48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
// Copyright 2012 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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#[forbid(deprecated_mode)];
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/// Additional general-purpose comparison functionality.
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use core::f32;
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use core::f64;
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use core::float;
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const fuzzy_epsilon: float = 1.0e-6;
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pub trait FuzzyEq {
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pure fn fuzzy_eq(other: &self) -> bool;
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}
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impl float: FuzzyEq {
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pure fn fuzzy_eq(other: &float) -> bool {
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return float::abs(self - *other) < fuzzy_epsilon;
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}
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}
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impl f32: FuzzyEq {
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pure fn fuzzy_eq(other: &f32) -> bool {
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return f32::abs(self - *other) < (fuzzy_epsilon as f32);
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}
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}
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impl f64: FuzzyEq {
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pure fn fuzzy_eq(other: &f64) -> bool {
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return f64::abs(self - *other) < (fuzzy_epsilon as f64);
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}
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}
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#[test]
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fn test_fuzzy_equals() {
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assert ((&1.0).fuzzy_eq(&1.0));
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assert ((&1.0f32).fuzzy_eq(&1.0f32));
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assert ((&1.0f64).fuzzy_eq(&1.0f64));
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}
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