Add ImportAttribute for import attributes (stage 3 Estree)

[aralroca]

Now that runtimes like Bun supports macros and the proposal is in stage 3 it would be nice to support import attributes.

https://github.com/tc39/proposal-import-attributes

Example in TypeScript:

[3cp]

Note for implementation

https://github.com/estree/estree/blob/master/stage3/import-attributes.md

EStree which meriyah implements has different definition of this syntax.

[3cp]

BTW I don't think the typescript screenshot is a correct reference :-)

The typescript parser thinks that's the legacy with statement, not part of the import declaration. You can see they appear as two sibling nodes in the syntax tree.

[aralroca]

@3cp thanks for the note, yes, the link to Estree is much more useful than the TypeScript image.

[aralroca]

It will be great to replace the TypeScript parser that I used in this plugin with Meriyah, which is much faster!

https://github.com/aralroca/prerender-macro

[3cp]

I cannot guarantee a time frame for this feature as I don't have enough bandwidth on open source projects right now. But I will put it on my TODO list :)

[3cp]

Bun has a native parser. Maybe you can talk to them to expose some APIs. It's probably not in extree syntax, but nothing beats Bun's performance.

the parser in Bun is a Zig port of esbuild's parser.

[aralroca]

Bun has a native parser. Maybe you can talk to them to expose some APIs. It's probably not in extree syntax, but nothing beats Bun's performance.

the parser in Bun is a Zig port of esbuild's parser.

Yes, I have discussed it several times on discord but I really don't know if they have plans to do it in the short term. Maybe @Jarred-Sumner can confirm

[aralroca]

@3cp Is there any news on this? 😊 if I can help in contributing I am open although I am not familiar with it.

[3cp]

Sorry I have not put on any effort. You are more than welcome to try.