|
""" |
|
pygments.lexers.snobol |
|
~~~~~~~~~~~~~~~~~~~~~~ |
|
|
|
Lexers for the SNOBOL language. |
|
|
|
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS. |
|
:license: BSD, see LICENSE for details. |
|
""" |
|
|
|
from pygments.lexer import RegexLexer, bygroups |
|
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \ |
|
Number, Punctuation |
|
|
|
__all__ = ['SnobolLexer'] |
|
|
|
|
|
class SnobolLexer(RegexLexer): |
|
""" |
|
Lexer for the SNOBOL4 programming language. |
|
|
|
Recognizes the common ASCII equivalents of the original SNOBOL4 operators. |
|
Does not require spaces around binary operators. |
|
""" |
|
|
|
name = "Snobol" |
|
aliases = ["snobol"] |
|
filenames = ['*.snobol'] |
|
mimetypes = ['text/x-snobol'] |
|
url = 'https://www.regressive.org/snobol4' |
|
version_added = '1.5' |
|
|
|
tokens = { |
|
|
|
|
|
|
|
'root': [ |
|
(r'\*.*\n', Comment), |
|
(r'[+.] ', Punctuation, 'statement'), |
|
(r'-.*\n', Comment), |
|
(r'END\s*\n', Name.Label, 'heredoc'), |
|
(r'[A-Za-z$][\w$]*', Name.Label, 'statement'), |
|
(r'\s+', Text, 'statement'), |
|
], |
|
|
|
'statement': [ |
|
(r'\s*\n', Text, '#pop'), |
|
(r'\s+', Text), |
|
(r'(?<=[^\w.])(LT|LE|EQ|NE|GE|GT|INTEGER|IDENT|DIFFER|LGT|SIZE|' |
|
r'REPLACE|TRIM|DUPL|REMDR|DATE|TIME|EVAL|APPLY|OPSYN|LOAD|UNLOAD|' |
|
r'LEN|SPAN|BREAK|ANY|NOTANY|TAB|RTAB|REM|POS|RPOS|FAIL|FENCE|' |
|
r'ABORT|ARB|ARBNO|BAL|SUCCEED|INPUT|OUTPUT|TERMINAL)(?=[^\w.])', |
|
Name.Builtin), |
|
(r'[A-Za-z][\w.]*', Name), |
|
|
|
|
|
|
|
(r'\*\*|[?$.!%*/#+\-@|&\\=]', Operator), |
|
(r'"[^"]*"', String), |
|
(r"'[^']*'", String), |
|
|
|
|
|
(r'[0-9]+(?=[^.EeDd])', Number.Integer), |
|
(r'[0-9]+(\.[0-9]*)?([EDed][-+]?[0-9]+)?', Number.Float), |
|
|
|
(r':', Punctuation, 'goto'), |
|
(r'[()<>,;]', Punctuation), |
|
], |
|
|
|
'goto': [ |
|
(r'\s*\n', Text, "#pop:2"), |
|
(r'\s+', Text), |
|
(r'F|S', Keyword), |
|
(r'(\()([A-Za-z][\w.]*)(\))', |
|
bygroups(Punctuation, Name.Label, Punctuation)) |
|
], |
|
|
|
|
|
'heredoc': [ |
|
(r'.*\n', String.Heredoc) |
|
] |
|
} |
|
|