Exemplo n.º 1
0
        object Stmt.Visitor <object> .VisitVarStmt(Stmt.Var stmt)
        {
            Object value = null;

            if (stmt.initializer != null)
            {
                value = Evaluate(stmt.initializer);
            }

            environment.Define(stmt.name._lexeme, value);
            return(null);
        }
        public object Call(Interpreter interpreter, List <object> args)
        {
            Environment.Environment environment = new Environment.Environment().SetParentEnvironment(closure);

            for (int i = 0; i < Declaration.Parameters.Count; ++i)
            {
                environment.Define(Declaration.Parameters[i].Lexeme, args[i]);
            }

            try
            {
                interpreter.ExecuteBlock(Declaration.Body, environment);
            }
            catch (ReturnException e)
            {
                return(e.Value);
            }

            return(null);
        }