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