Function _combine_flags

Lib/re/_compiler.py:33–37

(flags, add_flags, del_flags,
                   TYPE_FLAGS=_parser.TYPE_FLAGS)

_CHARSET_ALL = [(NEGATE, None)]

def _combine_flags(flags, add_flags, del_flags,
                   TYPE_FLAGS=_parser.TYPE_FLAGS):
    if add_flags & TYPE_FLAGS:
        flags &= ~TYPE_FLAGS
    return (flags | add_flags) & ~del_flags

def _compile(code, pattern, flags):
    # internal: compile a (sub)pattern