184 lines
4.9 KiB
Plaintext
184 lines
4.9 KiB
Plaintext
"This is a polyglot Python/JavaScript file.";
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add('comment', Diagram(
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'/*',
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ZeroOrMore(
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NonTerminal('anything but * followed by /')),
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'*/'));
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add('newline', Diagram(Choice(0, '\\n', '\\r\\n', '\\r', '\\f')));
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add('whitespace', Diagram(Choice(
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0, 'space', '\\t', NonTerminal('newline'))));
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add('hex digit', Diagram(NonTerminal('0-9 a-f or A-F')));
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add('escape', Diagram(
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'\\', Choice(0,
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NonTerminal('not newline or hex digit'),
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Sequence(
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OneOrMore(NonTerminal('hex digit'), Comment('1-6 times')),
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Optional(NonTerminal('whitespace'), 'skip')))));
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add('<whitespace-token>', Diagram(OneOrMore(NonTerminal('whitespace'))));
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add('ws*', Diagram(ZeroOrMore(NonTerminal('<whitespace-token>'))));
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add('<ident-token>', Diagram(
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Choice(0, Skip(), '-'),
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Choice(0, NonTerminal('a-z A-Z _ or non-ASCII'), NonTerminal('escape')),
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ZeroOrMore(Choice(0,
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NonTerminal('a-z A-Z 0-9 _ - or non-ASCII'), NonTerminal('escape')))));
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add('<function-token>', Diagram(
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NonTerminal('<ident-token>'), '('));
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add('<at-keyword-token>', Diagram(
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'@', NonTerminal('<ident-token>')));
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add('<hash-token>', Diagram(
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'#', OneOrMore(Choice(0,
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NonTerminal('a-z A-Z 0-9 _ - or non-ASCII'),
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NonTerminal('escape')))));
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add('<string-token>', Diagram(
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Choice(0,
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Sequence(
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'"',
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ZeroOrMore(
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Choice(0,
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NonTerminal('not " \\ or newline'),
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NonTerminal('escape'),
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Sequence('\\', NonTerminal('newline')))),
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'"'),
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Sequence(
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'\'',
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ZeroOrMore(
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Choice(0,
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NonTerminal("not ' \\ or newline"),
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NonTerminal('escape'),
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Sequence('\\', NonTerminal('newline')))),
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'\''))));
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add('<url-token>', Diagram(
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NonTerminal('<ident-token "url">'),
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'(',
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NonTerminal('ws*'),
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Optional(Sequence(
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Choice(0, NonTerminal('url-unquoted'), NonTerminal('STRING')),
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NonTerminal('ws*'))),
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')'));
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add('url-unquoted', Diagram(OneOrMore(
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Choice(0,
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NonTerminal('not " \' ( ) \\ whitespace or non-printable'),
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NonTerminal('escape')))));
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add('<number-token>', Diagram(
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Choice(1, '+', Skip(), '-'),
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Choice(0,
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Sequence(
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OneOrMore(NonTerminal('digit')),
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'.',
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OneOrMore(NonTerminal('digit'))),
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OneOrMore(NonTerminal('digit')),
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Sequence(
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'.',
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OneOrMore(NonTerminal('digit')))),
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Choice(0,
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Skip(),
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Sequence(
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Choice(0, 'e', 'E'),
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Choice(1, '+', Skip(), '-'),
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OneOrMore(NonTerminal('digit'))))));
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add('<dimension-token>', Diagram(
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NonTerminal('<number-token>'), NonTerminal('<ident-token>')));
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add('<percentage-token>', Diagram(
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NonTerminal('<number-token>'), '%'));
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add('<unicode-range-token>', Diagram(
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Choice(0,
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'U',
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'u'),
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'+',
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Choice(0,
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Sequence(OneOrMore(NonTerminal('hex digit'), Comment('1-6 times'))),
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Sequence(
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ZeroOrMore(NonTerminal('hex digit'), Comment('1-5 times')),
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OneOrMore('?', Comment('1 to (6 - digits) times'))),
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Sequence(
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OneOrMore(NonTerminal('hex digit'), Comment('1-6 times')),
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'-',
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OneOrMore(NonTerminal('hex digit'), Comment('1-6 times'))))));
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add('<include-match-token>', Diagram('~='));
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add('<dash-match-token>', Diagram('|='));
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add('<prefix-match-token>', Diagram('^='));
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add('<suffix-match-token>', Diagram('$='));
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add('<substring-match-token>', Diagram('*='));
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add('<column-token>', Diagram('||'));
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add('<CDO-token>', Diagram('<' + '!--'));
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add('<CDC-token>', Diagram('-' + '->'));
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NonTerminal = NonTerminal;
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add('Stylesheet', Diagram(ZeroOrMore(Choice(3,
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NonTerminal('<CDO-token>'), NonTerminal('<CDC-token>'), NonTerminal('<whitespace-token>'),
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NonTerminal('Qualified rule'), NonTerminal('At-rule')))));
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add('Rule list', Diagram(ZeroOrMore(Choice(1,
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NonTerminal('<whitespace-token>'), NonTerminal('Qualified rule'), NonTerminal('At-rule')))));
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add('At-rule', Diagram(
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NonTerminal('<at-keyword-token>'), ZeroOrMore(NonTerminal('Component value')),
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Choice(0, NonTerminal('{} block'), ';')));
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add('Qualified rule', Diagram(
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ZeroOrMore(NonTerminal('Component value')),
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NonTerminal('{} block')));
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add('Declaration list', Diagram(
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NonTerminal('ws*'),
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Choice(0,
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Sequence(
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Optional(NonTerminal('Declaration')),
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Optional(Sequence(';', NonTerminal('Declaration list')))),
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Sequence(
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NonTerminal('At-rule'),
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NonTerminal('Declaration list')))));
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add('Declaration', Diagram(
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NonTerminal('<ident-token>'), NonTerminal('ws*'), ':',
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ZeroOrMore(NonTerminal('Component value')), Optional(NonTerminal('!important'))));
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add('!important', Diagram(
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'!', NonTerminal('ws*'), NonTerminal('<ident-token "important">'), NonTerminal('ws*')));
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add('Component value', Diagram(Choice(0,
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NonTerminal('Preserved token'),
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NonTerminal('{} block'),
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NonTerminal('() block'),
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NonTerminal('[] block'),
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NonTerminal('Function block'))));
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add('{} block', Diagram('{', ZeroOrMore(NonTerminal('Component value')), '}'));
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add('() block', Diagram('(', ZeroOrMore(NonTerminal('Component value')), ')'));
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add('[] block', Diagram('[', ZeroOrMore(NonTerminal('Component value')), ']'));
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add('Function block', Diagram(
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NonTerminal('<function-token>'),
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ZeroOrMore(NonTerminal('Component value')),
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')'));
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