What are the best practices for using enable_if in C++?

What are the best practices for using enable_if in C++?

Using enable_if can help you create more flexible and type-safe templates. It's best used for SFINAE (Substitution Failure Is Not An Error) to conditionally enable or disable templates based on type traits.

Can you give me an example of how to use enable_if?

Sure! Here's a simple example:

#include <type_traits>

template <typename T, typename = typename std::enable_if<std::is_integral<T>::value>::type>
void process(T value) {
    // Function implementation for integral types
}

What are some common mistakes to avoid when using enable_if?

Common mistakes include overusing enable_if, which can lead to complex and hard-to-read code, and not considering the implications of SFINAE on template specialization.

Are there alternatives to enable_if?

Yes, alternatives include using std::conditional, concepts (in C++20), or simply using static_assert for compile-time checks.