await all promises in a code block

[lentschi]

Ah, sorry, this is more or less a duplicate of this (Looked for it, but couldn't find it yesterday):

Concurrent Async and Normal Await Evaluation Blocks

Summary With promises, concurrency is already trivial to implement, but not in a syntactically clear way. I propose async/await blocks to alleviate this ergonomic disincentive. Motivation If we have a variable dependency graph for d(a, b, c.property): a b c | | | | | (c => c.property) \ | / d We can implement it intuitively like this: const a = getA() const b = getB() const c = getC() d(a, b, c.property) But what about when a, b, and c are promises? It could be translated directly fr…