proposal-pipeline-operator

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Grammar rules in proposed spec text seem incomplete

2

Based on the description in README.md, it seems that the pipeline operator is intended to be left-associative: `a |> b |> c` is equivalent to `(a |> b) |> c`....

sethbrenith

Use @ instead of % as % is already an operator

3

Since `%` is the modulus operator I think it we be better to use a different symbol, perhaps `@` ```js let even = 8 |> @ % 2 === 0;...

Mike96Angelo

Function composition models pipelines

1

Let's start with the standard F# pipeline as implemented by Babel: ```js const a = x |> f(?, 1) |> g |> h ``` This gives you `a` where `x`,...

mlanza

Implementing pipeline operator as a syntax transformer

7

I recently had a brainstorm for a TC39 proposal, and if it's not too much trouble I'd like to know if the Pipeline champions think, as I do, that it...

dmchurch

Playground for bikeshedding the topic token?

1

The Record & Tuple proposal have used a playground page to make their proposal playable in the browser. As I understand things, their playground transpiles users' script to currently supported...

bogdanbiv

Adding to my previous real-world examples in #314 for constructors and factory methods, here's another pattern that I'm seeing a lot in our company's code: use of ternaries to handle...

justingrant

Real-world examples of better DX for constructors and factory APIs like `Object.fromEntries`

6

> more empiric evidence for pipe’s impact would be good. (from https://github.com/tc39/proposal-pipeline-operator/issues/232#issuecomment-2784879225) Thanks so much for persevering with this proposal. Here's 8 snippets (I could probably provide hundreds more) from...

justingrant

Deeply nested expressions A(B(C(D(E(…), …), …), …), …) vs. temp variables

29

Unrelated @tabatkins promised to get on with it back in August 2024 - https://github.com/tc39/proposal-pipeline-operator/issues/306 Well, it's April 2025 already, and I'm churning a lot of typescript nowadays, littered with A(B(C(D(E(param)))))....

WillAvudim

This is a spinoff of https://github.com/tc39/proposal-pipeline-operator/issues/311#issuecomment-2788293430 and #159. * In many contexts, such as query building, pipes oftentimes may need to do repetitive computations or queries. These contexts include: *...

js-choi

Consider mentioning fluent API tree-shakability as a technical motivation

11

In “ Implementation of a modular schema library in TypeScript with focus on bundle size and performance” (2003; see https://valibot.dev/thesis.pdf), Fabian Hiller presented valibot as an alternative to preexisting validation...

TzviPM