public LoxFunction Bind(LoxInstance instance)
{
Environment environment = new Environment(closure);
environment.Define("this", instance);
return(new LoxFunction(declaration, environment, isInitializer));
}
internal LoxFunction FindMethod(LoxInstance instance, string name)
{
if (_methods.ContainsKey(name))
{
return(_methods[name].Bind(instance));
}
return(null);
}
public object Call(Interpreter interpreter, object[] arguments)
{
var instance = new LoxInstance(this);
FindMethod(instance, "init")
?.Call(interpreter, arguments);
return(instance);
}
public object Call(Interpreter interpreter, List <object> arguments)
{
var instance = new LoxInstance(this);
var initializer = _methods.ContainsKey("init") ? _methods["init"] : null;
initializer?.Bind(instance).Call(interpreter, arguments);
return(instance);
}
public override object Call(Interpreter interpreter, List <object> arguments)
{
LoxInstance instance = new LoxInstance(this);
LoxFunction initializer = methods["init"];
if (initializer != null)
{
initializer.Bind(instance).Call(interpreter, arguments);
}
return(instance);
}
public LoxFunction FindMethod(LoxInstance instance, string name)
{
if (methods.ContainsKey(name))
{
return(methods[name].Bind(instance));
}
if (superclass != null)
{
return(superclass.FindMethod(instance, name));
}
return(null);
}
object Expr.IVisitor <object> .VisitSuperExpr(Expr.Super expr)
{
int distance = locals[expr];
LoxClass superclass = (LoxClass)environment.GetAt(distance, "super");
LoxInstance obj = (LoxInstance)environment.GetAt(distance - 1, "this");
LoxFunction method = superclass.FindMethod(obj, expr.method.lexeme);
if (method == null)
{
throw new RuntimeError(expr.method, "Undefined property '" + expr.method.lexeme + "'.");
}
return(method);
}
public LoxFunction FindMethod(LoxInstance instance, string name)
{
return(methods.ContainsKey(name)
? methods[name].Bind(instance)
: superclass?.FindMethod(instance, name));
}