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annotate sema/AstAction.d @ 144:6e6355fb5f0f

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- Parsing nested attributes. - Creating classes and interfaces in AST. - Updated AstPrinter to print attributes, classes and interfaces.
author Anders Johnsen <skabet@gmail.com>
date Mon, 21 Jul 2008 17:41:40 +0200
parents d76cc5cad4fc
children 393a1f47a6d2 6c5a3c0bb4fb
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1 module sema.AstAction;
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2
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3 import Integer = tango.text.convert.Integer;
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4
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5 import lexer.Token;
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6
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7 import basic.SourceManager,
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8 basic.Attribute;
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9
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10 import ast.Module,
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11 ast.Exp,
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12 ast.Stmt,
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13 ast.Decl;
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14
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15 public
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16 import parser.Action;
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17
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18 /**
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19 This class implements the default actions for Dang, by building up an AST
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20 with the data needed in a compiler.
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21 */
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22 class AstAction : Action
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23 {
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24 this(SourceManager sm)
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25 {
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26 this.sm = sm;
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27 }
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28 private SourceManager sm;
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29
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30 private Identifier handleType(Id type)
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31 {
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32 if(auto t = cast(PointerId)type)
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33 return new PointerIdentifier(handleType(t.id));
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34 if(auto t = cast(StaticArrayId)type)
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35 return new StaticArrayIdentifier(handleType(t.id), cast(IntegerLit)t.number);
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36 else
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37 return identifierFromTok(type.tok);
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38 }
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39
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40 private Identifier identifierFromTok(Token t)
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41 {
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42 return new Identifier(t.location, sm.getText(t.asRange));
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43 }
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44 override
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45 {
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46 ModuleT actOnModule(ref Token _module, char[] name)
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47 {
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48 return new Module(name);
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49 }
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50
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51 ModuleT actOnImplicitModule(SLoc startLoc, char[] name)
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52 {
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53 return new Module(name);
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54 }
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56 void actOnModuleDecl(ModuleT m, DeclT d)
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57 {
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58 (cast(Module)m).addDecl(cast(Decl)d);
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59 }
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60
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61 // -- Declarations --
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62 DeclT actOnImport(ref Token _, ref ModuleName target, Id* name)
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63 {
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64 auto res = new ImportDecl;
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65 Identifier[] packages = new Identifier[target.packages.length];
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66 foreach (i, v; target.packages)
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67 packages[i] = identifierFromTok(v.tok);
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68 res.packages = packages;
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69
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70 res.name = identifierFromTok(target.id.tok);
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71 if (name !is null)
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72 res.aliasedName = identifierFromTok(name.tok);
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73 return res;
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74 }
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75
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76 void addSelectiveImport(DeclT _import, ref Id target, Id* name)
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77 {
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78 auto d = cast(ImportDecl)_import;
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79 Identifier t = identifierFromTok(target.tok);
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80 Identifier n = t;
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81 if (name !is null)
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82 n = identifierFromTok(name.tok);
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83 d.explicitSymbols ~= [t, n];
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84 }
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85
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86 DeclT actOnDeclarator(ref Id type, ref Id id, ExprT init, Attribute att)
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87 {
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88 Decl d;
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89 Exp exp = cast(Exp)init;
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90 if (type.tok.type == Tok.Struct)
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91 d = new StructDecl(identifierFromTok(id.tok));
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92 else if (type.tok.type == Tok.Class)
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93 d = new ClassDecl(identifierFromTok(id.tok));
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94 else if (type.tok.type == Tok.Interface)
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95 d = new InterfaceDecl(identifierFromTok(id.tok));
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96 else
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97 d = new VarDecl(handleType(type), identifierFromTok(id.tok), exp);
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98
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99 d.att = att;
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100 return d;
