1 files changed, 84 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js b/tools/eslint/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js
new file mode 100644
index 0000000000..07ef5218ed
--- /dev/null
+++ b/tools/eslint/node_modules/js-yaml/lib/js-yaml/type/js/regexp.js
@@ -0,0 +1,84 @@
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptRegExp(data) {
+  if (null === data) {
+    return false;
+  }
+
+  if (0 === data.length) {
+    return false;
+  }
+
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // if regexp starts with '/' it can have modifiers and must be properly closed
+  // `/foo/gim` - modifiers tail can be maximum 3 chars
+  if ('/' === regexp[0]) {
+    if (tail) {
+      modifiers = tail[1];
+    }
+
+    if (modifiers.length > 3) { return false; }
+    // if expression starts with /, is should be properly terminated
+    if (regexp[regexp.length - modifiers.length - 1] !== '/') { return false; }
+
+    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
+  }
+
+  try {
+    var dummy = new RegExp(regexp, modifiers);
+    return true;
+  } catch (error) {
+    return false;
+  }
+}
+
+function constructJavascriptRegExp(data) {
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // `/foo/gim` - tail can be maximum 4 chars
+  if ('/' === regexp[0]) {
+    if (tail) {
+      modifiers = tail[1];
+    }
+    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
+  }
+
+  return new RegExp(regexp, modifiers);
+}
+
+function representJavascriptRegExp(object /*, style*/) {
+  var result = '/' + object.source + '/';
+
+  if (object.global) {
+    result += 'g';
+  }
+
+  if (object.multiline) {
+    result += 'm';
+  }
+
+  if (object.ignoreCase) {
+    result += 'i';
+  }
+
+  return result;
+}
+
+function isRegExp(object) {
+  return '[object RegExp]' === Object.prototype.toString.call(object);
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/regexp', {
+  kind: 'scalar',
+  resolve: resolveJavascriptRegExp,
+  construct: constructJavascriptRegExp,
+  predicate: isRegExp,
+  represent: representJavascriptRegExp
+});