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1 module dmd.TypeTypedef;
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2
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3 import dmd.Type;
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4 import dmd.TypedefDeclaration;
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5 import dmd.MOD;
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6 import dmd.Loc;
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7 import dmd.Id;
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8 import dmd.Dsymbol;
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9 import dmd.Scope;
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10 import dmd.OutBuffer;
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11 import dmd.HdrGenState;
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12 import dmd.Expression;
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13 import dmd.Identifier;
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14 import dmd.ArrayTypes;
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15 import dmd.MATCH;
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16 import dmd.TypeSArray;
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17 import dmd.CppMangleState;
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18 import dmd.TypeInfoDeclaration;
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19 import dmd.TypeInfoTypedefDeclaration;
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20 import dmd.TY;
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21
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22 import dmd.backend.TYPE;
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23 import dmd.backend.dt_t;
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24
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25 class TypeTypedef : Type
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26 {
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27 TypedefDeclaration sym;
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28
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29 this(TypedefDeclaration sym)
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30 {
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31 super(Ttypedef);
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32 this.sym = sym;
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33 }
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34
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35 version (DumbClone) {
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36 } else {
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37 Type clone()
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38 {
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39 assert(false);
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40 }
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41 }
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42
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72
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43 override Type syntaxCopy()
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44 {
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45 assert(false);
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46 }
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47
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72
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48 override ulong size(Loc loc)
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49 {
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50 return sym.basetype.size(loc);
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51 }
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52
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72
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53 override uint alignsize()
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54 {
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55 assert(false);
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56 }
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57
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72
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58 override string toChars()
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59 {
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60 assert(false);
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61 }
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62
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72
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63 override Type semantic(Loc loc, Scope sc)
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64 {
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65 //printf("TypeTypedef::semantic(%s), sem = %d\n", toChars(), sym->sem);
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66 sym.semantic(sc);
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67 return merge();
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68 }
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69
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72
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70 override Dsymbol toDsymbol(Scope sc)
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71 {
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72 return sym;
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73 }
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74
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72
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75 override void toDecoBuffer(OutBuffer buf, int flag)
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76 {
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77 Type.toDecoBuffer(buf, flag);
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78 string name = sym.mangle();
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79 buf.printf("%s", name);
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80 }
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81
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72
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82 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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83 {
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67
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84 //printf("TypeTypedef.toCBuffer2() '%s'\n", sym.toChars());
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85 if (mod != this.mod)
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86 {
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87 toCBuffer3(buf, hgs, mod);
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88 return;
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89 }
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90
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91 buf.writestring(sym.toChars());
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92 }
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93
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72
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94 override Expression dotExp(Scope sc, Expression e, Identifier ident)
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95 {
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96 version (LOGDOTEXP) {
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97 printf("TypeTypedef.dotExp(e = '%s', ident = '%s') '%s'\n", e.toChars(), ident.toChars(), toChars());
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98 }
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99 if (ident is Id.init_)
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100 {
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101 return Type.dotExp(sc, e, ident);
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102 }
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103 return sym.basetype.dotExp(sc, e, ident);
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104 }
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105
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72
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106 override Expression getProperty(Loc loc, Identifier ident)
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107 {
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64
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108 version (LOGDOTEXP) {
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109 printf("TypeTypedef.getProperty(ident = '%s') '%s'\n", ident.toChars(), toChars());
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110 }
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111 if (ident == Id.init_)
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112 {
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113 return Type.getProperty(loc, ident);
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114 }
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115 return sym.basetype.getProperty(loc, ident);
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116 }
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117
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118 bool isbit()
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119 {
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120 assert(false);
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121 }
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122
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123 override bool isintegral()
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124 {
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125 //printf("TypeTypedef::isintegral()\n");
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126 //printf("sym = '%s'\n", sym->toChars());
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127 //printf("basetype = '%s'\n", sym->basetype->toChars());
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128 return sym.basetype.isintegral();
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129 }
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130
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131 override bool isfloating()
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132 {
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133 return sym.basetype.isfloating();
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134 }
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135
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72
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136 override bool isreal()
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137 {
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138 return sym.basetype.isreal();
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139 }
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140
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141 override bool isimaginary()
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142 {
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143 return sym.basetype.isimaginary();
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144 }
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145
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146 override bool iscomplex()
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147 {
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148 return sym.basetype.iscomplex();
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149 }
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150
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151 override bool isscalar()
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152 {
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153 return sym.basetype.isscalar();
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154 }
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155
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72
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156 override bool isunsigned()
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157 {
