Mercurial > projects > dang
annotate sema/AstAction.d @ 150:6c5a3c0bb4fb
Make switch work again
Also added locations to statements (only filled out for switch)
Added a verification pass
Removed some comments
author | Anders Halager <halager@gmail.com> |
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date | Mon, 21 Jul 2008 20:35:03 +0200 |
parents | 6e6355fb5f0f |
children | ee202c72cd30 |
rev | line source |
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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)); |
136 | 34 if(auto t = cast(StaticArrayId)type) |
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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55 |
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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 { |
102
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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 { |
136 | 142 auto res = new FuncDecl(identifierFromTok(type.tok), identifierFromTok(name.tok)); |
143 res.att = att; | |
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 |
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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 -- |
144
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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 |
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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 |
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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 |
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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 |
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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 |
150 | 205 StmtT actOnStartOfSwitchStmt(Token _switch, ExprT exp) |
143
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206 { |
150 | 207 return new SwitchStmt(_switch.location, cast(Exp)exp); |
143
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208 } |
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209 |
150 | 210 void actOnCaseStmt(StmtT stmt, Token _case, ExprT[] exps, StmtT[] stmts) |
143
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211 { |
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212 auto sw = cast(SwitchStmt)stmt; |
150 | 213 sw.addCase(_case.location, cast(Exp[])exps, cast(Stmt[])stmts); |
143
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214 } |
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215 |
150 | 216 void actOnDefaultStmt(StmtT stmt, Token _default, StmtT[] stmts) |
143
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217 { |
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218 auto sw = cast(SwitchStmt)stmt; |
150 | 219 sw.setDefault(_default.location, 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 |
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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 |
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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 |
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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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264 assert(0, "Only valid unary expressions are -x and *x"); |
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265 } |
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266 |
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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 } |
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273 |
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274 ExprT actOnCastExpr(ref Token _cast, Id id, ExprT exp) |
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275 { |
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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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279 } |
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280 |
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281 ExprT |
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282 actOnIndexEpr(ExprT arr, ref Token lb, ExprT index, ref Token rb) |
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283 { |
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284 Exp target = cast(Exp)arr; |
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285 Exp idx = cast(Exp)index; |
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286 return new IndexExp(target, lb.location, idx, rb.location); |
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287 } |
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288 } |
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289 } |
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290 |