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