rust/tests/ui/cast.rs
2017-08-28 08:42:33 -07:00

94 lines
1.9 KiB
Rust

#![feature(plugin)]
#![plugin(clippy)]
#[warn(cast_precision_loss, cast_possible_truncation, cast_sign_loss, cast_possible_wrap, cast_lossless)]
#[allow(no_effect, unnecessary_operation)]
fn main() {
// Test cast_precision_loss
1i32 as f32;
1i64 as f32;
1i64 as f64;
1u32 as f32;
1u64 as f32;
1u64 as f64;
// Test cast_possible_truncation
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
1u8 as i8;
1u16 as i16;
1u32 as i32;
1u64 as i64;
1usize as isize;
// Test cast_lossless with casts to integer types
1i8 as i16;
1i8 as i32;
1i8 as i64;
1u8 as i16;
1u8 as i32;
1u8 as i64;
1u8 as u16;
1u8 as u32;
1u8 as u64;
1i16 as i32;
1i16 as i64;
1u16 as i32;
1u16 as i64;
1u16 as u32;
1u16 as u64;
1i32 as i64;
1u32 as i64;
1u32 as u64;
// Test cast_lossless with casts to floating-point types
1i8 as f32;
1i8 as f64;
1u8 as f32;
1u8 as f64;
1i16 as f32;
1i16 as f64;
1u16 as f32;
1u16 as f64;
1i32 as f64;
1u32 as f64;
// Test cast_lossless with casts from floating-point types
1.0f32 as f64;
// Test cast_sign_loss
1i32 as u32;
1isize as usize;
// Extra checks for *size
// Casting from *size
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
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
1i32 as usize;
// Test cast_unnecessary
1i32 as i32;
1f32 as f32;
false as bool;
&1i32 as &i32;
// Should not trigger
let v = vec!(1);
&v as &[i32];
1.0 as f64;
1 as u64;
}