Double forward slashes // used in a Cypher expression are tokenised as comments by the CypherLexer() no matter where they appear.

This blocks users from using URIs (for example) as parameter values.

from pygments.lexers import CypherLexer
lexer = CypherLexer()
s = '(p:Person {uri:"http://example.com/thing/1"})'
print(list(lexer.get_tokens(s)))

[(Token.Comment.Single, '(p:Person {uri="http://example.com/thing/1"})\n')]

I would like to be able to escape the slashes but have not had success with \/\/ or backticks. If character escaping cannot be used, perhaps the regular expression in the lexer could be modified? It could instead only capture comments which:

• begin the line
• appear anywhere but are preceded by whitespace

From:

        'comment': [
            (r'^.*//.*\n', Comment.Single),
        ]

To:

        'comment': [
            (r'(?:[\s^])(//.*)\n', Comment.Single),
        ]