[Haskell-cafe] Getting types inside a function in ghci
chrisdone at gmail.com
Tue Oct 29 22:06:08 UTC 2013
On 29 October 2013 22:36, martin <martin.drautzburg at web.de> wrote:
> is there a way to determine types of symbols which are not toplevel but
> inside a function?
Not at present without transformation. There are two reasonably reliable
Insert noisy holes/make intentional type errors:
Holes will land in GHC to support this explicitly. I don't know what
version of GHC has/will have this.
Alternatively, you can use ghc-mod (https://github.com/kazu-yamamoto/ghc-mod)
which, if you can get it to work, can tell you the types of sub-expressions.
Lastly, the next version of the FP Complete IDE gives you types of
sub-expressions just by clicking on them or selecting them out of the box.
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