Thank-you guys for the excellent problems with the previous idea, to attempt to
fix as many of them as I can, here is an alteration to the proposal:
You have two types of functions, asynchronous and synchronous functions. To
distinguish between them, an asynchronous function has the keyword of `async`
prepended before it. Also, unlike the `return` statement in a synchronous
function, the asynchronous code has `async return`. Examples:
function someSync() { return "Sync"; } async function someAsync() {
setTimeout(() => { async return "Async"; }, 1000); }
The synchronous code is called as one would expect, however the asynchronous
code can be called in two ways:
function calleeOne() { let x = await someAsync(); } function calleeTwo() { let
x = someAsync(); }
You'll notice the main difference between this latest iteration and the first
proposal is that you do not need to put `async` around your callee function.
In the first case, the code waits until `x` has a value, here the value will be
"Async" after one second. In the second case, the code continues on instantly,
with `x` being an automatically wrapped promise. This has many advantages,
including the most obvious example given by Florian:
// Assumes a function `someAsync()` which is an asychronous function. function
c() { return d() } function d() { return await someAsync() }
You'll notice we've simply made `someAsync()` as a function, synchronous. No
code changes are needed above the `c()` function, unlike in the previous
proposal iteration.
I'll be interested to see what you guys consider the advantages/disadvantages
of this method, which I hope to be "the middle between two ends" on whether to
go fully into promises or fully into co-routines. Neither of which are in my
opinion the optimal stance.
On 26/02/2017 14:31:30, Florian Bösch <[email protected]> wrote:
await/async are de-facto co-routines. await/async will infect all code by
necessity of software engineering. At which point they're actual co-routines,
implemented badly, without a proper API.
On Sun, Feb 26, 2017 at 3:26 PM, Jerald Cohen <[email protected]
[mailto:[email protected]]> wrote:
Florian,
You sure you're not just adding more complexities to a language with features
that were _meant_ to remove such complexity?
Codefined's solution to me seems to be the one with the least amount of added
techniques in order to learn. Although I understand how co-rountines are
awesome, they can quickly get very confusing when you switch contexts.
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