Re: [Haskell-cafe] Mutual scoping question

Can you do: (f, g) = let f’ = … in (f’, g’) or is a pattern match not allowed at top level? Jeff

On Nov 22, 2023, at 4:40 PM, Todd Wilson wrote:

 Hello, Cafe:

Is there a preferred way to define two top-level mutually recursive functions, f and g, that both use a common local function h such that h is (1) only defined once and (2) does not escape the scope of f and g? I suppose it could be done like this:

fg = let f ... = ... f,g,h ... g ... = ... f,g,h ... h ... = ... h ... in (f,g) f = fst fg g = snd fg

but is there something more elegant than this that I'm not seeing?

Todd Wilson _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.