Single-Stepping evaluation in GHCi
The goal is to have, in GHCi, the interim results provided by the function before the end result by a command available from the prompt, like this: for example:[[BR]]
Prelude> g op n [] = n ; g op n (h:t) = h op
g op n t[[BR]]
Prelude> :stp[[BR]]
Prelude> g (*) 2 [1..3][[BR]]
1* (*) 2 [2,3][[BR]]
1*2 (*) 2 [3][[BR]]
1*2*3 (*) 2 [][[BR]]
1*2*3*2[[BR]]
12[[BR]]
Prelude>[[BR]]
And to quit the mode we write from the prompt a command like this[[BR]]
Prelude> :quitstp
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
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Blocking | |
CC | |
Operating system | |
Architecture |