[Haskell-cafe] Re: How to check if two Haskell files are the same?

[Mauricio]

>> I would like to write a Haskell pretty-printer,
>> using standard libraries for that. How can I
>> check if the original and the pretty-printed
>> versions are the same? For instance, is there
>> a file generated by GHC at the compilation
>> pipe that is always guaranteed to have the
>> same MD5 hash when it comes from equivalent
>> source?
> 
> Compare .hi files?
> 

That was my first thought, but can I be sure
.hi files are going to be exactly the same,
i.e., isn't there some kind of information
(timestamps?) that can change without changes
in the code?

Maurício