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* [gcc r13-2569] libstdc++: Fix return type of empty zip_/adjacent_transform [PR106803]
@ 2022-09-09 19:05 Patrick Palka
0 siblings, 0 replies; only message in thread
From: Patrick Palka @ 2022-09-09 19:05 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:8298427f6b546cabb853edd45c009cd1967b9d38
commit r13-2569-g8298427f6b546cabb853edd45c009cd1967b9d38
Author: Patrick Palka <ppalka@redhat.com>
Date: Fri Sep 9 14:59:14 2022 -0400
libstdc++: Fix return type of empty zip_/adjacent_transform [PR106803]
PR libstdc++/106803
libstdc++-v3/ChangeLog:
* include/std/ranges (views::_ZipTransform::operator()): Correct
return type in the empty case.
(views::_AdjacentTransform::operator()): Likewise.
Diff:
---
libstdc++-v3/include/std/ranges | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index 37ad80ad3de..20eb4e82ac8 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -5071,7 +5071,7 @@ namespace views::__adaptor
operator() [[nodiscard]] (_Fp&& __f, _Ts&&... __ts) const
{
if constexpr (sizeof...(_Ts) == 0)
- return views::empty<decay_t<invoke_result_t<_Fp>>>;
+ return views::empty<decay_t<invoke_result_t<decay_t<_Fp>&>>>;
else
return zip_transform_view(std::forward<_Fp>(__f), std::forward<_Ts>(__ts)...);
}
@@ -5762,7 +5762,7 @@ namespace views::__adaptor
operator() [[nodiscard]] (_Range&& __r, _Fp&& __f) const
{
if constexpr (_Nm == 0)
- return views::empty<tuple<>>;
+ return zip_transform(std::forward<_Fp>(__f));
else
return adjacent_transform_view<all_t<_Range>, decay_t<_Fp>, _Nm>
(std::forward<_Range>(__r), std::forward<_Fp>(__f));
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