Every statement in a do-expression has to be in the same monad.
You are mixing the list monad (v0 <- [999]) with the IO monad (putStr
"v0=").
Instead of
v0 <- [999]
try:
let v0 = [999]
Hope this helps,
Martijn.
Larry Evans wrote:
On 10/17/08 07:39, Larry Evans wrote:
The attached code produces error:
<-- cut here --
[snip]
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