NAME¶

std::experimental::nonesuch - std::experimental::nonesuch

Synopsis¶

Defined in header <experimental/type_traits>
struct nonesuch {

~nonesuch() = delete;
nonesuch(nonesuch const&) = delete; (library fundamentals TS v2)
void operator=(nonesuch const&) = delete;

};

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

nonesuch has no default constructor or initializer-list constructor, and is not an
aggregate.

Notes¶

nonesuch cannot be constructed, destroyed, or copied.

Defect reports

The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2960 LFTSv2 nonesuch may be an aggregate and has an made non-aggregate and
implicit conversion sequence from {} removed ICS