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0
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1 module dmd.TypeTypeof;
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2
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114
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3 import dmd.common;
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96
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4 import dmd.TypeFunction;
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0
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5 import dmd.TypeQualified;
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6 import dmd.Expression;
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7 import dmd.Identifier;
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8 import dmd.Scope;
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9 import dmd.Loc;
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10 import dmd.MOD;
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11 import dmd.Type;
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12 import dmd.Dsymbol;
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13 import dmd.OutBuffer;
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14 import dmd.HdrGenState;
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15 import dmd.TY;
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16 import dmd.Util;
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17 import dmd.TOK;
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18
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19 class TypeTypeof : TypeQualified
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20 {
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21 Expression exp;
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22
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23 this(Loc loc, Expression exp)
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24 {
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25 super(TY.Ttypeof, loc);
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26 this.exp = exp;
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27 }
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28
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29 version (DumbClone) {
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30 } else {
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31 Type clone()
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32 {
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33 assert(false);
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34 }
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35 }
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36
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72
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37 override Type syntaxCopy()
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0
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38 {
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51
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39 //printf("TypeTypeof.syntaxCopy() %s\n", toChars());
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40 TypeTypeof t;
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41
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42 t = new TypeTypeof(loc, exp.syntaxCopy());
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43 t.syntaxCopyHelper(this);
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44 t.mod = mod;
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45 return t;
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0
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46 }
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47
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72
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48 override Dsymbol toDsymbol(Scope sc)
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0
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49 {
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50 Type t = semantic(loc, sc);
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51 if (t is this)
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52 return null;
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53
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54 return t.toDsymbol(sc);
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55 }
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56
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72
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57 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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0
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58 {
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60
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59 if (mod != this.mod)
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60 {
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61 toCBuffer3(buf, hgs, mod);
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62 return;
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63 }
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64 buf.writestring("typeof(");
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65 exp.toCBuffer(buf, hgs);
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66 buf.writeByte(')');
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67 toCBuffer2Helper(buf, hgs);
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0
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68 }
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69
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72
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70 override Type semantic(Loc loc, Scope sc)
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0
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71 {
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72 Expression e;
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73 Type t;
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74
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60
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75 //printf("TypeTypeof.semantic() %.*s\n", toChars());
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0
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76
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77 //static int nest; if (++nest == 50) *(char*)0=0;
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78
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79 /+static if (false) {
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80 /* Special case for typeof(this) and typeof(super) since both
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81 * should work even if they are not inside a non-static member function
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82 */
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83 if (exp.op == TOK.TOKthis || exp.op == TOK.TOKsuper)
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84 {
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85 / / Find enclosing struct or class
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86 for (Dsymbol *s = sc.parent; 1; s = s.parent)
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87 {
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88 ClassDeclaration *cd;
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89 StructDeclaration *sd;
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90
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91 if (!s)
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92 {
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93 error(loc, "%s is not in a struct or class scope", exp.toChars());
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94 goto Lerr;
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95 }
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96 cd = s.isClassDeclaration();
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97 if (cd)
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98 {
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99 if (exp.op == TOK.TOKsuper)
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100 {
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101 cd = cd.baseClass;
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102 if (!cd)
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103 { error(loc, "class %s has no 'super'", s.toChars());
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104 goto Lerr;
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105 }
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106 }
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107 t = cd.type;
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108 break;
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109 }
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110 sd = s.isStructDeclaration();
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111 if (sd)
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112 {
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113 if (exp.op == TOK.TOKsuper)
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114 {
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115 error(loc, "struct %s has no 'super'", sd.toChars());
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116 goto Lerr;
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117 }
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118 t = sd.type.pointerTo();
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119 break;
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120 }
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121 }
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122 }
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123 else
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124 }+/
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125 {
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126 sc.intypeof++;
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127 exp = exp.semantic(sc);
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96
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128 if (exp.type && exp.type.ty == Tfunction &&
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129 (cast(TypeFunction)exp.type).isproperty)
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130 exp = resolveProperties(sc, exp);
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0
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131 sc.intypeof--;
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132 if (exp.op == TOK.TOKtype)
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133 {
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134 error(loc, "argument %s to typeof is not an expression", exp.toChars());
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135 }
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136 t = exp.type;
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137 if (!t)
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138 {
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139 error(loc, "expression (%s) has no type", exp.toChars());
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140 goto Lerr;
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141 }
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142 if (t.ty == TY.Ttypeof)
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143 error(loc, "forward reference to %s", toChars());
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144
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145 /* typeof should reflect the true type,
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146 * not what 'auto' would have gotten us.
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147 */
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148 //t = t.toHeadMutable();
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149 }
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150 if (idents.dim)
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151 {
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152 Dsymbol s = t.toDsymbol(sc);
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153 for (size_t i = 0; i < idents.dim; i++)
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154 {
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155 if (!s)
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156 break;
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157 Identifier id = cast(Identifier)idents.data[i];
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158 s = s.searchX(loc, sc, id);
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159 }
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160
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161 if (s)
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162 {
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163 t = s.getType();
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164 if (!t)
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165 {
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166 error(loc, "%s is not a type", s.toChars());
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167 goto Lerr;
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168 }
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169 }
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170 else
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171 {
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172 error(loc, "cannot resolve .property for %s", toChars());
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173 goto Lerr;
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174 }
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175 }
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176 return t;
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177
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178 Lerr:
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179 return tvoid;
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180 }
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181
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72
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182 override ulong size(Loc loc)
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0
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183 {
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184 assert(false);
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185 }
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72
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186 }
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