bottle.py 文件源码

def _itertokens(self, rule):
        offset, prefix = 0, ''
        for match in self.rule_syntax.finditer(rule):
            prefix += rule[offset:match.start()]
            g = match.groups()
            if g[2] is not None:
                depr(0, 13, "Use of old route syntax.",
                            "Use <name> instead of :name in routes.")
            if len(g[0]) % 2:  # Escaped wildcard
                prefix += match.group(0)[len(g[0]):]
                offset = match.end()
                continue
            if prefix:
                yield prefix, None, None
            name, filtr, conf = g[4:7] if g[2] is None else g[1:4]
            yield name, filtr or 'default', conf or None
            offset, prefix = match.end(), ''
        if offset <= len(rule) or prefix:
            yield prefix + rule[offset:], None, None