test:zig

guide/language/switch.zig

@@ -0,0 +1,36 @@
+const expect = @import("std").testing.expect;
+
+// Zig's switch works as both a statement and an expression.
+// The types of all branches must coerce to the type which is being switched upon.
+// All possible values must have an associated branch - values cannot be left out.
+// Cases cannot fall through to other branches.
+
+// An example of a switch statement. The else is required to satisfy the exhaustiveness of this switch.
+test "switch statement" {
+    var x: i8 = 10;
+    switch (x) {
+        -1...1 => {
+            x = -x;
+        },
+        10, 100 => {
+            //special considerations must be made
+            //when dividing signed integers
+            x = @divExact(x, 10);
+        },
+        else => {},
+    }
+    try expect(x == 1);
+}
+
+// Here is the former, but as a switch expression.
+test "switch expression" {
+    var x: i8 = 10;
+    x = switch (x) {
+        -1...1 => -x,
+        10, 100 => @divExact(x, 10),
+        else => x,
+    };
+    try expect(x == 1);
+}
+
+// Now is the perfect time to use what you've learned and solve a problem together.