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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r11-9899] libstdc++: Avoid -Wzero-as-null-pointer-constant warning [PR103848] Date: Thu, 21 Apr 2022 12:32:22 +0000 (GMT) [thread overview] Message-ID: <20220421123222.534663888C4D@sourceware.org> (raw) https://gcc.gnu.org/g:b59435ff6069583290c8e0953a58044f598a348c commit r11-9899-gb59435ff6069583290c8e0953a58044f598a348c Author: Jonathan Wakely <jwakely@redhat.com> Date: Tue Jan 4 21:57:16 2022 +0000 libstdc++: Avoid -Wzero-as-null-pointer-constant warning [PR103848] libstdc++-v3/ChangeLog: PR libstdc++/103848 * include/bits/stl_deque.h (operator-): Do not use 0 as null pointer constant. (cherry picked from commit 76a45931ab7c831e32cebf13a6317e5e142f8151) Diff: --- libstdc++-v3/include/bits/stl_deque.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/libstdc++-v3/include/bits/stl_deque.h b/libstdc++-v3/include/bits/stl_deque.h index 20c73b4fc3c..8236fe35ce7 100644 --- a/libstdc++-v3/include/bits/stl_deque.h +++ b/libstdc++-v3/include/bits/stl_deque.h @@ -353,7 +353,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER operator-(const _Self& __x, const _Self& __y) _GLIBCXX_NOEXCEPT { return difference_type(_S_buffer_size()) - * (__x._M_node - __y._M_node - int(__x._M_node != 0)) + * (__x._M_node - __y._M_node - bool(__x._M_node)) + (__x._M_cur - __x._M_first) + (__y._M_last - __y._M_cur); } @@ -365,10 +365,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER template<typename _RefR, typename _PtrR> friend difference_type operator-(const _Self& __x, - const _Deque_iterator<_Tp, _RefR, _PtrR>& __y) _GLIBCXX_NOEXCEPT + const _Deque_iterator<_Tp, _RefR, _PtrR>& __y) + _GLIBCXX_NOEXCEPT { return difference_type(_S_buffer_size()) - * (__x._M_node - __y._M_node - int(__x._M_node != 0)) + * (__x._M_node - __y._M_node - bool(__x._M_node)) + (__x._M_cur - __x._M_first) + (__y._M_last - __y._M_cur); }
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