mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-14 00:47:16 +00:00
1c27ba931b
Also stabilizes saturating_int_assign_impl, gh-92354. And also make pub fns const where the underlying saturating_* fns became const in the meantime since the Saturating type was created.
524 lines
11 KiB
Rust
524 lines
11 KiB
Rust
//@aux-build:proc_macro_derive.rs
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#![allow(
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clippy::assign_op_pattern,
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clippy::erasing_op,
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clippy::identity_op,
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clippy::no_effect,
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clippy::op_ref,
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clippy::unnecessary_owned_empty_strings,
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arithmetic_overflow,
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unconditional_panic
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)]
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#![feature(const_mut_refs, inline_const)]
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#![warn(clippy::arithmetic_side_effects)]
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extern crate proc_macro_derive;
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use core::num::{NonZeroUsize, Saturating, Wrapping};
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const ONE: i32 = 1;
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const ZERO: i32 = 0;
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#[derive(Clone, Copy)]
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pub struct Custom;
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#[derive(proc_macro_derive::ShadowDerive)]
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pub struct Nothing;
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macro_rules! impl_arith {
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( $( $_trait:ident, $lhs:ty, $rhs:ty, $method:ident; )* ) => {
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$(
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impl core::ops::$_trait<$lhs> for $rhs {
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type Output = Custom;
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fn $method(self, _: $lhs) -> Self::Output { todo!() }
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}
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)*
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}
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}
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macro_rules! impl_assign_arith {
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( $( $_trait:ident, $lhs:ty, $rhs:ty, $method:ident; )* ) => {
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$(
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impl core::ops::$_trait<$lhs> for $rhs {
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fn $method(&mut self, _: $lhs) {}
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}
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)*
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}
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}
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impl_arith!(
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Add, Custom, Custom, add;
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Div, Custom, Custom, div;
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Mul, Custom, Custom, mul;
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Rem, Custom, Custom, rem;
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Shl, Custom, Custom, shl;
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Shr, Custom, Custom, shr;
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Sub, Custom, Custom, sub;
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Add, Custom, &Custom, add;
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Div, Custom, &Custom, div;
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Mul, Custom, &Custom, mul;
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Rem, Custom, &Custom, rem;
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Shl, Custom, &Custom, shl;
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Shr, Custom, &Custom, shr;
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Sub, Custom, &Custom, sub;
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Add, &Custom, Custom, add;
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Div, &Custom, Custom, div;
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Mul, &Custom, Custom, mul;
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Rem, &Custom, Custom, rem;
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Shl, &Custom, Custom, shl;
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Shr, &Custom, Custom, shr;
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Sub, &Custom, Custom, sub;
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Add, &Custom, &Custom, add;
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Div, &Custom, &Custom, div;
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Mul, &Custom, &Custom, mul;
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Rem, &Custom, &Custom, rem;
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Shl, &Custom, &Custom, shl;
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Shr, &Custom, &Custom, shr;
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Sub, &Custom, &Custom, sub;
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);
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impl_assign_arith!(
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AddAssign, Custom, Custom, add_assign;
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DivAssign, Custom, Custom, div_assign;
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MulAssign, Custom, Custom, mul_assign;
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RemAssign, Custom, Custom, rem_assign;
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ShlAssign, Custom, Custom, shl_assign;
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ShrAssign, Custom, Custom, shr_assign;
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SubAssign, Custom, Custom, sub_assign;
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AddAssign, Custom, &Custom, add_assign;
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DivAssign, Custom, &Custom, div_assign;
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MulAssign, Custom, &Custom, mul_assign;
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RemAssign, Custom, &Custom, rem_assign;
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ShlAssign, Custom, &Custom, shl_assign;
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ShrAssign, Custom, &Custom, shr_assign;
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SubAssign, Custom, &Custom, sub_assign;
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AddAssign, &Custom, Custom, add_assign;
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DivAssign, &Custom, Custom, div_assign;
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MulAssign, &Custom, Custom, mul_assign;
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RemAssign, &Custom, Custom, rem_assign;
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ShlAssign, &Custom, Custom, shl_assign;
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ShrAssign, &Custom, Custom, shr_assign;
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SubAssign, &Custom, Custom, sub_assign;
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AddAssign, &Custom, &Custom, add_assign;
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DivAssign, &Custom, &Custom, div_assign;
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MulAssign, &Custom, &Custom, mul_assign;
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RemAssign, &Custom, &Custom, rem_assign;
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ShlAssign, &Custom, &Custom, shl_assign;
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ShrAssign, &Custom, &Custom, shr_assign;
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SubAssign, &Custom, &Custom, sub_assign;
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);
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impl core::ops::Neg for Custom {
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type Output = Custom;
