https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57248
--- Comment #8 from Sumant Tambe <sutambe at yahoo dot com> --- Bummer! My assumption/expectation (probably due to my ignorance) is that any transformation/result obtained using a constexpr function should be usable (perhaps recursively) in the caller constexpr function. How does the recursive strmatch function work then?