[Haskell-cafe] Extending the idea of a general Num to other types?

[Peter Verswyvelen]

Instead of just adapting the compiler to give better errors, it would 
really help if a unique identifier was assigned to each error/warning, 
and if a WIKI and help file existed that describes the errors in detail. 
Maybe this is already the case, but after a quick search I failed to 
find such a list of errors.

Cheers,
Peter

Bulat Ziganshin wrote:
> Hello Simon,
>
> Wednesday, September 5, 2007, 12:56:18 PM, you wrote:
>
>   
>>         String is not an instance of class Foo  -- single param
>>         No instance for (Bar String Int)                -- multi-param
>>     
>
>   
>> Would that be better (single-param case is easier), or worse (inconsistent)?
>>     
>
> easier - most classes are one-parameter
>
>
>
>