1 files changed, 0 insertions, 54 deletions
diff --git a/addon-sdk/source/lib/sdk/util/dispatcher.js b/addon-sdk/source/lib/sdk/util/dispatcher.js
deleted file mode 100644
index 67d29dfed..000000000
--- a/addon-sdk/source/lib/sdk/util/dispatcher.js
+++ /dev/null
@@ -1,54 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-module.metadata = {
-  "stability": "experimental"
-};
-
-const method = require("method/core");
-
-// Utility function that is just an enhancement over `method` to
-// allow predicate based dispatch in addition to polymorphic
-// dispatch. Unfortunately polymorphic dispatch does not quite
-// cuts it in the world of XPCOM where no types / classes exist
-// and all the XUL nodes share same type / prototype.
-// Probably this is more generic and belongs some place else, but
-// we can move it later once this will be relevant.
-var dispatcher = hint => {
-  const base = method(hint);
-  // Make a map for storing predicate, implementation mappings.
-  let implementations = new Map();
-
-  // Dispatcher function goes through `predicate, implementation`
-  // pairs to find predicate that matches first argument and
-  // returns application of arguments on the associated
-  // `implementation`. If no matching predicate is found delegates
-  // to a `base` polymorphic function.
-  let dispatch = (value, ...rest) => {
-    for (let [predicate, implementation] of implementations) {
-      if (predicate(value))
-        return implementation(value, ...rest);
-    }
-
-    return base(value, ...rest);
-  };
-
-  // Expose base API.
-  dispatch.define = base.define;
-  dispatch.implement = base.implement;
-  dispatch.toString = base.toString;
-
-  // Add a `when` function to allow extending function via
-  // predicates.
-  dispatch.when = (predicate, implementation) => {
-    if (implementations.has(predicate))
-      throw TypeError("Already implemented for the given predicate");
-    implementations.set(predicate, implementation);
-  };
-
-  return dispatch;
-};
-
-exports.dispatcher = dispatcher;