Add experimental support for ES7 function bind. (issue #1287)

test/core/fixtures/transformation/es7.function-bind/bind/actual.js

@@ -0,0 +1,2 @@
+var f = ctx::ns.obj.func;
+var g = ::ns.obj.func;

test/core/fixtures/transformation/es7.function-bind/bind/expected.js

@@ -0,0 +1,6 @@
+"use strict";
+
+var _context;
+
+var f = ns.obj.func.bind(ctx);
+var g = (_context = ns.obj).func.bind(_context);

test/core/fixtures/transformation/es7.function-bind/call/actual.js

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+ctx::ns.obj.func();
+::ns.obj.func();
+
+ns.obj2::ns.obj1.func();

test/core/fixtures/transformation/es7.function-bind/call/expected.js

@@ -0,0 +1,8 @@
+"use strict";
+
+var _context;
+
+ns.obj.func.call(ctx);
+(_context = ns.obj).func.call(_context);
+
+ns.obj1.func.call(ns.obj2);

test/core/fixtures/transformation/es7.function-bind/complex-call/actual.js

@@ -0,0 +1,6 @@
+import { map, takeWhile, forEach } from "iterlib";
+
+getPlayers()
+::map(x => x.character())
+::takeWhile(x => x.strength > 100)
+::forEach(x => console.log(x));

test/core/fixtures/transformation/es7.function-bind/complex-call/expected.js

@@ -0,0 +1,11 @@
+"use strict";
+
+var _iterlib = require("iterlib");
+
+_iterlib.forEach.call(_iterlib.takeWhile.call(_iterlib.map.call(getPlayers(), function (x) {
+  return x.character();
+}), function (x) {
+  return x.strength > 100;
+}), function (x) {
+  return console.log(x);
+});

test/core/fixtures/transformation/es7.function-bind/options.json

@@ -0,0 +1,3 @@
+{
+  "optional": "es7.functionBind"
+}