Alias for std::true_type if T satisfies CharSet.

Synopsis

template<class T>
using is_charset = /* implementation-defined */;

Description

This metafunction determines if the type T meets these requirements of CharSet:

• An instance of T is invocable with this equivalent function signature:

bool T::operator()( char ) const noexcept;

Example

Use with enable_if on the return value:

template< class CharSet >
typename std::enable_if< is_charset<T>::value >::type
func( CharSet const& cs );

Template Parameters