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Move __lazy_* metafunctions to type traits and add tests

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@246408 91177308-0d34-0410-b5e6-96231b3b80d8
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Eric Fiselier
2015-08-31 03:50:31 +00:00
parent 408369b7c9
commit cae4caba73
4 changed files with 200 additions and 26 deletions
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25
include/__tuple
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@@ -136,31 +136,6 @@ get(array<_Tp, _Size>&&) _NOEXCEPT;
#if !defined(_LIBCPP_HAS_NO_VARIADICS)
// __lazy_and
template <bool _Last, class ..._Preds>
struct __lazy_and_impl;
template <class ..._Preds>
struct __lazy_and_impl<false, _Preds...> : false_type {};
template <>
struct __lazy_and_impl<true> : true_type {};
template <class _Pred>
struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {};
template <class _Hp, class ..._Tp>
struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {};
template <class _P1, class ..._Pr>
struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {};
// __lazy_not
template <class _Pred>
struct __lazy_not : integral_constant<bool, !_Pred::type::value> {};
// __make_tuple_indices
template <size_t...> struct __tuple_indices {};