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0
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1 module dmd.TypeClass;
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2
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3 import dmd.Type;
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4 import dmd.ClassDeclaration;
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5 import dmd.Loc;
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6 import dmd.Dsymbol;
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7 import dmd.Scope;
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8 import dmd.OutBuffer;
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9 import dmd.HdrGenState;
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10 import dmd.Expression;
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11 import dmd.Identifier;
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12 import dmd.MATCH;
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13 import dmd.CppMangleState;
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14 import dmd.ArrayTypes;
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15 import dmd.TypeInfoDeclaration;
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16 import dmd.TY;
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17 import dmd.MOD;
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18 import dmd.Global;
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19 import dmd.TypePointer;
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20 import dmd.Declaration;
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21 import dmd.VarDeclaration;
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22 import dmd.TOK;
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23 import dmd.DotExp;
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24 import dmd.Id;
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25 import dmd.ScopeExp;
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26 import dmd.DotVarExp;
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27 import dmd.VarExp;
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28 import dmd.PtrExp;
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29 import dmd.AddExp;
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30 import dmd.IntegerExp;
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31 import dmd.DotIdExp;
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32 import dmd.EnumMember;
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33 import dmd.TemplateMixin;
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34 import dmd.TemplateDeclaration;
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35 import dmd.TemplateInstance;
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36 import dmd.OverloadSet;
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37 import dmd.DotTypeExp;
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38 import dmd.TupleExp;
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39 import dmd.ClassInfoDeclaration;
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40 import dmd.TypeInfoInterfaceDeclaration;
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41 import dmd.TypeInfoClassDeclaration;
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42 import dmd.Util;
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43 import dmd.NullExp;
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44 import dmd.TypeExp;
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45 import dmd.DotTemplateExp;
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46 import dmd.ErrorExp;
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47 import dmd.ThisExp;
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48 import dmd.CommaExp;
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49
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50 import dmd.expression.Util;
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51 import dmd.backend.Symbol;
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52 import dmd.backend.TYPE;
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53 import dmd.backend.Util;
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54 import dmd.backend.SC;
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55 import dmd.backend.STR;
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56 import dmd.backend.TYM;
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57 import dmd.backend.LIST;
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58 import dmd.backend.Classsym;
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59
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60 import std.string : toStringz;
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61
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62 class TypeClass : Type
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63 {
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64 ClassDeclaration sym;
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65
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66 this(ClassDeclaration sym)
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67 {
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68 super(TY.Tclass);
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69 this.sym = sym;
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70 }
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71
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72 version (DumbClone) {
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73 } else {
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74 Type clone()
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75 {
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76 assert(false);
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77 }
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78 }
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79 ulong size(Loc loc)
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80 {
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81 return PTRSIZE;
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82 }
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83
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84 string toChars()
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85 {
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86 if (mod)
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87 return Type.toChars();
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88 return sym.toPrettyChars();
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89 }
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90
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91 Type syntaxCopy()
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92 {
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93 assert(false);
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94 }
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95
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96 Type semantic(Loc loc, Scope sc)
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97 {
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98 //printf("TypeClass.semantic(%s)\n", sym.toChars());
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99 if (deco)
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100 return this;
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101 //printf("\t%s\n", merge().deco);
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102 return merge();
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103 }
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104
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105 Dsymbol toDsymbol(Scope sc)
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106 {
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107 return sym;
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108 }
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109
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110 void toDecoBuffer(OutBuffer buf, int flag)
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111 {
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112 string name = sym.mangle();
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113 //printf("TypeClass.toDecoBuffer('%s' flag=%d mod=%x) = '%s'\n", toChars(), flag, mod, name);
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114 Type.toDecoBuffer(buf, flag);
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115 buf.printf("%s", name);
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116 }
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117
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118 void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod)
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119 {
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120 if (mod != this.mod)
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121 {
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122 toCBuffer3(buf, hgs, mod);
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123 return;
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124 }
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125 buf.writestring(sym.toChars());
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126 }
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127
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128 Expression dotExp(Scope sc, Expression e, Identifier ident)
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129 {
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130 uint offset;
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131
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132 Expression b;
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133 VarDeclaration v;
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134 Dsymbol s;
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135
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136 version (LOGDOTEXP) {
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137 printf("TypeClass.dotExp(e='%s', ident='%s')\n", e.toChars(), ident.toChars());
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138 }
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139
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140 if (e.op == TOK.TOKdotexp)
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141 {
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142 DotExp de = cast(DotExp)e;
