On 2008 Aug 30, at 6:28, Adrian Hey wrote:
Ganesh Sittampalam wrote:
How do the implementers of Data.Unique know that they musn't let them be serialised/deserialised?
Because if you could take a String and convert it to a Unique there would be no guarantee that result was *unique*.
What stops the same rule from applying to Data.Random?
Well the only data type defined by this is StdGen, which is a Read/ Show instance. I guess there's no semantic problem with that (can't think of one off hand myself).
You *want* to be able to reproduce a given random seed, for simulations and the like. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH