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Drop qt_is_permutation

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It was a workaround until we could depend on C++14's
std::is_permutation overload with 4 args. We now can, and the code
using it is gone anyhow, so drop it.

Change-Id: Ib9af71eeb767c83b1150c482441503288f1987d4
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Giuseppe D'Angelo 2020-10-11 20:45:30 +02:00
parent 456ba431e6
commit 772a10391e
1 changed files with 0 additions and 23 deletions
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23
src/corelib/global/qglobal.h
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@ -1026,29 +1026,6 @@ QT_WARNING_DISABLE_MSVC(4530) /* C++ exception handler used, but unwind semantic
# endif
#endif
// Work around MSVC warning about use of 3-arg algorithms
// until we can depend on the C++14 4-arg ones.
//
// These algortithms do NOT check for equal length.
// They need to be treated as if they called the 3-arg version (which they do)!
#ifdef Q_CC_MSVC
# define QT_3ARG_ALG(alg, f1, l1, f2, l2) \
std::alg(f1, l1, f2, l2)
#else
# define QT_3ARG_ALG(alg, f1, l1, f2, l2) \
[&f1, &l1, &f2, &l2]() { \
Q_UNUSED(l2); \
return std::alg(f1, l1, f2); \
}()
#endif
template <typename ForwardIterator1, typename ForwardIterator2>
inline bool qt_is_permutation(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2)
{
return QT_3ARG_ALG(is_permutation, first1, last1, first2, last2);
}
#undef QT_3ARG_ALG
// this adds const to non-const objects (like std::as_const)
template <typename T>
constexpr typename std::add_const<T>::type &qAsConst(T &t) noexcept { return t; }