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fn neg(self) -> Self::Output {
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todo!()
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}
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}
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impl core::ops::Neg for &Custom {
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type Output = Custom;
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fn neg(self) -> Self::Output {
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todo!()
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}
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}
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pub fn association_with_structures_should_not_trigger_the_lint() {
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enum Foo {
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Bar = -2,
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}
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impl Trait for Foo {
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const ASSOC: i32 = {
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let _: [i32; 1 + 1];
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fn foo() {}
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1 + 1
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};
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}
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struct Baz([i32; 1 + 1]);
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trait Trait {
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const ASSOC: i32 = 1 + 1;
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}
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type Alias = [i32; 1 + 1];
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union Qux {
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field: [i32; 1 + 1],
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}
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let _: [i32; 1 + 1] = [0, 0];
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let _: [i32; 1 + 1] = {
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let a: [i32; 1 + 1] = [0, 0];
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a
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};
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}
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pub fn hard_coded_allowed() {
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let _ = 1f32 + 1f32;
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let _ = 1f64 + 1f64;
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let _ = Saturating(0u32) + Saturating(0u32);
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let _ = String::new() + "";
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let _ = Wrapping(0u32) + Wrapping(0u32);
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let saturating: Saturating<u32> = Saturating(0u32);
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let string: String = String::new();
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let wrapping: Wrapping<u32> = Wrapping(0u32);
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let inferred_saturating = saturating + saturating;
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let inferred_string = string + "";
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let inferred_wrapping = wrapping + wrapping;
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let _ = inferred_saturating + inferred_saturating;
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let _ = inferred_string + "";
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let _ = inferred_wrapping + inferred_wrapping;
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}
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#[rustfmt::skip]
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pub fn const_ops_should_not_trigger_the_lint() {
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const _: i32 = { let mut n = 1; n += 1; n };
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let _ = const { let mut n = 1; n += 1; n };
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const _: i32 = { let mut n = 1; n = n + 1; n };
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let _ = const { let mut n = 1; n = n + 1; n };
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const _: i32 = { let mut n = 1; n = 1 + n; n };
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let _ = const { let mut n = 1; n = 1 + n; n };
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const _: i32 = 1 + 1;
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let _ = const { 1 + 1 };
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const _: i32 = { let mut n = 1; n = -1; n = -(-1); n = -n; n };
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let _ = const { let mut n = 1; n = -1; n = -(-1); n = -n; n };
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}
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pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_trigger_the_lint() {
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let mut _n = i32::MAX;
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// Assign
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_n += 0;
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_n += &0;
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_n -= 0;
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_n -= &0;
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_n += ZERO;
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_n += &ZERO;
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_n -= ZERO;
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_n -= &ZERO;
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_n /= 99;
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_n /= &99;
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_n %= 99;
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_n %= &99;
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_n *= 0;
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_n *= &0;
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_n *= 1;
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_n *= &1;
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_n *= ZERO;
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_n *= &ZERO;
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_n *= ONE;
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_n *= &ONE;
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_n += -0;
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_n += &-0;
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_n -= -0;
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_n -= &-0;
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_n += -ZERO;
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_n += &-ZERO;
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_n -= -ZERO;
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_n -= &-ZERO;
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_n /= -99;
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_n /= &-99;
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_n %= -99;
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_n %= &-99;
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_n *= -0;
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_n *= &-0;
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_n *= -1;
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_n *= &-1;
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// Binary
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_n = _n + 0;
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_n = _n + &0;
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_n = 0 + _n;
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_n = &0 + _n;
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_n = _n + ZERO;
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_n = _n + &ZERO;
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_n = ZERO + _n;
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_n = &ZERO + _n;
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_n = _n - 0;
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_n = _n - &0;
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_n = 0 - _n;
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_n = &0 - _n;
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_n = _n - ZERO;
