问题
I swear I saw a new feature in a recent set of GHC release notes - but now I can find no reference to it. Am I delusional, or does this feature actually exist?
It was to do with loading incomplete modules. As best as I can remember, it allows you to turn off compilation errors due to undefined variables. (Naturally, at run-time this causes an exception to be thrown if you try to actually use the undefined variables for anything.) Does that sound familiar? Or is my mind making this up?
回答1:
You are looking for a compile time option, vs a language extension, of "defer errors to runtime". That is, compile with -fdefer-type-errors.
来源：https://stackoverflow.com/questions/17495407/new-ghc-feature-did-i-imagine-it