WIP - add extractor, generate snippet_data

node_modules/regexp-tree/dist/compat-transpiler/index.js

@@ -0,0 +1,50 @@
+/**
+ * The MIT License (MIT)
+ * Copyright (c) 2017-present Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
+ */
+
+'use strict';
+
+var compatTransforms = require('./transforms');
+var _transform = require('../transform');
+
+module.exports = {
+  /**
+   * Translates a regexp in new syntax to equivalent regexp in old syntax.
+   *
+   * @param string|RegExp|AST - regexp
+   * @param Array transformsWhitelist - names of the transforms to apply
+   */
+  transform: function transform(regexp) {
+    var transformsWhitelist = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+
+    var transformToApply = transformsWhitelist.length > 0 ? transformsWhitelist : Object.keys(compatTransforms);
+
+    var result = void 0;
+
+    // Collect extra data per transform.
+    var extra = {};
+
+    transformToApply.forEach(function (transformName) {
+
+      if (!compatTransforms.hasOwnProperty(transformName)) {
+        throw new Error('Unknown compat-transform: ' + transformName + '. ' + 'Available transforms are: ' + Object.keys(compatTransforms).join(', '));
+      }
+
+      var handler = compatTransforms[transformName];
+
+      result = _transform.transform(regexp, handler);
+      regexp = result.getAST();
+
+      // Collect `extra` transform result.
+      if (typeof handler.getExtra === 'function') {
+        extra[transformName] = handler.getExtra();
+      }
+    });
+
+    // Set the final extras for all transforms.
+    result.setExtra(extra);
+
+    return result;
+  }
+};