rust/tests/ui/cast.rs

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// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
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#[warn(clippy::cast_precision_loss, clippy::cast_possible_truncation, clippy::cast_sign_loss, clippy::cast_possible_wrap, clippy::cast_lossless)]
#[allow(clippy::no_effect, clippy::unnecessary_operation)]
fn main() {
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// Test clippy::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;
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// Test clippy::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;
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// Test clippy::cast_possible_wrap
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1u8 as i8;
1u16 as i16;
1u32 as i32;
1u64 as i64;
1usize as isize;
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// Test clippy::cast_lossless with casts from floating-point types
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1.0f32 as f64;
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// Test clippy::cast_lossless with an expression wrapped in parens
(1u8 + 1u8) as u16;
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// Test clippy::cast_sign_loss
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1i32 as u32;
1isize as usize;
// Extra checks for *size
// 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;
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}