Writing metafunctions using simpler methods

Chapter 4, Compile-time Tricks, and Chapter 8, Metaprogramming, were devoted to metaprogramming. If you were trying to use techniques from those chapters, you may have noticed that writing a metafunction can take a lot of time. So, it may be a good idea to experiment with metafunctions using more user-friendly methods, such as C++11 constexpr, before writing a portable implementation.

In this recipe, we'll take a look at how to detect constexpr support.

Getting ready

The constexpr functions are functions that can be evaluated at compile-time. That is all we need to know for this recipe.

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