Re: [Haskell-cafe] ANNOUNCE: HStringTemplate -- An Elegant, Functional, Nifty Templating Engine for Haskell

On Jan 14, 2008 2:47 AM, Sterling Clover wrote:

HStringTemplate is a port of Terrence Parr's lovely StringTemplate (http://www.stringtemplate.org) engine to Haskell.

This is very cool. Your docs describe a function, cacheSTGroup: cacheSTGroup :: Int -> STGen a -> STGen a Given an integral amount of seconds and a group, returns a group cached for that span of time. Does not cache "misses." How does this work without breaking referential transparency? Shouldn't it be in the IO monad if it is time-dependent? Graham