rust/tests/ui/cast.rs

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#![feature(plugin)]
#![plugin(clippy)]
#[deny(cast_precision_loss, cast_possible_truncation, cast_sign_loss, cast_possible_wrap)]
#[allow(no_effect, unnecessary_operation)]
fn main() {
// Test cast_precision_loss
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1i32 as f32;
1i64 as f32;
1i64 as f64;
1u32 as f32;
1u64 as f32;
1u64 as f64;
1i32 as f64; // Should not trigger the lint
1u32 as f64; // Should not trigger the lint
// Test cast_possible_truncation
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1f32 as i32;
1f32 as u32;
1f64 as f32;
1i32 as i8;
1i32 as u8;
1f64 as isize;
1f64 as usize;
// Test cast_possible_wrap
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1u8 as i8;
1u16 as i16;
1u32 as i32;
1u64 as i64;
1usize as isize;
// Test cast_sign_loss
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1i32 as u32;
1isize as usize;
// Extra checks for *size
// Casting from *size
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1isize as i8;
1isize as f64;
1usize as f64;
1isize as f32;
1usize as f32;
1isize as i32;
1isize as u32;
1usize as u32;
1usize as i32;
// Casting to *size
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1i64 as isize;
1i64 as usize;
1u64 as isize;
1u64 as usize;
1u32 as isize;
1u32 as usize; // Should not trigger any lint
1i32 as isize; // Neither should this
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1i32 as usize;
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}