annotate dmd/AssocArrayLiteralExp.d @ 187:b0d41ff5e0df

Added expandability scheme outlined in http://www.dsource.org/forums/viewtopic.php?t=5659&sid=6f2150ff5b0bffcd47512a6a7608d218
author Abscissa
date Tue, 07 Jun 2011 23:37:34 -0400
parents e3afd1303184
children
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1 module dmd.AssocArrayLiteralExp;
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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.GlobalExpressions;
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6 import dmd.WANT;
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7 import dmd.expression.Equal;
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8 import dmd.backend.elem;
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9 import dmd.InterState;
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10 import dmd.MATCH;
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11 import dmd.Type;
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12 import dmd.TypeAArray;
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13 import dmd.OutBuffer;
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14 import dmd.Loc;
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15 import dmd.Scope;
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16 import dmd.InlineCostState;
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17 import dmd.IRState;
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18 import dmd.TY;
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19 import dmd.InlineDoState;
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20 import dmd.HdrGenState;
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21 import dmd.InlineScanState;
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22 import dmd.ArrayTypes;
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23 import dmd.TOK;
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24 import dmd.PREC;
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25 import dmd.expression.Util;
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26 import dmd.backend.Util;
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27 import dmd.backend.TYM;
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28 import dmd.backend.mTY;
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29 import dmd.backend.OPER;
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30 import dmd.backend.RTLSYM;
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31
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32 import dmd.DDMDExtensions;
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33
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34 class AssocArrayLiteralExp : Expression
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35 {
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36 mixin insertMemberExtension!(typeof(this));
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37
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38 Expressions keys;
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39 Expressions values;
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40
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41 this(Loc loc, Expressions keys, Expressions values)
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42 {
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43 register();
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44
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45 super(loc, TOK.TOKassocarrayliteral, this.sizeof);
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46 assert(keys.dim == values.dim);
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47 this.keys = keys;
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48 this.values = values;
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49 }
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50
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51 override Expression syntaxCopy()
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52 {
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53 return new AssocArrayLiteralExp(loc,
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54 arraySyntaxCopy(keys), arraySyntaxCopy(values));
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55 }
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56
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57 override Expression semantic(Scope sc)
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58 {
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59 Expression e;
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60
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61 version (LOGSEMANTIC) {
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62 printf("AssocArrayLiteralExp.semantic('%s')\n", toChars());
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63 }
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64
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65 if (type)
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66 return this;
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67
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68 // Run semantic() on each element
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69 arrayExpressionSemantic(keys, sc);
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70 arrayExpressionSemantic(values, sc);
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71 expandTuples(keys);
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72 expandTuples(values);
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73 if (keys.dim != values.dim)
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74 {
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75 error("number of keys is %u, must match number of values %u", keys.dim, values.dim);
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76 keys.setDim(0);
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77 values.setDim(0);
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78 }
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79
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80 Type tkey;
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81 Type tvalue;
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82 keys = arrayExpressionToCommonType(sc, keys, &tkey);
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83 values = arrayExpressionToCommonType(sc, values, &tvalue);
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84
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85 type = new TypeAArray(tvalue, tkey);
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86 type = type.semantic(loc, sc);
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87 return this;
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88 }
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89
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90 override bool isBool(bool result)
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91 {
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92 size_t dim = keys.dim;
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93 return result ? (dim != 0) : (dim == 0);
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94 }
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95
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96 override elem* toElem(IRState* irs)
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97 {
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98 elem* e;
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99 size_t dim;
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100
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101 //printf("AssocArrayLiteralExp.toElem() %s\n", toChars());
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102 dim = keys.dim;
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103 e = el_long(TYint, dim);
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104 for (size_t i = 0; i < dim; i++)
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105 {
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106 auto el = keys[i];
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107
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108 for (int j = 0; j < 2; j++)
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109 {
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110 elem* ep = el.toElem(irs);
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111
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112 if (tybasic(ep.Ety) == TYstruct || tybasic(ep.Ety) == TYarray)
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113 {
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114 ep = el_una(OPstrpar, TYstruct, ep);
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115 ep.Enumbytes = cast(uint)el.type.size();
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116 }
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117 //printf("[%d] %s\n", i, el.toChars());
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118 //elem_print(ep);
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119 e = el_param(ep, e);
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120 el = values[i];
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121 }
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122 }
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123
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124 Type t = type.toBasetype().mutableOf();
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125 assert(t.ty == Taarray);
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126 auto ta = cast(TypeAArray)t;
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127
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128 static if(false)
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129 {
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130 /* Unfortunately, the hash function for Aa (array of chars) is custom and
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131 * different from Axa and Aya, which get the generic hash function.
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132 * So, rewrite the type of the AArray so that if it's key type
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133 * is an array of const or invariant, make it an array of mutable.
