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1 module dmd.TypeTypedef;
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2
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114
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3 import dmd.common;
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0
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4 import dmd.Type;
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5 import dmd.TypedefDeclaration;
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6 import dmd.MOD;
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7 import dmd.Loc;
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8 import dmd.Id;
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9 import dmd.Dsymbol;
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10 import dmd.Scope;
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11 import dmd.OutBuffer;
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12 import dmd.HdrGenState;
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13 import dmd.Expression;
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14 import dmd.Identifier;
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15 import dmd.ArrayTypes;
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16 import dmd.MATCH;
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17 import dmd.TypeSArray;
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18 import dmd.CppMangleState;
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19 import dmd.TypeInfoDeclaration;
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20 import dmd.TypeInfoTypedefDeclaration;
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21 import dmd.TY;
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22
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23 import dmd.backend.TYPE;
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24 import dmd.backend.dt_t;
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25
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26 class TypeTypedef : Type
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27 {
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28 TypedefDeclaration sym;
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29
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30 this(TypedefDeclaration sym)
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31 {
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32 super(Ttypedef);
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33 this.sym = sym;
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34 }
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35
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36 version (DumbClone) {
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37 } else {
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38 Type clone()
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39 {
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40 assert(false);
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41 }
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42 }
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43
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72
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44 override Type syntaxCopy()
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45 {
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46 assert(false);
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47 }
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48
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72
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49 override ulong size(Loc loc)
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50 {
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51 return sym.basetype.size(loc);
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52 }
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53
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54 override uint alignsize()
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55 {
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56 assert(false);
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57 }
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58
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59 override string toChars()
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60 {
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61 assert(false);
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62 }
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63
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72
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64 override Type semantic(Loc loc, Scope sc)
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65 {
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66 //printf("TypeTypedef::semantic(%s), sem = %d\n", toChars(), sym->sem);
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67 sym.semantic(sc);
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68 return merge();
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69 }
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70
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72
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71 override Dsymbol toDsymbol(Scope sc)
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72 {
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73 return sym;
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74 }
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75
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72
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76 override void toDecoBuffer(OutBuffer buf, int flag)
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77 {
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78 Type.toDecoBuffer(buf, flag);
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79 string name = sym.mangle();
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80 buf.printf("%s", name);
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81 }
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82
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83 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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84 {
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85 //printf("TypeTypedef.toCBuffer2() '%s'\n", sym.toChars());
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86 if (mod != this.mod)
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87 {
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88 toCBuffer3(buf, hgs, mod);
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89 return;
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90 }
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91
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92 buf.writestring(sym.toChars());
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93 }
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94
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72
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95 override Expression dotExp(Scope sc, Expression e, Identifier ident)
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96 {
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97 version (LOGDOTEXP) {
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98 printf("TypeTypedef.dotExp(e = '%s', ident = '%s') '%s'\n", e.toChars(), ident.toChars(), toChars());
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99 }
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100 if (ident is Id.init_)
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101 {
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102 return Type.dotExp(sc, e, ident);
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103 }
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104 return sym.basetype.dotExp(sc, e, ident);
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105 }
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106
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107 override Expression getProperty(Loc loc, Identifier ident)
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108 {
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64
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109 version (LOGDOTEXP) {
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110 printf("TypeTypedef.getProperty(ident = '%s') '%s'\n", ident.toChars(), toChars());
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111 }
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112 if (ident == Id.init_)
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113 {
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114 return Type.getProperty(loc, ident);
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115 }
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116 return sym.basetype.getProperty(loc, ident);
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117 }
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118
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119 bool isbit()
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120 {
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121 assert(false);
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122 }
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123
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124 override bool isintegral()
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125 {
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126 //printf("TypeTypedef::isintegral()\n");
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127 //printf("sym = '%s'\n", sym->toChars());
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128 //printf("basetype = '%s'\n", sym->basetype->toChars());
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129 return sym.basetype.isintegral();
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130 }
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131
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132 override bool isfloating()
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133 {
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134 return sym.basetype.isfloating();
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135 }
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136
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137 override bool isreal()
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138 {
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139 return sym.basetype.isreal();
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140 }
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141
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142 override bool isimaginary()
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143 {
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144 return sym.basetype.isimaginary();
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145 }
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146
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147 override bool iscomplex()
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148 {
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149 return sym.basetype.iscomplex();
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150 }
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151
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152 override bool isscalar()
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153 {
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154 return sym.basetype.isscalar();
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155 }
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156
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157 override bool isunsigned()
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158 {
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159 return sym.basetype.isunsigned();
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160 }
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161
