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annotate dmd/TupleExp.d @ 114:e28b18c23469

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added a module dmd.common for commonly used stuff it currently holds code for consistency checking of predefined versions also added a VisualD project file
author Trass3r
date Wed, 01 Sep 2010 18:21:58 +0200
parents 3482c73a991b
children e3afd1303184
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1 module dmd.TupleExp;
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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.TupleDeclaration;
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6 import dmd.backend.elem;
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7 import dmd.InterState;
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8 import dmd.WANT;
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9 import dmd.Type;
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10 import dmd.OutBuffer;
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11 import dmd.Loc;
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12 import dmd.Scope;
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13 import dmd.InlineCostState;
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14 import dmd.IRState;
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15 import dmd.InlineDoState;
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16 import dmd.HdrGenState;
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17 import dmd.InlineScanState;
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18 import dmd.ArrayTypes;
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19 import dmd.TypeExp;
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20 import dmd.TypeTuple;
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21 import dmd.TOK;
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22 import dmd.TY;
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23 import dmd.Dsymbol;
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24 import dmd.DsymbolExp;
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25 import dmd.DYNCAST;
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26 import dmd.expression.Util;
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27
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28 /****************************************
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29 * Expand tuples.
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30 */
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31 /+
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32 void expandTuples(Expressions exps)
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33 {
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34 //printf("expandTuples()\n");
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35 if (exps)
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36 {
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37 for (size_t i = 0; i < exps.dim; i++)
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38 { Expression arg = cast(Expression)exps.data[i];
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39 if (!arg)
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40 continue;
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41
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42 // Look for tuple with 0 members
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43 if (arg.op == TOKtype)
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44 { TypeExp e = cast(TypeExp)arg;
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45 if (e.type.toBasetype().ty == Ttuple)
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46 { TypeTuple tt = cast(TypeTuple)e.type.toBasetype();
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47
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48 if (!tt.arguments || tt.arguments.dim == 0)
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49 {
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50 exps.remove(i);
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51 if (i == exps.dim)
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52 return;
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53 i--;
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54 continue;
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55 }
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56 }
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57 }
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58
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59 // Inline expand all the tuples
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60 while (arg.op == TOKtuple)
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61 { TupleExp te = cast(TupleExp)arg;
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62
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63 exps.remove(i); // remove arg
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64 exps.insert(i, te.exps); // replace with tuple contents
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65 if (i == exps.dim)
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66 return; // empty tuple, no more arguments
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67 arg = cast(Expression)exps.data[i];
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68 }
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69 }
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70 }
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71 }
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72 +/
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73 class TupleExp : Expression
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74 {
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75 Expressions exps;
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76
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77 this(Loc loc, Expressions exps)
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78 {
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79 super(loc, TOKtuple, TupleExp.sizeof);
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80
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81 this.exps = exps;
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82 this.type = null;
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83 }
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84
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85 this(Loc loc, TupleDeclaration tup)
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86 {
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87 super(loc, TOKtuple, TupleExp.sizeof);
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88 exps = new Expressions();
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89 type = null;
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90
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91 exps.reserve(tup.objects.dim);
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92 foreach (o; tup.objects)
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93 {
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94 if (auto e = cast(Expression)o)
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95 {
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96 e = e.syntaxCopy();
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97 exps.push(e);
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98 }
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99 else if (auto s = cast(Dsymbol)o)
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100 {
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101 auto e = new DsymbolExp(loc, s);
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102 exps.push(e);
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103 }
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104 else if (auto t = cast(Type)o)
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105 {
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106 auto e = new TypeExp(loc, t);
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107 exps.push(e);
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108 }
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109 else
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110 {
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111 error("%s is not an expression", o.toString());
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112 }
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113 }
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114 }
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115
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116 override Expression syntaxCopy()
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117 {
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118 return new TupleExp(loc, arraySyntaxCopy(exps));
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119 }
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120
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121 override bool equals(Object o)
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122 {
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123 TupleExp ne;
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124
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125 if (this == o)
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126 return 1;
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127 if ((cast(Expression)o).op == TOKtuple)
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128 {
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129 auto te = cast(TupleExp)o;
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130 if (exps.dim != te.exps.dim)
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131 return 0;
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132 for (size_t i = 0; i < exps.dim; i++)
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133 { auto e1 = exps[i];
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134 auto e2 = te.exps[i];
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135
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136 if (!e1.equals(e2))
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137 return 0;
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138 }
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139 return 1;
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140 }
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141 return 0;
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142 }
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143
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144 override Expression semantic(Scope sc)
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145 {
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146 version (LOGSEMANTIC) {
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147 printf("+TupleExp::semantic(%s)\n", toChars());
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148 }
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149 if (type)
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150 return this;
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151
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152 // Run semantic() on each argument
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153 foreach (ref Expression e; exps)
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154 {
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155 e = e.semantic(sc);
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156 if (!e.type)
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157 { error("%s has no value", e.toChars());
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158 e.type = Type.terror;
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159 }
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160 }
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161
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162 expandTuples(exps);
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163 if (0 && exps.dim == 1)
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164 {
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165 return exps[0];
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166 }
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167 type = new TypeTuple(exps);
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168 type = type.semantic(loc, sc);
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169 //printf("-TupleExp::semantic(%s)\n", toChars());
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170 return this;
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171 }
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172
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173 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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174 {
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175 buf.writestring("tuple(");
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176 argsToCBuffer(buf, exps, hgs);
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177 buf.writeByte(')');
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178 }
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179
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180 override void scanForNestedRef(Scope sc)
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181 {
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182 assert(false);
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183 }
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184
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185 override void checkEscape()
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186 {
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187 foreach(e; exps)
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188 {
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189 e.checkEscape();
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190 }
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191 }
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192
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193 override bool checkSideEffect(int flag)
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194 {
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195 bool f = false;
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196
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197 foreach(e; exps)
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198 {
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199 f |= e.checkSideEffect(2);
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200 }
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201 if (flag == 0 && f == 0)
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202 Expression.checkSideEffect(0);
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203 return f;
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204 }
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205
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206 override Expression optimize(int result)
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207 {
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208 foreach(ref Expression e; exps)
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209 {
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210 e = e.optimize(WANTvalue | (result & WANTinterpret));
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211 }
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212 return this;
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213 }
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214
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215 override Expression interpret(InterState istate)
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216 {
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217 assert(false);
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218 }
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219
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220 override Expression castTo(Scope sc, Type t)
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221 {
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222 assert(false);
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223 }
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224
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225 override elem* toElem(IRState* irs)
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226 {
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227 assert(false);
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228 }
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229
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230 override bool canThrow()
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231 {
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232 return arrayExpressionCanThrow(exps);
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233 }
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234
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235 override int inlineCost(InlineCostState* ics)
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236 {
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237 assert(false);
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238 }
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239
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240 override Expression doInline(InlineDoState ids)
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241 {
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242 assert(false);
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243 }
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244
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245 override Expression inlineScan(InlineScanState* iss)
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246 {
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247 assert(false);
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248 }
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249 }
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250