dsanders added inline comments. ================ Comment at: include/regex:980 @@ +979,3 @@ +#if defined(__GLIBC__) + static const char_class_type __regex_word = static_cast<char_class_type>(_ISbit(15)); +#else ---------------- The static_cast is necessary to silence a false-positive warning on little-endian. _ISbit(15) expands to: ((15) < 8 ? ((1 << (15)) << 8) : ((1 << (15)) >> 8)) which simplifies to: 0 ? 0x800000 : 0x80 Clang warns about the truncation of the 0x800000 to char_class_type (unsigned short) even though this value doesn't matter.
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