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    // Copyright 2015 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.

    #[doc(hidden)]
    pub trait NetInt {
        fn from_be(i: Self) -> Self;
        fn to_be(&self) -> Self;
    }
    macro_rules! doit {
        ($($t:ident)*) => ($(impl NetInt for $t {
            fn from_be(i: Self) -> Self { <$t>::from_be(i) }
            fn to_be(&self) -> Self { <$t>::to_be(*self) }
        })*)
    }
    doit! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }

    #[doc(hidden)]
    pub trait One {
        fn one() -> Self;
    }

    macro_rules! one {
        ($($t:ident)*) => ($(
            impl One for $t { fn one() -> $t { 1 } }
        )*)
    }

    one! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }

    #[doc(hidden)]
    pub trait Zero {
        fn zero() -> Self;
    }

    macro_rules! zero {
        ($($t:ident)*) => ($(
            impl Zero for $t { fn zero() -> $t { 0 } }
        )*)
    }

    zero! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }