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* [gcc r11-8895] libstdc++: Add default template argument to basic_istream_view
@ 2021-08-23 16:05 Jonathan Wakely
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From: Jonathan Wakely @ 2021-08-23 16:05 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:f918470940d9737396f3a087de4fbb4e70e874a6
commit r11-8895-gf918470940d9737396f3a087de4fbb4e70e874a6
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Mon Aug 23 16:16:05 2021 +0100
libstdc++: Add default template argument to basic_istream_view
The standard shows this default template argument in the <ranges>
synopsis, but it was missing in libstdc++.
libstdc++-v3/ChangeLog:
* include/std/ranges (basic_istream_view): Add default template
argument.
* testsuite/std/ranges/istream_view.cc: Check it.
(cherry picked from commit 1a129376bbc26d3c30af3c1ae6036e2e1446db40)
Diff:
---
libstdc++-v3/include/std/ranges | 3 ++-
libstdc++-v3/testsuite/std/ranges/istream_view.cc | 10 ++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index 9d1c4e1356a..3ef352949df 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -632,7 +632,8 @@ namespace views
= requires(basic_istream<_CharT, _Traits>& is, _Val& t) { is >> t; };
} // namespace __detail
- template<movable _Val, typename _CharT, typename _Traits>
+ template<movable _Val, typename _CharT,
+ typename _Traits = char_traits<_CharT>>
requires default_initializable<_Val>
&& __detail::__stream_extractable<_Val, _CharT, _Traits>
class basic_istream_view
diff --git a/libstdc++-v3/testsuite/std/ranges/istream_view.cc b/libstdc++-v3/testsuite/std/ranges/istream_view.cc
index 369790e89e5..af76a1ab39e 100644
--- a/libstdc++-v3/testsuite/std/ranges/istream_view.cc
+++ b/libstdc++-v3/testsuite/std/ranges/istream_view.cc
@@ -83,6 +83,15 @@ test04()
static_assert(!std::forward_iterator<It>);
}
+void
+test06()
+{
+ // Default template argument
+ using V = std::ranges::basic_istream_view<int, char>;
+ using W = std::ranges::basic_istream_view<int, char, std::char_traits<char>>;
+ static_assert( std::is_same_v<V, W> );
+}
+
int
main()
{
@@ -90,4 +99,5 @@ main()
test02();
test03();
test04();
+ test06();
}
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