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Diffstat (limited to 'exercises/33_iferror.zig')
-rw-r--r-- | exercises/33_iferror.zig | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/exercises/33_iferror.zig b/exercises/33_iferror.zig deleted file mode 100644 index 67777a9..0000000 --- a/exercises/33_iferror.zig +++ /dev/null @@ -1,49 +0,0 @@ -// -// Let's revisit the very first error exercise. This time, we're going to -// look at a special error-handling type of the "if" statement. -// -// if (foo) |value| { -// -// // foo was NOT an error; value is the non-error value of foo -// -// } else |err| { -// -// // foo WAS an error; err is the error value of foo -// -// } -// -// We'll take it even further and use a switch statement to handle -// the error types. -// -const MyNumberError = error{ - TooBig, - TooSmall, -}; - -const std = @import("std"); - -pub fn main() void { - var nums = [_]u8{ 2, 3, 4, 5, 6 }; - - for (nums) |num| { - std.debug.print("{}", .{num}); - - var n = numberMaybeFail(num); - if (n) |value| { - std.debug.print("=4. ", .{}); - } else |err| switch (err) { - MyNumberError.TooBig => std.debug.print(">4. ", .{}), - // Please add a match for TooSmall here and have it print: "<4. " - } - } - - std.debug.print("\n", .{}); -} - -// This time we'll have numberMaybeFail() return an error union rather -// than a straight error. -fn numberMaybeFail(n: u8) MyNumberError!u8 { - if (n > 4) return MyNumberError.TooBig; - if (n < 4) return MyNumberError.TooSmall; - return n; -} |