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"""
pygments.lexers.iolang
~~~~~~~~~~~~~~~~~~~~~~
Lexers for the Io language.
:copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer
from pygments.token import Comment, Operator, Keyword, Name, String, Number, \
Whitespace
__all__ = ['IoLexer']
class IoLexer(RegexLexer):
"""
For Io (a small, prototype-based programming language) source.
.. versionadded:: 0.10
"""
name = 'Io'
url = 'http://iolanguage.com/'
filenames = ['*.io']
aliases = ['io']
mimetypes = ['text/x-iosrc']
tokens = {
'root': [
(r'\n', Whitespace),
(r'\s+', Whitespace),
# Comments
(r'//(.*?)$', Comment.Single),
(r'#(.*?)$', Comment.Single),
(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
(r'/\+', Comment.Multiline, 'nestedcomment'),
# DoubleQuotedString
(r'"(\\\\|\\[^\\]|[^"\\])*"', String),
# Operators
(r'::=|:=|=|\(|\)|;|,|\*|-|\+|>|<|@|!|/|\||\^|\.|%|&|\[|\]|\{|\}',
Operator),
# keywords
(r'(clone|do|doFile|doString|method|for|if|else|elseif|then)\b',
Keyword),
# constants
(r'(nil|false|true)\b', Name.Constant),
# names
(r'(Object|list|List|Map|args|Sequence|Coroutine|File)\b',
Name.Builtin),
(r'[a-zA-Z_]\w*', Name),
# numbers
(r'(\d+\.?\d*|\d*\.\d+)([eE][+-]?[0-9]+)?', Number.Float),
(r'\d+', Number.Integer)
],
'nestedcomment': [
(r'[^+/]+', Comment.Multiline),
(r'/\+', Comment.Multiline, '#push'),
(r'\+/', Comment.Multiline, '#pop'),
(r'[+/]', Comment.Multiline),
]
}