The documentation for the \0 escape doesn't match the implementation

[tlemo]

The documentation says that \0 matches the NUL character, but at least when using the default matcher, \0 seems to be treated as the prefix for an octal encoding of a character

[genivia-inc]

Thank you for your feedback! Will be fixed.

[genivia-inc]

The problem is actually in the regex converter, which takes the "signature" of a regex engine to make sure it complies and also converts non-supported regex syntax to syntax the the regex engine supports.

Line 53 in include/reflex/matcher.h should be updated to add a 0 after the W to natively support \0 escapes:

static std::string convert(T regex, convert_flag_type flags = convert_flag::none, bool *multiline = NULL)
{
  return reflex::convert(regex, "imsx#=^:abcdefhijklnrstuvwxzABDHLNQSUW0<>?", flags, multiline);
}

[genivia-inc]

I've committed a minor update that will be included in the next official release 5.1.