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-rw-r--r--exercises/13_error_handling/errors4.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/exercises/13_error_handling/errors4.rs b/exercises/13_error_handling/errors4.rs
index 0e5c08b..9449417 100644
--- a/exercises/13_error_handling/errors4.rs
+++ b/exercises/13_error_handling/errors4.rs
@@ -19,6 +19,10 @@ impl PositiveNonzeroInteger {
}
}
+fn main() {
+ // You can optionally experiment here.
+}
+
#[test]
fn test_creation() {
assert!(PositiveNonzeroInteger::new(10).is_ok());