public LoxFunction Bind(LoxInstance instance)
{
Environment environment = new Environment(_closure);
environment.Define("this", instance);
return(new LoxFunction(_declaration, environment, _isInitializer));
}
public object Call(Interpreter interpreter, List <object> arguments)
{
LoxInstance instance = new LoxInstance(this);
LoxFunction initializer = FindMethod("init");
initializer?.Bind(instance).Call(interpreter, arguments);
return(instance);
}
public LoxFunction Bind(LoxInstance instance)
{
var scope = new Scope(_closure);
scope.Define("this", instance);
return(new LoxFunction(_declaration, scope, _isInitializer));
}
public LoxFunction FindMethod(LoxInstance instance, string name)
{
if (_methods.TryGetValue(name, out LoxFunction method))
{
return(method.Bind(instance));
}
return(_superClass?.FindMethod(instance, name));
}
public object Call(Interpreter interpreter, List <object> args)
{
var instance = new LoxInstance(this);
if (_methods.TryGetValue("init", out LoxFunction initializer))
{
initializer.Bind(instance).Call(interpreter, args);
}
return(instance);
}
public Object Call(Interpreter interpreter, List <Object> arguments)
{
LoxInstance instance = new LoxInstance(this);
LoxFunction initializer = FindMethod("init");
if (initializer != null)
{
initializer.Bind(instance).Call(interpreter, arguments);
}
return(instance);
}
public object VisitSuperExpr(Expr.Super expr)
{
int? distance = _locals[expr];
LoxClass superclass = (LoxClass)_environment.GetAt((int)distance, "super");
LoxInstance @object = (LoxInstance)_environment.GetAt((int)distance - 1, "this");
LoxFunction method = superclass.FindMethod(expr.Method.Lexeme);
if (method == null)
{
throw new RuntimeError(expr.Method, $"Undefined method '{expr.Method.Lexeme}'.");
}
return(method.Bind(@object));
}
public object VisitSuperExpr(Super expr)
{
int distance = locals[expr];
LoxClass superclass = (LoxClass)environment.GetAt(distance, "super");
// "this" is always one level nearer than "super"'s environment.
LoxInstance @object = (LoxInstance)environment.GetAt(distance - 1, "this");
LoxFunction method = superclass.FindMethod(expr.Method.Lexeme);
if (method == null)
{
throw new RuntimeException(expr.Method, $"Undefined property '{expr.Method.Lexeme}'.");
}
return(method.Bind(@object));
}
public Object Visit_SuperExpr(SuperExpr expr)
{
int distance = _locals[expr];
LoxClass superclass = (LoxClass)_environment.GetAt(distance, "super");
// "this" is always one level nearer than "super"'s environment.
LoxInstance obj = (LoxInstance)_environment.GetAt(distance - 1, "this");
string name = (string)expr.method.value;
LoxFunction method = superclass.FindMethod(name);
if (method == null)
{
throw new RuntimeException(expr.method.line, expr.method.column, "Undefined property '" + name + "'.");
}
return(method.Bind(obj));
}
