//// [iterableArrayPattern15.ts] function fun(...[a, b]: Bar[]) { } fun(...new FooIterator); class Bar { x } class Foo extends Bar { y } class FooIterator { next() { return { value: new Foo, done: false }; } [Symbol.iterator]() { return this; } } //// [iterableArrayPattern15.js] function fun(...[a, b]) { } fun(...new FooIterator); class Bar { } class Foo extends Bar { } class FooIterator { next() { return { value: new Foo, done: false }; } [Symbol.iterator]() { return this; } }