the resolution of abbreviated commands in ghci is surprising.
GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> :i True
data Bool = ... | True -- Defined in GHC.Bool
Prelude> :def ifoo \_ -> putStrLn "ifoo" >> return ""
Prelude> :i True
ifooIt seems that abbreviations are resolved to the command, that matches the prefix, which is defined last. I've found this behaviour very confusing in practice.
I'd expect rebinding :i to some command that's not :info to require an explicit declaration.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.12.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | GHCi |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | Saizan |
| Operating system | |
| Architecture |