[Haskell-cafe] FIXME pragma

[Roman Cheplyaka]

On 18/05/15 13:12, Tobias Florek wrote:
> Hi,
> 
>>>     I also wanted such a feature but eventually I just went with:
>>>
>>>     __todo :: String -> a
>>>     {-# WARNING __todo "TODO" #-}
>>>     __todo msg = error $ "TODO: " ++ msg
>>>
>>>     __fixme :: a -> a
>>>     {-# WARNING __fixme "FIXME" #-}
>>>     __fixme = id
> 
>> I found WARNING fell short because it doesn't work on module-local
>> definitions, and only triggers on use.
> 
> Maybe I am missing things, but `__todo` should generate a warning at use
> site which _is_ the module definition of the thing using it.

Yes, that's right. The downside of __todo is that you can't specify the
text of the compiler warning. (The String argument is the text of the
runtime error.)

Roman


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