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--- programming:rust [2020/12/13 18:10] – [Traits] mh
+++ programming:rust [2020/12/13 18:22] – [Traits] mh
@@ Line 483: / Line 483: @@
 A **trait** tells the Rust compiler about functionality a particular type has and can share with other types.
 </WRAP>
+=== Defining ===
+[[https://doc.rust-lang.org/book/ch10-02-traits.html#defining-a-trait|Chapter 10.2]] details how to create a trait like this one :
+<code rust>
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+</code>
+Each type implementing the ''Summary'' trait must define it's own custom behavior for the body of the ''summarize'' method. The compiler will enforce this. Note that instead of a '';'' semicolon a default behavior could be set on the trait declaration within ''{}'' curly brackets.
+To implement a trait on a type :
+<code rust>
+impl Summary for SomeStruct {
+    fn summarize(&self) -> String {
+        //some code
+    }
+}
+</code>
+If the trait had a default behavior, this implementation will override it.
+Default implementations can also call other methods in the same trait, even if those other methods don't have a default implementation.
 ===== Misc =====