j.pyā¢4.85 kB
"""
pygments.lexers.j
~~~~~~~~~~~~~~~~~
Lexer for the J programming language.
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, words, include, bygroups
from pygments.token import Comment, Keyword, Name, Number, Operator, \
Punctuation, String, Whitespace
__all__ = ['JLexer']
class JLexer(RegexLexer):
"""
For J source code.
"""
name = 'J'
url = 'http://jsoftware.com/'
aliases = ['j']
filenames = ['*.ijs']
mimetypes = ['text/x-j']
version_added = '2.1'
validName = r'\b[a-zA-Z]\w*'
tokens = {
'root': [
# Shebang script
(r'#!.*$', Comment.Preproc),
# Comments
(r'NB\..*', Comment.Single),
(r'(\n+\s*)(Note)', bygroups(Whitespace, Comment.Multiline),
'comment'),
(r'(\s*)(Note.*)', bygroups(Whitespace, Comment.Single)),
# Whitespace
(r'\s+', Whitespace),
# Strings
(r"'", String, 'singlequote'),
# Definitions
(r'0\s+:\s*0', Name.Entity, 'nounDefinition'),
(r'(noun)(\s+)(define)(\s*)$', bygroups(Name.Entity, Whitespace,
Name.Entity, Whitespace), 'nounDefinition'),
(r'([1-4]|13)\s+:\s*0\b',
Name.Function, 'explicitDefinition'),
(r'(adverb|conjunction|dyad|monad|verb)(\s+)(define)\b',
bygroups(Name.Function, Whitespace, Name.Function),
'explicitDefinition'),
# Flow Control
(words(('for_', 'goto_', 'label_'), suffix=validName+r'\.'), Name.Label),
(words((
'assert', 'break', 'case', 'catch', 'catchd',
'catcht', 'continue', 'do', 'else', 'elseif',
'end', 'fcase', 'for', 'if', 'return',
'select', 'throw', 'try', 'while', 'whilst',
), suffix=r'\.'), Name.Label),
# Variable Names
(validName, Name.Variable),
# Standard Library
(words((
'ARGV', 'CR', 'CRLF', 'DEL', 'Debug',
'EAV', 'EMPTY', 'FF', 'JVERSION', 'LF',
'LF2', 'Note', 'TAB', 'alpha17', 'alpha27',
'apply', 'bind', 'boxopen', 'boxxopen', 'bx',
'clear', 'cutLF', 'cutopen', 'datatype', 'def',
'dfh', 'drop', 'each', 'echo', 'empty',
'erase', 'every', 'evtloop', 'exit', 'expand',
'fetch', 'file2url', 'fixdotdot', 'fliprgb', 'getargs',
'getenv', 'hfd', 'inv', 'inverse', 'iospath',
'isatty', 'isutf8', 'items', 'leaf', 'list',
'nameclass', 'namelist', 'names', 'nc',
'nl', 'on', 'pick', 'rows',
'script', 'scriptd', 'sign', 'sminfo', 'smoutput',
'sort', 'split', 'stderr', 'stdin', 'stdout',
'table', 'take', 'timespacex', 'timex', 'tmoutput',
'toCRLF', 'toHOST', 'toJ', 'tolower', 'toupper',
'type', 'ucp', 'ucpcount', 'usleep', 'utf8',
'uucp',
)), Name.Function),
# Copula
(r'=[.:]', Operator),
# Builtins
(r'[-=+*#$%@!~`^&";:.,<>{}\[\]\\|/?]', Operator),
# Short Keywords
(r'[abCdDeEfHiIjLMoprtT]\.', Keyword.Reserved),
(r'[aDiLpqsStux]\:', Keyword.Reserved),
(r'(_[0-9])\:', Keyword.Constant),
# Parens
(r'\(', Punctuation, 'parentheses'),
# Numbers
include('numbers'),
],
'comment': [
(r'[^)]', Comment.Multiline),
(r'^\)', Comment.Multiline, '#pop'),
(r'[)]', Comment.Multiline),
],
'explicitDefinition': [
(r'\b[nmuvxy]\b', Name.Decorator),
include('root'),
(r'[^)]', Name),
(r'^\)', Name.Label, '#pop'),
(r'[)]', Name),
],
'numbers': [
(r'\b_{1,2}\b', Number),
(r'_?\d+(\.\d+)?(\s*[ejr]\s*)_?\d+(\.?=\d+)?', Number),
(r'_?\d+\.(?=\d+)', Number.Float),
(r'_?\d+x', Number.Integer.Long),
(r'_?\d+', Number.Integer),
],
'nounDefinition': [
(r'[^)]+', String),
(r'^\)', Name.Label, '#pop'),
(r'[)]', String),
],
'parentheses': [
(r'\)', Punctuation, '#pop'),
# include('nounDefinition'),
include('explicitDefinition'),
include('root'),
],
'singlequote': [
(r"[^']+", String),
(r"''", String),
(r"'", String, '#pop'),
],
}