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109 lines
4.0 KiB
Python
109 lines
4.0 KiB
Python
"""
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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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# based on https://neo4j.com/docs/cypher-refcard/3.3/
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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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