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annotate dmd/StructLiteralExp.d @ 72:2e2a5c3f943a

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reduced warnings by adding override to the methods think this also normalizes different line endings used all over the place
author Trass3r
date Sat, 28 Aug 2010 16:19:48 +0200
parents f708f0452e81
children 43073c7c7769
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 module dmd.StructLiteralExp;
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2
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3 import dmd.Expression;
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4 import dmd.MOD;
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5 import dmd.TypeStruct;
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6 import dmd.TypeSArray;
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7 import dmd.expression.Util;
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8 import dmd.ErrorExp;
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9 import dmd.Dsymbol;
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10 import dmd.VarDeclaration;
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11 import dmd.StructDeclaration;
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12 import dmd.FuncDeclaration;
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13 import dmd.ThisDeclaration;
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14 import dmd.backend.elem;
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15 import dmd.InterState;
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16 import dmd.MATCH;
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17 import dmd.WANT;
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18 import dmd.TY;
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19 import dmd.Type;
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20 import dmd.OutBuffer;
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21 import dmd.Loc;
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22 import dmd.Scope;
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23 import dmd.InlineCostState;
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24 import dmd.IRState;
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25 import dmd.InlineDoState;
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26 import dmd.backend.Symbol;
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27 import dmd.HdrGenState;
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28 import dmd.backend.dt_t;
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29 import dmd.InlineScanState;
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30 import dmd.ArrayTypes;
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31 import dmd.TOK;
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32
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33 import dmd.codegen.Util;
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34 import dmd.backend.Util;
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35 import dmd.backend.RTLSYM;
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36 import dmd.backend.TYM;
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37 import dmd.backend.mTY;
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38 import dmd.backend.OPER;
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39
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40
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41 class StructLiteralExp : Expression
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42 {
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43 StructDeclaration sd; // which aggregate this is for
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44 Expressions elements; // parallels sd->fields[] with
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45 // NULL entries for fields to skip
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46
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47 Symbol* sym; // back end symbol to initialize with literal
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48 size_t soffset; // offset from start of s
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49 int fillHoles; // fill alignment 'holes' with zero
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50
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51 this(Loc loc, StructDeclaration sd, Expressions elements)
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52 {
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53 super(loc, TOKstructliteral, StructLiteralExp.sizeof);
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54 this.sd = sd;
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55 this.elements = elements;
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56 this.sym = null;
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57 this.soffset = 0;
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58 this.fillHoles = 1;
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59 }
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60
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61 override Expression syntaxCopy()
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62 {
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63 assert(false);
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64 }
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65
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66 override Expression semantic(Scope sc)
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67 {
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68 Expression e;
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69 int nfields = sd.fields.dim - sd.isnested;
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70
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71 version (LOGSEMANTIC) {
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72 printf("StructLiteralExp.semantic('%s')\n", toChars());
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73 }
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74 if (type)
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75 return this;
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76
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77 // Run semantic() on each element
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78 for (size_t i = 0; i < elements.dim; i++)
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79 {
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80 e = cast(Expression)elements.data[i];
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81 if (!e)
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82 continue;
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83 e = e.semantic(sc);
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84 elements.data[i] = cast(void*)e;
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85 }
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86 expandTuples(elements);
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87 size_t offset = 0;
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88 for (size_t i = 0; i < elements.dim; i++)
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89 {
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90 e = cast(Expression)elements.data[i];
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91 if (!e)
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92 continue;
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93
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94 if (!e.type)
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95 error("%s has no value", e.toChars());
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96 e = resolveProperties(sc, e);
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97 if (i >= nfields)
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98 {
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99 error("more initializers than fields of %s", sd.toChars());
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100 return new ErrorExp();
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101 }
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102 Dsymbol s = cast(Dsymbol)sd.fields.data[i];
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103 VarDeclaration v = s.isVarDeclaration();
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104 assert(v);
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105 if (v.offset < offset)
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106 error("overlapping initialization for %s", v.toChars());
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107 offset = v.offset + cast(uint)v.type.size();
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108
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109 Type telem = v.type;
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110 while (!e.implicitConvTo(telem) && telem.toBasetype().ty == Tsarray)
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111 {
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112 /* Static array initialization, as in:
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113 * T[3][5] = e;
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114 */
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115 telem = telem.toBasetype().nextOf();
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116 }
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117
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118 e = e.implicitCastTo(sc, telem);
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119
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120 elements.data[i] = cast(void*)e;
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121 }
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122
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123 /* Fill out remainder of elements[] with default initializers for fields[]
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124 */
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125 for (size_t i = elements.dim; i < nfields; i++)
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126 {
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127 Dsymbol s = cast(Dsymbol)sd.fields.data[i];
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128 VarDeclaration v = s.isVarDeclaration();
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129 assert(v);
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130 assert(!v.isThisDeclaration());
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131
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132 if (v.offset < offset)
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133 {
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134 e = null;
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135 sd.hasUnions = 1;
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136 }
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137 else
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138 {
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139 if (v.init)
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140 {
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141 e = v.init.toExpression();
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142 if (!e)
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143 error("cannot make expression out of initializer for %s", v.toChars());
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144 }
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145 else
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146 {
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147 e = v.type.defaultInit(Loc(0));
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148 e.loc = loc;
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149 }
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150 offset = v.offset + cast(uint)v.type.size();
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151 }
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152 elements.push(cast(void*)e);
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153 }
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154
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155 type = sd.type;
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156 return this;
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157 }
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158
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159 Expression getField(Type type, uint offset)
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160 {
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161 assert(false);
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162 }
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163
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164 int getFieldIndex(Type type, uint offset)
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165 {
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166 assert(false);
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167 }
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168
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169 override elem* toElem(IRState* irs)
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170 {
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171 elem* e;
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172 size_t dim;
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173
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174 //printf("StructLiteralExp.toElem() %s\n", toChars());
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175
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176 // struct symbol to initialize with the literal
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177 Symbol* stmp = sym ? sym : symbol_genauto(sd.type.toCtype());
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178
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179 e = null;
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180
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181 if (fillHoles)
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182 {
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183 /* Initialize all alignment 'holes' to zero.
