On Tue, Feb 13, 2024 at 12:19 PM Robert Sitton via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
I have included a proposal that draws both our group's discussions and my own research into different languages. Please review this draft and let us know what you think.

Robert
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std::ranges::contains already exists: https://en.cppreference.com/w/cpp/algorithm/ranges/contains.

Barry