Azzera filtri
Azzera filtri

What's the best way to prevent a class from being instantiated?

2 visualizzazioni (ultimi 30 giorni)
I want this class to be completely static and can never be instantiated. It only contains a bunch of static methods and constants.

Risposta accettata

Steven Lord
Steven Lord il 23 Feb 2022
Make it Abstract.
classdef (Abstract) purelyStatic
methods(Static)
function y = getPi()
y = pi;
end
end
properties(Constant)
theAnswerToLifeTheUniverseAndEverything = 42;
end
end
Use it as:
P = purelyStatic.getPi()
A = purelyStatic.theAnswerToLifeTheUniverseAndEverything
Trying to instantiate it will error.
x = purelyStatic
  2 Commenti
埃博拉酱
埃博拉酱 il 24 Feb 2022
It's just abstract. It can be inherited and then instantiated.
Steven Lord
Steven Lord il 24 Feb 2022
Make it Sealed as well. That still wouldn't prevent someone from editing the class file but there isn't really a way to make it so it can never, ever, ever be modified. At least not while butterflies exist :)
classdef (Abstract, Sealed) purelyStatic

Accedi per commentare.

Più risposte (0)

Categorie

Scopri di più su Loops and Conditional Statements in Help Center e File Exchange

Prodotti


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by