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184 * Do before initializing fields, as the hole filling process
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185 * can spill over into the fields.
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186 */
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187 size_t offset = 0;
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188 for (size_t i = 0; i < sd.fields.dim; i++)
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189 {
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190 Dsymbol s = cast(Dsymbol)sd.fields.data[i];
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191 VarDeclaration v = s.isVarDeclaration();
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192 assert(v);
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193
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194 e = el_combine(e, fillHole(stmp, &offset, v.offset, sd.structsize));
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195 size_t vend = v.offset + cast(uint)v.type.size();
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196 if (offset < vend)
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197 offset = vend;
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198 }
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199 e = el_combine(e, fillHole(stmp, &offset, sd.structsize, sd.structsize));
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200 }
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201
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202 if (elements)
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203 {
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204 dim = elements.dim;
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205 assert(dim <= sd.fields.dim);
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206 for (size_t i = 0; i < dim; i++)
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207 {
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208 Expression el = cast(Expression)elements.data[i];
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209 if (!el)
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210 continue;
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211
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212 Dsymbol s = cast(Dsymbol)sd.fields.data[i];
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213 VarDeclaration v = s.isVarDeclaration();
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214 assert(v);
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215 assert(!v.isThisDeclaration());
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216
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217 elem* e1;
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218 if (tybasic(stmp.Stype.Tty) == TYnptr)
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219 {
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220 e1 = el_var(stmp);
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221 e1.EV.sp.Voffset = soffset;
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222 }
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223 else
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224 {
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225 e1 = el_ptr(stmp);
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226 if (soffset)
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227 e1 = el_bin(OPadd, TYnptr, e1, el_long(TYsize_t, soffset));
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228 }
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229 e1 = el_bin(OPadd, TYnptr, e1, el_long(TYsize_t, v.offset));
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230 elem* ec = e1; // pointer to destination
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231
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232 elem* ep = el.toElem(irs);
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233
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234 Type t1b = v.type.toBasetype();
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235 Type t2b = el.type.toBasetype();
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236 if (t1b.ty == Tsarray)
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237 {
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238 if (t2b.implicitConvTo(t1b))
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239 {
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240 ///version (DMDV2) {
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241 // Determine if postblit is needed
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242 int postblit = 0;
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243 if (needsPostblit(t1b))
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244 postblit = 1;
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245
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246 if (postblit)
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247 {
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248 /* Generate:
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249 * _d_arrayctor(ti, From: ep, To: e1)
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250 */
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251 Expression ti = t1b.nextOf().toBasetype().getTypeInfo(null);
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252 elem* esize = el_long(TYsize_t, (cast(TypeSArray)t1b).dim.toInteger());
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253 e1 = el_pair(TYdarray, esize, e1);
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254 ep = el_pair(TYdarray, el_copytree(esize), array_toPtr(el.type, ep));
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255 ep = el_params(e1, ep, ti.toElem(irs), null);
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256 int rtl = RTLSYM_ARRAYCTOR;
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257 e1 = el_bin(OPcall, type.totym(), el_var(rtlsym[rtl]), ep);
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258 }
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259 else
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260 ///}
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261 {
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262 elem* esize = el_long(TYsize_t, t1b.size());
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263 ep = array_toPtr(el.type, ep);
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264 e1 = el_bin(OPmemcpy, TYnptr, e1, el_param(ep, esize));
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265 }
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266 }
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267 else
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268 {
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269 elem* edim = el_long(TYsize_t, t1b.size() / t2b.size());
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270 e1 = setArray(e1, edim, t2b, ep, irs, TOKconstruct);
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271 }
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272 }
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273 else
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274 {
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275 tym_t ty = v.type.totym();
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276 e1 = el_una(OPind, ty, e1);
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277 if (tybasic(ty) == TYstruct)
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278 e1.Enumbytes = cast(uint)v.type.size();
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279 e1 = el_bin(OPeq, ty, e1, ep);
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280 if (tybasic(ty) == TYstruct)
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281 {
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282 e1.Eoper = OPstreq;
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283 e1.Enumbytes = cast(uint)v.type.size();
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284 }
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285 version (DMDV2) {
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286 /* Call postblit() on e1
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287 */
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288 StructDeclaration sd = needsPostblit(v.type);
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289 if (sd)
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290 {
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291 FuncDeclaration fd = sd.postblit;
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292 ec = el_copytree(ec);
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293 ec = callfunc(loc, irs, 1, Type.tvoid, ec, sd.type.pointerTo(), fd, fd.type, null, null);
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294 e1 = el_bin(OPcomma, ec.Ety, e1, ec);
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295 }
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296 }
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297 }
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298 e = el_combine(e, e1);
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299 }
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300 }
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301
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302 version (DMDV2) {
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303 if (sd.isnested)
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304 { // Initialize the hidden 'this' pointer
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305 assert(sd.fields.dim);
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306 Dsymbol s = cast(Dsymbol)sd.fields.data[sd.fields.dim - 1];
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307 ThisDeclaration v = s.isThisDeclaration();
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308 assert(v);
