Get template parameter value

[Kagamin via Digitalmars-d-learn]

On Tuesday, 29 September 2015 at 09:11:15 UTC, John Colvin wrote:
> Welcome to the weird and wonderful work of  
> http://dlang.org/expression.html#IsExpression

No, use template pattern matching instead:

struct A(int s){}
template B(T:A!s, int s){ enum B=s; }
static assert(B!(A!4)==4);