Re: [Haskell-cafe] Is this a GHC parser error? A test case compiles from one line but not another.

On Sep 9, 2017, at 18:14, David Feuer wrote:

Where clauses are not *always* attached to definitions. They can also be attached to case branches.

Ah, you’re right of course, I forgot about this.

What I believe is true is that anywhere a set of guards could occur, they may be followed by a where clause, and vice versa.

This appears to be true in standard Haskell, but interestingly, it seems that where clauses *cannot* be attached to a multi-way if expression. Whether or not that counts as a “set of guards” is debatable, but I usually think of them that way, so it’s potentially worth nothing.