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309
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310 elem* e1;
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311 if (tybasic(stmp.Stype.Tty) == TYnptr)
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312 {
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313 e1 = el_var(stmp);
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314 e1.EV.sp.Voffset = soffset;
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315 }
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316 else
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317 {
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318 e1 = el_ptr(stmp);
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319 if (soffset)
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320 e1 = el_bin(OPadd, TYnptr, e1, el_long(TYsize_t, soffset));
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321 }
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322 e1 = el_bin(OPadd, TYnptr, e1, el_long(TYsize_t, v.offset));
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323 e1 = setEthis(loc, irs, e1, sd);
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324
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325 e = el_combine(e, e1);
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326 }
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327 }
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328
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329 elem* ev = el_var(stmp);
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330 ev.Enumbytes = sd.structsize;
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331 e = el_combine(e, ev);
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332 el_setLoc(e,loc);
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333 return e;
0
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334 }
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335
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336 override bool checkSideEffect(int flag)
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337 {
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338 assert(false);
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339 }
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340
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341 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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342 {
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343 assert(false);
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344 }
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345
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346 override void toMangleBuffer(OutBuffer buf)
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347 {
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348 assert(false);
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349 }
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350
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351 override void scanForNestedRef(Scope sc)
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352 {
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353 assert(false);
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354 }
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355
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356 override Expression optimize(int result)
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357 {
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358 if (elements)
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359 {
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360 for (size_t i = 0; i < elements.dim; i++)
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361 {
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362 Expression e = cast(Expression)elements.data[i];
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363 if (!e)
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364 continue;
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365 e = e.optimize(WANTvalue | (result & WANTinterpret));
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366 elements.data[i] = cast(void*)e;
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367 }
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368 }
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369 return this;
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370 }
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371
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372 override Expression interpret(InterState istate)
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373 {
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374 assert(false);
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375 }
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376
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377 override dt_t** toDt(dt_t** pdt)
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378 {
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379 assert(false);
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380 }
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381
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382 override int isLvalue()
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383 {
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384 assert(false);
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385 }
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386
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387 override Expression toLvalue(Scope sc, Expression e)
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388 {
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389 assert(false);
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390 }
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391
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392 override bool canThrow()
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393 {
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394 return arrayExpressionCanThrow(elements);
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395 }
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396
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397 override MATCH implicitConvTo(Type t)
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398 {
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399 static if (false) {
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400 printf("StructLiteralExp.implicitConvTo(this=%.*s, type=%.*s, t=%.*s)\n",
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401 toChars(), type.toChars(), t.toChars());
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402 }
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403 MATCH m = Expression.implicitConvTo(t);
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404 if (m != MATCHnomatch)
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405 return m;
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406 if (type.ty == t.ty && type.ty == Tstruct && (cast(TypeStruct)type).sym == (cast(TypeStruct)t).sym)
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407 {
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408 m = MATCHconst;
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409 for (int i = 0; i < elements.dim; i++)
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410 {
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411 Expression e = cast(Expression)elements.data[i];
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412 Type te = e.type;
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413 if (t.mod == 0)
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414 te = te.mutableOf();
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415 else
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416 {
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417 assert(t.mod == MODinvariant);
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418 te = te.invariantOf();
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419 }
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420 MATCH m2 = e.implicitConvTo(te);
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421 //printf("\t%s => %s, match = %d\n", e.toChars(), te.toChars(), m2);
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422 if (m2 < m)
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423 m = m2;
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424 }
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425 }
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426 return m;
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427 }
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428
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429 override int inlineCost(InlineCostState* ics)
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430 {
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431 assert(false);
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432 }
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433
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434 override Expression doInline(InlineDoState ids)
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435 {
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436 assert(false);
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437 }
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438
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439 override Expression inlineScan(InlineScanState* iss)
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440 {
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441 assert(false);
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442 }
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443 }
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444