public object Call(Interpreter interpreter, List <object> arguments)
{
LoxEnvironment environment = new LoxEnvironment(closure);
for (int i = 0; i < declaration.Params.Count; i++)
{
environment.Define(declaration.Params[i].Lexeme, arguments[i]);
}
try
{
interpreter.ExecuteBlock(declaration.Body, environment);
}
catch (ReturnException returnValue)
{
if (isInitializer)
{
return(closure.GetAt(0, "this"));
}
return(returnValue.Value);
}
if (isInitializer)
{
return(closure.GetAt(0, "this"));
}
return(null);
}
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));
}
