cf56624a4a
Zero and One have precise definitions in mathematics. Documentation has been added to describe the appropriate uses for these traits and the laws that they should satisfy. For more information regarding these identities, see the following wikipedia pages: - http://wikipedia.org/wiki/Additive_identity - http://wikipedia.org/wiki/Multiplicative_identity
65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[feature(managed_boxes)];
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use std::num::Zero;
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#[deriving(Zero)]
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struct Vector2<T>(T, T);
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impl<T: Add<T, T>> Add<Vector2<T>, Vector2<T>> for Vector2<T> {
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fn add(&self, other: &Vector2<T>) -> Vector2<T> {
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match (self, other) {
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(&Vector2(ref x0, ref y0), &Vector2(ref x1, ref y1)) => {
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Vector2(*x0 + *x1, *y0 + *y1)
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}
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}
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}
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}
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#[deriving(Zero)]
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struct Vector3<T> {
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x: T, y: T, z: T,
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}
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impl<T: Add<T, T>> Add<Vector3<T>, Vector3<T>> for Vector3<T> {
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fn add(&self, other: &Vector3<T>) -> Vector3<T> {
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Vector3 {
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x: self.x + other.x,
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y: self.y + other.y,
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z: self.z + other.z,
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}
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}
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}
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#[deriving(Zero)]
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struct Matrix3x2<T> {
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x: Vector2<T>,
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y: Vector2<T>,
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z: Vector2<T>,
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}
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impl<T: Add<T, T>> Add<Matrix3x2<T>, Matrix3x2<T>> for Matrix3x2<T> {
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fn add(&self, other: &Matrix3x2<T>) -> Matrix3x2<T> {
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Matrix3x2 {
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x: self.x + other.x,
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y: self.y + other.y,
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z: self.z + other.z,
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}
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}
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}
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pub fn main() {
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let _: Vector2<int> = Zero::zero();
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let _: Vector3<f64> = Zero::zero();
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let _: Matrix3x2<u8> = Zero::zero();
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}
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