Adding an operator like Haskell's '$'

[Ekleog]

The title says it all, I'm thinking it would be useful for eg.

builtins.trace "my debug stuff" $
# some multiline complex code that would require parenthesing otherwise

What do you think about it? I guess it's too late for the feature freeze, but $ being already reserved for ${} I guess it wouldn't be a breaking change anyway.

[dtzWill]

This would be crazy useful for exactly the use case described here, I run into this often! 😁

[lheckemann]

Also for (import <nixpkgs> {}).callPackage $!

[Ekleog]

Also for builtins.seq.

[lilyball]

I really want this operator. And in particular, the right-hand side should support functions, because that's really what I want this for. I want to be able to take an existing

{ foo, bar }:
…

and change it to

lib.makeOverridable $
{ foo, bar }:
…

[lilyball]

Keywords to improve search discoverability of this issue: infix application operator

[lilyball]

On a similar note I'd also like the composition operator (.), though I find its lack less annoying than the lack of the application operator.

[stale]

I marked this as stale due to inactivity. → More info

[lheckemann]

We still want this!