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Re:Show HN: Compile-time HTML parsing in C++14 by otabdeveloper1 on Tuesday August 01, 2017 @05:59AM (#14899143)
That negates the whole point of templates and constexpr -- they're purely functional subsets and explicitly designed to be so.

(You can argue that purely functional code is useless in real life and that C++ shouldn't strive to be purely functional, but that's another argument.)

Re:Show HN: Compile-time HTML parsing in C++14 by gpderetta on Tuesday August 01, 2017 @07:54AM (#14899725)
C++11 constexpr where purely functional, C++14 adds (controlled) mutation.