std::experimental::nonesuch

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals 2 TS)

Extensions for parallelism (parallelism TS)

Concepts (concepts TS)

Extensions for concurrency (concurrency TS)

 

Library fundamentals v2

experimental::propagate_const

experimental::not_fn

experimental::observer_ptr

experimental::make_array

experimental::ostream_joiner

experimental::gcd

experimental::lcm

experimental::source_location

detection idiom

uniform container erasure

 

Defined in header <experimental/type_traits>
struct nonesuch {     nonesuch() = delete;     ~nonesuch() = delete;     nonesuch(nonesuch const&) = delete;     void operator=(nonesuch const&) = delete; };		(library fundamentals TS v2)

std::experimental::nonesuch is a class type used by std::experimental::detected_t to indicate detection failure.

Notes

nonesuch is not constructible, destructible, or copyable.