def _parse_bracketed_uri_scheme(self):
        """Parse the URI scheme of a bracket-enclosed external link."""
        self._push(contexts.EXT_LINK_URI)
        if self._read() == self._read(1) == "/":
            self._emit_text("//")
            self._head += 2
        else:
            valid = "abcdefghijklmnopqrstuvwxyz0123456789+.-"
            all_valid = lambda: all(char in valid for char in self._read())
            scheme = ""
            while self._read() is not self.END and all_valid():
                scheme += self._read()
                self._emit_text(self._read())
                self._head += 1
            if self._read() != ":":
                self._fail_route()
            self._emit_text(":")
            self._head += 1
            slashes = self._read() == self._read(1) == "/"
            if slashes:
                self._emit_text("//")
                self._head += 2
            if not is_scheme(scheme, slashes):
                self._fail_route()
def _parse_bracketed_uri_scheme ( self ) : self . _push ( contexts . EXT_LINK_URI ) if self . _read ( ) == self . _read ( 1 ) == "/" : self . _emit_text ( "//" ) self . _head += 2 else : valid = "abcdefghijklmnopqrstuvwxyz0123456789+.-" all_valid = lambda : all ( char in valid for char in self . _read ( ) ) scheme = "" while self . _read ( ) is not self . END and all_valid ( ) : scheme += self . _read ( ) self . _emit_text ( self . _read ( ) ) self . _head += 1 if self . _read ( ) != ":" : self . _fail_route ( ) self . _emit_text ( ":" ) self . _head += 1 slashes = self . _read ( ) == self . _read ( 1 ) == "/" if slashes : self . _emit_text ( "//" ) self . _head += 2 if not is_scheme ( scheme , slashes ) : self . _fail_route ( )
Parse the URI scheme of a bracket-enclosed external link.