Hi, Am Donnerstag, den 12.12.2019, 12:30 +0000 schrieb Richard Eisenberg:
I would also like to propose
(C). Syntax error.
That is, a tight-infix use of `.` does not associate with a function application on its left. A prefix occurrence of `.` would: `f x .y` would be `(f x) .y`.
We could also just make this a warning.
such a warning was actually also proposed in the monster GitHub thread: https://github.com/ghc-proposals/ghc-proposals/pull/282#issuecomment-5645975... as -Wproximity, which could warn about any misleading spacing, so not only `f x.y` (whether this is a record access or function composition), but also `x * y+z` etc. Sounds very nice! Probably orthogonal to this proposal, but maybe a way to make people worry less about the confusion that `f x.y` may bring? Cheers, Joachim -- Joachim Breitner mail@joachim-breitner.de http://www.joachim-breitner.de/