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http::is_fields

Determine if a type meets the Fields named requirements.

Synopsis

Defined in header <boost/beast/http/type_traits.hpp>

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

This alias template is std::true_type if T meets the requirements, otherwise it is std::false_type.

Template Parameters

Type

Description

T

The type to test.

Example

Use with static_assert:

template<bool isRequest, class Body, class Fields>
void f(message<isRequest, Body, Fields> const&)
{
    static_assert(is_fields<Fields>::value,
        "Fields type requirements not met");
...

Use with std::enable_if (SFINAE):

template<bool isRequest, class Body, class Fields>
typename std::enable_if<is_fields<Fields>::value>::type
f(message<isRequest, Body, Fields> const&);

Convenience header <boost/beast/http.hpp>


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