Parameterized Structs

[Regan Heath]

On Thu, 03 Mar 2011 08:36:41 -0000, Ali Çehreli <acehreli at yahoo.com> wrote:

> On 03/03/2011 12:21 AM, Peter Lundgren wrote:
>
>  >>   >>  On 03/02/2011 08:56 PM, Peter Lundgren wrote:
>
>  >>   >>>  struct MyStruct(T, T[] a) {
>  >>   >>>        ...
>  >>   >>>  }
>  >>   >>>
>  >>   >>>  but I receive the following error:
>  >>   >>>
>  >>   >>>  Error: arithmetic/string type expected for value-parameter,  
> not T[]
>
> ...
>
>  > That's closer, except I want to pass a value parameter (specifically,  
> some compile
>  > time instance of SomeContainer) instead of a type parameter, but that  
> doesn't look
>  > like it's supported.
>
> I finally get it! :)
>
> Yes, there are limitations for template value parameters. The spec at
>
>    http://digitalmars.com/d/2.0/template.html#TemplateValueParameter
>
> says:
>
> <quote>
> Template value parameter types can be any type which can be statically  
> initialized at compile time, and the value argument can be any  
> expression which can be evaluated at compile time. This includes  
> integers, floating point types, and strings.
> </quote>

So.. you could pass your alphabet in a string, then split it into  
characters internally.  For example.

R