From 4d7eee1817582c4bf70862d47aca9e75bb264bc7 Mon Sep 17 00:00:00 2001
From: panicbit <panicbit.dev@gmail.com>
Date: Thu, 8 Oct 2015 07:10:56 +0200
Subject: [PATCH] trpl: mention deriving in traits section

---
 src/doc/trpl/traits.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/doc/trpl/traits.md b/src/doc/trpl/traits.md
index 0870a6ef341..8726a29d710 100644
--- a/src/doc/trpl/traits.md
+++ b/src/doc/trpl/traits.md
@@ -492,3 +492,32 @@ If we forget to implement `Foo`, Rust will tell us:
 ```text
 error: the trait `main::Foo` is not implemented for the type `main::Baz` [E0277]
 ```
+
+# Deriving
+
+Implementing traits like `Debug` and `Default` over and over again can become
+quite tedious. For that reason, Rust provides an [attribute][attributes] that
+allows you to let Rust automatically implement traits for you:
+
+```rust
+#[derive(Debug)]
+struct Foo;
+
+fn main() {
+    println!("{:?}", Foo);
+}
+```
+
+[attributes]: attributes.html
+
+However, deriving is limited to a certain set of traits:
+
+- `Clone`
+- `Copy`
+- `Debug`
+- `Default`
+- `Eq`
+- `Hash`
+- `Ord`
+- `PartialEq`
+- `PartialOrd`