029

exercises/029_errdefer.zig

@@ -19,41 +19,42 @@ var counter: u32 = 0;
 
 const MyErr = error{ GetFail, IncFail };
 
-pub fn main() void {
-    // We simply quit the entire program if we fail to get a number:
-    const a: u32 = makeNumber() catch return;
-    const b: u32 = makeNumber() catch return;
-
-    std.debug.print("Numbers: {}, {}\n", .{ a, b });
+pub fn main() void{
+  // We simply quit the entire program if we fail to get a number:
+  const a: u32 = makeNumber() catch return;
+  const b: u32 = makeNumber() catch return;
+  
+  std.debug.print("Numbers: {}, {}\n", .{ a, b });
 }
 
-fn makeNumber() MyErr!u32 {
-    std.debug.print("Getting number...", .{});
-
-    // Please make the "failed" message print ONLY if the makeNumber()
-    // function exits with an error:
-    std.debug.print("failed!\n", .{});
-
-    var num = try getNumber(); // <-- This could fail!
-
-    num = try increaseNumber(num); // <-- This could ALSO fail!
-
-    std.debug.print("got {}. ", .{num});
-
-    return num;
+fn makeNumber() MyErr!u32{
+  std.debug.print("Getting number...", .{});
+  
+  // Please make the "failed" message print ONLY if the makeNumber()
+  // function exits with an error:
+  errdefer std.debug.print("failed!\n", .{});
+  
+  var num = try getNumber(); // <-- This could fail!
+  
+  num = try increaseNumber(num); // <-- This could ALSO fail!
+  
+  std.debug.print("got {}. ", .{num});
+  
+  return num;
 }
 
-fn getNumber() MyErr!u32 {
-    // I _could_ fail...but I don't!
-    return 4;
+fn getNumber() MyErr!u32{
+  // I _could_ fail...but I don't!
+  return 4;
 }
 
-fn increaseNumber(n: u32) MyErr!u32 {
-    // I fail after the first time you run me!
-    if (counter > 0) return MyErr.IncFail;
-
-    // Sneaky, weird global stuff.
-    counter += 1;
-
-    return n + 1;
+fn increaseNumber(n: u32) MyErr!u32{
+  // I fail after the first time you run me!
+  if(counter > 0){ return MyErr.IncFail; }
+  
+  // Sneaky, weird global stuff.
+  counter += 1;
+  
+  return n + 1;
 }
+