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annotate dmd/TupleExp.d @ 192:eb38fdcb3e62 default tip

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updated to compile with dmd2.062
author korDen
date Sat, 02 Mar 2013 01:25:52 -0800
parents b0d41ff5e0df
children
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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 import dmd.DDMDExtensions;
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29
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30 /****************************************
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31 * Expand tuples.
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32 */
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33 /+
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34 void expandTuples(Expressions exps)
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35 {
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36 //printf("expandTuples()\n");
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37 if (exps)
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38 {
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39 for (size_t i = 0; i < exps.dim; i++)
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40 { Expression arg = cast(Expression)exps.data[i];
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41 if (!arg)
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42 continue;
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43
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44 // Look for tuple with 0 members
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45 if (arg.op == TOKtype)
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46 { TypeExp e = cast(TypeExp)arg;
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47 if (e.type.toBasetype().ty == Ttuple)
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48 { TypeTuple tt = cast(TypeTuple)e.type.toBasetype();
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49
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50 if (!tt.arguments || tt.arguments.dim == 0)
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51 {
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52 exps.remove(i);
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53 if (i == exps.dim)
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54 return;
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55 i--;
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56 continue;
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57 }
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58 }
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59 }
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60
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61 // Inline expand all the tuples
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62 while (arg.op == TOKtuple)
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63 { TupleExp te = cast(TupleExp)arg;
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64
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65 exps.remove(i); // remove arg
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66 exps.insert(i, te.exps); // replace with tuple contents
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67 if (i == exps.dim)
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68 return; // empty tuple, no more arguments
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69 arg = cast(Expression)exps.data[i];
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70 }
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71 }
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72 }
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73 }
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74 +/
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75 class TupleExp : Expression
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76 {
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77 mixin insertMemberExtension!(typeof(this));
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78
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79 Expressions exps;
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80
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81 this(Loc loc, Expressions exps)
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82 {
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83 register();
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84 super(loc, TOKtuple, TupleExp.sizeof);
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85
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86 this.exps = exps;
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87 this.type = null;
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88 }
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89
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90 this(Loc loc, TupleDeclaration tup)
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91 {
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92 register();
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93 super(loc, TOKtuple, TupleExp.sizeof);
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94 exps = new Expressions();
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95 type = null;
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96
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97 exps.reserve(tup.objects.dim);
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98 foreach (o; tup.objects)
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99 {
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100 if (auto e = cast(Expression)o)
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101 {
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102 e = e.syntaxCopy();
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103 exps.push(e);
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104 }
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105 else if (auto s = cast(Dsymbol)o)
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106 {
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107 auto e = new DsymbolExp(loc, s);
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108 exps.push(e);
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109 }
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110 else if (auto t = cast(Type)o)
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111 {
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112 auto e = new TypeExp(loc, t);
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113 exps.push(e);
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114 }
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115 else
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116 {
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117 error("%s is not an expression", o.toString());
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118 }
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119 }
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120 }
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121
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122 override Expression syntaxCopy()
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123 {
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124 return new TupleExp(loc, arraySyntaxCopy(exps));
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125 }
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126
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127 override bool equals(Object o)
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128 {
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129 TupleExp ne;
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130
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131 if (this == o)
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132 return 1;
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133 if ((cast(Expression)o).op == TOKtuple)
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134 {
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135 auto te = cast(TupleExp)o;
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136 if (exps.dim != te.exps.dim)
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137 return 0;
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138 for (size_t i = 0; i < exps.dim; i++)
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139 { auto e1 = exps[i];
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140 auto e2 = te.exps[i];
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141
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142 if (!e1.equals(e2))
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143 return 0;
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144 }
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145 return 1;
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146 }
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147 return 0;
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148 }
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149
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150 override Expression semantic(Scope sc)
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151 {
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152 version (LOGSEMANTIC) {
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153 printf("+TupleExp::semantic(%s)\n", toChars());
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154 }
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155 if (type)
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156 return this;
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157
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158 // Run semantic() on each argument
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159 foreach (ref Expression e; exps)
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160 {
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161 e = e.semantic(sc);
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162 if (!e.type)
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163 { error("%s has no value", e.toChars());
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164 e.type = Type.terror;
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165 }
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166 }
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167
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168 expandTuples(exps);
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169 if (0 && exps.dim == 1)
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170 {
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171 return exps[0];
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172 }
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173 type = new TypeTuple(exps);
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174 type = type.semantic(loc, sc);
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175 //printf("-TupleExp::semantic(%s)\n", toChars());
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176 return this;
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177 }
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178
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179 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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180 {
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181 buf.writestring("tuple(");
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182 argsToCBuffer(buf, exps, hgs);
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183 buf.writeByte(')');
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184 }
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185
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186 override void scanForNestedRef(Scope sc)
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187 {
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188 assert(false);
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189 }
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190
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191 override void checkEscape()
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192 {
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193 foreach(e; exps)
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194 {
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195 e.checkEscape();
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196 }
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197 }
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198
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199 override bool checkSideEffect(int flag)
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200 {
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201 bool f = false;
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202
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203 foreach(e; exps)
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204 {
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205 f |= e.checkSideEffect(2);
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206 }
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207 if (flag == 0 && f == 0)
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208 Expression.checkSideEffect(0);
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209 return f;
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210 }
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211
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212 override Expression optimize(int result)
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213 {
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214 foreach(ref Expression e; exps)
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215 {
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216 e = e.optimize(WANTvalue | (result & WANTinterpret));
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217 }
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218 return this;
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219 }
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220
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221 override Expression interpret(InterState istate)
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222 {
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223 assert(false);
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224 }
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225
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226 override Expression castTo(Scope sc, Type t)
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227 {
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228 assert(false);
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229 }
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230
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231 override elem* toElem(IRState* irs)
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232 {
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233 assert(false);
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234 }
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235
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236 override bool canThrow()
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237 {
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238 return arrayExpressionCanThrow(exps);
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239 }
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240
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241 override int inlineCost(InlineCostState* ics)
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242 {
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243 assert(false);
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244 }
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245
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246 override Expression doInline(InlineDoState ids)
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247 {
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248 assert(false);
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249 }
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250
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251 override Expression inlineScan(InlineScanState* iss)
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252 {
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253 assert(false);
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254 }
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255 }
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256