Alias for std::true_type if T satisfies CharSet.
Synopsis
Declared in <boost/url/grammar/charset.hpp>
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
Name |
Description |
T |
the type to check. |
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