
40
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247
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248 init = new ExpInitializer(loc, ei);
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249 sparam = new VarDeclaration(loc, vt, ident, init);
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250 sparam.storage_class = STCmanifest;
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251 *psparam = sparam;
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252 return m;
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253
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254 Lnomatch:
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255 //printf("\tno match\n");
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256 *psparam = null;
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257 return MATCHnomatch;
0
10317f0c89a5 Initial commit
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258 }
10317f0c89a5 Initial commit
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259
94
3a0b150c9841 Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff changeset
260 override Object dummyArg()
0
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261 {
64
4290d870944a More fixes
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262 Expression e;
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263
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264 e = specValue;
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265 if (!e)
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266 {
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267 // Create a dummy value
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268 if (!edummy)
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269 edummy = valType.defaultInit(Loc(0));
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270 e = edummy;
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271 }
94
3a0b150c9841 Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff changeset
272 return e;
0
10317f0c89a5 Initial commit
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273 }
72
2e2a5c3f943a reduced warnings by adding override to the methods
Trass3r
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diff changeset
274 }