Mercurial > projects > dang
annotate sema/Visitor.d @ 22:e331e4e816e4
now handling structs to some extend
| author | johnsen@johnsen-laptop |
|---|---|
| date | Fri, 18 Apr 2008 23:45:45 +0200 |
| parents | 642c6a998fd9 |
| children | 69464d465284 |
| rev | line source |
|---|---|
| 1 | 1 module sema.Visitor; |
| 2 | |
| 3 import tango.io.Stdout; | |
| 4 | |
| 5 public | |
| 6 import ast.Decl, | |
| 7 ast.Stmt, | |
| 8 ast.Exp; | |
| 9 | |
| 10 import lexer.Token; | |
| 11 | |
| 12 class Visitor(FinalT = int, DeclT = FinalT, StmtT = DeclT, ExpT = StmtT) | |
| 13 { | |
| 14 public: | |
| 15 FinalT visit(Decl[] decls) | |
| 16 { | |
| 17 foreach (decl; decls) | |
| 18 visitDecl(decl); | |
| 19 static if (is(FinalT == void)) | |
| 20 return; | |
| 21 else | |
| 22 return FinalT.init; | |
| 23 } | |
| 24 | |
| 25 DeclT visitDecl(Decl decl) | |
| 26 { | |
| 27 switch(decl.declType) | |
| 28 { | |
| 29 case DeclType.FuncDecl: | |
| 30 return visitFuncDecl(cast(FuncDecl)decl); | |
| 31 case DeclType.VarDecl: | |
| 32 return visitVarDecl(cast(VarDecl)decl); | |
| 22 | 33 case DeclType.StructDecl: |
| 34 return visitStructDecl(cast(StructDecl)decl); | |
| 1 | 35 default: |
| 36 throw new Exception("Unknown declaration type"); | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 StmtT visitStmt(Stmt stmt) | |
| 41 { | |
| 42 switch(stmt.stmtType) | |
| 43 { | |
| 44 case StmtType.Return: | |
| 45 return visitReturnStmt(cast(ReturnStmt)stmt); | |
| 46 case StmtType.Decl: | |
| 47 return visitDeclStmt(cast(DeclStmt)stmt); | |
| 48 case StmtType.Exp: | |
| 49 return visitExpStmt(cast(ExpStmt)stmt); | |
|
5
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
50 case StmtType.If: |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
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51 return visitIfStmt(cast(IfStmt)stmt); |
|
11
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
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52 case StmtType.While: |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
53 return visitWhileStmt(cast(WhileStmt)stmt); |
| 1 | 54 default: |
| 55 throw new Exception("Unknown statement type"); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 ExpT visitExp(Exp exp) | |
| 60 { | |
| 61 switch(exp.expType) | |
| 62 { | |
| 63 case ExpType.Binary: | |
| 64 return visitBinaryExp(cast(BinaryExp)exp); | |
| 65 case ExpType.IntegerLit: | |
| 66 return visitIntegerLit(cast(IntegerLit)exp); | |
| 67 case ExpType.Negate: | |
| 68 return visitNegateExp(cast(NegateExp)exp); | |
| 69 case ExpType.AssignExp: | |
| 70 return visitAssignExp(cast(AssignExp)exp); | |
| 71 case ExpType.CallExp: | |
| 72 return visitCallExp(cast(CallExp)exp); | |
| 73 case ExpType.Identifier: | |
| 74 return visitIdentifier(cast(Identifier)exp); | |
| 75 default: | |
| 76 throw new Exception("Unknown expression type"); | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 // Declarations: | |
| 81 DeclT visitVarDecl(VarDecl d) | |
| 82 { | |
| 83 visitExp(d.type); | |
| 84 visitExp(d.identifier); | |
| 85 if (d.init) | |
| 86 visitExp(d.init); | |
| 87 | |
| 88 static if (is(DeclT == void)) | |
| 89 return; | |
| 90 else | |
| 91 return DeclT.init; | |
| 92 } | |
| 93 | |
| 94 DeclT visitFuncDecl(FuncDecl f) | |
| 95 { | |
| 96 visitExp(f.type); | |
| 97 visitExp(f.identifier); | |
| 98 foreach (arg; f.funcArgs) | |
| 99 visitDecl(arg); | |
| 100 foreach (stmt; f.statements) | |
| 101 visitStmt(stmt); | |
| 102 | |
| 103 static if (is(DeclT == void)) | |
| 104 return; | |
| 105 else | |
| 106 return DeclT.init; | |
| 107 } | |
| 108 | |
| 22 | 109 DeclT visitStructDecl(StructDecl s) |
| 110 { | |
| 111 visitExp(s.identifier); | |
| 112 | |
| 113 foreach (arg; s.vars) | |
| 114 visitDecl(arg); | |
| 115 | |
| 116 static if (is(DeclT == void)) | |
| 117 return; | |
| 118 else | |
| 119 return DeclT.init; | |
| 120 } | |
| 121 | |
| 1 | 122 // Statements: |
