Mercurial > projects > dang
view sema/Scope.d @ 92:771ac63898e2 new_gen
A few better parser errors plus renaming most of the sema classes to match that they do now. Some have changes a lot.
author | Anders Johnsen <skabet@gmail.com> |
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date | Mon, 05 May 2008 18:44:20 +0200 |
parents | sema/SymbolTable.d@06dda301ea61 |
children | 621cedba53ea |
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module sema.Scope; import tango.io.Stdout; import lexer.Token, ast.Decl, 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(!id) return null; 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 (parentFunction() !is null) res ~= "pf: " ~ parentFunction().identifier.get; if (enclosing) res = enclosing.names; foreach (id, sym; symbols) res ~= sym.id.name ~ " : " ~ (sym.type is null? "?" : sym.type.name); return res; } FuncDecl parentFunction() { if (func !is null) return func; else if (enclosing !is null) return enclosing.parentFunction(); else return null; } int stmtIndex() { if (currentStmtIndex != -1) return currentStmtIndex; else if (enclosing !is null) return enclosing.stmtIndex(); else return -1; } int opEquals(Object o) { return this is o; } char[] toString() { if (func) return Stdout.layout.convert("{}: {}", func.identifier.get, symbols.length); return Stdout.layout.convert("root: {}", symbols.length); } FuncDecl parentFunction(FuncDecl f) { func = f; return f; } DType[char[]] types; int currentStmtIndex = -1; private: Symbol[Identifier] symbols; FuncDecl func; }