Jonathan Wakely
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8df27fcb91
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P0758R1 Implicit conversion traits
Extend __is_convertible_helper to also detect whether the conversion is
non-throwing, for std::is_nothrow_convertible in C++2a,
* include/std/type_traits [__cplusplus > 201703]
(__is_convertible_helper::__is_nothrow_type): Define new member.
(__is_convertible_helper<_From, _To, false>::__test_aux1): Add
noexcept.
(__is_convertible_helper<_From, _To, false>::__test_nothrow)
(__is_convertible_helper<_From, _To, false>::__is_nothrow_type): Add
new members.
(is_nothrow_convertible, is_nothrow_convertible_v): Define for C++2a.
* testsuite/20_util/is_nothrow_convertible/value.cc: New.
* testsuite/20_util/is_nothrow_convertible/requirements/
explicit_instantiation.cc: New.
* testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc:
New.
From-SVN: r262322
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2018-07-02 23:09:25 +01:00 |