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#![allow(
clippy::deref_addrof,
dead_code,
unused,
clippy::no_effect,
clippy::unnecessary_struct_initialization
)]
#![warn(clippy::unnecessary_operation)]
use std::fmt::Display;
use std::ops::Shl;
struct Tuple(i32);
struct Struct {
field: i32,
}
enum Enum {
Tuple(i32),
Struct { field: i32 },
}
struct DropStruct {
field: i32,
}
impl Drop for DropStruct {
fn drop(&mut self) {}
}
struct DropTuple(i32);
impl Drop for DropTuple {
fn drop(&mut self) {}
}
enum DropEnum {
Tuple(i32),
Struct { field: i32 },
}
impl Drop for DropEnum {
fn drop(&mut self) {}
}
struct FooString {
s: String,
}
fn get_number() -> i32 {
0
}
const fn get_usize() -> usize {
0
}
fn get_struct() -> Struct {
Struct { field: 0 }
}
fn get_drop_struct() -> DropStruct {
DropStruct { field: 0 }
}
struct Cout;
impl<T> Shl<T> for Cout
where
T: Display,
{
type Output = Self;
fn shl(self, rhs: T) -> Self::Output {
println!("{}", rhs);
self
}
}
fn main() {
get_number();
get_number();
get_struct();
get_number();
get_number();
5;get_number();
get_number();
get_number();
5;6;get_number();
get_number();
get_number();
5;get_number();
42;get_number();
assert!([42, 55].len() > get_usize());
42;get_number();
get_number();
assert!([42; 55].len() > get_usize());
get_number();
String::from("blah");
// Do not warn
DropTuple(get_number());
DropStruct { field: get_number() };
DropStruct { field: get_number() };
DropStruct { ..get_drop_struct() };
DropEnum::Tuple(get_number());
DropEnum::Struct { field: get_number() };
// Issue #9954
fn one() -> i8 {
1
}
macro_rules! use_expr {
($($e:expr),*) => {{ $($e;)* }}
}
use_expr!(isize::MIN / -(one() as isize), i8::MIN / -one());
// Issue #11885
Cout << 16;
// Issue #11575
// Bad formatting is required to trigger the bug
#[rustfmt::skip]
'label: {
break 'label
};
let () = const {
[42, 55][get_usize()];
};
}
const _: () = {
[42, 55][get_usize()];
};
const fn foo() {
assert!([42, 55].len() > get_usize());
//~^ ERROR: unnecessary operation
}
|
