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# -*- coding: utf-8 -*-
"""
pygments.lexers.graph
~~~~~~~~~~~~~~~~~~~~~
Lexers for graph query languages.
:copyright: Copyright 2006-2014 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import RegexLexer, include, bygroups
from pygments.token import Keyword, Punctuation, Text, Comment, Operator, Name,\
String, Number, Generic
__all__ = ['CypherLexer']
class CypherLexer(RegexLexer):
"""
For `Cypher Query Language
<http://docs.neo4j.org/chunked/milestone/cypher-query-lang.html>`_
For the Cypher version in Neo4J 2.0
.. versionadded:: 2.0
"""
name = 'Cypher'
aliases = ['cypher']
filenames = ['*.cyp','*.cypher']
flags = re.MULTILINE | re.IGNORECASE
tokens = {
'root': [
include('comment'),
include('keywords'),
include('clauses'),
include('relations'),
include('strings')
],
'comment': [(r'^.*//.*\n', Comment.Single)],
'keywords': [
(r'create|order|match|limit|set|skip|start|return|with|where|delete'
r'|foreach|not| by ', Keyword)],
'clauses': [(r' all | any | as | asc |create|create unique|delete|'
r'desc |distinct|foreach| in |is null|limit|match|none|'
r'order by|return|set|skip|single|start|union|where|with',
Keyword)],
'relations': [(r'-->|-\[.*\]->|<-\[.*\]-|<--|\[|\]', Operator),
(r'<|>|<>|=|<=|=>|\(|\)|\||:|,|;', Punctuation)],
'strings': [(r'\".*\"', String)]
}
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