regex("\\[", regex_constants::awk);
VERIFY(regex_match_debug("\"", regex("[\\\"]", regex_constants::awk)));
VERIFY(regex_match_debug("/", regex("/", regex_constants::awk)));
regex("\\[", regex_constants::awk);
VERIFY(regex_match_debug("\"", regex("[\\\"]", regex_constants::awk)));
VERIFY(regex_match_debug("/", regex("/", regex_constants::awk)));