std::experimental:: nonesuch
|
Defined in header
<experimental/type_traits>
|
||
|
struct
nonesuch
{
~nonesuch
(
)
=
delete
;
|
(library fundamentals TS v2) | |
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 implicit conversion sequence from
{}
|
made non-aggregate and removed ICS |