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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 2006-2025 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, words |
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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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For the Cypher version in Neo4j 3.3 |
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""" |
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name = 'Cypher' |
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url = 'https://neo4j.com/docs/developer-manual/3.3/cypher/' |
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aliases = ['cypher'] |
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filenames = ['*.cyp', '*.cypher'] |
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version_added = '2.0' |
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flags = re.MULTILINE | re.IGNORECASE |
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tokens = { |
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'root': [ |
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include('clauses'), |
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include('keywords'), |
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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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include('comment'), |
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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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(r'(create)(\s+)(index|unique)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(drop)(\s+)(contraint|index)(\s+)(on)\b', |
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bygroups(Keyword, Whitespace, Keyword, Whitespace, Keyword)), |
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(r'(ends)(\s+)(with)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(is)(\s+)(node)(\s+)(key)\b', |
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bygroups(Keyword, Whitespace, Keyword, Whitespace, Keyword)), |
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(r'(is)(\s+)(null|unique)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(load)(\s+)(csv)(\s+)(from)\b', |
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bygroups(Keyword, Whitespace, Keyword, Whitespace, Keyword)), |
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(r'(on)(\s+)(match|create)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(optional)(\s+)(match)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(order)(\s+)(by)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(starts)(\s+)(with)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(union)(\s+)(all)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(using)(\s+)(periodic)(\s+)(commit)\b', |
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bygroups(Keyword, Whitespace, Keyword, Whitespace, Keyword)), |
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(r'(using)(\s+)(index)\b', |
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bygroups(Keyword, Whitespace, Keyword)), |
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(r'(using)(\s+)(range|text|point)(\s+)(index)\b', |
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bygroups(Keyword, Whitespace, Name, Whitespace, Keyword)), |
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(words(( |
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'all', 'any', 'as', 'asc', 'ascending', 'assert', 'call', 'case', 'create', |
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'delete', 'desc', 'descending', 'distinct', 'end', 'fieldterminator', |
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'foreach', 'in', 'limit', 'match', 'merge', 'none', 'not', 'null', |
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'remove', 'return', 'set', 'skip', 'single', 'start', 'then', 'union', |
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'unwind', 'yield', 'where', 'when', 'with', 'collect'), suffix=r'\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\'"\\]|[^\\])*?\1', 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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'comment': [ |
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(r'//.*$', Comment.Single), |
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], |
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} |
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