assertEmpty

// Issue 9588 - format prints context pointer for struct
static struct S { int x; bool empty() { return x == 0; } }

S s = S(1);
assert(assertEmpty(s).getExceptionMsg == ".empty is false : S(1)");

s.x = 0;
assertEmpty(s);

assert(assertNotEmpty(s).getExceptionMsg == ".empty is true : S(0)");
s.x = 1;
assertNotEmpty(s);