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101 }
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102
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103 void actOnStructMember(DeclT st_decl, DeclT m_decl) //ref Id type, ref Id name, ExprT init)
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104 {
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105 StructDecl st = cast(StructDecl)st_decl;
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106 st.addMember(cast(Decl)m_decl);
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107 }
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108
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109 void actOnClassMember(DeclT cl_decl, DeclT m_decl)
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110 {
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111 ClassDecl cl = cast(ClassDecl)cl_decl;
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112 cl.addMember(cast(Decl)m_decl);
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113 }
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114
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115 void actOnClassBaseClass(DeclT cl_decl, ref Id name)
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116 {
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117 ClassDecl cl = cast(ClassDecl)cl_decl;
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118 cl.addBaseClass(identifierFromTok(name.tok));
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119 }
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120
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121 void actOnInterfaceMember(DeclT if_decl, DeclT m_decl)
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122 {
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123 InterfaceDecl inf = cast(InterfaceDecl)if_decl;
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124 inf.addMember(cast(Decl)m_decl);
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125 }
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126
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127 void actOnInterfaceBaseClass(DeclT if_decl, ref Id name)
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128 {
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129 InterfaceDecl inf = cast(InterfaceDecl)if_decl;
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130 inf.addBaseClass(identifierFromTok(name.tok));
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131 }
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132
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133 ExprT actOnMemberReference(ExprT lhs, SLoc op, Id member)
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134 {
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135 Exp exp = cast(Exp)lhs;
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136 Identifier id = identifierFromTok(member.tok);
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137 return new MemberReference(op, exp, id);
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138 }
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139
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140 DeclT actOnStartOfFunctionDef(ref Id type, ref Id name, Attribute att)
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141 {
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142 auto res = new FuncDecl(identifierFromTok(type.tok), identifierFromTok(name.tok));
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143 res.att = att;
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144 return res;
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145 }
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146
144
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147 void addFuncArg(DeclT func, Id type, Id name)
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148 {
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149 FuncDecl fd = cast(FuncDecl)func;
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150 if(name)
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151 fd.addParam(handleType(type), identifierFromTok(name.tok));
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152 else
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153 fd.addParam(identifierFromTok(type.tok));
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154 }
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155
144
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156 DeclT actOnEndOfFunction(DeclT func, StmtT stmts)
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157 {
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158 FuncDecl fd = cast(FuncDecl)func;
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159 fd.setBody(cast(CompoundStatement)stmts);
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160 return fd;
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161 }
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162
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163 // -- Statements --
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164 StmtT actOnCompoundStmt(ref Token l, ref Token r, StmtT[] stmts)
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165 {
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166 Stmt[] statements = cast(Stmt[])stmts;
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167 return new CompoundStatement(statements.dup);
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168 }
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169
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170 StmtT actOnExprStmt(ExprT exp)
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171 {
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172 return new ExpStmt(cast(Exp)exp);
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173 }
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174
144
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175 StmtT actOnReturnStmt(ref Token loc, ExprT exp)
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176 {
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177 Exp e = cast(Exp)exp;
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178 auto res = new ReturnStmt;
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179 res.exp = e;
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180 return res;
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181 }
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182
144
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183 StmtT actOnIfStmt(ref Token ifTok, ExprT cond, StmtT thenBody,
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184 ref Token elseTok, StmtT elseBody)
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185 {
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186 Exp c = cast(Exp)cond;
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187 Stmt t = cast(Stmt)thenBody;
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188 Stmt e = cast(Stmt)elseBody;
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189 return new IfStmt(c, t, e);
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190 }
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191
144
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192 StmtT actOnWhileStmt(ref Token tok, ExprT cond, StmtT whileBody)
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193 {
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194 Exp c = cast(Exp)cond;
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195 Stmt b = cast(Stmt)whileBody;
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196 return new WhileStmt(c, b);
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197 }
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198
144
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199 StmtT actOnDeclStmt(DeclT decl)
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200 {
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201 Decl d = cast(Decl)decl;
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202 return new DeclStmt(d);
