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From: Jonathan Wakely <redi@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org
Subject: [gcc r10-10184] libstdc++: Add missing constraint to std::span
 deduction guide [PR102280]
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https://gcc.gnu.org/g:1a27df25a71bb0d6a5dfb0162d1867d308f8f33f

commit r10-10184-g1a27df25a71bb0d6a5dfb0162d1867d308f8f33f
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Sep 15 21:49:29 2021 +0100

    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:
---
 libstdc++-v3/include/std/span | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/std/span b/libstdc++-v3/include/std/span
index 9c9a4073507..4173446d141 100644
--- a/libstdc++-v3/include/std/span
+++ b/libstdc++-v3/include/std/span
@@ -412,7 +412,7 @@ _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&>>>;