On Tuesday, 29 September 2015 at 09:53:39 UTC, Kagamin wrote:
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);
For some reason I never think of template pattern matching. Not
my favourite feature, although it's probably just the ':' that
bothers me, I always think of implicit convertibility like in
is(T : Q). Anyway, you're right, it makes for shorter, neater
code in simple cases (the static if version is equivalent if you
just add a template constraint to it).