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203 }
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204
144
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205 StmtT actOnStartOfSwitchStmt(ExprT exp)
143
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206 {
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207 return new SwitchStmt(cast(Exp)exp);
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208 }
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209
144
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210 void actOnCaseStmt(StmtT stmt, ExprT[] exps, StmtT[] stmts)
143
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211 {
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212 auto sw = cast(SwitchStmt)stmt;
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213 sw.addCase(cast(Exp[])exps, cast(Stmt[])stmts);
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214 }
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215
144
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216 void actOnDefaultStmt(StmtT stmt, StmtT[] stmts)
143
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217 {
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218 auto sw = cast(SwitchStmt)stmt;
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219 sw.setDefault(cast(Stmt[])stmts);
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220 }
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221
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222 // -- Expressions --
144
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223 ExprT actOnNumericConstant(Token c)
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224 {
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225 return new IntegerLit(c.location, sm.getText(c.asRange));
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226 }
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227
144
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228 ExprT actOnStringExp(Token s)
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229 {
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230 return new StringExp(s.location, sm.getText(s.asRange));
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231 }
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232
144
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233 ExprT actOnIdentifierExp(Id id)
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234 {
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235 return identifierFromTok(id.tok);
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236 }
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237
144
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238 ExprT actOnBinaryOp(SLoc op_loc, Operator op, ExprT l, ExprT r)
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239 {
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240 Exp left = cast(Exp)l;
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241 Exp right = cast(Exp)r;
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242 switch(op)
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243 {
126
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244 case Operator.Assign:
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245 case Operator.AddAssign:
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246 case Operator.SubAssign:
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247 case Operator.MulAssign:
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248 case Operator.DivAssign:
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249 case Operator.ModAssign:
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250 return new AssignExp(op_loc, cast(BinaryExp.Operator)op, left, right);
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251 default:
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252 BinaryExp.Operator bin_op = cast(BinaryExp.Operator)op;
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253 return new BinaryExp(op_loc, bin_op, left, right);
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254 }
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255 }
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256
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257 ExprT actOnUnaryOp(Token op, ExprT operand)
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258 {
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259 Exp target = cast(Exp)operand;
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260 if (op.type == Tok.Minus)
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261 return new NegateExp(op.location, target);
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262 if (op.type == Tok.Star)
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263 return new DerefExp(op.location, target);
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diff changeset
264 assert(0, "Only valid unary expressions are -x and *x");
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265 }
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266
144
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267 ExprT actOnCallExpr(ExprT fn, ref Token, ExprT[] args, ref Token)
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268 {
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269 Exp f = cast(Exp)fn;
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270 Exp[] arguments = cast(Exp[])args.dup;
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271 return new CallExp(f, arguments);
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272 }
68
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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273
144
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274 ExprT actOnCastExpr(ref Token _cast, Id id, ExprT exp)
68
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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275 {
88
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276 Exp target = cast(Exp)exp;
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277 Identifier target_type = identifierFromTok(id.tok);
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278 return new CastExp(_cast.location, target_type, target);
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381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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279 }
83
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280
144
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diff changeset
281 ExprT
88
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282 actOnIndexEpr(ExprT arr, ref Token lb, ExprT index, ref Token rb)
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9e90694f5da0 Parse array indexing, and allow reading from arrays
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parents: 82
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283 {
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eb5b2c719a39 Major change to locations, tokens and expressions.
Anders Halager <halager@gmail.com>
parents: 86
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284 Exp target = cast(Exp)arr;
eb5b2c719a39 Major change to locations, tokens and expressions.
Anders Halager <halager@gmail.com>
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285 Exp idx = cast(Exp)index;
eb5b2c719a39 Major change to locations, tokens and expressions.
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286 return new IndexExp(target, lb.location, idx, rb.location);
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parents: 82
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287 }
51
c96cdcbdb9d6 Rearranged some stuff, and renamed LLVMGen -> CodeGen
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288 }
144
6e6355fb5f0f - Parsing nested attributes.
Anders Johnsen <skabet@gmail.com>
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289 }
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9e90694f5da0 Parse array indexing, and allow reading from arrays
Anders Halager <halager@gmail.com>
parents: 82
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290