kata/ziglings
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Update exercises/108_labeled_switch.zig

Browse source 
Fixed an error in the debug statement and made the text a bit more coherent.

Signed-off-by: chrboesch <chrboesch@noreply.codeberg.org>
This commit is contained in:
chrboesch 2025-01-08 13:22:29 +00:00
parent 54f743ba43
commit 90d05995b5
1 changed files with 9 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
exercises/108_labeled_switch.zig
View file

@ -15,11 +15,11 @@
// 1 => { op = 2; continue; },
// 2 => { op = 3; continue; },
// 3 => return,
// 4 => {},
// else => {},
// }
// break;
// }
// std.debug.print("This statement cannot be reached");
// std.debug.print("This statement cannot be reached\n", .{});
// }
//
// By combining all we've learned so far, we can now proceed with a labeled switch
@ -36,23 +36,21 @@
// 3 => return,
// else => {},
// }
// std.debug.print("This statement cannot be reached");
// std.debug.print("This statement cannot be reached\n", .{});
// }
//
// The flow of execution on this second case is:
// 1. The switch starts with value '1';
// 2. The switch evaluates to case '1' which in turn uses the continue statement
// to re-evaluate the labeled switch again, now providing the value '2';
// to re-evaluate the labeled switch again, now providing the value '2';
// 3. In the case '2' we repeat the same pattern as case '1'
// but instead the value to be evaluated is now '3';
// 4. Finally we get to case '3', where we return from the function as a whole.
// but instead the value to be evaluated is now '3';
// 4. Finally we get to case '3', where we return from the function as a whole,
// so the debug statement is never executed.
// 5. In this example, since the input does not have clear, exhaustive patterns and
// can essentially be any `u8` integer, we need to handle all cases not explicitly
// covered by using the `else => {}` branch as the default case.
// can essentially be any 'u8' integer, we need to handle all cases not explicitly
// covered by using the 'else => {}' branch as the default case.
//
// Since step 4 or a break stament do not exist in this switch, the debug statement is
// never executed
//
const std = @import("std");