Shortcuts on this page
r m x toggle line displays
j k next/prev highlighted chunk
0 (zero) top of page
1 (one) first highlighted chunk
1"""
2 pygments.lexers.arrow
3 ~~~~~~~~~~~~~~~~~~~~~
5 Lexer for Arrow.
7 :copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
8 :license: BSD, see LICENSE for details.
9"""
11from pygments.lexer import RegexLexer, bygroups, default, include
12from pygments.token import Text, Operator, Keyword, Punctuation, Name, \
13 String, Number, Whitespace
15__all__ = ['ArrowLexer']
17TYPES = r'\b(int|bool|char)((?:\[\])*)(?=\s+)'
18IDENT = r'([a-zA-Z_][a-zA-Z0-9_]*)'
19DECL = TYPES + r'(\s+)' + IDENT
22class ArrowLexer(RegexLexer):
23 """
24 Lexer for Arrow
25 """
27 name = 'Arrow'
28 url = 'https://pypi.org/project/py-arrow-lang/'
29 aliases = ['arrow']
30 filenames = ['*.arw']
31 version_added = '2.7'
33 tokens = {
34 'root': [
35 (r'\s+', Whitespace),
36 (r'^[|\s]+', Punctuation),
37 include('blocks'),
38 include('statements'),
39 include('expressions'),
40 ],
41 'blocks': [
42 (r'(function)(\n+)(/-->)(\s*)' +
43 DECL + # 4 groups
44 r'(\()', bygroups(
45 Keyword.Reserved, Whitespace, Punctuation,
46 Whitespace, Keyword.Type, Punctuation, Whitespace,
47 Name.Function, Punctuation
48 ), 'fparams'),
49 (r'/-->$|\\-->$|/--<|\\--<|\^', Punctuation),
50 ],
51 'statements': [
52 (DECL, bygroups(Keyword.Type, Punctuation, Text, Name.Variable)),
53 (r'\[', Punctuation, 'index'),
54 (r'=', Operator),
55 (r'require|main', Keyword.Reserved),
56 (r'print', Keyword.Reserved, 'print'),
57 ],
58 'expressions': [
59 (r'\s+', Whitespace),
60 (r'[0-9]+', Number.Integer),
61 (r'true|false', Keyword.Constant),
62 (r"'", String.Char, 'char'),
63 (r'"', String.Double, 'string'),
64 (r'\{', Punctuation, 'array'),
65 (r'==|!=|<|>|\+|-|\*|/|%', Operator),
66 (r'and|or|not|length', Operator.Word),
67 (r'(input)(\s+)(int|char\[\])', bygroups(
68 Keyword.Reserved, Whitespace, Keyword.Type
69 )),
70 (IDENT + r'(\()', bygroups(
71 Name.Function, Punctuation
72 ), 'fargs'),
73 (IDENT, Name.Variable),
74 (r'\[', Punctuation, 'index'),
75 (r'\(', Punctuation, 'expressions'),
76 (r'\)', Punctuation, '#pop'),
77 ],
78 'print': [
79 include('expressions'),
80 (r',', Punctuation),
81 default('#pop'),
82 ],
83 'fparams': [
84 (DECL, bygroups(Keyword.Type, Punctuation, Whitespace, Name.Variable)),
85 (r',', Punctuation),
86 (r'\)', Punctuation, '#pop'),
87 ],
88 'escape': [
89 (r'\\(["\\/abfnrtv]|[0-9]{1,3}|x[0-9a-fA-F]{2}|u[0-9a-fA-F]{4})',
90 String.Escape),
91 ],
92 'char': [
93 (r"'", String.Char, '#pop'),
94 include('escape'),
95 (r"[^'\\]", String.Char),
96 ],
97 'string': [
98 (r'"', String.Double, '#pop'),
99 include('escape'),
100 (r'[^"\\]+', String.Double),
101 ],
102 'array': [
103 include('expressions'),
104 (r'\}', Punctuation, '#pop'),
105 (r',', Punctuation),
106 ],
107 'fargs': [
108 include('expressions'),
109 (r'\)', Punctuation, '#pop'),
110 (r',', Punctuation),
111 ],
112 'index': [
113 include('expressions'),
114 (r'\]', Punctuation, '#pop'),
115 ],
116 }