[1] https://dvt.name/2018/06/02/spread-syntax-breaks-javascript/ (excuse the code formatting, one of my plugins broke)
A = 'hello world'
console.log( A ) // prints 'hello world'
console.log( (A) ) // also prints 'hello world'
A = ['hello', 'world']
console.log( ...A ) // prints 'hello world'
console.log( (...A) ) // SyntaxError: expected '=>' after argument list, got ')'
Engines might be able to improve the error message, but I can’t say I’ve ever run into that one.
const dotdotdot = <A>(f: Function) => (list: Array<A>) => f.apply(this, list)
dotdotdot(console.log)([10, 20, 30])
console.log(...[10, 20, 30])Really though it will come as a combination proposals - "interface types" being one of them