[libcxx-commits] [libcxx] [libc++][NFC] Centralize test for support of == and != in ranges (PR #78481)

[Louis Dionne via libcxx-commits]

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@@ -10,9 +10,11 @@
 #define LIBCXX_TEST_SUPPORT_TEST_RANGE_H
 
 #include <concepts>
+#include <functional>
 #include <iterator>
 #include <ranges>
 
+#include "__concepts/invocable.h"
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ldionne wrote:

We can't include private libc++ headers in the test suite since the test suite must work with other implementations too. Also I think this header is not necessary anyway.

https://github.com/llvm/llvm-project/pull/78481