From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 15 Sep 2021 20:49:29 +0000 (+0100)
Subject: libstdc++: Add missing constraint to std::span deduction guide [PR102280]
X-Git-Tag: releases/gcc-11.3.0~791
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95d404d85c53e4ab821ac28cbbbedf0d68cac8da;p=thirdparty%2Fgcc.git

libstdc++: Add missing constraint to std::span deduction guide [PR102280]

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	PR libstdc++/102280
	* include/std/span (span(Range&&)): Add constraint to deduction
	guide.

(cherry picked from commit e67917f5df9d84f5aed3513b3931a82870d25135)
---

diff --git a/libstdc++-v3/include/std/span b/libstdc++-v3/include/std/span
index b44e3b9e9c79..86fe042e7245 100644
--- a/libstdc++-v3/include/std/span
+++ b/libstdc++-v3/include/std/span
@@ -407,7 +407,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     span(_Iter, _End)
       -> span<remove_reference_t<iter_reference_t<_Iter>>>;
 
-  template<typename _Range>
+  template<ranges::contiguous_range _Range>
     span(_Range &&)
       -> span<remove_reference_t<ranges::range_reference_t<_Range&>>>;