* include/std/tuple
In the hunk below, should the sizes_match template parameter be privatized (since it isn't part of the public interface)? Or perhaps even removed if it's not used? Martin @ -457,6 +457,73 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION } }; + + // Concept utility functions + template <bool sizes_match, typename... _Elements> + struct _TC