public object visitSuperExpr(Expr.Super expr)
{
if (currentClass != ClassType.SUBCLASS)
{
Lox.ReportError(expr.keyword, "Can't use 'super' outside of a sub class.");
}
else
{
ResolveLocal(expr, expr.keyword.lexeme, AccessType.RHS);
}
return(null);
}
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));
}
public string visitSuperExpr(Expr.Super expr)
{
throw new NotImplementedException();
}