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_n = _n - &ZERO;
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_n = ZERO - _n;
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_n = &ZERO - _n;
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_n = _n / 99;
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_n = _n / &99;
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_n = _n % 99;
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_n = _n % &99;
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_n = _n * 0;
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_n = _n * &0;
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_n = 0 * _n;
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_n = &0 * _n;
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_n = _n * 1;
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_n = _n * &1;
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_n = ZERO * _n;
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_n = &ZERO * _n;
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_n = _n * ONE;
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_n = _n * &ONE;
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_n = 1 * _n;
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_n = &1 * _n;
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_n = 23 + 85;
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// Method
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_n.saturating_div(1);
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_n.wrapping_div(1);
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_n.wrapping_rem(1);
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_n.wrapping_rem_euclid(1);
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_n.saturating_div(1);
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_n.checked_div(1);
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_n.checked_rem(1);
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_n.checked_rem_euclid(1);
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// Unary
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_n = -2147483647;
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_n = -i32::MAX;
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_n = -i32::MIN;
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_n = -&2147483647;
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_n = -&i32::MAX;
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_n = -&i32::MIN;
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}
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pub fn unknown_ops_or_runtime_ops_that_can_overflow() {
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let mut _n = i32::MAX;
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let mut _custom = Custom;
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// Assign
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_n += 1;
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_n += &1;
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_n -= 1;
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_n -= &1;
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_n /= 0;
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_n /= &0;
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_n %= 0;
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_n %= &0;
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_n *= 2;
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_n *= &2;
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_n += -1;
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_n += &-1;
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_n -= -1;
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_n -= &-1;
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_n /= -0;
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_n /= &-0;
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_n %= -0;
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_n %= &-0;
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_n *= -2;
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_n *= &-2;
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_custom += Custom;
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_custom += &Custom;
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_custom -= Custom;
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_custom -= &Custom;
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_custom /= Custom;
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_custom /= &Custom;
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_custom %= Custom;
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_custom %= &Custom;
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_custom *= Custom;
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_custom *= &Custom;
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_custom >>= Custom;
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_custom >>= &Custom;
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_custom <<= Custom;
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_custom <<= &Custom;
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_custom += -Custom;
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_custom += &-Custom;
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_custom -= -Custom;
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_custom -= &-Custom;
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_custom /= -Custom;
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_custom /= &-Custom;
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_custom %= -Custom;
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_custom %= &-Custom;
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_custom *= -Custom;
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_custom *= &-Custom;
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_custom >>= -Custom;
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_custom >>= &-Custom;
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_custom <<= -Custom;
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_custom <<= &-Custom;
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// Binary
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_n = _n + 1;
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_n = _n + &1;
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_n = 1 + _n;
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_n = &1 + _n;
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_n = _n - 1;
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_n = _n - &1;
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_n = 1 - _n;
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_n = &1 - _n;
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_n = _n / 0;
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_n = _n / &0;
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_n = _n % 0;
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_n = _n % &0;
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_n = _n * 2;
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_n = _n * &2;
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_n = 2 * _n;
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_n = &2 * _n;
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_n = 23 + &85;
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_n = &23 + 85;
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_n = &23 + &85;
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_custom = _custom + _custom;
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_custom = _custom + &_custom;
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_custom = Custom + _custom;
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_custom = &Custom + _custom;
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_custom = _custom - Custom;
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_custom = _custom - &Custom;
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_custom = Custom - _custom;
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_custom = &Custom - _custom;
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_custom = _custom / Custom;
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_custom = _custom / &Custom;
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_custom = _custom % Custom;
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_custom = _custom % &Custom;
