.await syntax

[san127127]

The current await syntax is not convenient when we want to chain the methods. For example,

(await GetSomeDataAsync()).DoSomething()
// Even worse when those methods are all async
await (await (await GetSomeDataAsync()).DoSomethingAsync())).DoSomethingElseAsync()

Maybe we can have something similar to rust lang's .await syntax, which is much clearer:

GetSomeDataAsync()
.await
.DoSomethingAsync()
.await
DoSomethingElseAsync()
.await

[canton7]

See:

• The discussion in Champion "Null-conditional await" #35
• async deference operator #1117

Another advantage is that this nicely supports a null-conditional await: GetSomeDataAsync()?.await. The disadvantage is that we now have two syntaxes which do exactly the same thing.

[HaloFour]

On request by a member of the design team I opened up this proposal which more or less mirrors your request: #4076