euclid/
num.rs

1// Copyright 2014 The Servo Project Developers. See the COPYRIGHT
2// file at the top-level directory of this distribution.
3//
4// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7// option. This file may not be copied, modified, or distributed
8// except according to those terms.
9//! A one-dimensional length, tagged with its units.
10
11use num_traits;
12
13pub trait Zero {
14    fn zero() -> Self;
15}
16
17impl<T: num_traits::Zero> Zero for T {
18    fn zero() -> T {
19        num_traits::Zero::zero()
20    }
21}
22
23pub trait One {
24    fn one() -> Self;
25}
26
27impl<T: num_traits::One> One for T {
28    fn one() -> T {
29        num_traits::One::one()
30    }
31}
32
33pub trait Round: Copy {
34    fn round(self) -> Self;
35}
36pub trait Floor: Copy {
37    fn floor(self) -> Self;
38}
39pub trait Ceil: Copy {
40    fn ceil(self) -> Self;
41}
42
43macro_rules! num_int {
44    ($ty:ty) => (
45        impl Round for $ty {
46            #[inline]
47            fn round(self) -> $ty { self }
48        }
49        impl Floor for $ty {
50            #[inline]
51            fn floor(self) -> $ty { self }
52        }
53        impl Ceil for $ty {
54            #[inline]
55            fn ceil(self) -> $ty { self }
56        }
57    )
58}
59macro_rules! num_float {
60    ($ty:ty) => (
61        impl Round for $ty {
62            #[inline]
63            fn round(self) -> $ty { self.round() }
64        }
65        impl Floor for $ty {
66            #[inline]
67            fn floor(self) -> $ty { self.floor() }
68        }
69        impl Ceil for $ty {
70            #[inline]
71            fn ceil(self) -> $ty { self.ceil() }
72        }
73    )
74}
75
76num_int!(i16);
77num_int!(u16);
78num_int!(i32);
79num_int!(u32);
80num_int!(i64);
81num_int!(u64);
82num_int!(isize);
83num_int!(usize);
84num_float!(f32);
85num_float!(f64);
euclid/num.rs

euclid/
num.rs
