1const builtin = @import("builtin");
 2const A = error{
 3    FileNotFound,
 4    NotDir,
 5};
 6const B = error{OutOfMemory};
 7
 8const C = A || B;
 9
10fn foo() C!void {
11    return error.NotDir;
12}
13
14test "merge error sets" {
15    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
16
17    if (foo()) {
18        @panic("unexpected");
19    } else |err| switch (err) {
20        error.OutOfMemory => @panic("unexpected"),
21        error.FileNotFound => @panic("unexpected"),
22        error.NotDir => {},
23    }
24}