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143
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144 if (de.e1.op == TOK.TOKimport)
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145 {
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146 ScopeExp se = cast(ScopeExp)de.e1;
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147
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148 s = se.sds.search(e.loc, ident, 0);
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149 e = de.e1;
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150 goto L1;
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151 }
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152 }
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153
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154 if (ident is Id.tupleof_)
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155 {
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156 /* Create a TupleExp
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157 */
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158 e = e.semantic(sc); // do this before turning on noaccesscheck
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159 Expressions exps = new Expressions;
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160 exps.reserve(sym.fields.dim);
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161 for (size_t i = 0; i < sym.fields.dim; i++)
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162 {
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163 VarDeclaration v2 = cast(VarDeclaration)sym.fields.data[i];
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164 Expression fe = new DotVarExp(e.loc, e, v2);
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165 exps.push(cast(void*)fe);
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166 }
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167 e = new TupleExp(e.loc, exps);
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168 sc = sc.push();
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169 sc.noaccesscheck = 1;
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170 e = e.semantic(sc);
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171 sc.pop();
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172 return e;
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173 }
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174
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175 s = sym.search(e.loc, ident, 0);
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176 L1:
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177 if (!s)
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178 {
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179 // See if it's a base class
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180 ClassDeclaration cbase;
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181 for (cbase = sym.baseClass; cbase; cbase = cbase.baseClass)
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182 {
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183 if (cbase.ident.equals(ident))
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184 {
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185 e = new DotTypeExp(Loc(0), e, cbase);
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186 return e;
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187 }
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188 }
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189
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190 if (ident is Id.classinfo_)
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191 {
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192 assert(ClassDeclaration.classinfo);
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193 Type t = ClassDeclaration.classinfo.type;
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194 if (e.op == TOK.TOKtype || e.op == TOK.TOKdottype)
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195 {
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196 /* For type.classinfo, we know the classinfo
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197 * at compile time.
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198 */
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199 if (!sym.vclassinfo)
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200 sym.vclassinfo = new ClassInfoDeclaration(sym);
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201
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202 e = new VarExp(e.loc, sym.vclassinfo);
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203 e = e.addressOf(sc);
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204 e.type = t; // do this so we don't get redundant dereference
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205 }
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206 else
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207 {
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208 /* For class objects, the classinfo reference is the first
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209 * entry in the vtbl[]
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210 */
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211 e = new PtrExp(e.loc, e);
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212 e.type = t.pointerTo();
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213 if (sym.isInterfaceDeclaration())
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214 {
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215 if (sym.isCPPinterface())
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216 {
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217 /* C++ interface vtbl[]s are different in that the
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218 * first entry is always pointer to the first virtual
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219 * function, not classinfo.
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220 * We can't get a .classinfo for it.
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221 */
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222 error(e.loc, "no .classinfo for C++ interface objects");
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223 }
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224 /* For an interface, the first entry in the vtbl[]
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225 * is actually a pointer to an instance of struct Interface.
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226 * The first member of Interface is the .classinfo,
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227 * so add an extra pointer indirection.
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228 */
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229 e.type = e.type.pointerTo();
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230 e = new PtrExp(e.loc, e);
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231 e.type = t.pointerTo();
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232 }
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233 e = new PtrExp(e.loc, e, t);
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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 if (ident is Id.__vptr)
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239 {
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240 /* The pointer to the vtbl[]
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241 * *cast(invariant(void*)**)e
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242 */
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243 e = e.castTo(sc, tvoidptr.invariantOf().pointerTo().pointerTo());
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244 e = new PtrExp(e.loc, e);
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245 e = e.semantic(sc);
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246 return e;
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247 }
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248
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249 if (ident is Id.__monitor)
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250 { /* The handle to the monitor (call it a void*)
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251 * *(cast(void**)e + 1)
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252 */
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253 e = e.castTo(sc, tvoidptr.pointerTo());
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254 e = new AddExp(e.loc, e, new IntegerExp(1));
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255 e = new PtrExp(e.loc, e);
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256 e = e.semantic(sc);
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257 return e;
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258 }
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259
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260 if (ident is Id.typeinfo_)
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261 {
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262 if (!global.params.useDeprecated)
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263 error(e.loc, ".typeinfo deprecated, use typeid(type)");
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264
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265 return getTypeInfo(sc);
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266 }
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267 if (ident is Id.outer && sym.vthis)
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268 {
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269 s = sym.vthis;
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270 }
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271 else
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272 {
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273 if (ident !is Id.__sizeof &&
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274 ident !is Id.alignof_ &&
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275 ident !is Id.init_ &&
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276 ident !is Id.mangleof_ &&
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277 ident !is Id.stringof_ &&
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278 ident !is Id.offsetof)
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279 {
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280 /* See if we should forward to the alias this.
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281 */
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282 if (sym.aliasthis)
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283 {
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284 /* Rewrite e.ident as:
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285 * e.aliasthis.ident
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286 */
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287 e = new DotIdExp(e.loc, e, sym.aliasthis.ident);
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288 e = new DotIdExp(e.loc, e, ident);
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289 return e.semantic(sc);
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290 }
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291
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292 /* Look for overloaded opDot() to see if we should forward request
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293 * to it.
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294 */
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295 Dsymbol fd = search_function(sym, Id.opDot);
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296 if (fd)
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297 {
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298 /* Rewrite e.ident as:
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299 * e.opId().ident
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300 */
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301 e = build_overload(e.loc, sc, e, null, fd.ident);
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302 e = new DotIdExp(e.loc, e, ident);
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303 return e.semantic(sc);
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304 }
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305 }
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306
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307 return Type.dotExp(sc, e, ident);
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308 }
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309 }
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310
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311 if (!s.isFuncDeclaration()) // because of overloading
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312 s.checkDeprecated(e.loc, sc);
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313
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314 s = s.toAlias();
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315 v = s.isVarDeclaration();
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316
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317 if (v && !v.isDataseg())
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318 {
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319 Expression ei = v.getConstInitializer();
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320
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321 if (ei)
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322 {
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323 e = ei.copy(); // need to copy it if it's a StringExp
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324 e = e.semantic(sc);
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325 return e;
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326 }
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327 }
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328
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329 if (s.getType())
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330 {
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331 // if (e.op == TOKtype)
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332 return new TypeExp(e.loc, s.getType());
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333 // return new DotTypeExp(e.loc, e, s);
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334 }
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335
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336 EnumMember em = s.isEnumMember();
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337 if (em)
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338 {
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339 assert(em.value);
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340 return em.value.copy();
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341 }
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342
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343 TemplateMixin tm = s.isTemplateMixin();
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344 if (tm)
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345 {
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346 Expression de = new DotExp(e.loc, e, new ScopeExp(e.loc, tm));
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347 de.type = e.type;
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348 return de;
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349 }
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350
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351 TemplateDeclaration td = s.isTemplateDeclaration();
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352 if (td)
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353 {
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354 e = new DotTemplateExp(e.loc, e, td);
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355 e.semantic(sc);
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356 return e;
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357 }
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358
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359 TemplateInstance ti = s.isTemplateInstance();
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360 if (ti)
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361 {
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362 if (!ti.semanticRun)
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363 ti.semantic(sc);
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364 s = ti.inst.toAlias();
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365 if (!s.isTemplateInstance())
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366 goto L1;
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367 Expression de = new DotExp(e.loc, e, new ScopeExp(e.loc, ti));
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368 de.type = e.type;
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369 return de;
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370 }
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371
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372 OverloadSet o = s.isOverloadSet();
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373 if (o)
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374 {
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375 /* We really should allow this
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376 */
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377 error(e.loc, "overload set for %s.%s not allowed in struct declaration", e.toChars(), ident.toChars());
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378 return new ErrorExp();
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379 }
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380
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381 Declaration d = s.isDeclaration();
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382 if (!d)
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383 {
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384 e.error("%s.%s is not a declaration", e.toChars(), ident.toChars());
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385 return new ErrorExp();
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386 }
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387
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388 if (e.op == TOK.TOKtype)
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389 {
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390 /* It's:
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391 * Class.d
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392 */
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393 if (d.isTupleDeclaration())
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394 {
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395 e = new TupleExp(e.loc, d.isTupleDeclaration());
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396 e = e.semantic(sc);
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397 return e;
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398 }
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399 else if (d.needThis() && (hasThis(sc) || !d.isFuncDeclaration()))
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400 {
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401 if (sc.func)
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402 {
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403 ClassDeclaration thiscd;
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404 thiscd = sc.func.toParent().isClassDeclaration();
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405
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406 if (thiscd)
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407 {
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408 ClassDeclaration cd = e.type.isClassHandle();
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409
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410 if (cd is thiscd)
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411 {
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412 e = new ThisExp(e.loc);
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413 e = new DotTypeExp(e.loc, e, cd);
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414 DotVarExp de = new DotVarExp(e.loc, e, d);
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415 e = de.semantic(sc);
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416 return e;
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417 }
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418 else if ((!cd || !cd.isBaseOf(thiscd, null)) && !d.isFuncDeclaration())
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419 e.error("'this' is required, but %s is not a base class of %s", e.type.toChars(), thiscd.toChars());
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420 }
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421 }
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422
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423 /* Rewrite as:
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424 * this.d
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425 */
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426 DotVarExp de = new DotVarExp(e.loc, new ThisExp(e.loc), d);
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427 e = de.semantic(sc);
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428 return e;
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429 }
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430 else
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431 {
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432 VarExp ve = new VarExp(e.loc, d, 1);
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433 return ve;
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434 }
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435 }
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436
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437 if (d.isDataseg())
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438 {
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439 // (e, d)
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440 accessCheck(e.loc, sc, e, d);
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441 VarExp ve = new VarExp(e.loc, d);
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442 e = new CommaExp(e.loc, e, ve);
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443 e.type = d.type;
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444 return e;
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445 }
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446
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447 if (d.parent && d.toParent().isModule())
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448 {
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|
|
449 // (e, d)
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|
|
450 VarExp ve = new VarExp(e.loc, d, 1);
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|
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451 e = new CommaExp(e.loc, e, ve);
|
|
|
452 e.type = d.type;
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|
|
453 return e;
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|
454 }
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455
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456 DotVarExp de = new DotVarExp(e.loc, e, d);
|
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457 return de.semantic(sc);
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|
|
458 }
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|
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459
|
|
|
460 ClassDeclaration isClassHandle()
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461 {
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|
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462 return sym;
|
|
|
463 }
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|
|
464
|
|
|
465 bool isBaseOf(Type t, int* poffset)
|
|
|
466 {
|
|
56
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467 if (t.ty == Tclass)
|
|
|
468 {
|
|
|
469 ClassDeclaration cd;
|
|
|
470
|
|
|
471 cd = (cast(TypeClass)t).sym;
|
|
|
472 if (sym.isBaseOf(cd, poffset))
|
|
|
473 return true;
|
|
|
474 }
|
|
|
475
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|
476 return false;
|
|
0
|
477 }
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|
|
478
|
|
|
479 MATCH implicitConvTo(Type to)
|
|
|
480 {
|
|
|
481 //printf("TypeClass.implicitConvTo(to = '%s') %s\n", to.toChars(), toChars());
|
|
|
482 MATCH m = constConv(to);
|
|
|
483 if (m != MATCH.MATCHnomatch)
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|
|
484 return m;
|
|
|
485
|
|
|
486 ClassDeclaration cdto = to.isClassHandle();
|
|
|
487 if (cdto && cdto.isBaseOf(sym, null))
|
|
|
488 {
|
|
|
489 //printf("'to' is base\n");
|
|
|
490 return MATCH.MATCHconvert;
|
|
|
491 }
|
|
|
492
|
|
|
493 if (global.params.Dversion == 1)
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|
|
494 {
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|
|
495 // Allow conversion to (void *)
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|
496 if (to.ty == TY.Tpointer && (cast(TypePointer)to).next.ty == TY.Tvoid)
|
|
|
497 return MATCH.MATCHconvert;
|
|
|
498 }
|
|
|
499
|
|
|
500 m = MATCH.MATCHnomatch;
|
|
|
501 if (sym.aliasthis)
|
|
|
502 {
|
|
|
503 Declaration d = sym.aliasthis.isDeclaration();
|
|
|
504 if (d)
|
|
|
505 {
|
|
|
506 assert(d.type);
|
|
|
507 Type t = d.type.addMod(mod);
|
|
|
508 m = t.implicitConvTo(to);
|
|
|
509 }
|
|
|
510 }
|
|
|
511
|
|
|
512 return m;
|
|
|
513 }
|
|
|
514
|
|
|
515 Expression defaultInit(Loc loc)
|
|
|
516 {
|
|
|
517 version (LOGDEFAULTINIT) {
|
|
|
518 printf("TypeClass::defaultInit() '%s'\n", toChars());
|
|
|
519 }
|
|
|
520 Expression e = new NullExp(loc);
|
|
|
521 e.type = this;
|
|
|
522 return e;
|
|
|
523 }
|
|
|
524
|
|
|
525 bool isZeroInit(Loc loc)
|
|
|
526 {
|
|
|
527 return true;
|
|
|
528 }
|
|
|
529
|
|
|
530 MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes)
|
|
|
531 {
|
|
|
532 assert(false);
|
|
|
533 }
|
|
|
534
|
|
|
535 bool isauto()
|
|
|
536 {
|
|
|
537 return sym.isauto;
|
|
|
538 }
|
|
|
539
|
|
|
540 bool checkBoolean()
|
|
|
541 {
|
|
|
542 return true;
|
|
|
543 }
|
|
|
544
|
|
|
545 TypeInfoDeclaration getTypeInfoDeclaration()
|
|
|
546 {
|
|
|
547 if (sym.isInterfaceDeclaration())
|
|
|
548 return new TypeInfoInterfaceDeclaration(this);
|
|
|
549 else
|
|
|
550 return new TypeInfoClassDeclaration(this);
|
|
|
551 }
|
|
|
552
|
|
|
553 bool hasPointers()
|
|
|
554 {
|
|
|
555 return true;
|
|
|
556 }
|
|
|
557
|
|
|
558 bool builtinTypeInfo()
|
|
|
559 {
|
|
|
560 /* This is statically put out with the ClassInfo, so
|
|
|
561 * claim it is built in so it isn't regenerated by each module.
