Re: [boost] Interest in an 'either' library?

Subject: Re: [boost] Interest in an 'either' library?
From: Larry Evans (cppljevans_at_[hidden])
Date: 2013-06-22 11:56:21

On 06/22/13 10:17, Larry Evans wrote:
> On 06/21/13 11:35, David Sankel wrote:
>> **semantics**:
>>
>> template< typename left_type, typename right_type>
>> struct either
>> {
[snip]
>> **uses**:
>>
>> **Use 1**: Can be used as an alternative to exceptions or the (error
>> codes+set reference idiom):
>>
>> either<error_code, file_id> load_file(...);
>>
[snip]
> Isn't this like haskell's either:
> 
> http://www.haskell.org/ghc/docs/6.12.2/html/libraries/base-4.2.0.1/Data-Either.html
> 
[snip]
> I remember seeing elsewhere that haskell's either was mentioned as
> a replacement for exceptions.  I see if I can find it.
Googling "haskell either exceptions" turned up:

http://book.realworldhaskell.org/read/error-handling.html

which, under:

  Use of Either

talks about using either to handle errors.

-regards,
Larry