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  • #4316

Closed
Open
Opened Sep 15, 2010 by mitar@trac-mitar

Interactive "do" notation in GHCi

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.

Trac metadata
Trac field Value
Version 6.12.3
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component GHCi
Test case
Differential revisions
BlockedBy
Related
Blocking
CC mmitar@gmail.com
Operating system
Architecture
Edited Mar 09, 2019 by Simon Marlow
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8.0.1
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8.0.1 (Past due)
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Reference: ghc/ghc#4316