Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.
PrevUpHomeNext

is_async_stream

Determine if T meets the requirements of AsyncStream.

Synopsis

Defined in header <boost/beast/core/stream_traits.hpp>

template<
    class T>
using is_async_stream = see-below;
Description

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.

Example

Use with static_assert:

template<class AsyncStream>
void f(AsyncStream& stream)
{
    static_assert(is_async_stream<AsyncStream>::value,
        "AsyncStream type requirements not met");
...

Use with std::enable_if (SFINAE):

template<class AsyncStream>
typename std::enable_if<is_async_stream<AsyncStream>::value>::type
f(AsyncStream& stream);

PrevUpHomeNext