#4316: Enable GHCi to run commands under StateT monad based on IO
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Reporter: mitar | Owner:
Type: feature request | Status: new
Priority: normal | Component: GHCi
Version: 6.12.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Enable GHCi to run commands under StateT monad based on IO or maybe even
any other monad based on IO. So that you could for example exec a state
and "fall" into this monad.
This could be generalized by supporting interactive "do" notation.
Currently doing something like:
{{{
(flip execStateT) state $ do
}}}
raises "Empty 'do' construct" warning, but GHCi could go into interactive
mode where it would be possible to write one command after another and it
would execute them.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4316>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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