public LoxFunction Bind(LoxInstance instance)
{
Environment closureWithThis = new Environment(enclosing: closure);
closureWithThis.Define(instance);
return(new LoxFunction(function, closure: closureWithThis, isInitializer));
}
public object Call(Interpreter interpreter, List <object> args)
{
LoxInstance instance = new LoxInstance(this);
if (initializer != null)
{
initializer.Bind(instance).Call(interpreter, args);
}
return(instance);
}
public object visitSuperExpr(Expr.Super expr)
{
var exprLocationData = locals[expr];
LoxClass superclass = (LoxClass)environment.GetAt(exprLocationData.depth, exprLocationData.index);
// We know "this" is one environment removed from "super" because of the way we set the environments up
// in visitClassStmt. Hacky fix but it works. We also know its index is 0 because "this" is the only variable
// in its environment.
LoxInstance instance = (LoxInstance)environment.GetAt(exprLocationData.depth - 1, 0);
LoxFunction method = superclass.FindMethod(expr.method.lexeme);
if (method == null)
{
throw new RuntimeError(expr.method, "Undefined superclass property '" + expr.method.lexeme + "'.");
}
return(method.Bind(instance));
}