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1 module dmd.StructInitializer;
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2
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3 import dmd.Initializer;
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2
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4 import dmd.TOK;
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5 import dmd.FuncLiteralDeclaration;
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6 import dmd.TypeFunction;
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0
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7 import dmd.ArrayTypes;
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8 import dmd.Array;
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9 import dmd.Loc;
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10 import dmd.Type;
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11 import dmd.Scope;
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12 import dmd.Identifier;
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2
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13 import dmd.CompoundStatement;
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14 import dmd.AggregateDeclaration;
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15 import dmd.OutBuffer;
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16 import dmd.HdrGenState;
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17 import dmd.Expression;
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2
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18 import dmd.TypeStruct;
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19 import dmd.TY;
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20 import dmd.VarDeclaration;
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21 import dmd.Dsymbol;
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22 import dmd.Util;
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23 import dmd.ExpInitializer;
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24 import dmd.FuncExp;
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25 import dmd.LINK;
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26
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27 import dmd.backend.dt_t;
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28
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29 class StructInitializer : Initializer
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30 {
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31 Identifiers field; // of Identifier *'s
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32 Initializers value; // parallel array of Initializer *'s
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33
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34 Array vars; // parallel array of VarDeclaration *'s
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35 AggregateDeclaration ad; // which aggregate this is for
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36
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37 this(Loc loc)
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38 {
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39 super(loc);
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40 ad = null;
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41
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42 field = new Identifiers();
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43 value = new Initializers();
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44 }
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45
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46 Initializer syntaxCopy()
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47 {
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48 StructInitializer ai = new StructInitializer(loc);
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49
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50 assert(field.dim == value.dim);
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51 ai.field.setDim(field.dim);
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52 ai.value.setDim(value.dim);
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53 for (int i = 0; i < field.dim; i++)
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54 {
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55 ai.field.data[i] = field.data[i];
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56
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57 Initializer init = cast(Initializer)value.data[i];
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58 init = init.syntaxCopy();
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59 ai.value.data[i] = cast(void*)init;
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60 }
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61
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62 return ai;
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63 }
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64
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65 void addInit(Identifier field, Initializer value)
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66 {
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67 //printf("StructInitializer.addInit(field = %p, value = %p)\n", field, value);
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68 this.field.push(cast(void*)field);
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69 this.value.push(cast(void*)value);
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70 }
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71
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72 Initializer semantic(Scope sc, Type t)
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73 {
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74 TypeStruct ts;
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75 int errors = 0;
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76
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77 //printf("StructInitializer.semantic(t = %s) %s\n", t.toChars(), toChars());
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78 vars.setDim(field.dim);
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79 t = t.toBasetype();
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80 if (t.ty == Tstruct)
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81 {
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82 uint i;
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83 uint fieldi = 0;
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84
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85 ts = cast(TypeStruct)t;
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86 ad = ts.sym;
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87 for (i = 0; i < field.dim; i++)
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88 {
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89 Identifier id = cast(Identifier)field.data[i];
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90 Initializer val = cast(Initializer)value.data[i];
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91 Dsymbol s;
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92 VarDeclaration v;
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93
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94 if (id is null)
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95 {
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96 if (fieldi >= ad.fields.dim)
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97 {
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98 error(loc, "too many initializers for %s", ad.toChars());
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99 field.remove(i);
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100 i--;
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101 continue;
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102 }
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103 else
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104 {
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105 s = cast(Dsymbol)ad.fields.data[fieldi];
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106 }
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107 }
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108 else
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109 {
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110 //s = ad.symtab.lookup(id);
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111 s = ad.search(loc, id, 0);
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112 if (!s)
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113 {
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114 error(loc, "'%s' is not a member of '%s'", id.toChars(), t.toChars());
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115 continue;
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116 }
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117
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118 // Find out which field index it is
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119 for (fieldi = 0; 1; fieldi++)
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120 {
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121 if (fieldi >= ad.fields.dim)
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122 {
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123 s.error("is not a per-instance initializable field");
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124 break;
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125 }
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126 if (s == cast(Dsymbol)ad.fields.data[fieldi])
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127 break;
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128 }
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129 }
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130 if (s && (v = s.isVarDeclaration()) !is null)
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131 {
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132 val = val.semantic(sc, v.type);
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133 value.data[i] = cast(void*)val;
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134 vars.data[i] = cast(void*)v;
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135 }
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136 else
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137 {
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138 error(loc, "%s is not a field of %s", id ? id.toChars() : s.toChars(), ad.toChars());
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139 errors = 1;
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140 }
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141 fieldi++;
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142 }
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143 }
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144 else if (t.ty == Tdelegate && value.dim == 0)
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145 {
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146 /* Rewrite as empty delegate literal { }
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147 */
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148 Arguments arguments = new Arguments;
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149 Type tf = new TypeFunction(arguments, null, 0, LINK.LINKd);
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150 FuncLiteralDeclaration fd = new FuncLiteralDeclaration(loc, Loc(0), tf, TOK.TOKdelegate, null);
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151 fd.fbody = new CompoundStatement(loc, new Statements());
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152 fd.endloc = loc;
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153 Expression e = new FuncExp(loc, fd);
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154 ExpInitializer ie = new ExpInitializer(loc, e);
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155 return ie.semantic(sc, t);
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156 }
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157 else
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158 {
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159 error(loc, "a struct is not a valid initializer for a %s", t.toChars());
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160 errors = 1;
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161 }
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162 if (errors)
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163 {
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164 field.setDim(0);
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165 value.setDim(0);
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166 vars.setDim(0);
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167 }
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168 return this;
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169 }
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170
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171 Expression toExpression()
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172 {
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173 assert(false);
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174 }
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175
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176 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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177 {
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178 assert(false);
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179 }
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180
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181 dt_t* toDt()
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182 {
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183 assert(false);
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184 }
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185
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186 StructInitializer isStructInitializer() { return this; }
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187 } |
