boost::urls::grammar::is_rule
Determine if T meets the requirements of Rule
Synopsis
Declared in <include/boost/url/grammar/type_traits.hpp>
template<class T>
using is_rule = _see‐below_;Description
This is an alias for `std::true_type` if `T` meets the requirements, otherwise it is an alias for `std::false_type`.
struct U
{
struct value_type;
auto
parse(
char const*& it,
char const* end) const ->
system::result<value_type>
};
static_assert( is_rule<U>::value, "Requirements not met" );