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frontend/node_modules/refractor/lang/prolog.js

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+'use strict'
+
+module.exports = prolog
+prolog.displayName = 'prolog'
+prolog.aliases = []
+function prolog(Prism) {
+  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: /[(){}\[\],]/
+  }
+}