Defined in header
template< class T >
concept bool TagSpecifier = /* implementation-defined */;
TagSpecifier<T> is satisfied if and only if
T is a tag specifier for use with ranges::tagged.
The Ranges TS provides a set of tag specifiers in <experimental/ranges/algorithm>. Users cannot define their own tag specifiers.
| augument a tuple-like type with named accessors |
| tag specifiers for use with ranges::tagged |