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134 */
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135 Type tkey = ta.index.toBasetype();
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136 if (tkey.ty == Tarray)
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137 {
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138 tkey = tkey.nextOf().mutableOf().arrayOf();
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139 tkey = tkey.semantic(Loc(0), null);
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140 ta = new TypeAArray(ta.nextOf(), tkey);
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141 ta = cast(TypeAArray)ta.merge();
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142 }
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143 }
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144
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145 e = el_param(e, ta.getTypeInfo(null).toElem(irs));
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146
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147 // call _d_assocarrayliteralT(ti, dim, ...)
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148 e = el_bin(OPcall,TYnptr,el_var(rtlsym[RTLSYM_ASSOCARRAYLITERALT]),e);
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149
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150 el_setLoc(e,loc);
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151 return e;
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152 }
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153
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154 override bool checkSideEffect(int flag)
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155 {
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156 bool f = false;
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157
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158 for (size_t i = 0; i < keys.dim; i++)
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159 { auto key = keys[i];
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160 auto value = values[i];
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161
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162 f |= key.checkSideEffect(2);
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163 f |= value.checkSideEffect(2);
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164 }
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165 if (flag == 0 && f == 0)
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166 Expression.checkSideEffect(0);
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167 return f;
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168 }
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169
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170 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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171 {
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172 buf.writeByte('[');
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173 for (size_t i = 0; i < keys.dim; i++)
90
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174 { auto key = keys[i];
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175 auto value = values[i];
72
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176
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177 if (i)
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178 buf.writeByte(',');
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179 expToCBuffer(buf, hgs, key, PREC.PREC_assign);
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180 buf.writeByte(':');
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181 expToCBuffer(buf, hgs, value, PREC.PREC_assign);
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182 }
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183 buf.writeByte(']');
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184 }
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185
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186 override void toMangleBuffer(OutBuffer buf)
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187 {
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188 size_t dim = keys.dim;
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189 buf.printf("A%u", dim);
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190 for (size_t i = 0; i < dim; i++)
90
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191 { auto key = keys[i];
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192 auto value = values[i];
72
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193
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194 key.toMangleBuffer(buf);
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195 value.toMangleBuffer(buf);
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196 }
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197 }
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198
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199 override void scanForNestedRef(Scope sc)
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200 {
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201 assert(false);
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202 }
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203
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204 override Expression optimize(int result)
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205 {
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206 assert(keys.dim == values.dim);
90
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207 foreach (size_t i, Expression e; keys)
72
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208 {
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209 e = e.optimize(WANTvalue | (result & WANTinterpret));
90
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210 keys[i] = e;
72
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211
90
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212 e = values[i];
72
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213 e = e.optimize(WANTvalue | (result & WANTinterpret));
90
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214 values[i] = e;
72
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215 }
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216 return this;
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217 }
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218
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219 override Expression interpret(InterState istate)
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220 {
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221 Expressions keysx = keys;
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222 Expressions valuesx = values;
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223
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224 version (LOG) {
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225 printf("AssocArrayLiteralExp.interpret() %s\n", toChars());
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226 }
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227 for (size_t i = 0; i < keys.dim; i++)
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228 {
90
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229 auto ekey = keys[i];
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230 auto evalue = values[i];
72
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diff changeset
231 Expression ex;
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232
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233 ex = ekey.interpret(istate);
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234 if (ex is EXP_CANT_INTERPRET)
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235 goto Lerr;
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236
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237 /* If any changes, do Copy On Write
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238 */
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239 if (ex != ekey)
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240 {
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diff changeset
241 if (keysx == keys)
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242 keysx = cast(Expressions)keys.copy();
90
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diff changeset
243 keysx[i] = ex;
72
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244 }
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245
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246 ex = evalue.interpret(istate);
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247 if (ex is EXP_CANT_INTERPRET)
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248 goto Lerr;
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249
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diff changeset
250 /* If any changes, do Copy On Write
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251 */
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252 if (ex != evalue)
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253 {
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254 if (valuesx == values)
84
be2ab491772e Expressions -> Vector!Expression
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255 valuesx = values.copy();
90
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diff changeset
256 valuesx[i] = ex;
72
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257 }
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258 }
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diff changeset
259
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diff changeset
260 if (keysx != keys)
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diff changeset
261 expandTuples(keysx);
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262 if (valuesx != values)
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diff changeset
263 expandTuples(valuesx);
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264 if (keysx.dim != valuesx.dim)
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265 goto Lerr;
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266
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267 /* Remove duplicate keys
