69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
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// https://smlfamily.github.io/sml97-defn.pdf
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// https://people.mpi-sws.org/~rossberg/sml.html
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(function (Prism) {
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var keywords = /\b(?:abstype|and|andalso|as|case|datatype|do|else|end|eqtype|exception|fn|fun|functor|handle|if|in|include|infix|infixr|let|local|nonfix|of|op|open|orelse|raise|rec|sharing|sig|signature|struct|structure|then|type|val|where|while|with|withtype)\b/i;
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Prism.languages.sml = {
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// allow one level of nesting
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'comment': /\(\*(?:[^*(]|\*(?!\))|\((?!\*)|\(\*(?:[^*(]|\*(?!\))|\((?!\*))*\*\))*\*\)/,
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'string': {
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pattern: /#?"(?:[^"\\]|\\.)*"/,
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greedy: true
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},
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'class-name': [
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{
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// This is only an approximation since the real grammar is context-free
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//
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// Why the main loop so complex?
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// The main loop is approximately the same as /(?:\s*(?:[*,]|->)\s*<TERMINAL>)*/ which is, obviously, a lot
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// simpler. The difference is that if a comma is the last iteration of the loop, then the terminal must be
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// followed by a long identifier.
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pattern: RegExp(
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/((?:^|[^:]):\s*)<TERMINAL>(?:\s*(?:(?:\*|->)\s*<TERMINAL>|,\s*<TERMINAL>(?:(?=<NOT-LAST>)|(?!<NOT-LAST>)\s+<LONG-ID>)))*/.source
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.replace(/<NOT-LAST>/g, function () { return /\s*(?:[*,]|->)/.source; })
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.replace(/<TERMINAL>/g, function () {
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return /(?:'[\w']*|<LONG-ID>|\((?:[^()]|\([^()]*\))*\)|\{(?:[^{}]|\{[^{}]*\})*\})(?:\s+<LONG-ID>)*/.source;
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})
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.replace(/<LONG-ID>/g, function () { return /(?!<KEYWORD>)[a-z\d_][\w'.]*/.source; })
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.replace(/<KEYWORD>/g, function () { return keywords.source; }),
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'i'
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),
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lookbehind: true,
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greedy: true,
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inside: null // see below
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},
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{
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pattern: /((?:^|[^\w'])(?:datatype|exception|functor|signature|structure|type)\s+)[a-z_][\w'.]*/i,
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lookbehind: true
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}
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],
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'function': {
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pattern: /((?:^|[^\w'])fun\s+)[a-z_][\w'.]*/i,
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lookbehind: true
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},
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'keyword': keywords,
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'variable': {
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pattern: /(^|[^\w'])'[\w']*/,
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lookbehind: true,
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},
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'number': /~?\b(?:\d+(?:\.\d+)?(?:e~?\d+)?|0x[\da-f]+)\b/i,
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'word': {
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pattern: /\b0w(?:\d+|x[\da-f]+)\b/i,
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alias: 'constant'
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},
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'boolean': /\b(?:false|true)\b/i,
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'operator': /\.\.\.|:[>=:]|=>?|->|[<>]=?|[!+\-*/^#|@~]/,
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'punctuation': /[(){}\[\].:,;]/
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};
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Prism.languages.sml['class-name'][0].inside = Prism.languages.sml;
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Prism.languages.smlnj = Prism.languages.sml;
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}(Prism));
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