rust/tests/ui/absurd-extreme-comparisons.rs
2018-10-11 12:16:22 +02:00

68 lines
1.6 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.
#![warn(clippy::absurd_extreme_comparisons)]
#![allow(unused, clippy::eq_op, clippy::no_effect, clippy::unnecessary_operation, clippy::needless_pass_by_value)]
fn main() {
const Z: u32 = 0;
let u: u32 = 42;
u <= 0;
u <= Z;
u < Z;
Z >= u;
Z > u;
u > std::u32::MAX;
u >= std::u32::MAX;
std::u32::MAX < u;
std::u32::MAX <= u;
1-1 > u;
u >= !0;
u <= 12 - 2*6;
let i: i8 = 0;
i < -127 - 1;
std::i8::MAX >= i;
3-7 < std::i32::MIN;
let b = false;
b >= true;
false > b;
u > 0; // ok
// this is handled by clippy::unit_cmp
() < {};
}
use std::cmp::{Ordering, PartialEq, PartialOrd};
#[derive(PartialEq, PartialOrd)]
pub struct U(u64);
impl PartialEq<u32> for U {
fn eq(&self, other: &u32) -> bool {
self.eq(&U(u64::from(*other)))
}
}
impl PartialOrd<u32> for U {
fn partial_cmp(&self, other: &u32) -> Option<Ordering> {
self.partial_cmp(&U(u64::from(*other)))
}
}
pub fn foo(val: U) -> bool {
val > std::u32::MAX
}
pub fn bar(len: u64) -> bool {
// This is OK as we are casting from target sized to fixed size
len >= std::usize::MAX as u64
}