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"""
pygments.lexers.eiffel
~~~~~~~~~~~~~~~~~~~~~~
Lexer for the Eiffel language.
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, include, words, bygroups
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Whitespace
__all__ = ['EiffelLexer']
class EiffelLexer(RegexLexer):
"""
For `Eiffel <http://www.eiffel.com>`_ source code.
.. versionadded:: 2.0
"""
name = 'Eiffel'
aliases = ['eiffel']
filenames = ['*.e']
mimetypes = ['text/x-eiffel']
tokens = {
'root': [
(r'[^\S\n]+', Whitespace),
(r'--.*?$', Comment.Single),
(r'[^\S\n]+', Whitespace),
# Please note that keyword and operator are case insensitive.
(r'(?i)(true|false|void|current|result|precursor)\b', Keyword.Constant),
(r'(?i)(not|xor|implies|or)\b', Operator.Word),
(r'(?i)(and)(?:(\s+)(then))?\b', bygroups(Operator.Word, Whitespace, Operator.Word)),
(r'(?i)(or)(?:(\s+)(else))?\b', bygroups(Operator.Word, Whitespace, Operator.Word)),
(words((
'across', 'agent', 'alias', 'all', 'as', 'assign', 'attached',
'attribute', 'check', 'class', 'convert', 'create', 'debug',
'deferred', 'detachable', 'do', 'else', 'elseif', 'end', 'ensure',
'expanded', 'export', 'external', 'feature', 'from', 'frozen', 'if',
'inherit', 'inspect', 'invariant', 'like', 'local', 'loop', 'none',
'note', 'obsolete', 'old', 'once', 'only', 'redefine', 'rename',
'require', 'rescue', 'retry', 'select', 'separate', 'then',
'undefine', 'until', 'variant', 'when'), prefix=r'(?i)\b', suffix=r'\b'),
Keyword.Reserved),
(r'"\[([^\]%]|%(.|\n)|\][^"])*?\]"', String),
(r'"([^"%\n]|%.)*?"', String),
include('numbers'),
(r"'([^'%]|%'|%%)'", String.Char),
(r"(//|\\\\|>=|<=|:=|/=|~|/~|[\\?!#%&@|+/\-=>*$<^\[\]])", Operator),
(r"([{}():;,.])", Punctuation),
(r'([a-z]\w*)|([A-Z][A-Z0-9_]*[a-z]\w*)', Name),
(r'([A-Z][A-Z0-9_]*)', Name.Class),
(r'\n+', Whitespace),
],
'numbers': [
(r'0[xX][a-fA-F0-9]+', Number.Hex),
(r'0[bB][01]+', Number.Bin),
(r'0[cC][0-7]+', Number.Oct),
(r'([0-9]+\.[0-9]*)|([0-9]*\.[0-9]+)', Number.Float),
(r'[0-9]+', Number.Integer),
],
}
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