#13 #14 closed

examples/Display_example.rs

@@ -0,0 +1,16 @@
+use tagged_core::Tagged;
+
+
+#[derive(Debug)]
+struct UserIdTag {
+    a: Tagged<u32, Self>,
+    b: Tagged<u32, Self>,
+}
+
+
+fn main() {
+    let instance = UserIdTag{a: 1.into(), b: 2.into()};
+
+    println!("{}", instance.a);
+    println!("{:?}", instance.b);
+}

examples/Hash_example.rs

@@ -0,0 +1,15 @@
+
+fn main() {
+    use tagged_core::Tagged;
+    use std::collections::HashSet;
+
+    #[derive(Clone, Hash, Debug, PartialEq, Eq)]
+    struct User {
+        id: Tagged<String, Self>
+    }
+    let mut s: HashSet<User> = HashSet::new();
+    let user = User{id: "me@example.com".into()};
+    s.insert(user.clone());
+
+    assert!(s.contains(&user));
+}

tagged-core/src/lib.rs

@@ -1,5 +1,8 @@
 use std::cmp::Ordering;
+use std::fmt;
 use std::ops::Deref;
+use std::hash::{Hash, Hasher};
+
 /// rust-tagged provides a simple way to define strongly typed wrappers over primitive types like String, i32, Uuid, chrono::DateTime, etc. It helps eliminate bugs caused by misusing raw primitives for conceptually distinct fields such as UserId, Email, ProductId, and more.
 /// 
 /// Eliminate accidental mixups between similar types (e.g. OrgId vs UserId)
@@ -92,6 +95,33 @@ impl<T: Ord, Tag> Ord for Tagged<T, Tag> {
     }
 }
 
+impl<T: fmt::Debug, Tag> fmt::Debug for Tagged<T, Tag> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.value.fmt(f)
+    }
+}
+
+impl<T: fmt::Display, Tag> fmt::Display for Tagged<T, Tag> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.value.fmt(f)
+    }
+}
+
+impl<T: Clone, Tag> Clone for Tagged<T, Tag> {
+    fn clone(&self) -> Self {
+        Self {
+            value: self.value.clone(),
+            _marker: std::marker::PhantomData,
+        }
+    }
+}
+
+impl<T: Hash, Tag> Hash for Tagged<T, Tag> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.value.hash(state)
+    }
+}
+
 // For all common primitive types
 // macro_rules! impl_from_tagged {
 //     ($($t:ty),*) => {