70 lines
2.4 KiB
Rust
70 lines
2.4 KiB
Rust
// Copyright 2012-2014 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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macro_rules! assert_approx_eq {
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($a:expr, $b:expr) => ({
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let (a, b) = (&$a, &$b);
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assert!((*a - *b).abs() < 1.0e-6,
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"{} is not approximately equal to {}", *a, *b);
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})
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}
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pub fn main() {
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use std::f32;
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use std::f64;
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assert_approx_eq!(64f32.sqrt(), 8f32);
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assert_approx_eq!(64f64.sqrt(), 8f64);
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assert_approx_eq!(25f32.powi(-2), 0.0016f32);
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assert_approx_eq!(23.2f64.powi(2), 538.24f64);
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assert_approx_eq!(0f32.sin(), 0f32);
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assert_approx_eq!((f64::consts::PI / 2f64).sin(), 1f64);
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assert_approx_eq!(0f32.cos(), 1f32);
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assert_approx_eq!((f64::consts::PI * 2f64).cos(), 1f64);
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assert_approx_eq!(25f32.powf(-2f32), 0.0016f32);
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assert_approx_eq!(400f64.powf(0.5f64), 20f64);
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assert_approx_eq!((1f32.exp() - f32::consts::E).abs(), 0f32);
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assert_approx_eq!(1f64.exp(), f64::consts::E);
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assert_approx_eq!(10f32.exp2(), 1024f32);
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assert_approx_eq!(50f64.exp2(), 1125899906842624f64);
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assert_approx_eq!((f32::consts::E.ln() - 1f32).abs(), 0f32);
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assert_approx_eq!(1f64.ln(), 0f64);
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assert_approx_eq!(10f32.log10(), 1f32);
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assert_approx_eq!(f64::consts::E.log10(), f64::consts::LOG10_E);
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assert_approx_eq!(8f32.log2(), 3f32);
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assert_approx_eq!(f64::consts::E.log2(), f64::consts::LOG2_E);
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assert_approx_eq!(3.0f32.mul_add(2.0f32, 5.0f32), 11.0);
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assert_eq!(0.0f32.mul_add(-2.0, f32::consts::E), f32::consts::E);
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assert_approx_eq!(3.0f64.mul_add(2.0, 5.0), 11.0);
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assert_eq!(0.0f64.mul_add(-2.0f64, f64::consts::E), f64::consts::E);
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assert_approx_eq!((-1.0f32).abs(), 1.0f32);
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assert_approx_eq!(34.2f64.abs(), 34.2f64);
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assert_approx_eq!(3.8f32.floor(), 3.0f32);
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assert_approx_eq!((-1.1f64).floor(), -2.0f64);
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assert_approx_eq!((-2.3f32).ceil(), -2.0f32);
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assert_approx_eq!(3.8f64.ceil(), 4.0f64);
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assert_approx_eq!(0.1f32.trunc(), 0.0f32);
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assert_approx_eq!((-0.1f64).trunc(), 0.0f64);
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}
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