This is called with the stream as returned by `tokenize` and wraps
        every token in a :class:`Token` and converts the value.

def wrap(self, stream, name=None, filename=None):
        """This is called with the stream as returned by `tokenize` and wraps
        every token in a :class:`Token` and converts the value.
        """
        for lineno, token, value in stream:
            if token in ignored_tokens:
                continue
            elif token == 'linestatement_begin':
                token = 'block_begin'
            elif token == 'linestatement_end':
                token = 'block_end'
            # we are not interested in those tokens in the parser
            elif token in ('raw_begin', 'raw_end'):
                continue
            elif token == 'data':
                value = self._normalize_newlines(value)
            elif token == 'keyword':
                token = value
            elif token == 'name':
                value = str(value)
                if check_ident and not value.isidentifier():
                    raise TemplateSyntaxError(
                        'Invalid character in identifier',
                        lineno, name, filename)
            elif token == 'string':
                # try to unescape string
                try:
                    value = self._normalize_newlines(value[1:-1]) \
                        .encode('ascii', 'backslashreplace') \
                        .decode('unicode-escape')
                except Exception as e:
                    msg = str(e).split(':')[-1].strip()
                    raise TemplateSyntaxError(msg, lineno, name, filename)
            elif token == 'integer':
                value = int(value)
            elif token == 'float':
                value = float(value)
            elif token == 'operator':
                token = operators[value]
            yield Token(lineno, token, value)