CHAR_UNDERSCORE   169 ext/pcre/pcrelib/pcre_compile.c      CHAR_CIRCUMFLEX_ACCENT,  CHAR_UNDERSCORE,
CHAR_UNDERSCORE  3021 ext/pcre/pcrelib/pcre_compile.c           c == CHAR_UNDERSCORE) == negated;
CHAR_UNDERSCORE  2592 ext/pcre/pcrelib/pcre_exec.c              c == CHAR_UNDERSCORE) == (op == OP_NOTPROP))
CHAR_UNDERSCORE  4201 ext/pcre/pcrelib/pcre_exec.c             if ((category == ucp_L || category == ucp_N || c == CHAR_UNDERSCORE)
CHAR_UNDERSCORE  4949 ext/pcre/pcrelib/pcre_exec.c                  c == CHAR_UNDERSCORE)
CHAR_UNDERSCORE  5443 ext/pcre/pcrelib/pcre_exec.c                  c == CHAR_UNDERSCORE) == prop_fail_result)
CHAR_UNDERSCORE   178 ext/pcre/pcrelib/pcre_xclass.c            PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE)