std::experimental::ranges:: TagSpecifier

From cppreference.com

Defined in header `<experimental/ranges/utility>`
template < class T > concept bool TagSpecifier = /* implementation-defined */ ;		(ranges TS)

The concept 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.

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Execution support library (C++26)
Technical specifications
Symbols index
External libraries

Technical Specification
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
Experimental Non-TS
Pattern Matching
Linear Algebra
std::execution
Contracts
2D Graphics

tagged	augument a tuple-like type with named accessors (class template)
in in1 in2 out out1 out2 fun min max begin end	tag specifiers for use with ranges::tagged (class)