On Mon, Sep 17, 2007 at 04:15:10PM +1200, Tom Pledger wrote: > Norman Ramsey wrote: > : > | This code fails to compile because the compiler is willing to > | use 'fold' at only one type (CmmExpr as it happens) > : > > When it failed to compile, was > > fold = foldRegsUsed > > a top-level declaration in the module, rather than local to foldRegsUsed? > > If so, try working around the monomorphism restriction by changing from a > pattern binding to a function binding. > > fold f = foldRegsUsed f
The monomorphism restriction is not affected by top-level-or-not, see sections 4.5.1 and 4.5.5 in the Haskell 98 Language and Libraries Report. Stefan
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