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 | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |