annotate ast/Decl.d @ 194:08f68d684047

Rename some files. Hopefully we can get a more iterative sema pass, that's a lot easier to "get startet with". Also added support for alias.
author Anders Johnsen <skabet@gmail.com>
date Tue, 29 Jul 2008 13:54:44 +0200
parents 50b98a06a200
children
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1 module ast.Decl;
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2
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3 import ast.Exp,
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4 ast.Stmt;
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5
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6 import lexer.Token;
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7
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8 import tango.io.Stdout;
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9
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10 import sema.Scope,
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11 sema.Symbol,
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12 sema.DType,
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13 sema.VC,
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14 basic.SmallArray,
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15 basic.Attribute;
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16
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17 enum DeclType
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18 {
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19 VarDecl,
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20 DummyDecl,
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21 ImportDecl,
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22 FuncDecl,
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23 StructDecl,
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24 ClassDecl,
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25 InterfaceDecl,
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26 AliasDecl,
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27 }
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28
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29 class Decl
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30 {
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31 this(DeclType declType)
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32 {
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33 this.declType = declType;
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34 }
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36 void simplify()
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37 {
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38 }
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39
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40 void verify(VC vc)
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41 {
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42 }
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43
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44 DType type()
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45 {
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46 if (sym !is null)
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47 return sym.type;
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48 return null;
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49 }
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50
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51 Identifier getIdentifier()
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52 {
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53 switch(declType)
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54 {
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55 case DeclType.VarDecl:
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56 return (cast(VarDecl)this).identifier;
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57 case DeclType.FuncDecl:
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58 return (cast(FuncDecl)this).identifier;
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59 default:
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60 assert(0, "Invalid DeclType for getting a identifier");
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61 }
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62 }
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64 DeclType declType;
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65 Scope env;
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66 Symbol sym;
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67 Attribute att;
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68 }
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69
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70 class DummyDecl : Decl
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71 {
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72 this()
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73 {
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74 super(DeclType.DummyDecl);
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75 }
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76 }
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77
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78 class VarDecl : Decl
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79 {
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80 this(IdentifierTypeExp type, Identifier identifier,
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81 Exp e = null)
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82 {
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83 super(DeclType.VarDecl);
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84 this.varType = type;
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85 this.identifier = identifier;
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86 this.init = e;
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87 }
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88
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89 override DType type()
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90 {
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91 return env.findType(varType.get);
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92 }
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94 Identifier varType, identifier;
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95 Exp init;
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96 }
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97
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98 class ImportDecl : Decl
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99 {
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100 this()
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101 {
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102 super(DeclType.ImportDecl);
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103 }
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104
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105 char[] get()
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106 {
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107 char[] res;
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108 foreach(i ; packages)
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109 res ~= i.get ~ ".";
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110 res ~= name.get;
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111 return res;
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112 }
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113
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114 bool isStatic = false;
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115
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116 Identifier[] packages;
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117 Identifier name;
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118 Identifier aliasedName;
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119
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120 Identifier[2][] explicitSymbols;
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121 }
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122
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123 class FuncDecl : Decl
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124 {
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125 this(IdentifierTypeExp type, Identifier identifier)
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126 {
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127 super(DeclType.FuncDecl);
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128 this.returnType = type;
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129 this.identifier = identifier;
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130 }
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131
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132 void addParam(IdentifierTypeExp type, Identifier name = null)
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133 {
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134 funcArgs ~= new VarDecl(type, name, null);
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135 }
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136
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137 void setBody(CompoundStatement stmts)
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138 {
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139 statements = stmts.statements;
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140 emptyFunction = false;
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141 }
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142
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143 void simplify()
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144 {
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145 /*
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146 if(auto t = env.find(identifier).type.asFunction())
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147 {
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148 if(auto s = cast(DStruct)t.returnType)
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149 {
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150 VarDecl[] funcArgs;
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151 auto i = new Identifier("ret.val");
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152 i.env = env;
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153 i.env.add(i);
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154 i.env.find(i).setType( s );
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155 auto var = new VarDecl(returnType, i);
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156 var.env = env;
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157 funcArgs ~= var;
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158 funcArgs ~= this.funcArgs;
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159 this.funcArgs = funcArgs;
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160 t.returnType = DType.Void;
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161 this.returnType = new Identifier("void");
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162 env.find(identifier).setType(t);
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163 sret = true;
