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Michal Nazarewicz authored
RE_CHAR_TO_MULTIBYTE(c) yields c for ASCII characters and a byte8 character for c ≥ 0x80. Furthermore, CHAR_BYTE8_P(c) is true only for byte8 characters. This means that c = RE_CHAR_TO_MULTIBYTE (ch); if (! CHAR_BYTE8_P (c) && re_iswctype (c, cc)) is equivalent to: c = c; if (! false && re_iswctype (c, cc)) for 0 ⪬ c < 0x80, and c = BYTE8_TO_CHAR (c); if (! true && re_iswctype (c, cc)) for 0x80 ⪬ c < 0x100. In other words, the loop never executes for c ≥ 0x80 and RE_CHAR_TO_MULTIBYTE call is unnecessary for c < 0x80. * src/regex.c (regex_compile): Simplyfy a for loop by eliminating dead iterations and unnecessary macro calls.
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