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+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Operations on tuples
+//!
+//! To access a single element of a tuple one can use the following
+//! methods:
+//!
+//! * `valN` - returns a value of _N_-th element
+//! * `refN` - returns a reference to _N_-th element
+//! * `mutN` - returns a mutable reference to _N_-th element
+//!
+//! Indexing starts from zero, so `val0` returns first value, `val1`
+//! returns second value, and so on. In general, a tuple with _S_
+//! elements provides aforementioned methods suffixed with numbers
+//! from `0` to `S-1`. Traits which contain these methods are
+//! implemented for tuples with up to 12 elements.
+//!
+//! If every type inside a tuple implements one of the following
+//! traits, then a tuple itself also implements it.
+//!
+//! * `Clone`
+//! * `PartialEq`
+//! * `Eq`
+//! * `PartialOrd`
+//! * `Ord`
+//! * `Default`
+//!
+//! # Examples
+//!
+//! Using methods:
+//!
+//! ```
+//! #[allow(deprecated)]
+//! # fn main() {
+//! let pair = ("pi", 3.14f64);
+//! assert_eq!(pair.val0(), "pi");
+//! assert_eq!(pair.val1(), 3.14f64);
+//! # }
+//! ```
+//!
+//! Using traits implemented for tuples:
+//!
+//! ```
+//! use std::default::Default;
+//!
+//! let a = (1i, 2i);
+//! let b = (3i, 4i);
+//! assert!(a != b);
+//!
+//! let c = b.clone();
+//! assert!(b == c);
+//!
+//! let d : (u32, f32) = Default::default();
+//! assert_eq!(d, (0u32, 0.0f32));
+//! ```
+
+#![doc(primitive = "tuple")]
+#![stable]