"" "
pygments.lexers.snobol
~~~~~~~~~~~~~~~~~~~~~~
Lexers
for the SNOBOL language.
:copyright: Copyright 2006-2024 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 state, start of line
# comments, continuation lines, and directives start in column 1
# as do labels
'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 state, line after continuation or label
'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),
# ASCII equivalents of original operators
# | for the EBCDIC equivalent, ! likewise
# \ for EBCDIC negation
(r
'\*\*|[?$.!%*/#+\-@|&\\=]', Operator),
(r
'"[^"]*"' , String),
(r
"'[^']*'" , String),
# Accept SPITBOL syntax for real numbers
# as well as Macro SNOBOL4
(r
'[0-9]+(?=[^.EeDd])' , Number.Integer),
(r
'[0-9]+(\.[0-9]*)?([EDed][-+]?[0-9]+)?' , Number.Float),
# Goto
(r
':' , Punctuation,
'goto' ),
(r
'[()<>,;]' , Punctuation),
],
# Goto block
'goto' : [
(r
'\s*\n' , Text,
"#pop:2"),
(r
'\s+' , Text),
(r
'F|S' , Keyword),
(r
'(\()([A-Za-z][\w.]*)(\))' ,
bygroups(Punctuation, Name.Label, Punctuation))
],
# everything after the END statement is basically one
# big heredoc.
'heredoc' : [
(r
'.*\n' , String.Heredoc)
]
}
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