Hello lists,
I'm pleased to announce the first release of data-textual[1], a library
that provides human-friendly counterparts (called Printable/Textual) of
the compiler-friendly Show/Read type classes. The library is intended to
be used for printing and parsing of non-compound and non-polymorphic
compound data (e.g. numbers, network and hardware addresses, date/time,
etc).
A quick example (vs network-ip[2] library):
λ> import Data.Maybe (fromJust)
λ> import Data.Textual
λ> import Network.IP.Addr
λ> let x = fromString "[dead::b:e:e:f]:123" :: Maybe Inet6Addr
λ> x
Just (InetAddr {inetHost = ip6FromWords 0xdead 0x0 0x0 0x0 0xb 0xe 0xe
0xf, inetPort = 123})
λ> toString (fromJust x)
"[dead::b:e:e:f]:123"
λ> let y = fromStringAs aNet4Addr "192.168.100.1/24"
λ> y
Just (netAddr (ip4FromOctets 192 168 100 1) 24)
λ> toText (netPrefix $ fromJust y)
"192.168.100.0"
[1] http://hackage.haskell.org/package/data-textual
[2] http://hackage.haskell.org/package/network-ip
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