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

[Joachim Breitner]

Hi,

I guess someone needs to respond here :-)

Am Mittwoch, den 15.07.2020, 09:37 -0700 schrieb Iavor Diatchki:
> 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. 

That is my understanding. Does that affect your verdict here?

> 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?

No idea here.

Cheers,
Joachim
-- 
Joachim Breitner
  mail at joachim-breitner.de
  http://www.joachim-breitner.de/