Re: Binary: Put -> Builder

On Thu, Feb 12, 2009 at 07:28:07AM -0800, Don Stewart wrote:

ross:

...

Here's a concrete suggestion: have Data.Binary.Put export the existing function

tell :: Builder -> Put

and also

execPut :: PutM a -> Builder execPut = sndS . unPut

What's the use case?

Quoting a previous message:

I imagine one might want to make a Builder for a composite object, using the Binary instances of some types. And one might want to go the other way too, defining a Binary instance using an existing Builder.