|
|
|
562 */
|
|
|
563 version (DMDV2) {
|
|
|
564 return mod ? false : true;
|
|
|
565 } else {
|
|
|
566 return true;
|
|
|
567 }
|
|
|
568 }
|
|
|
569
|
|
|
570 version (DMDV2) {
|
|
|
571 Type toHeadMutable()
|
|
|
572 {
|
|
|
573 assert(false);
|
|
|
574 }
|
|
|
575
|
|
|
576 MATCH constConv(Type to)
|
|
|
577 {
|
|
|
578 if (equals(to))
|
|
|
579 return MATCH.MATCHexact;
|
|
|
580
|
|
|
581 if (ty == to.ty && sym == (cast(TypeClass)to).sym && to.mod == MOD.MODconst)
|
|
|
582 return MATCH.MATCHconst;
|
|
|
583
|
|
|
584 return MATCH.MATCHnomatch;
|
|
|
585 }
|
|
|
586
|
|
|
587 version (CPP_MANGLE) {
|
|
|
588 void toCppMangle(OutBuffer buf, CppMangleState* cms)
|
|
|
589 {
|
|
|
590 assert(false);
|
|
|
591 }
|
|
|
592 }
|
|
|
593 }
|
|
|
594
|
|
|
595 type* toCtype()
|
|
|
596 {
|
|
|
597 type* t;
|
|
|
598 Symbol* s;
|
|
|
599
|
|
|
600 //printf("TypeClass.toCtype() %s\n", toChars());
|
|
|
601 if (ctype)
|
|
|
602 return ctype;
|
|
|
603
|
|
|
604 /* Need this symbol to do C++ name mangling
|
|
|
605 */
|
|
|
606 string name = sym.isCPPinterface() ? sym.ident.toChars() : sym.toPrettyChars();
|
|
|
607 s = symbol_calloc(toStringz(name));
|
|
|
608 s.Sclass = SC.SCstruct;
|
|
|
609 s.Sstruct = struct_calloc();
|
|
|
610 s.Sstruct.Sflags |= STR.STRclass;
|
|
|
611 s.Sstruct.Salignsize = sym.alignsize;
|
|
|
612 s.Sstruct.Sstructalign = cast(ubyte)sym.structalign;
|
|
|
613 s.Sstruct.Sstructsize = sym.structsize;
|
|
|
614
|
|
|
615 t = type_alloc(TYM.TYstruct);
|
|
|
616 t.Ttag = cast(Classsym*)s; // structure tag name
|
|
|
617 t.Tcount++;
|
|
|
618 s.Stype = t;
|
|
|
619 slist_add(s);
|
|
|
620
|
|
|
621 t = type_allocn(TYM.TYnptr, t);
|
|
|
622
|
|
|
623 t.Tcount++;
|
|
|
624 ctype = t;
|
|
|
625
|
|
|
626 /* Add in fields of the class
|
|
|
627 * (after setting ctype to avoid infinite recursion)
|
|
|
628 */
|
|
|
629 if (global.params.symdebug)
|
|
|
630 for (int i = 0; i < sym.fields.dim; i++)
|
|
|
631 {
|
|
|
632 VarDeclaration v = cast(VarDeclaration)sym.fields.data[i];
|
|
|
633
|
|
|
634 Symbol* s2 = symbol_name(toStringz(v.ident.toChars()), SC.SCmember, v.type.toCtype());
|
|
|
635 s2.Smemoff = v.offset;
|
|
|
636 list_append(&s.Sstruct.Sfldlst, s2);
|
|
|
637 }
|
|
|
638
|
|
|
639 return t;
|
|
|
640 }
|
|
|
641
|
|
|
642 Symbol* toSymbol()
|
|
|
643 {
|
|
|
644 return sym.toSymbol();
|
|
|
645 }
|
|
|
646 } |
