isObservable

1 struct TestObservable
2 {
3     alias ElementType = int;
4 
5     Disposable subscribe(T)(T observer)
6     {
7         static assert(isObserver!(T, int));
8         return null;
9     }
10 }
11 
12 static assert(isObservable!(TestObservable));
13 static assert(isObservable!(TestObservable, int));
14 static assert(!isObservable!(TestObservable, Object));

static assert(isObservable!(Observable!int));
static assert(!isObservable!(Observer!int));
static assert(!isObservable!(string));
static assert(!isObservable!(Object));