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268 */
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269 for (size_t i = 1; i < keysx.dim; i++)
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270 {
90
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271 auto ekey = keysx[i - 1];
72
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diff changeset
272
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diff changeset
273 for (size_t j = i; j < keysx.dim; j++)
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274 {
90
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diff changeset
275 auto ekey2 = keysx[j];
72
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276 Expression ex = Equal(TOKequal, Type.tbool, ekey, ekey2);
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277 if (ex is EXP_CANT_INTERPRET)
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278 goto Lerr;
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diff changeset
279 if (ex.isBool(true)) // if a match
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280 {
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diff changeset
281 // Remove ekey
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diff changeset
282 if (keysx == keys)
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diff changeset
283 keysx = cast(Expressions)keys.copy();
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284 if (valuesx == values)
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285 valuesx = cast(Expressions)values.copy();
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diff changeset
286 keysx.remove(i - 1);
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diff changeset
287 valuesx.remove(i - 1);
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diff changeset
288 i -= 1; // redo the i'th iteration
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289 break;
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290 }
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diff changeset
291 }
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diff changeset
292 }
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diff changeset
293
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diff changeset
294 if (keysx != keys || valuesx != values)
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diff changeset
295 {
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diff changeset
296 AssocArrayLiteralExp ae;
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diff changeset
297 ae = new AssocArrayLiteralExp(loc, keysx, valuesx);
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diff changeset
298 ae.type = type;
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diff changeset
299 return ae;
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diff changeset
300 }
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diff changeset
301 return this;
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diff changeset
302
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diff changeset
303 Lerr:
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diff changeset
304 if (keysx != keys)
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diff changeset
305 delete keysx;
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diff changeset
306 if (valuesx != values)
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parents: 68
diff changeset
307 delete values;
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diff changeset
308 return EXP_CANT_INTERPRET;
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diff changeset
309 }
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diff changeset
310
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diff changeset
311 override MATCH implicitConvTo(Type t)
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diff changeset
312 {
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diff changeset
313 MATCH result = MATCHexact;
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diff changeset
314
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diff changeset
315 Type typeb = type.toBasetype();
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diff changeset
316 Type tb = t.toBasetype();
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diff changeset
317 if (tb.ty == Taarray && typeb.ty == Taarray)
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diff changeset
318 {
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diff changeset
319 for (size_t i = 0; i < keys.dim; i++)
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diff changeset
320 {
90
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diff changeset
321 auto e = keys[i];
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diff changeset
322 auto m = cast(MATCH)e.implicitConvTo((cast(TypeAArray)tb).index);
72
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diff changeset
323 if (m < result)
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diff changeset
324 result = m; // remember worst match
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diff changeset
325 if (result == MATCHnomatch)
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diff changeset
326 break; // no need to check for worse
90
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diff changeset
327 e = values[i];
72
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diff changeset
328 m = cast(MATCH)e.implicitConvTo(tb.nextOf());
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diff changeset
329 if (m < result)
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diff changeset
330 result = m; // remember worst match
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diff changeset
331 if (result == MATCHnomatch)
2e2a5c3f943a reduced warnings by adding override to the methods
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diff changeset
332 break; // no need to check for worse
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diff changeset
333 }
2e2a5c3f943a reduced warnings by adding override to the methods
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334 return result;
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335 }
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336 else
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337 return Expression.implicitConvTo(t);
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338 }
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339
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340 override Expression castTo(Scope sc, Type t)
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341 {
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342 if (type == t)
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343 return this;
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344 AssocArrayLiteralExp e = this;
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345 Type typeb = type.toBasetype();
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346 Type tb = t.toBasetype();
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347 if (tb.ty == Taarray && typeb.ty == Taarray && tb.nextOf().toBasetype().ty != Tvoid)
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348 {
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349 e = cast(AssocArrayLiteralExp)copy();
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350 e.keys = cast(Expressions)keys.copy();
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351 e.values = cast(Expressions)values.copy();
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352 assert(keys.dim == values.dim);
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353 for (size_t i = 0; i < keys.dim; i++)
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354 {
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355 auto ex = values[i];
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356 ex = ex.castTo(sc, tb.nextOf());
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357 e.values[i] = ex;
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358
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359 ex = keys[i];
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360 ex = ex.castTo(sc, (cast(TypeAArray)tb).index);
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361 e.keys[i] = ex;
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362 }
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363 e.type = t;
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364 return e;
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365 }
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366 L1:
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367 return e.Expression.castTo(sc, t);
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368 }
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369
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370 override bool canThrow()
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371 {
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372 return true;
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373 }
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374
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375 override int inlineCost(InlineCostState* ics)
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376 {
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377 assert(false);
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378 }
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379
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380 override Expression doInline(InlineDoState ids)
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381 {
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382 assert(false);
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383 }
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384
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385 override Expression inlineScan(InlineScanState* iss)
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386 {
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387 assert(false);
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388 }
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389 }