ext.py 文件源码

def _parse_block(self, parser, allow_pluralize):
        """Parse until the next block tag with a given name."""
        referenced = []
        buf = []
        while 1:
            if parser.stream.current.type == 'data':
                buf.append(parser.stream.current.value.replace('%', '%%'))
                next(parser.stream)
            elif parser.stream.current.type == 'variable_begin':
                next(parser.stream)
                name = parser.stream.expect('name').value
                referenced.append(name)
                buf.append('%%(%s)s' % name)
                parser.stream.expect('variable_end')
            elif parser.stream.current.type == 'block_begin':
                next(parser.stream)
                if parser.stream.current.test('name:endtrans'):
                    break
                elif parser.stream.current.test('name:pluralize'):
                    if allow_pluralize:
                        break
                    parser.fail('a translatable section can have only one '
                                'pluralize section')
                parser.fail('control structures in translatable sections are '
                            'not allowed')
            elif parser.stream.eos:
                parser.fail('unclosed translation block')
            else:
                assert False, 'internal parser error'

        return referenced, concat(buf)