From 2de8a8c54d7090dd063bed8b6b283c2fcb452e43 Mon Sep 17 00:00:00 2001
From: Dave Gauer <dave@ratfactor.com>
Date: Sat, 30 Jan 2021 20:00:32 -0500
Subject: Added ex 21-26 for error handling

---
 22_errors2.zig | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 22_errors2.zig

(limited to '22_errors2.zig')

diff --git a/22_errors2.zig b/22_errors2.zig
new file mode 100644
index 0000000..fcfd391
--- /dev/null
+++ b/22_errors2.zig
@@ -0,0 +1,30 @@
+//
+// A common case for errors is a situation where we're expecting to
+// have a value OR something has gone wrong. Take this example:
+//
+//     var text: Text = getText('foo.txt');
+//
+// What happens if getText() can't find 'foo.txt'?  How do we express
+// this in Zig?
+//
+// Zig let's us make what's called an "error union" which is a value
+// which could either be a regular value OR an error from a set:
+//
+//     var text: MyErrorSet!Text =  getText('foo.txt');
+//
+// For now, let's just see if we can try making an error union!
+//
+const std = @import("std");
+
+const MyNumberError = error{ TooSmall };
+
+pub fn main() void {
+    var my_number: ??? = 5;
+
+    // Looks like my_number will need to either store a number OR
+    // an error. Can you set the type correctly above?
+    my_number = MyNumberError.TooSmall;
+
+    std.debug.print("I compiled!", .{});
+}
+
-- 
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