83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
"""
|
|
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)
|
|
]
|
|
}
|