...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Determine if T
meets the
requirements of SyncStream.
Defined in header <boost/beast/core/stream_traits.hpp>
template< class T> using is_sync_stream = see-below;
Metafunctions are used to perform compile time checking of template types.
This type will be std::true_type
if T
meets the requirements, else the type will be std::false_type
.
Use with static_assert
:
template < class SyncStream> void f(SyncStream& stream) { static_assert (is_sync_stream<SyncStream>::value, "SyncStream type requirements not met" ); ...
Use with std::enable_if
(SFINAE):
template < class SyncStream> typename std::enable_if<is_sync_stream<SyncStream>::value>::type f(SyncStream& stream);