rust/tests/ui/float_cmp_const.rs
2018-10-06 09:43:08 -07:00

56 lines
1.3 KiB
Rust

// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(tool_lints)]
#![warn(clippy::float_cmp_const)]
#![allow(clippy::float_cmp)]
#![allow(unused, clippy::no_effect, clippy::unnecessary_operation)]
const ONE: f32 = 1.0;
const TWO: f32 = 2.0;
fn eq_one(x: f32) -> bool {
if x.is_nan() { false } else { x == ONE } // no error, inside "eq" fn
}
fn main() {
// has errors
1f32 == ONE;
TWO == ONE;
TWO != ONE;
ONE + ONE == TWO;
1 as f32 == ONE;
let v = 0.9;
v == ONE;
v != ONE;
// no errors, lower than or greater than comparisons
v < ONE;
v > ONE;
v <= ONE;
v >= ONE;
// no errors, zero and infinity values
ONE != 0f32;
TWO == 0f32;
ONE != ::std::f32::INFINITY;
ONE == ::std::f32::NEG_INFINITY;
// no errors, but will warn clippy::float_cmp if '#![allow(float_cmp)]' above is removed
let w = 1.1;
v == w;
v != w;
v == 1.0;
v != 1.0;
}