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"""
pygments.lexers.maxima
~~~~~~~~~~~~~~~~~~~~~~
Lexer for the computer algebra system Maxima.
Derived from pygments/lexers/algebra.py.
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import RegexLexer, bygroups, words
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation
__all__ = ['MaximaLexer']
class MaximaLexer(RegexLexer):
"""
A `Maxima <http://maxima.sourceforge.net>`_ lexer.
Derived from pygments.lexers.MuPADLexer.
.. versionadded:: 2.11
"""
name = 'Maxima'
aliases = ['maxima', 'macsyma']
filenames = ['*.mac', '*.max']
keywords = ('if', 'then', 'else', 'elseif',
'do', 'while', 'repeat', 'until',
'for', 'from', 'to', 'downto', 'step', 'thru')
constants = ('%pi', '%e', '%phi', '%gamma', '%i',
'und', 'ind', 'infinity', 'inf', 'minf',
'true', 'false', 'unknown', 'done')
operators = (r'.', r':', r'=', r'#',
r'+', r'-', r'*', r'/', r'^',
r'@', r'>', r'<', r'|', r'!', r"'")
operator_words = ('and', 'or', 'not')
tokens = {
'root': [
(r'/\*', Comment.Multiline, 'comment'),
(r'"(?:[^"\\]|\\.)*"', String),
(r'\(|\)|\[|\]|\{|\}', Punctuation),
(r'[,;$]', Punctuation),
(words (constants), Name.Constant),
(words (keywords), Keyword),
(words (operators), Operator),
(words (operator_words), Operator.Word),
(r'''(?x)
((?:[a-zA-Z_#][\w#]*|`[^`]*`)
(?:::[a-zA-Z_#][\w#]*|`[^`]*`)*)(\s*)([(])''',
bygroups(Name.Function, Text.Whitespace, Punctuation)),
(r'''(?x)
(?:[a-zA-Z_#%][\w#%]*|`[^`]*`)
(?:::[a-zA-Z_#%][\w#%]*|`[^`]*`)*''', Name.Variable),
(r'[-+]?(\d*\.\d+([bdefls][-+]?\d+)?|\d+(\.\d*)?[bdefls][-+]?\d+)', Number.Float),
(r'[-+]?\d+', Number.Integer),
(r'\s+', Text.Whitespace),
(r'.', Text)
],
'comment': [
(r'[^*/]+', Comment.Multiline),
(r'/\*', Comment.Multiline, '#push'),
(r'\*/', Comment.Multiline, '#pop'),
(r'[*/]', Comment.Multiline)
]
}
def analyse_text (text):
strength = 0.0
# Input expression terminator.
if re.search (r'\$\s*$', text, re.MULTILINE):
strength += 0.05
# Function definition operator.
if ':=' in text:
strength += 0.02
return strength
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