| 1 | const expectEqual = @import("std").testing.expectEqual; |
| 2 | |
| 3 | test "while error union capture" { |
| 4 | var sum1: u32 = 0; |
| 5 | numbers_left = 3; |
| 6 | while (eventuallyErrorSequence()) |value| { |
| 7 | sum1 += value; |
| 8 | } else |err| { |
| 9 | try expectEqual(error.ReachedZero, err); |
| 10 | } |
| 11 | } |
| 12 | |
| 13 | var numbers_left: u32 = undefined; |
| 14 | |
| 15 | fn eventuallyErrorSequence() anyerror!u32 { |
| 16 | return if (numbers_left == 0) error.ReachedZero else blk: { |
| 17 | numbers_left -= 1; |
| 18 | break :blk numbers_left; |
| 19 | }; |
| 20 | } |
| 21 | |
| 22 | // test |