REG_MATCH_NULL_STRING_P 3044 modules/up/src/Core/gnu/regex.c #define REG_MATCH_NULL_STRING_P(R)  ((R).bits.match_null_string_p)
REG_MATCH_NULL_STRING_P 3042 modules/up/src/gnug++/regex.c #define REG_MATCH_NULL_STRING_P(R)  ((R).bits.match_null_string_p)