From ef389dadd4f082e13b076f14a123bf506e158da4 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 8 Apr 2020 16:51:59 +0100
Subject: libstdc++: Add comparison operators to types from Numerics clause
Some more C++20 changes from P1614R2, "The Mothership has Landed".
* include/bits/slice_array.h (operator==(const slice&, const slice&)):
Define for C++20.
* include/std/complex (operator==(const T&, const complex<T>&))
(operator!=(const complex<T>&, const complex<T>&))
(operator!=(const complex<T>&, const T&))
(operator!=(const T&, const complex<T>&)): Do not declare for C++20.
* testsuite/26_numerics/slice/compare.cc: New test.
---
libstdc++-v3/include/std/complex | 2 ++
1 file changed, 2 insertions(+)
(limited to 'libstdc++-v3/include/std/complex')
diff --git a/libstdc++-v3/include/std/complex b/libstdc++-v3/include/std/complex
index 4f170dc..f2917b8 100644
--- a/libstdc++-v3/include/std/complex
+++ b/libstdc++-v3/include/std/complex
@@ -468,6 +468,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
operator==(const complex<_Tp>& __x, const _Tp& __y)
{ return __x.real() == __y && __x.imag() == _Tp(); }
+#if !(__cpp_impl_three_way_comparison >= 201907L)
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR bool
operator==(const _Tp& __x, const complex<_Tp>& __y)
@@ -490,6 +491,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline _GLIBCXX_CONSTEXPR bool
operator!=(const _Tp& __x, const complex<_Tp>& __y)
{ return __x != __y.real() || _Tp() != __y.imag(); }
+#endif
//@}
/// Extraction operator for complex values.
--
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