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1"""
2 pygments.lexers.wren
3 ~~~~~~~~~~~~~~~~~~~~
5 Lexer for Wren.
7 :copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
8 :license: BSD, see LICENSE for details.
9"""
11import re
13from pygments.lexer import include, RegexLexer, words
14from pygments.token import Whitespace, Punctuation, Keyword, Name, Comment, \
15 Operator, Number, String
17__all__ = ['WrenLexer']
19class WrenLexer(RegexLexer):
20 """
21 For Wren source code, version 0.4.0.
22 """
23 name = 'Wren'
24 url = 'https://wren.io'
25 aliases = ['wren']
26 filenames = ['*.wren']
27 version_added = '2.14'
29 flags = re.MULTILINE | re.DOTALL
31 tokens = {
32 'root': [
33 # Whitespace.
34 (r'\s+', Whitespace),
35 (r'[,\\\[\]{}]', Punctuation),
37 # Really 'root', not '#push': in 'interpolation',
38 # parentheses inside the interpolation expression are
39 # Punctuation, not String.Interpol.
40 (r'\(', Punctuation, 'root'),
41 (r'\)', Punctuation, '#pop'),
43 # Keywords.
44 (words((
45 'as', 'break', 'class', 'construct', 'continue', 'else',
46 'for', 'foreign', 'if', 'import', 'return', 'static', 'super',
47 'this', 'var', 'while'), prefix = r'(?<!\.)',
48 suffix = r'\b'), Keyword),
50 (words((
51 'true', 'false', 'null'), prefix = r'(?<!\.)',
52 suffix = r'\b'), Keyword.Constant),
54 (words((
55 'in', 'is'), prefix = r'(?<!\.)',
56 suffix = r'\b'), Operator.Word),
58 # Comments.
59 (r'/\*', Comment.Multiline, 'comment'), # Multiline, can nest.
60 (r'//.*?$', Comment.Single), # Single line.
61 (r'#.*?(\(.*?\))?$', Comment.Special), # Attribute or shebang.
63 # Names and operators.
64 (r'[!%&*+\-./:<=>?\\^|~]+', Operator),
65 (r'[a-z][a-zA-Z_0-9]*', Name),
66 (r'[A-Z][a-zA-Z_0-9]*', Name.Class),
67 (r'__[a-zA-Z_0-9]*', Name.Variable.Class),
68 (r'_[a-zA-Z_0-9]*', Name.Variable.Instance),
70 # Numbers.
71 (r'0x[0-9a-fA-F]+', Number.Hex),
72 (r'\d+(\.\d+)?([eE][-+]?\d+)?', Number.Float),
74 # Strings.
75 (r'""".*?"""', String), # Raw string
76 (r'"', String, 'string'), # Other string
77 ],
78 'comment': [
79 (r'/\*', Comment.Multiline, '#push'),
80 (r'\*/', Comment.Multiline, '#pop'),
81 (r'([^*/]|\*(?!/)|/(?!\*))+', Comment.Multiline),
82 ],
83 'string': [
84 (r'"', String, '#pop'),
85 (r'\\[\\%"0abefnrtv]', String.Escape), # Escape.
86 (r'\\x[a-fA-F0-9]{2}', String.Escape), # Byte escape.
87 (r'\\u[a-fA-F0-9]{4}', String.Escape), # Unicode escape.
88 (r'\\U[a-fA-F0-9]{8}', String.Escape), # Long Unicode escape.
90 (r'%\(', String.Interpol, 'interpolation'),
91 (r'[^\\"%]+', String), # All remaining characters.
92 ],
93 'interpolation': [
94 # redefine closing paren to be String.Interpol
95 (r'\)', String.Interpol, '#pop'),
96 include('root'),
97 ],
98 }