C++20 concepts require parens around atomic constraints that are not primary-expressions.
Tested x86_64-pc-linux-gnu, applying to trunk. * include/std/memory (uses_allocator_construction_args): Add parens around constraint. --- libstdc++-v3/ChangeLog | 5 +++++ libstdc++-v3/include/std/memory | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 8e96a898483..a88e73836b2 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,8 @@ +2019-07-16 Jason Merrill <ja...@redhat.com> + + * include/std/memory (uses_allocator_construction_args): Add parens + around constraint. + 2019-07-12 Jonathan Wakely <jwak...@redhat.com> * testsuite/29_atomics/atomic_float/1.cc: Fix comment. diff --git a/libstdc++-v3/include/std/memory b/libstdc++-v3/include/std/memory index 3660f4d86de..3036802f8c3 100644 --- a/libstdc++-v3/include/std/memory +++ b/libstdc++-v3/include/std/memory @@ -261,7 +261,7 @@ get_pointer_safety() noexcept { return pointer_safety::relaxed; } uses_allocator_construction_args(const _Alloc& __a, _Args&&... __args) noexcept #if __cpp_concepts - requires ! _Std_pair<_Tp> + requires (! _Std_pair<_Tp>) #endif { return std::__uses_alloc_args<_Tp>(__a, std::forward<_Args>(__args)...); base-commit: 56e35b0b1490442b7c8f506febaf15d3a42f65e1 -- 2.21.0