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example.html
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example.html
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<!DOCTYPE html>
<style>
body {
background-color: hsl(30,20%, 95%);
}
h1 {
font-family: sans-serif;
font-size: 1em;
}
script {
display: block;
white-space: pre;
margin-top: -1em;
}
</style>
<link rel='stylesheet' href='railroad-diagrams.css'>
<script src='railroad-diagrams.js'></script>
<body>
<!--
<h1 id=test>TEST</h1>
<script>
Diagram(
Choice(1, "above", AlternatingSequence(Stack("foo", "foo"), Stack("bar", "bar")), "below")).addTo();
</script>
-->
<h1 id='ident'>IDENT</h1>
<script>
ComplexDiagram(
Choice(0, Skip(), '-'),
Choice(0, NonTerminal('name-start char'), NonTerminal('escape')),
ZeroOrMore(
Choice(0, NonTerminal('name char'), NonTerminal('escape')))).addTo();
</script>
<h1 id='function'>FUNCTION</h1>
<script>
Diagram(NonTerminal('IDENT'), '(').addTo();
</script>
<h1 id='at-keyword'>AT-KEYWORD</h1>
<script>
Diagram('@', NonTerminal('IDENT')).addTo();
</script>
<h1 id='hash'>HASH</h1>
<script>
Diagram('#', NonTerminal('IDENT')).addTo();
</script>
<h1 id='string'>STRING</h1>
<script>
Diagram(
Choice(0,
Sequence(
'"',
ZeroOrMore(
Choice(0,
NonTerminal('not " or \\'),
NonTerminal('escape'))),
'"'),
Sequence(
"'",
ZeroOrMore(
Choice(0,
NonTerminal("not ' or \\"),
NonTerminal('escape'))),
"'"))).addTo();
</script>
<h1 id='url'>URL</h1>
<script>
Diagram(
Choice(0, 'u', 'U'),
Choice(0, 'r', 'R'),
Choice(0, 'l', 'L'),
'(',
Choice(1,
Optional(NonTerminal('WS')),
Sequence(
Optional(NonTerminal('WS')),
NonTerminal('STRING', '#string'),
Optional(NonTerminal('WS'))),
Sequence(
Optional(NonTerminal('WS')),
OneOrMore(
Choice(0,
NonTerminal('not " \' ( ) WS or NPC'),
NonTerminal('escape'))),
Optional(NonTerminal('WS')))),
')').addTo();
</script>
<h1 id="number">NUMBER</h1>
<script>
Diagram(
Choice(1, '+', Skip(), '-'),
Choice(0,
Sequence(
OneOrMore(NonTerminal('digit')),
'.',
OneOrMore(NonTerminal('digit'))),
OneOrMore(NonTerminal('digit')),
Sequence(
'.',
OneOrMore(NonTerminal('digit')))),
Choice(0,
Skip(),
Sequence(
Choice(0, 'e', 'E'),
Choice(1, '+', Skip(), '-'),
OneOrMore(NonTerminal('digit'))))).addTo();
</script>
<h1>DIMENSION</h1>
<script>
Diagram(NonTerminal('NUMBER', '#number'), NonTerminal('IDENT')).addTo();
</script>
<h1>PERCENTAGE</h1>
<script>
Diagram(NonTerminal('NUMBER', '#number'), '%').addTo();
</script>
<h1>UNICODE-RANGE</h1>
<script>
Diagram(
Choice(0,
'U',
'u'),
'+',
Choice(0,
Sequence(OneOrMore(NonTerminal('hex digit'), Comment('1-6 times'))),
Sequence(
ZeroOrMore(NonTerminal('hex digit'), Comment('1-5 times')),
OneOrMore('?', Comment('1 to (6 - digits) times'))),
Sequence(
OneOrMore(NonTerminal('hex digit'), Comment('1-6 times')),
'-',
OneOrMore(NonTerminal('hex digit'), Comment('1-6 times'))))).addTo();
</script>
<h1>COMMENT</h1>
<script>
Diagram(
'/*',
ZeroOrMore(
NonTerminal("anything but * followed by /")),
'*/').addTo();
</script>
<h1>CDO</h1>
<script>
Diagram("<" + "!--").addTo();
</script>
<h1>CDC</h1>
<script>
Diagram("-->").addTo();
</script>
<h1 id='SQL'>SQL</h1>
<script>
Diagram(
Stack(
Sequence(
'SELECT',
Optional('DISTINCT', 'skip'),
Choice(0,
'*',
OneOrMore(
Sequence(NonTerminal('expression'), Optional(Sequence('AS', NonTerminal('output_name')))),
','
)
),
'FROM',
OneOrMore(NonTerminal('from_item'), ','),
Optional(Sequence('WHERE', NonTerminal('condition')))
),
Sequence(
Optional(Sequence('GROUP BY', NonTerminal('expression'))),
Optional(Sequence('HAVING', NonTerminal('condition'))),
Optional(Sequence(
Choice(0, 'UNION', 'INTERSECT', 'EXCEPT'),
Optional('ALL'),
NonTerminal('select')
))
),
Sequence(
Optional(Sequence(
'ORDER BY',
OneOrMore(Sequence(NonTerminal('expression'), Choice(0, Skip(), 'ASC', 'DESC')), ','))
),
Optional(Sequence(
'LIMIT',
Choice(0, NonTerminal('count'), 'ALL')
)),
Optional(Sequence('OFFSET', NonTerminal('start'), Optional('ROWS')))
)
)
).addTo();
</script>
<h1 id='image-func'>image() function</h1>
<xmp>
image() = image( <image-tags>? [ <image-src>? , <color>? ]! )
<image-tags> = [ ltr | rtl ]
<image-src> = [ <url> | <string> ]</xmp>
<script>
Diagram(
Optional(
Sequence(
Choice(0, "ltr", "rtl")
)
),
OptionalSequence(
Choice(0, NonTerminal("<url>"), NonTerminal("<string>")),
NonTerminal("<color>")
)
).addTo();
</script>
<h1 id='glob'>glob pattern</h1>
Alternating alphanums and <code>*</code> chars
<script>
Diagram(
AlternatingSequence(
OneOrMore(NonTerminal("alphanumeric")),
"*"
)
).addTo();
</script>
<h1 id='grid-auto-flow'>CSS grid-auto-flow property</h1>
<script>
Diagram(
MultipleChoice(0, "any",
Choice(1, "row", "column"),
"dense"
)
).addTo();
</script>