[ghc-steering-committee] #686: Amendment to MultilineStrings, recommendation: accept

[Simon Peyton Jones]

I support the proposal; I have asked some technical questions on the Github
thread.

Simon

On Wed, 19 Mar 2025 at 21:44, Malte Ott <malte.ott at maralorn.de> wrote:

> Dear committee,
>
> in
>
> https://github.com/ghc-proposals/ghc-proposals/pull/686
>
> Brandon Chinn proposes to slightly modify the recently accepted
> MultilineStrings
> proposal:
>
> "For the calculation of whitespace prefix removal string gaps (i.e. the /
>  /
> syntax) should be regarded as non-whitespace."
>
> This is technically a breaking change so we should deliberate on it, but I
> don’t see
> why anyone would come into this situation in the first place, so I don’t
> think
> we should dwell on this.
>
> A motivation for the change is that it is easier to implement. I am torn
> whether
> it is more or less surprising to users, with maybe a small tendency to less
> surprising, so I recommend we go with it.
>
> The committee could decide to be annoying about this. This is a not
> strongly
> motivated change which theoretically changes the semantics of a released
> extension without warnings or compile errors.
>
> However, the extension would surely count as experimental if we were
> already using the
> classification we agreed upon. And this tiny change has already been merged
> as part of a bug fix and I think we should let this pass out of respect to
> our
> implementors.
>
> Please voice your opinions, I aim to declare this proposal accepted in 7
> days.
>
> Best
> Malte
>
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