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"""
pygments.lexers.rnc
~~~~~~~~~~~~~~~~~~~
Lexer for Relax-NG Compact syntax
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Punctuation
__all__ = ['RNCCompactLexer']
class RNCCompactLexer(RegexLexer):
"""
For `RelaxNG-compact <http://relaxng.org>`_ syntax.
.. versionadded:: 2.2
"""
name = 'Relax-NG Compact'
aliases = ['rng-compact', 'rnc']
filenames = ['*.rnc']
tokens = {
'root': [
(r'namespace\b', Keyword.Namespace),
(r'(?:default|datatypes)\b', Keyword.Declaration),
(r'##.*$', Comment.Preproc),
(r'#.*$', Comment.Single),
(r'"[^"]*"', String.Double),
# TODO single quoted strings and escape sequences outside of
# double-quoted strings
(r'(?:element|attribute|mixed)\b', Keyword.Declaration, 'variable'),
(r'(text\b|xsd:[^ ]+)', Keyword.Type, 'maybe_xsdattributes'),
(r'[,?&*=|~]|>>', Operator),
(r'[(){}]', Punctuation),
(r'.', Text),
],
# a variable has been declared using `element` or `attribute`
'variable': [
(r'[^{]+', Name.Variable),
(r'\{', Punctuation, '#pop'),
],
# after an xsd:<datatype> declaration there may be attributes
'maybe_xsdattributes': [
(r'\{', Punctuation, 'xsdattributes'),
(r'\}', Punctuation, '#pop'),
(r'.', Text),
],
# attributes take the form { key1 = value1 key2 = value2 ... }
'xsdattributes': [
(r'[^ =}]', Name.Attribute),
(r'=', Operator),
(r'"[^"]*"', String.Double),
(r'\}', Punctuation, '#pop'),
(r'.', Text),
],
}
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