Adding trait associated-constants

src/lib.rs

@@ -34,9 +34,10 @@ mod unit_integration_tests;
 mod temp;
 mod type_;
 mod trait_simple_vs_enum;
-mod trait_when_to_use_dyn_dispatch;
-mod trait_object_vs_struct_obj;
+mod traits_when_to_use_dyn_dispatch;
+mod traits_object_vs_struct_obj;
 mod traits;
+mod traits_associated_constants;
 mod traits_associated_type_vs_generics;
 mod traits_default_type_parameter;
 mod traits_return_impl; // todo: incomplete

src/traits_associated_constants.rs

@@ -0,0 +1,18 @@
+// https://doc.rust-lang.org/reference/items/associated-items.html#associated-constants
+
+trait MyTrait {
+    const MY_CONST: u8; // Associated Constant
+    fn bar();
+}
+
+struct Foo;
+
+impl MyTrait for Foo {
+    const MY_CONST: u8 = 42;
+    fn bar() {}
+}
+
+#[test]
+fn ex1() {
+    assert_eq!(Foo::MY_CONST, 42);
+}