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-rw-r--r--exercises/15_traits/traits4.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/exercises/15_traits/traits4.rs b/exercises/15_traits/traits4.rs
index 7242c48..18db0d6 100644
--- a/exercises/15_traits/traits4.rs
+++ b/exercises/15_traits/traits4.rs
@@ -25,6 +25,10 @@ fn compare_license_types(software: ??, software_two: ??) -> bool {
software.licensing_info() == software_two.licensing_info()
}
+fn main() {
+ // You can optionally experiment here.
+}
+
#[cfg(test)]
mod tests {
use super::*;