public object AssignVariable(Expr expr, object value)
{
if (locals.ContainsKey(expr))
{
return(environment.SetAt(locals[expr], ((Variable)expr).name, value));
}
else
{
return(globals.Set(((Variable)expr).name, value));
}
}
public object Set(Token name, object value)
{
if (!values.ContainsKey(name.lexeme))
{
if (enclosing == null)
{
throw new ErrorHandler.RuntimeError(name, "Undefined variable '" + name.lexeme + "'");
}
else
{
return(enclosing.Set(name, value));
}
}
if (values[name.lexeme].Item1)
{
throw new ErrorHandler.RuntimeError(name, "Can't assign to a constant");
}
return(values[name.lexeme] = new Tuple <bool, object>(false, value));
}