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_custom = _custom * Custom;
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_custom = _custom * &Custom;
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_custom = Custom * _custom;
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_custom = &Custom * _custom;
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_custom = Custom + &Custom;
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_custom = &Custom + Custom;
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_custom = &Custom + &Custom;
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_custom = _custom >> _custom;
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_custom = _custom >> &_custom;
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_custom = Custom << _custom;
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_custom = &Custom << _custom;
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// Method
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_n.saturating_div(0);
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_n.wrapping_div(0);
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_n.wrapping_rem(0);
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_n.wrapping_rem_euclid(0);
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_n.saturating_div(_n);
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_n.wrapping_div(_n);
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_n.wrapping_rem(_n);
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_n.wrapping_rem_euclid(_n);
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// Unary
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_n = -_n;
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_n = -&_n;
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_custom = -_custom;
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_custom = -&_custom;
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}
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// Copied and pasted from the `integer_arithmetic` lint for comparison.
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pub fn integer_arithmetic() {
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let mut i = 1i32;
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let mut var1 = 0i32;
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let mut var2 = -1i32;
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1 + i;
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i * 2;
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1 % i / 2;
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i - 2 + 2 - i;
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-i;
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i >> 1;
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i << 1;
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-1;
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-(-1);
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i & 1;
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i | 1;
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i ^ 1;
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i += 1;
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i -= 1;
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i *= 2;
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i /= 2;
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i /= 0;
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i /= -1;
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i /= var1;
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i /= var2;
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i %= 2;
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i %= 0;
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i %= -1;
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i %= var1;
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i %= var2;
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i <<= 3;
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i >>= 2;
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i |= 1;
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i &= 1;
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i ^= i;
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}
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pub fn issue_10583(a: u16) -> u16 {
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10 / a
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}
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pub fn issue_10767() {
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let n = &1.0;
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n + n;
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3.1_f32 + &1.2_f32;
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&3.4_f32 + 1.5_f32;
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&3.5_f32 + &1.3_f32;
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}
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pub fn issue_10792() {
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struct One {
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a: u32,
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}
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struct Two {
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b: u32,
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c: u64,
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}
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const ONE: One = One { a: 1 };
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const TWO: Two = Two { b: 2, c: 3 };
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let _ = 10 / ONE.a;
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let _ = 10 / TWO.b;
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let _ = 10 / TWO.c;
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}
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pub fn issue_11145() {
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let mut x: Wrapping<u32> = Wrapping(0_u32);
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x += 1;
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}
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pub fn issue_11262() {
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let one = 1;
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let zero = 0;
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let _ = 2 / one;
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let _ = 2 / zero;
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}
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pub fn issue_11392() {
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fn example_div(unsigned: usize, nonzero_unsigned: NonZeroUsize) -> usize {
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unsigned / nonzero_unsigned
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}
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fn example_rem(unsigned: usize, nonzero_unsigned: NonZeroUsize) -> usize {
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unsigned % nonzero_unsigned
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}
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let (unsigned, nonzero_unsigned) = (0, NonZeroUsize::new(1).unwrap());
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example_div(unsigned, nonzero_unsigned);
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example_rem(unsigned, nonzero_unsigned);
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}
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pub fn issue_11393() {
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fn example_div(x: Wrapping<i32>, maybe_zero: Wrapping<i32>) -> Wrapping<i32> {
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x / maybe_zero
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}
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fn example_rem(x: Wrapping<i32>, maybe_zero: Wrapping<i32>) -> Wrapping<i32> {
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x % maybe_zero
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}
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let [x, maybe_zero] = [1, 0].map(Wrapping);
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example_div(x, maybe_zero);
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example_rem(x, maybe_zero);
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}
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fn main() {}
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