Re: [ghc-steering-committee] #344: Negative Literals Improved, rec: accept

Hello, I understand the problem, but let me make sure I understand the solution, as the proposal is rather terse and refers to the other proposal, that introduces the exotic lexing scheme. So am I right in understanding that `f-1` will lex as `f - 1`, but `f -1` will lext as `f (-1)`? The reason this would work like that is because the "white space" token before the `-` is not "closing" and so we know to parse a negative literal. Just as a note, I never quite understood how we plan to implement #229---is it supposed to be done through state in the lexer, or do we have a simple lexer that keeps all tokens, including white space, and then write a post-processing function to glue and rejigger tokens? -Iavor On Wed, Jul 15, 2020 at 9:05 AM Spiwack, Arnaud wrote:

I've got no strong opinion. But it does sound reasonable to me.

Maybe this should also be a signal to deprecate NegativeLiterals in favour of LexicalNegation.

On Wed, Jul 15, 2020 at 11:16 AM Alejandro Serrano Mena wrote:

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+1

This has traditionally been a pain point for Haskell newcomers, so any fix is welcome.

El El mié, 15 jul 2020 a las 11:07, Richard Eisenberg escribió:

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On Jul 15, 2020, at 8:58 AM, Joachim Breitner wrote:

I suggest we accept that proposal.

+1

Yes, let's accept -- and if we act quickly, it can be so for 8.12.

Thanks, Richard _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

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