Enhanced tree interpreter

- Added "proper" C++ like variable scoping
- Added operator <
- Added ++ and --

1 files changed, 17 insertions, 7 deletions

diff --git a/JSImpl/src/ASTInterpreter.h b/JSImpl/src/ASTInterpreter.h
index 1ffecde..4d5b46f 100644
--- a/JSImpl/src/ASTInterpreter.h
+++ b/JSImpl/src/ASTInterpreter.h
@@ -11,10 +11,10 @@ public:
 	ASTInterpreter();
 	~ASTInterpreter();
 
-        typedef double value_type;
-        typedef std::stack<value_type> ValueStack;
+    typedef double value_type;
+    typedef IPLStack<value_type> ValueStack;
 
-        ValueStack Run(Expression* program);
+    ValueStack Run(Expression* program);
 
 	virtual void Visit(LiteralNull* e) override;
 	virtual void Visit(LiteralUndefined* e) override;
@@ -36,9 +36,19 @@ public:
 	virtual void Visit(FunctionDeclaration* e) override;
 	virtual void Visit(TopStatements* e) override;
 	virtual void Visit(EmptyExpression* e) override;
+
+	value_type& ModifyVariable(const IPLString& name);
 private:
-        void RunExpression(const ExpressionPtr& e);
-        bool EvalToBool(const ExpressionPtr& e);
-        ValueStack m_Evaluation;
-        std::unordered_map<std::string, ValueStack> m_Variables;
+    void RunExpression(const ExpressionPtr& e);
+    bool EvalToBool(const ExpressionPtr& e);
+
+	void EnterScope();
+	void LeaveScope();
+	friend struct VariableScope;
+
+    ValueStack m_Evaluation;
+	IPLUnorderedMap<IPLString, ValueStack> m_Variables;
+
+	typedef IPLVector<IPLString> Scope;
+	IPLStack<Scope> m_Scopes;
 };