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Diffstat (limited to 'exercises')
| -rw-r--r-- | exercises/108_labeled_switch.zig | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/exercises/108_labeled_switch.zig b/exercises/108_labeled_switch.zig new file mode 100644 index 0000000..623e359 --- /dev/null +++ b/exercises/108_labeled_switch.zig @@ -0,0 +1,34 @@ +// +// A labeled switch in zig allows the usage of continue and break +// just like loops, these allow you to create very concise +// Finite State Automata to represent state transitions +// +// foo: switch (state) { +// 1 => continue :foo 2, +// 2 => continue :foo 3, +// 3 => return, +// 4 => {}, +// ... +// } +// +const std = @import("std"); + +const PullRequestState = enum { + Draft, + InReview, + Approved, + Rejected, + Merged, +}; + +pub fn main() void { + // Something is wrong, it seems your Pull Request can never be merged + // try to fix it! + pr: switch (@as(PullRequestState, PullRequestState.Draft)) { + PullRequestState.Draft => continue :pr PullRequestState.InReview, + PullRequestState.InReview => continue :pr PullRequestState.Rejected, + PullRequestState.Approved => continue :pr PullRequestState.Merged, + PullRequestState.Rejected => std.debug.print("The pull request has been rejected", .{}), + PullRequestState.Merged => std.debug.print("The pull request has been merged", .{}), + } +} |
