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1# -*- coding: utf-8 -*- 

2""" 

3 pygments.lexers.iolang 

4 ~~~~~~~~~~~~~~~~~~~~~~ 

5 

6 Lexers for the Io language. 

7 

8 :copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS. 

9 :license: BSD, see LICENSE for details. 

10""" 

11 

12from pygments.lexer import RegexLexer 

13from pygments.token import Text, Comment, Operator, Keyword, Name, String, \ 

14 Number 

15 

16__all__ = ['IoLexer'] 

17 

18 

19class IoLexer(RegexLexer): 

20 """ 

21 For `Io <http://iolanguage.com/>`_ (a small, prototype-based 

22 programming language) source. 

23 

24 .. versionadded:: 0.10 

25 """ 

26 name = 'Io' 

27 filenames = ['*.io'] 

28 aliases = ['io'] 

29 mimetypes = ['text/x-iosrc'] 

30 tokens = { 

31 'root': [ 

32 (r'\n', Text), 

33 (r'\s+', Text), 

34 # Comments 

35 (r'//(.*?)\n', Comment.Single), 

36 (r'#(.*?)\n', Comment.Single), 

37 (r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline), 

38 (r'/\+', Comment.Multiline, 'nestedcomment'), 

39 # DoubleQuotedString 

40 (r'"(\\\\|\\[^\\]|[^"\\])*"', String), 

41 # Operators 

42 (r'::=|:=|=|\(|\)|;|,|\*|-|\+|>|<|@|!|/|\||\^|\.|%|&|\[|\]|\{|\}', 

43 Operator), 

44 # keywords 

45 (r'(clone|do|doFile|doString|method|for|if|else|elseif|then)\b', 

46 Keyword), 

47 # constants 

48 (r'(nil|false|true)\b', Name.Constant), 

49 # names 

50 (r'(Object|list|List|Map|args|Sequence|Coroutine|File)\b', 

51 Name.Builtin), 

52 (r'[a-zA-Z_]\w*', Name), 

53 # numbers 

54 (r'(\d+\.?\d*|\d*\.\d+)([eE][+-]?[0-9]+)?', Number.Float), 

55 (r'\d+', Number.Integer) 

56 ], 

57 'nestedcomment': [ 

58 (r'[^+/]+', Comment.Multiline), 

59 (r'/\+', Comment.Multiline, '#push'), 

60 (r'\+/', Comment.Multiline, '#pop'), 

61 (r'[+/]', Comment.Multiline), 

62 ] 

63 }