mirror of
https://github.com/ziglang/zig.git
synced 2024-11-30 09:02:32 +00:00
20 lines
570 B
Zig
20 lines
570 B
Zig
|
const expect = @import("std").testing.expect;
|
||
|
|
|
||
|
|
test "error union" {
|
||
|
|
var foo: anyerror!i32 = undefined;
|
||
|
|
|
||
|
|
// Coerce from child type of an error union:
|
||
|
|
foo = 1234;
|
||
|
|
|
||
|
|
// Coerce from an error set:
|
||
|
|
foo = error.SomeError;
|
||
|
|
|
||
|
|
// Use compile-time reflection to access the payload type of an error union:
|
||
|
|
try comptime expect(@typeInfo(@TypeOf(foo)).ErrorUnion.payload == i32);
|
||
|
|
|
||
|
|
// Use compile-time reflection to access the error set type of an error union:
|
||
|
|
try comptime expect(@typeInfo(@TypeOf(foo)).ErrorUnion.error_set == anyerror);
|
||
|
|
}
|
||
|
|
|
||
|
|
// test
|