Hi David,
Andrey's answer is correct.
I asked a similar question on StackOverflow a few years back [1]. You
might find the resulting discussion useful.
Chris
[1] http://stackoverflow.com/q/8633470/617159
On Wed, Nov 11, 2015 at 5:15 AM, David Banas
Hi all,
I don’t understand why this code:
50: instance (IsNat n, RealFloat a) => FFT (RTree n) a where
is generating this error:
fft_test.hs:50:36: Illegal instance declaration for ‘FFT (RTree n) a’ (All instance types must be of the form (T a1 ... an) where a1 ... an are *distinct type variables*, and each type variable appears at most once in the instance head. Use FlexibleInstances if you want to disable this.) In the instance declaration for ‘FFT (RTree n) a’
and was hoping someone could help me get it.
Thanks! -db
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