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(C++) std::enable_if

std::enable_if is a C++11 ...

std::enable_if is a convenient way to leverage SFINAE to conditionally remove functions from overload resolution based on type traits and to provide separate function overloads and specializations for different type traits. std::enable_if can be used as an additional function argument (not applicable to operator overloads), as a return type (not applicable to constructors and destructors), or as a class template or function template parameter' [2].

Examples

• std::enable_if example 1: basics

Advice

• Distinguish among std::enable_if, static_assert, and =delete [1]

External links

1. cppreference.com its page about std::enable_if

References

1. Scott Meyers. C++ And Beyond 2012 session: 'Initial thoughts on Effective C++11'. 2012. 'Distinguish among std::enable_if, static_assert, and =delete'
2. cppreference.com its page about std::enable_if: 'This metafunction is a convenient way to leverage SFINAE to conditionally remove functions from overload resolution based on type traits and to provide separate function overloads and specializations for different type traits. std::enable_if can be used as an additional function argument (not applicable to operator overloads), as a return type (not applicable to constructors and destructors), or as a class template or function template parameter.'

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