问题
When I compile a Haskell file with ghci, typically with :load, and if there is no type error, all the expressions are loaded in the ghc interpreter. It's very nice: I can play around with :t to figure out the type of various expressions.
My problem is: if there is a tiny error somewhere, ghci is not able to load anything (not even the imported modules!!), which makes finding the right types even more difficult. I always do the same: comment out all the bits that do not typecheck, find the relevant types wiht :t in ghci, and de-comment.
But this is so tedious! Is there a better workflow for "partially compiling" a Haskell source code?
回答1:
As @MikhailGlushenkov pointed out in the comments, the solution is to use the -fdefer-type-errors flag to GHCi.
来源：https://stackoverflow.com/questions/27780282/ghc-partially-compile-haskell-code