| Interestingly, if I import only Control.Applicative from within GHCi, it
| does not find the instances defined in Control.Monad.Instances although
| this module is imported in Control.Applicative. On the other hand, if I
| write a file containing the line 'import Control.Applicative' and load
|
On Fri, Dec 10, 2010 at 09:33, Simon Peyton-Jones simo...@microsoft.com wrote:
| Interestingly, if I import only Control.Applicative from within GHCi, it
| does not find the instances defined in Control.Monad.Instances although
| this module is imported in Control.Applicative. On the other
On Fri, 2010-12-10 at 08:33 +, Simon Peyton-Jones wrote:
If there's a consensus that the behaviour is wrong, or at least
unexpected, would you like to make a reproducible test case and file a
ticket?
I took Erik's mail as indicator that the behaviour of GHCi is
inconsistent and
Hello,
according to
http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Monad.html
Control.Monad exports 20 Functor instance declarations in base-4.3.0.0.
However:
bash# ghc-pkg list | grep base
base-4.3.0.0
bash# ghci --version
The Glorious Glasgow Haskell
Hi Sebastian,
I imagine that many of the instances are defined in the module that
defines the data type. For example, the STM instance is defined in the
same module as the STM type.
Are there any particular ones you're running into problems with?
Take care,
Antoine
On Thu, Dec 9, 2010 at 11:10
Hi Antoine,
On Thu, 2010-12-09 at 23:20 -0600, Antoine Latter wrote:
Are there any particular ones you're running into problems with?
Yes, I cannot find the instance for ((-) r).
Even if I import
Control.Monad
Control.Monad.Reader
Control.Applicative
Data.Functor
On Fri, 2010-12-10 at 14:35 +0900, Sebastian Fischer wrote:
Yes, I cannot find the Functor instance for ((-) r).
As the Applicative instance for ((-) r) depends on the Functor instance
I only needed to go through the imports of Control.Applicative to find
that the Functor instance of ((-) r) is
