On Thu, Jul 08, 2021 at 10:48:28PM +0300, Oleg Grenrus wrote:
GHC Manual: Using a custom interactive printing function [1]
Prelude Data.Char> "foo" "foo" Prelude Data.Char> let myprint=putStrLn . map toUpper . show Prelude Data.Char> :set -interactive-print myprint Prelude Data.Char> "foo" "FOO"
I remember some people using e.g. pretty-show or pretty-simple packages with great success.
No need to change anything in base, just make users aware of a configuration possibility.
This is NOT viable, not all escapes are valid to unescape after the fact in a print function. Which pieces of the `show` output are escaped unicode characters, and which are not depends on the original data type that got serialised to a given `String`. For example, in a `ByteString` the octet '\xFC' should display as '\252', while in a `String` or `Text` U+00FC should display as 'ü'. Thus, there is no correct unescape function for the string "M\\252ller", it could be "Müller", or not... -- Viktor.