bsl::enable_if< B, T > Class Template Reference

Defines a conditional "if" statement for SFINAE overload resolution. If B is true, bsl::enable_if has a public member typedef of type T, otherwise, there is no public member typedef. More...

#include <enable_if.hpp>

Detailed Description

template<bool B, typename T = void>
class bsl::enable_if< B, T >

Defines a conditional "if" statement for SFINAE overload resolution. If B is true, bsl::enable_if has a public member typedef of type T, otherwise, there is no public member typedef.

#include <bsl/enable_if.hpp>
#include <bsl/debug.hpp>

namespace bsl
{
    template<          // --
        typename T,    // --
        bsl::enable_if_t<bsl::is_same<T, bool>::value, bool> = true>
    constexpr bool
    foo() noexcept
    {
        return true;
    }

    template<          // --
        typename T,    // --
        bsl::enable_if_t<!bsl::is_same<T, bool>::value, bool> = true>
    constexpr bool
    foo() noexcept
    {
        return false;
    }

    inline void
    example_enable_if_overview() noexcept
    {
        if (foo<bool>()) {
            bsl::print() << "success\n";
        }

        if (!foo<void>()) {
            bsl::print() << "success\n";
        }
    }
}

Template Parameters

B	if B is true, bsl::enable_if has a public member typedef of type T, otherwise, there is no public member typedef.
T	the type of typedef that is defined if B is true

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The documentation for this class was generated from the following file:

• include/bsl/enable_if.hpp