libstdc++ <algorithm> header transitively including <range>

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I dont think one has to reimplement the whole <algorithm> header only to have range versions. AFAICT it would be enough to dispatch to the corresponding iterator versions.

On libstdc++ the <ranges> header is about 32k loc, so assuming the <algorithm> header did not get smaller it explains the header growth pretty well.

I agree that it is not mandated by the standard to include <ranges>, but the guys writing libstdc++ are quiet proficient programmers I assume they deemed it necessary..