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+// Copyright 2018 Developers of the Rand project.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! The PCG random number generators.
+//!
+//! This is a native Rust implementation of a small selection of PCG generators.
+//! The primary goal of this crate is simple, minimal, well-tested code; in
+//! other words it is explicitly not a goal to re-implement all of PCG.
+//!
+//! This crate provides:
+//!
+//! -   `Pcg32` aka `Lcg64Xsh32`, officially known as `pcg32`, a general
+//!     purpose RNG. This is a good choice on both 32-bit and 64-bit CPUs
+//!     (for 32-bit output).
+//! -   `Pcg64Mcg` aka `Mcg128Xsl64`, officially known as `mcg_xsl_rr_128_64`,
+//!     a general purpose RNG using 128-bit multiplications. This has poor
+//!     performance on 32-bit CPUs but is a good choice on 64-bit CPUs for
+//!     both 32-bit and 64-bit output. (Note: this RNG is only available using
+//!     Rust 1.26 or later.)
+//!
+//! Both of these use 16 bytes of state and 128-bit seeds, and are considered
+//! value-stable (i.e. any change affecting the output given a fixed seed would
+//! be considered a breaking change to the crate).
+
+#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
+       html_favicon_url = "https://www.rust-lang.org/favicon.ico",
+       html_root_url = "https://rust-random.github.io/rand/")]
+
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+
+#![no_std]
+
+extern crate rand_core;
+
+#[cfg(feature="serde1")] extern crate serde;
+#[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
+
+mod pcg64;
+#[cfg(rust_1_26)] mod pcg128;
+
+pub use self::pcg64::{Pcg32, Lcg64Xsh32};
+#[cfg(rust_1_26)] pub use self::pcg128::{Pcg64Mcg, Mcg128Xsl64};