Do you think 'read' (actually,
'readsPrec'?) could be made to also
read the international convention
(ie., read "1,5" would also work
besides read "1.5")? I'm happy to
finaly use a language where I can
use words of my language to name
variables, so I wonder if we could
also make that step.
That would be quite problematic in combination with lists, is
read "[1,2,3,4]" == [1,2,3,4]
or
read "[1,2,3,4]" == [1.2, 3.4]
Or something else?
As of today, at least in ghc, show ([1,2,3]::[Double])
will always produce "[1.0,2.0,3.0]". Since the requirement
for read is to read what is produced by show, that
would not be a problem.
Localized reading should be somewhere else, perhaps related to Locales.
No! If we had that, string from a program would not
be readable by some program running in other machine,
or other locale. As, actually, you describe below.
Show and Read are for programs reading, not for
user reading. That's a work for Pango :)
As an aside, this is one of the (many) places where Haskell has made the
right choice. In other languages such as Java input functions suddenly
break when the user has a different locale setting. While for user input
this might be desired, in my experience much of the i/o a program does
is with well defined file formats where changing '.' to ',' just
shouldn't happen.
Best,
Maurício
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