hexo/node_modules/prismjs/components/prism-sml.js

69 lines
2.4 KiB
JavaScript

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