cdepillabout/pretty-simple

Printing of a fractional in scientific notation adds spaces

vcanadi opened this issue · 4 comments

vcanadi commented

e.g
pShowOpt defaultOutputOptionsNoColor (1e-2 :: Double)
results in "1.0 e- 2"
and not "1.0e-2"
The first one is not readable by default Read instance e.g.
read @Double $ unpack $ pShowOpt defaultOutputOptionsNoColor (1e-2 :: Double) *** Exception: Prelude.read: no parse

georgefst commented

Thanks. This is another instance of #75.

cdepillabout commented

I'll close this in favor of #75.

The first one is not readable by default Read instance

Being able to feed the output of pretty-simple into read was never a goal for pretty-simple.

What are you using this for?

I guess it could be somewhat useful, but I've never really thought about it. Up until now, I don't think anyone has ever requested this.

vcanadi commented

I have some amount of static data that is used for unit testing. I've pretty printed it so it is more readable in the *Spec.hs files. Basically, I just wanted json-like line breaks of the data instead of just one single line string you have from Show.

cdepillabout commented

@vcanadi There are other pretty-printing libraries in Haskell, a lot of them require a data type to have a valid Show instance (and don't print in color by default), so it might make more sense for you to use one of them.

For instance, https://hackage.haskell.org/package/pretty-show might be a better fit for you.

A couple other links you might be interested in:

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