November 2024
Intermediate to advanced
430 pages
9h 7m
French
Content preview from Livre de cuisine du code propre
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Chapitre 23. Métaprogrammation
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Les logiciels sont comme l'entropie : Il est difficile à appréhender, ne pèse rien et obéit à la deuxième loi de la thermodynamique, c'est-à-dire qu'il augmente toujours.
Norman Augustine
23.0 Introduction
La métaprogrammation désigne la capacité d'un langage de programmation à permettre la manipulation, la génération et la modification du code au moment de l'exécution. C'est fascinant. Une fois que tu l'auras découverte, tu verras que c'est l'outil qui résout tous les problèmes. Mais ce n'est pas une solution miracle (voir la recette 4.1, " Créer de petits objets ") et ce n'est pas gratuit non plus. Penser que tu es en train de créer une sorte de magie est la principale raison pour laquelle tu ne devrais pas l'utiliser.
La métaprogrammation est comme les modèles de conception avec des états d'excitation similaires :
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Tu apprendras à le connaître.
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Tu ne le comprends pas complètement.
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Tu l'étudies minutieusement.
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Tu le maîtrises.
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Tu sembles en trouver presque partout.
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Tu en abuses (voir la recette 12.5, "Supprimer les abus des patrons de conception") en pensant qu'il s'agit de ta toute nouvelle solution miracle (voir la recette 4.1, "Créer de petits objets").
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Tu apprends à l'éviter.
23.1 Supprimer l'utilisation de la métaprogrammation
Problème
Tu utilises la métaprogrammation.
Solution
Change l'usage ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.