[rustc.git] / src / tools / clippy / tests / ui / unnecessary_cast.rs

#![warn(clippy::unnecessary_cast)]
#![allow(clippy::no_effect)]

#[rustfmt::skip]
fn main() {
    // Test cast_unnecessary
    1i32 as i32;
    1f32 as f32;
    false as bool;
    &1i32 as &i32;

    -1_i32 as i32;
    - 1_i32 as i32;
    -1f32 as f32;
    1_i32 as i32;
    1_f32 as f32;

    // macro version
    macro_rules! foo {
        ($a:ident, $b:ident) => {
            #[allow(unused)]
            pub fn $a() -> $b {
                1 as $b
            }
        };
    }
    foo!(a, i32);
    foo!(b, f32);
    foo!(c, f64);

    // do not lint cast to cfg-dependant type
    1 as std::os::raw::c_char;

    // do not lint cast to alias type
    1 as I32Alias;
    &1 as &I32Alias;
}

type I32Alias = i32;
Commit	Line	Data
f20569fa XL	1	#![warn(clippy::unnecessary_cast)]
	2	#![allow(clippy::no_effect)]
	3
5099ac24	4	#[rustfmt::skip]
f20569fa XL	5	fn main() {
	6	// Test cast_unnecessary
	7	1i32 as i32;
	8	1f32 as f32;
	9	false as bool;
	10	&1i32 as &i32;
	11
5099ac24 FG	12	-1_i32 as i32;
	13	- 1_i32 as i32;
	14	-1f32 as f32;
	15	1_i32 as i32;
	16	1_f32 as f32;
	17
f20569fa XL	18	// macro version
	19	macro_rules! foo {
	20	($a:ident, $b:ident) => {
	21	#[allow(unused)]
	22	pub fn $a() -> $b {
	23	1 as $b
	24	}
	25	};
	26	}
	27	foo!(a, i32);
	28	foo!(b, f32);
	29	foo!(c, f64);
	30
	31	// do not lint cast to cfg-dependant type
	32	1 as std::os::raw::c_char;
04454e1e FG	33
	34	// do not lint cast to alias type
	35	1 as I32Alias;
	36	&1 as &I32Alias;
f20569fa	37	}
04454e1e FG	38
04454e1e FG	39	type I32Alias = i32;