[prev in list] [next in list] [prev in thread] [next in thread] 

List:       haskell-cafe
Subject:    Re: [Haskell-cafe] Re: what is inverse of mzero and return?
From:       Jorge Adriano Aires <jadrian () mat ! uc ! pt>
Date:       2005-01-25 2:05:34
Message-ID: 200501250205.34975.jadrian () mat ! uc ! pt
[Download RAW message or body]

(Sorry about the recurrent self answers)

> Maybe (not sure) it is sensible to
> sapecify return::(a -> IO a), as an action with no side effects such that

> return x === return x  iff  x === x. 
return x === return y iff x === y    <-- this is what I meant to write.

But even that is not enough, should be:
"return x is an action with no side effects and that always returns x" 

The previous specification is be a consequence of this one, and it failed to 
specify that the returned value was always x.

J.A.

[prev in list] [next in list] [prev in thread] [next in thread]