Mercurial > projects > dang
view sema/SymbolTable.d @ 53:da551f90e03f new_gen
Added struct decl and forward ref. A note on structs: they need to make a new scope when declared. Otherwise you could access struct members as globals
author | Anders Johnsen <skabet@gmail.com> |
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date | Sat, 26 Apr 2008 18:52:27 +0200 |
parents | 69464d465284 |
children | 4ae365eff712 |
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module sema.SymbolTable; import tango.io.Stdout; import lexer.Token, ast.Exp; import sema.DType; public import sema.Symbol; class Scope { this() {} this(Scope enclosing) { this.enclosing = enclosing; this.func = enclosing.func; } Scope enclosing; Symbol add(Identifier id) { auto s = new Symbol; s.id = id; symbols[id] = s; return s; } Symbol find(Identifier id) { if (auto sym = id in symbols) return *sym; if (enclosing !is null) return enclosing.find(id); return null; } DType findType(Identifier id) { if (auto type = id.get in types) return *type; if (enclosing !is null) return enclosing.findType(id); return null; } char[][] names() { char[][] res; if (enclosing) res = enclosing.names; foreach (id, sym; symbols) res ~= sym.id.name ~ " : " ~ sym.type.name; return res; } Symbol parentFunction() { if (func !is null) return func; else if (enclosing !is null) return enclosing.parentFunction(); else return null; } int opEquals(Object o) { return this is o; } char[] toString() { if (func) return Stdout.layout.convert("{}: {}", func.id.get, symbols.length); return Stdout.layout.convert("root: {}", symbols.length); } Symbol parentFunction(Symbol f) { func = f; return f; } DType[char[]] types; private: Symbol[Identifier] symbols; Symbol func; }