destructuring private fields with array pattern / object patte… (#10017)

* destructuring private fields with array pattern / object pattern

* wip: new test cases

* destrucuring and rest for private properties

* test case for loose private-loose

* add transform-desturcturing for exec

* update test case

* remove getPrototypeOf imports from get and set

* wip: destructure super assignment

* throw "Destructuring to a super field is not supported yet."

* fix tests and fix assignment pattern

* remove CallExpression from AssignmentPattern

packages/babel-plugin-proposal-class-properties/test/fixtures/private/destructuring-array-pattern/exec.js

@@ -0,0 +1,14 @@
+class Foo {
+  #client
+
+  constructor(props) {
+    ;([this.#client] = props);
+  }
+
+  getClient() {
+    return this.#client;
+  }
+}
+
+const foo = new Foo(['bar']);
+expect(foo.getClient()).toBe('bar');

packages/babel-plugin-proposal-class-properties/test/fixtures/private/destructuring-array-pattern/input.js

@@ -0,0 +1,7 @@
+class Foo {
+  #client
+
+  constructor(props) {
+    ([this.#client] = props);
+  }
+}

packages/babel-plugin-proposal-class-properties/test/fixtures/private/destructuring-array-pattern/output.js

@@ -0,0 +1,14 @@
+var Foo = function Foo(props) {
+  "use strict";
+
+  babelHelpers.classCallCheck(this, Foo);
+
+  _client.set(this, {
+    writable: true,
+    value: void 0
+  });
+
+  [babelHelpers.classPrivateFieldDestructureSet(this, _client).value] = props;
+};
+
+var _client = new WeakMap();