boost::urls::grammar::is_charset

Alias for `std::true_type` if T satisfies CharSet .

Synopsis

Declared in <include/boost/url/grammar/charset.hpp>

template<class T>
using is_charset =     _see‐below_;

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;

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

Name Description

T

the type to check&period;

Created with MrDocs