proposal-explicit-resource-management VS proposal-do-expressions

The standard doesn't have anything to do with TypeScript, not sure where you got that from? https://github.com/tc39/proposal-explicit-resource-managemen...

The explicit resource management proposal tries to make it a bit easier for us, by allowing the resource to declare how it should be managed, rather than expecting us to clean everything up when we use the resource. We get a new keyword using to define a variable (rather than const or let), which tells the runtime to clean up the resource at the end of the function.

Enter the explicit resource management proposal, which describes — among many other things — a new using operator that was introduced in TypeScript 5.2 and is making its way into JavaScript. From the top of the README file, here’s what this proposal aims to do:

In addition to this, is the new (stage 3 even!)explicit resource management proposal[0], supported by TypeScript version >= 5.2[1]

Though I agree that async context is better fit for this generally, the RMP should be good for telemetry around objects that have defined lifetime semantics, which is a step in the right direction you can use today

[0]: https://github.com/tc39/proposal-explicit-resource-managemen...

[1]: https://www.totaltypescript.com/typescript-5-2-new-keyword-u...

It's too early for that, https://github.com/tc39/proposal-explicit-resource-management

[3]: https://github.com/tc39/proposal-explicit-resource-managemen...

I'm not _entirely_ sure which RAII you mean, but if you mean something like C#'s `using` or Java's `try-with-resources` or Python's `with`, then https://github.com/tc39/proposal-explicit-resource-managemen... and https://github.com/tc39/proposal-async-explicit-resource-man... are in stage 3 (of 4 stages) in ECMAScript's language proposal lifecycle and will be coming to a JS engine near you behind a flag soon-ish.

> no pattern matching/switch expressions

They're still waiting on the do expression proposal for that (https://github.com/tc39/proposal-do-expressions), which has been in the bikeshedding stage for the past five years.

At some point, it may be superseded by do blocks, but for now it's really your best bet.

But there is a proposal for do-expression : https://github.com/tc39/proposal-do-expressions

It's also the reason why do expressions are my most anticipated feature for JS.

> They should repurpose `do` so that `do {}` (without the `while`) is an expression that you can put statements inside and return the last statement.

There's a proposal for precisely that. Unfortunately, only Stage 1 though.

https://github.com/tc39/proposal-do-expressions

It's one of the main reasons why I really want the do-expression propsal to work out, because then it would become:

Do blocks. Okay, this is actually a proposal so maybe someday. Basically blocks that can resolve to an expression.

Tomorrow, do expressions: