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69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
"""
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pygments.lexers.eiffel
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~~~~~~~~~~~~~~~~~~~~~~
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Lexer for the Eiffel language.
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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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from pygments.lexer import RegexLexer, include, words, bygroups
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from pygments.token import Comment, Operator, Keyword, Name, String, Number, \
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Punctuation, Whitespace
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__all__ = ['EiffelLexer']
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class EiffelLexer(RegexLexer):
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"""
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For Eiffel source code.
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"""
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name = 'Eiffel'
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url = 'https://www.eiffel.com'
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aliases = ['eiffel']
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filenames = ['*.e']
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mimetypes = ['text/x-eiffel']
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version_added = '2.0'
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tokens = {
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'root': [
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(r'[^\S\n]+', Whitespace),
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(r'--.*?$', Comment.Single),
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(r'[^\S\n]+', Whitespace),
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# Please note that keyword and operator are case insensitive.
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(r'(?i)(true|false|void|current|result|precursor)\b', Keyword.Constant),
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(r'(?i)(not|xor|implies|or)\b', Operator.Word),
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(r'(?i)(and)(?:(\s+)(then))?\b',
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bygroups(Operator.Word, Whitespace, Operator.Word)),
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(r'(?i)(or)(?:(\s+)(else))?\b',
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bygroups(Operator.Word, Whitespace, Operator.Word)),
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(words((
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'across', 'agent', 'alias', 'all', 'as', 'assign', 'attached',
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'attribute', 'check', 'class', 'convert', 'create', 'debug',
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'deferred', 'detachable', 'do', 'else', 'elseif', 'end', 'ensure',
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'expanded', 'export', 'external', 'feature', 'from', 'frozen', 'if',
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'inherit', 'inspect', 'invariant', 'like', 'local', 'loop', 'none',
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'note', 'obsolete', 'old', 'once', 'only', 'redefine', 'rename',
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'require', 'rescue', 'retry', 'select', 'separate', 'then',
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'undefine', 'until', 'variant', 'when'), prefix=r'(?i)\b', suffix=r'\b'),
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Keyword.Reserved),
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(r'"\[([^\]%]|%(.|\n)|\][^"])*?\]"', String),
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(r'"([^"%\n]|%.)*?"', String),
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include('numbers'),
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(r"'([^'%]|%'|%%)'", String.Char),
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(r"(//|\\\\|>=|<=|:=|/=|~|/~|[\\?!#%&@|+/\-=>*$<^\[\]])", Operator),
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(r"([{}():;,.])", Punctuation),
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(r'([a-z]\w*)|([A-Z][A-Z0-9_]*[a-z]\w*)', Name),
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(r'([A-Z][A-Z0-9_]*)', Name.Class),
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(r'\n+', Whitespace),
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],
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'numbers': [
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(r'0[xX][a-fA-F0-9]+', Number.Hex),
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(r'0[bB][01]+', Number.Bin),
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(r'0[cC][0-7]+', Number.Oct),
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(r'([0-9]+\.[0-9]*)|([0-9]*\.[0-9]+)', Number.Float),
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(r'[0-9]+', Number.Integer),
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],
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}
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