RE_SYNTAX_POSIX_EXTENDED
((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DEBUG) \
(RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS \
RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC;
(RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS)
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED