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85 lines
2.7 KiB
85 lines
2.7 KiB
4 years ago
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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 2006-2021 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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<https://neo4j.com/docs/developer-manual/3.3/cypher/>`_
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For the Cypher version in Neo4j 3.3
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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|true|false)\b', Keyword),
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],
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'clauses': [
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# based on https://neo4j.com/docs/cypher-refcard/3.3/
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(r'(all|any|as|asc|ascending|assert|call|case|create|'
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r'create\s+index|create\s+unique|delete|desc|descending|'
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r'distinct|drop\s+constraint\s+on|drop\s+index\s+on|end|'
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r'ends\s+with|fieldterminator|foreach|in|is\s+node\s+key|'
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r'is\s+null|is\s+unique|limit|load\s+csv\s+from|match|merge|none|'
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r'not|null|on\s+match|on\s+create|optional\s+match|order\s+by|'
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r'remove|return|set|skip|single|start|starts\s+with|then|union|'
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r'union\s+all|unwind|using\s+periodic\s+commit|yield|where|when|'
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r'with)\b', 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'(-\[)(.*?)(\]-)', 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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