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gabejohnson avatar gabejohnson commented on June 12, 2024

It looks like the arguments to Droid aren't being enforested. It will work if you wrap the constructor call in parens:

let bb8 = (new Droid('BB-8', 'orange'));
console.log(bb8.beep());

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danielo515 avatar danielo515 commented on June 12, 2024

Hello @gabejohnson
Thanks for your answer.

Seems that you know how to workaround the possible problems that could emerge. Could you please help me building a very simple macro ? I just want to simulate the apply operator from haskell. So:

add $ 1 2
// becomes
add (1) (2)

I made several attempts, but none of them succeed compiling.
Regards

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gabejohnson avatar gabejohnson commented on June 12, 2024

@danielo515 You're going to need to use the operator keyword as outlined https://www.sweetjs.org/doc/tutorial#sweet-operators

This is what I came up with

operator $ right 0 = (left, right) =>
  #`
    ${left}(${right})
  `;

log $ 1; // log(1);

You're not going to be able to support something like log $ 1 2 though as the second argument to $ is an already fully expanded expression. log $ 1 $ 2 should work though.

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vendethiel avatar vendethiel commented on June 12, 2024

@gabejohnson "space" does not play in precedence resolution, right?

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gabejohnson avatar gabejohnson commented on June 12, 2024

@vendethiel not certain what you mean, but the space b/w 1 2 should just result in a syntax error. But sweet resolves it by putting 2 in a separate statement.

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danielo515 avatar danielo515 commented on June 12, 2024

Hello @gabejohnson ,
That's something I tried already. Since writing one dollar sing instead of two parents is less typing, the final result will be equally ugly.
This seems to be a great challenge for everything I tried so far: babel-macros, livescript, babel plugins, sweet....

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