map

1 {
2     assert(ok(42).map!(a => a/2).value == 21);
3     assert(ok().map!(() => 42).value == 42);
4     assert(err!int("foo").map!(a => 42).error == "foo");
5     assert(err("foo").map!(() => 42).error == "foo");
6 }
7 
8 // remap hook
9 {
10     static struct Hook {}
11     auto res = ok(42).map!(a => a/2, Hook);
12     assert(res == 21);
13     static assert(is(typeof(res) == Expected!(int, string, Hook)));
14 }