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158 return sym.basetype.isunsigned();
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159 }
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160
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161 override bool checkBoolean()
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162 {
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163 return sym.basetype.checkBoolean();
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164 }
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165
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166 override int isAssignable()
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167 {
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168 return sym.basetype.isAssignable();
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169 }
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170
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171 override Type toBasetype()
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172 {
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173 if (sym.inuse)
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174 {
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175 sym.error("circular definition");
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176 sym.basetype = Type.terror;
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177 return Type.terror;
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178 }
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179 sym.inuse = 1;
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180 Type t = sym.basetype.toBasetype();
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181 sym.inuse = 0;
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182 t = t.addMod(mod);
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183 return t;
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184 }
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185
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186 override MATCH implicitConvTo(Type to)
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187 {
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188 MATCH m;
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189
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190 //printf("TypeTypedef::implicitConvTo(to = %s) %s\n", to->toChars(), toChars());
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191 if (equals(to))
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192 m = MATCHexact; // exact match
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193 else if (sym.basetype.implicitConvTo(to))
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194 m = MATCHconvert; // match with conversions
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195 else if (ty == to.ty && sym == (cast(TypeTypedef)to).sym)
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196 {
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197 m = constConv(to);
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198 }
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199 else
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200 m = MATCHnomatch; // no match
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201 return m;
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202 }
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203
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204 override MATCH constConv(Type to)
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205 {
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206 if (equals(to))
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207 return MATCHexact;
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208 if (ty == to.ty && sym == (cast(TypeTypedef)to).sym)
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209 return sym.basetype.implicitConvTo((cast(TypeTypedef)to).sym.basetype);
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210 return MATCHnomatch;
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211 }
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212
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213 override Expression defaultInit(Loc loc)
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214 {
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215 Expression e;
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216 Type bt;
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217
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218 version (LOGDEFAULTINIT) {
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219 printf("TypeTypedef::defaultInit() '%s'\n", toChars());
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220 }
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221 if (sym.init)
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222 {
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223 //sym->init->toExpression()->print();
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224 return sym.init.toExpression();
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225 }
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226 bt = sym.basetype;
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227 e = bt.defaultInit(loc);
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228 e.type = this;
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229 while (bt.ty == Tsarray)
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230 {
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231 TypeSArray tsa = cast(TypeSArray)bt;
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232 e.type = tsa.next;
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233 bt = tsa.next.toBasetype();
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234 }
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235 return e;
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236 }
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237
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238 override bool isZeroInit(Loc loc)
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239 {
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240 if (sym.init)
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241 {
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242 if (sym.init.isVoidInitializer())
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243 return true; // initialize voids to 0
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244 Expression e = sym.init.toExpression();
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245 if (e && e.isBool(false))
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246 return true;
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247
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248 return false; // assume not
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249 }
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250 if (sym.inuse)
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251 {
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252 sym.error("circular definition");
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253 sym.basetype = Type.terror;
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254 }
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255 sym.inuse = 1;
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256 bool result = sym.basetype.isZeroInit(loc);
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257 sym.inuse = 0;
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258
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259 return result;
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260 }
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261
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262 override dt_t** toDt(dt_t** pdt)
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263 {
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264 if (sym.init)
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265 {
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266 dt_t* dt = sym.init.toDt();
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267
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268 while (*pdt)
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269 pdt = &((*pdt).DTnext);
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270 *pdt = dt;
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271 return pdt;
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272 }
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273
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274 sym.basetype.toDt(pdt);
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275 return pdt;
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276 }
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277
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278 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes)
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279 {
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280 // Extra check
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281 if (tparam && tparam.ty == Ttypedef)
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282 {
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283 TypeTypedef tp = cast(TypeTypedef)tparam;
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284
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285 if (sym != tp.sym)
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286 return MATCHnomatch;
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287 }
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288 return Type.deduceType(sc, tparam, parameters, dedtypes);
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289 }
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290
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291 override TypeInfoDeclaration getTypeInfoDeclaration()
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292 {
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293 return new TypeInfoTypedefDeclaration(this);
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294 }
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295
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296 override bool hasPointers()
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297 {
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298 return toBasetype().hasPointers();
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299 }
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300
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301 override Type toHeadMutable()
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302 {
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303 assert(false);
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304 }
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305
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306 version (CPP_MANGLE) {
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307 void toCppMangle(OutBuffer buf, CppMangleState* cms)
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308 {
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309 assert(false);
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310 }
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311 }
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312
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313 override type* toCtype()
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314 {
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315 return sym.basetype.toCtype();
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316 }
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317
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318 override type* toCParamtype()
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319 {
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320 return sym.basetype.toCParamtype();
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321 }
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322 }
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