Merge remote-tracking branch 'upstream/main' into fix-enum-variant-inconsistency

1 files changed, 32 insertions, 0 deletions

diff --git a/solutions/15_traits/traits1.rs b/solutions/15_traits/traits1.rs
new file mode 100644
index 0000000..790873f
--- /dev/null
+++ b/solutions/15_traits/traits1.rs
@@ -0,0 +1,32 @@
+// The trait `AppendBar` has only one function which appends "Bar" to any object
+// implementing this trait.
+trait AppendBar {
+    fn append_bar(self) -> Self;
+}
+
+impl AppendBar for String {
+    fn append_bar(self) -> Self {
+        self + "Bar"
+    }
+}
+
+fn main() {
+    let s = String::from("Foo");
+    let s = s.append_bar();
+    println!("s: {s}");
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn is_foo_bar() {
+        assert_eq!(String::from("Foo").append_bar(), "FooBar");
+    }
+
+    #[test]
+    fn is_bar_bar() {
+        assert_eq!(String::from("").append_bar().append_bar(), "BarBar");
+    }
+}