| 123 StmtT visitReturnStmt(ReturnStmt s) | |
| 124 { | |
| 125 visitExp(s.exp); | |
| 126 static if (is(StmtT == void)) | |
| 127 return; | |
| 128 else | |
| 129 return StmtT.init; | |
| 130 } | |
| 131 | |
| 132 StmtT visitDeclStmt(DeclStmt d) | |
| 133 { | |
| 134 visitDecl(d.decl); | |
| 135 static if (is(StmtT == void)) | |
| 136 return; | |
| 137 else | |
| 138 return StmtT.init; | |
| 139 } | |
| 140 | |
|
5
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
141 StmtT visitIfStmt(IfStmt s) |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
142 { |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
143 visitExp(s.cond); |
|
11
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
144 foreach (stmt; s.then_body) |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
145 visitStmt(stmt); |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
146 foreach (stmt; s.else_body) |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
147 visitStmt(stmt); |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
148 static if (is(StmtT == void)) |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
149 return; |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
150 else |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
151 return StmtT.init; |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
152 } |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
153 |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
154 StmtT visitWhileStmt(WhileStmt s) |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
155 { |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
156 visitExp(s.cond); |
|
642c6a998fd9
Support for while statements and fixed scope for if
Anders Halager <halager@gmail.com>
parents:
5
diff
changeset
|
157 foreach (stmt; s.stmts) |
|
5
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
158 visitStmt(stmt); |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
159 static if (is(StmtT == void)) |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
160 return; |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
161 else |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
162 return StmtT.init; |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
163 } |
|
2c5a8f4c254a
Added very simple if support.
Anders Halager <halager@gmail.com>
parents:
1
diff
changeset
|
164 |
| 1 | 165 StmtT visitExpStmt(ExpStmt s) |
| 166 { | |
| 167 visitExp(s.exp); | |
| 168 static if (is(StmtT == void)) | |
| 169 return; | |
| 170 else | |
| 171 return StmtT.init; | |
| 172 } | |
| 173 | |
| 174 // Expressions: | |
| 175 ExpT visitAssignExp(AssignExp exp) | |
| 176 { | |
| 177 visitExp(exp.identifier); | |
| 178 visitExp(exp.exp); | |
| 179 static if (is(ExpT == void)) | |
| 180 return; | |
| 181 else | |
| 182 return ExpT.init; | |
| 183 } | |
| 184 | |
| 185 ExpT visitBinaryExp(BinaryExp exp) | |
| 186 { | |
| 187 visitExp(exp.left); | |
| 188 visitExp(exp.right); | |
| 189 static if (is(ExpT == void)) | |
| 190 return; | |
| 191 else | |
| 192 return ExpT.init; | |
| 193 } | |
| 194 | |
| 195 ExpT visitCallExp(CallExp exp) | |
| 196 { | |
| 197 visitExp(exp.exp); | |
| 198 foreach (arg; exp.args) | |
| 199 visitExp(arg); | |
| 200 static if (is(ExpT == void)) | |
| 201 return; | |
| 202 else | |
| 203 return ExpT.init; | |
| 204 } | |
| 205 | |
| 206 ExpT visitNegateExp(NegateExp exp) | |
| 207 { | |
| 208 visitExp(exp.exp); | |
| 209 static if (is(ExpT == void)) | |
| 210 return; | |
| 211 else | |
| 212 return ExpT.init; | |
| 213 } | |
| 214 | |
| 215 ExpT visitIntegerLit(IntegerLit exp) | |
| 216 { | |
| 217 static if (is(ExpT == void)) | |
| 218 return; | |
| 219 else | |
| 220 return ExpT.init; | |
| 221 } | |
| 222 | |
| 223 ExpT visitIdentifier(Identifier exp) | |
| 224 { | |
| 225 static if (is(ExpT == void)) | |
| 226 return; | |
| 227 else | |
| 228 return ExpT.init; | |
| 229 } | |
| 230 } | |
| 231 |