generics2 solution

exercises/14_generics/generics2.rs

@@ -1,10 +1,10 @@
 // This powerful wrapper provides the ability to store a positive integer value.
-// Rewrite it using generics so that it supports wrapping ANY type.
-
+// TODO: Rewrite it using a generic so that it supports wrapping ANY type.
 struct Wrapper {
     value: u32,
 }
 
+// TODO: Adapt the struct's implementation to be generic over the wrapped value.
 impl Wrapper {
     fn new(value: u32) -> Self {
         Wrapper { value }

rustlings-macros/info.toml

@@ -746,12 +746,8 @@ the generic of the vector."""
 name = "generics2"
 dir = "14_generics"
 hint = """
-Currently we are wrapping only values of type `u32`.
-
-Maybe we could update the explicit references to this data type somehow?
-
-If you are still stuck https://doc.rust-lang.org/stable/book/ch10-01-syntax.html#in-method-definitions
-"""
+Related section in The Book:
+https://doc.rust-lang.org/stable/book/ch10-01-syntax.html#in-method-definitions"""
 
 # TRAITS
 

solutions/14_generics/generics2.rs

@@ -1 +1,28 @@
-// Solutions will be available before the stable release. Thank you for testing the beta version 🥰
+struct Wrapper<T> {
+    value: T,
+}
+
+impl<T> Wrapper<T> {
+    fn new(value: T) -> Self {
+        Wrapper { value }
+    }
+}
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn store_u32_in_wrapper() {
+        assert_eq!(Wrapper::new(42).value, 42);
+    }
+
+    #[test]
+    fn store_str_in_wrapper() {
+        assert_eq!(Wrapper::new("Foo").value, "Foo");
+    }
+}