public object Call(Interpreter interpreter, List <object> arguments)
{
Environment environment = new Environment(_closure);
for (int i = 0; i < _declaration.Parameter.Count; i++)
{
environment.Define(_declaration.Parameter[i].Lexeme, arguments[i]);
}
try
{
interpreter.ExecuteBlock(_declaration.Body, environment);
}
catch (Return returnValue)
{
if (_isInitializer)
{
return(_closure.GetAt(0, "this"));
}
return(returnValue.Value);
}
if (_isInitializer)
{
return(_closure.GetAt(0, "this"));
}
return(null);
}
private object LookUpVariable(Token name, Expr expr)
{
if (_locals.TryGetValue(expr, out int distance))
{
return(_environment.GetAt(distance, name.Lexeme));
}
else
{
return(Globals.Get(name));
}
}