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Prism.languages.prolog = {
// Syntax depends on the implementation
comment: {
pattern: /\/\*[\s\S]*?\*\/|%.*/,
greedy: true,
},
// Depending on the implementation, strings may allow escaped newlines and quote-escape
string: {
pattern: /(["'])(?:\1\1|\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1(?!\1)/,
greedy: true,
},
builtin: /\b(?:fx|fy|xf[xy]?|yfx?)\b/,
// FIXME: Should we list all null-ary predicates (not followed by a parenthesis) like halt, trace, etc.?
function: /\b[a-z]\w*(?:(?=\()|\/\d+)/,
number: /\b\d+(?:\.\d*)?/,
// Custom operators are allowed
operator: /[:\\=><\-?*@\/;+^|!$.]+|\b(?:is|mod|not|xor)\b/,
punctuation: /[(){}\[\],]/,
};
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