[contest] Is a Cow an animal ++

[Denis Koroskin]

On Wed, 29 Sep 2010 11:21:11 +0400, Norbert Nemec  
<Norbert at nemec-online.de> wrote:

> IMHO, the test misses the point of compile-time metaprogramming: The  
> concept of "state" belongs to run-time. The D compile-time language is  
> purely functional and does not know a state or even an "order of  
> execution".
>
> The conditions "cannot die or be eaten twice" are, at their core, issues  
> of state. Any "solutions" that claim to catch one of the last three  
> errors must either go beyond the purely functional nature of the  
> compile-time language or rely on additional constraints (e.g. no reuse  
> of previous elements)
>
> Of course, one could devise a language with non-functional compile time  
> features, but within D, this would fundamentally break the existing  
> concept of meta-programming.
>
>

In D, there are templates (that are written in functional style, have no  
state etc) and there is also CTFE that allows mutable state (but no  
classes).