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164
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165 myType = null;
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166 }
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167 }
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168 */
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169
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170 foreach (funcArg; funcArgs)
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171 funcArg.simplify();
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172 foreach (stmt; statements)
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173 stmt.simplify();
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174 }
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175
150
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176 override void verify(VC vc)
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177 {
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178 foreach (stmt; statements)
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179 stmt.verify(vc);
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180 }
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181
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182 override DFunction type()
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183 {
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184 if (myType !is null)
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185 return myType;
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186
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187 auto t = new DFunction(identifier);
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188 if ( identifier.get == "this" )
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189 t.returnType = DType.Void;
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190 else
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191 t.returnType = env.findType(returnType.get);
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192 SmallArray!(DType) array;
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193 foreach (a; funcArgs)
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194 array ~= a.type();
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195 t.params = array.safe();
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196 t.firstParamIsReturnValue = this.sret;
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197 myType = t;
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198 return myType;
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199 }
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200
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201 Identifier returnType, identifier;
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202 VarDecl[] funcArgs;
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203 Stmt[] statements;
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204 bool sret = false;
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06dda301ea61 Can declare outside functions and call c-functions
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205 bool emptyFunction = true;
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206 private DFunction myType;
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207 }
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208
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209 class StructDecl : Decl
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210 {
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211 this(Identifier identifier)
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212 {
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213 super(DeclType.StructDecl);
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214 this.identifier = identifier;
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215 }
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216
102
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217 void addMember(Decl decl)
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218 {
102
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219 decls ~= decl;
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220 }
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221
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222 void simplify()
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223 {
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224 }
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225
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226 override void verify(VC vc)
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227 {
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228 foreach (decl; decls)
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229 decl.verify(vc);
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230 }
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231
63
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232 override DType type()
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233 {
145
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234 return env.findType(identifier.get);
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235 }
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236
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237 Identifier identifier;
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238 Decl[] decls;
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239 private DType myType;
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240 }
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241
144
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242 class ClassDecl : Decl
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243 {
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244 this(Identifier identifier)
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245 {
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246 super(DeclType.ClassDecl);
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247 this.identifier = identifier;
170
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248
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249 auto name = new Identifier(identifier.loc, "__vptr");
173
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250 auto type = new IdentifierTypeExp(identifier.loc, "byte");
172
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251 auto p_type = new PointerTypeExp(type);
170
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252 decls ~= new VarDecl(p_type, name, null);
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253 }
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254
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255 void addMember(Decl decl)
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256 {
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257 decls ~= decl;
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258 }
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259
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260 void addBaseClass(Identifier identifier)
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261 {
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262 baseClasses ~= identifier;
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263 }
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264
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265 void simplify()
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266 {
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267 }
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268
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269 override DType type()
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270 {
145
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271 return env.findType(identifier.get);
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272 }
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273
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274 Identifier identifier;
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275 Identifier[] baseClasses;
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276 Decl[] decls;
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277 private DType myType;
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278 }
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279
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280 class InterfaceDecl : Decl
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281 {
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282 this(Identifier identifier)
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283 {
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284 super(DeclType.InterfaceDecl);
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285 this.identifier = identifier;
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286 }
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287
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288 void addMember(Decl decl)
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289 {
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290 decls ~= decl;
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291 }
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292
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293 void addBaseClass(Identifier identifier)
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294 {
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295 baseClasses ~= identifier;
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296 }
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297
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298 void simplify()
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299 {
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300 }
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301
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302 override DType type()
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303 {
145
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304 return env.findType(identifier.get);
144
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305 }
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306
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307 Identifier identifier;
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308 Identifier[] baseClasses;
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309 Decl[] decls;
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310 private DType myType;
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311 }
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312
194
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313 class AliasDecl : Decl
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314 {
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315 this(Decl decl)
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316 {
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317 super(DeclType.AliasDecl);
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318 this.decl = decl;
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319 }
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320
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321 Decl decl;
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322 }
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323