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162 override bool checkBoolean()
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163 {
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164 return sym.basetype.checkBoolean();
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165 }
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166
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73
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167 override bool isAssignable()
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168 {
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169 return sym.basetype.isAssignable();
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170 }
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171
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172 override Type toBasetype()
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173 {
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174 if (sym.inuse)
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175 {
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176 sym.error("circular definition");
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177 sym.basetype = Type.terror;
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178 return Type.terror;
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179 }
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180 sym.inuse = 1;
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181 Type t = sym.basetype.toBasetype();
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182 sym.inuse = 0;
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183 t = t.addMod(mod);
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184 return t;
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185 }
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186
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187 override MATCH implicitConvTo(Type to)
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188 {
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189 MATCH m;
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190
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191 //printf("TypeTypedef::implicitConvTo(to = %s) %s\n", to->toChars(), toChars());
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192 if (equals(to))
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193 m = MATCHexact; // exact match
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194 else if (sym.basetype.implicitConvTo(to))
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195 m = MATCHconvert; // match with conversions
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196 else if (ty == to.ty && sym == (cast(TypeTypedef)to).sym)
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197 {
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198 m = constConv(to);
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199 }
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200 else
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201 m = MATCHnomatch; // no match
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202 return m;
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203 }
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204
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205 override MATCH constConv(Type to)
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206 {
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207 if (equals(to))
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208 return MATCHexact;
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209 if (ty == to.ty && sym == (cast(TypeTypedef)to).sym)
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210 return sym.basetype.implicitConvTo((cast(TypeTypedef)to).sym.basetype);
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211 return MATCHnomatch;
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212 }
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213
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214 override Expression defaultInit(Loc loc)
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215 {
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216 version (LOGDEFAULTINIT) {
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217 printf("TypeTypedef::defaultInit() '%s'\n", toChars());
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218 }
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219 if (sym.init)
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220 {
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221 //sym->init->toExpression()->print();
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222 return sym.init.toExpression();
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223 }
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224 Type bt = sym.basetype;
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225 Expression e = bt.defaultInit(loc);
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226 e.type = this;
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227 while (bt.ty == Tsarray)
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228 {
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229 TypeSArray tsa = cast(TypeSArray)bt;
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230 e.type = tsa.next;
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231 bt = tsa.next.toBasetype();
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232 }
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233 return e;
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234 }
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235
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236 override bool isZeroInit(Loc loc)
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237 {
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238 if (sym.init)
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239 {
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240 if (sym.init.isVoidInitializer())
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241 return true; // initialize voids to 0
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242 Expression e = sym.init.toExpression();
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243 if (e && e.isBool(false))
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244 return true;
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245
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246 return false; // assume not
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247 }
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248 if (sym.inuse)
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249 {
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250 sym.error("circular definition");
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251 sym.basetype = Type.terror;
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252 }
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253 sym.inuse = 1;
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254 bool result = sym.basetype.isZeroInit(loc);
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255 sym.inuse = 0;
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256
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257 return result;
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258 }
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259
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260 override dt_t** toDt(dt_t** pdt)
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261 {
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262 if (sym.init)
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263 {
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264 dt_t* dt = sym.init.toDt();
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265
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266 while (*pdt)
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267 pdt = &((*pdt).DTnext);
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268 *pdt = dt;
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269 return pdt;
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270 }
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271
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272 sym.basetype.toDt(pdt);
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273 return pdt;
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274 }
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275
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276 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes)
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277 {
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278 // Extra check
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279 if (tparam && tparam.ty == Ttypedef)
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280 {
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281 TypeTypedef tp = cast(TypeTypedef)tparam;
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282
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283 if (sym != tp.sym)
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284 return MATCHnomatch;
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285 }
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286 return Type.deduceType(sc, tparam, parameters, dedtypes);
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287 }
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288
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289 override TypeInfoDeclaration getTypeInfoDeclaration()
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290 {
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291 return new TypeInfoTypedefDeclaration(this);
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292 }
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293
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294 override bool hasPointers()
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295 {
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296 return toBasetype().hasPointers();
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297 }
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298
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299 override int hasWild()
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300 {
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301 return mod & MOD.MODwild || toBasetype().hasWild();
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302 }
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303
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304 override Type toHeadMutable()
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305 {
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306 assert(false);
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307 }
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308
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309 version (CPP_MANGLE) {
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310 void toCppMangle(OutBuffer buf, CppMangleState* cms)
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311 {
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312 assert(false);
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313 }
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314 }
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315
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316 override type* toCtype()
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317 {
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318 return sym.basetype.toCtype();
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319 }
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320
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321 override type* toCParamtype()
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322 {
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323 return sym.basetype.toCParamtype();
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324 }
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325 }
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