parser.py 文件源码

def parse_block(self):
        node = nodes.Block(lineno=next(self.stream).lineno)
        node.name = self.stream.expect('name').value
        node.scoped = self.stream.skip_if('name:scoped')

        # common problem people encounter when switching from django
        # to jinja.  we do not support hyphens in block names, so let's
        # raise a nicer error message in that case.
        if self.stream.current.type == 'sub':
            self.fail('Block names in Jinja have to be valid Python '
                      'identifiers and may not contain hypens, use an '
                      'underscore instead.')

        node.body = self.parse_statements(('name:endblock',), drop_needle=True)
        self.stream.skip_if('name:' + node.name)
        return node