OpenEuphoria

Ez: Types

• Posted by Christian.CUVIER at agriculture.gouv.fr Oct 14, 2003
• 428 views

> From: Don Phillips <EuNexus at yahoo.com>
> Subject: Types
> 
> 
> Just my personal opinion of something I would like to see come down the 
> pipe some time in the near future hint hint =)
> 
> My current beef is with custom types...
> 
[snip]

> [What I] would like to propose is more control and flexibility over the final 
> outcome of a variables value.
> 
> =====
> Example:
> 
> type hour(integer x)
>    while x < 0 do
>       x += 24
>    end while
> 
>    while x > 23 do
>       x -= 24
>    end while
> 
>    return x -- assigned back to variable
> end type
> 
> hour h1, h2
> 
> h1 = 10      -- ok
> h2 = 25      -- ok, h2 is actually assigned the value of 1
> =====
> 
> While I do agree that the above case is rather striking in its 
> appearance and effects, and if misused could seriously create hard to 
> track down bugs, but I also think this kind of addition would create 
> clearer code in most cases.
> 
> In addition, it also paves the way for some very interesting 
> possibilities like default parameters and other such things...
> 
> =====
> type args(object params)
>    -- {required,def=1,def=2}
>    if atom(params)
>       return( {params,1,2} )
>    else
>       if length(params) = 1 then
>          return( params & 1 & 2 )
>       elsif length(params) = 2
>          return( params & 2 )
>       end if
>    end if
>    return( params[1..3] )
> end type
> =====
> 
> Heh, aww nevermind me... im just blabbing...
> I would never actually expect anything like this to actually make it 
> into production as it violates too many of Euphorias principles.
> 
> IMO though it would be nice to have ,)
> 


You'll have this in OpenEuphoria. It's called reftype, and it can act on 
the value
as well as the var getting assigned.

CChris