90 lines
2.1 KiB
Rust
90 lines
2.1 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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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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#![warn(clippy::float_cmp)]
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#![allow(unused, clippy::no_effect, clippy::unnecessary_operation, clippy::cast_lossless)]
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use std::ops::Add;
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const ZERO: f32 = 0.0;
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const ONE: f32 = ZERO + 1.0;
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fn twice<T>(x: T) -> T
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where
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T: Add<T, Output = T>,
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T: Copy,
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{
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x + x
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}
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fn eq_fl(x: f32, y: f32) -> bool {
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if x.is_nan() {
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y.is_nan()
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} else {
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x == y
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} // no error, inside "eq" fn
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}
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fn fl_eq(x: f32, y: f32) -> bool {
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if x.is_nan() {
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y.is_nan()
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} else {
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x == y
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} // no error, inside "eq" fn
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}
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struct X {
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val: f32,
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}
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impl PartialEq for X {
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fn eq(&self, o: &X) -> bool {
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if self.val.is_nan() {
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o.val.is_nan()
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} else {
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self.val == o.val // no error, inside "eq" fn
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}
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}
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}
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fn main() {
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ZERO == 0f32; //no error, comparison with zero is ok
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1.0f32 != ::std::f32::INFINITY; // also comparison with infinity
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1.0f32 != ::std::f32::NEG_INFINITY; // and negative infinity
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ZERO == 0.0; //no error, comparison with zero is ok
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ZERO + ZERO != 1.0; //no error, comparison with zero is ok
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ONE == 1f32;
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ONE == 1.0 + 0.0;
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ONE + ONE == ZERO + ONE + ONE;
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ONE != 2.0;
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ONE != 0.0; // no error, comparison with zero is ok
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twice(ONE) != ONE;
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ONE as f64 != 2.0;
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ONE as f64 != 0.0; // no error, comparison with zero is ok
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let x: f64 = 1.0;
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x == 1.0;
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x != 0f64; // no error, comparison with zero is ok
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twice(x) != twice(ONE as f64);
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x < 0.0; // no errors, lower or greater comparisons need no fuzzyness
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x > 0.0;
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x <= 0.0;
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x >= 0.0;
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let xs: [f32; 1] = [0.0];
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let a: *const f32 = xs.as_ptr();
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let b: *const f32 = xs.as_ptr();
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assert_eq!(a, b); // no errors
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}
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