[gcc r15-8451] libstdc++: Activate a __cpp_lib_ranges_to_container dependent test

[Francois Dumont]

https://gcc.gnu.org/g:e3b3290f7330a81176d3d5d7c77623cd6c4bc70c

commit r15-8451-ge3b3290f7330a81176d3d5d7c77623cd6c4bc70c
Author: François Dumont <frs.dumont@gmail.com>
Date:   Wed Mar 19 19:10:48 2025 +0100

    libstdc++: Activate a __cpp_lib_ranges_to_container dependent test
    
    Now that std::set has support for __cpp_lib_ranges_to_container we can
    activate a test using it in a fancy allocator pointer context.
    
    libstdc++-v3/ChangeLog
    
            * testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc:
            Activate the template member tests involving __cpp_lib_ranges_to_container
            support.
    
    Reviewed-by: Jonathan Wakely <jwakely@redhat.com>

Diff:
---
 .../set/requirements/explicit_instantiation/alloc_ptr.cc              | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/libstdc++-v3/testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc b/libstdc++-v3/testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc
index 4fa84a74882d..575d59014969 100644
--- a/libstdc++-v3/testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc
+++ b/libstdc++-v3/testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc
@@ -76,14 +76,12 @@ test_template_members(__gnu_test::input_container<short>& c)
   s.merge(m1);
 #endif
 
-#if 0
 #ifdef __cpp_lib_ranges_to_container
   short arr[2];
   __gnu_test::test_input_range<short> r(arr);
   std::set<int, std::less<int>, Allocator<int>> s2(std::from_range, r);
   std::set<int, std::less<int>, Allocator<int>> s3(std::from_range, r,
 						   Allocator<int>{});
-  s2.insert_range(s2.begin(), r);
-#endif
+  s2.insert_range(r);
 #endif
 }