64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// only-64bit
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#![warn(clippy::fn_to_numeric_cast, clippy::fn_to_numeric_cast_with_truncation)]
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fn foo() -> String {
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String::new()
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}
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fn test_function_to_numeric_cast() {
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let _ = foo as i8;
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let _ = foo as i16;
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let _ = foo as i32;
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let _ = foo as i64;
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let _ = foo as i128;
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let _ = foo as isize;
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let _ = foo as u8;
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let _ = foo as u16;
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let _ = foo as u32;
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let _ = foo as u64;
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let _ = foo as u128;
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// Casting to usize is OK and should not warn
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let _ = foo as usize;
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// Cast `f` (a `FnDef`) to `fn()` should not warn
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fn f() {}
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let _ = f as fn();
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}
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fn test_function_var_to_numeric_cast() {
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let abc: fn() -> String = foo;
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let _ = abc as i8;
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let _ = abc as i16;
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let _ = abc as i32;
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let _ = abc as i64;
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let _ = abc as i128;
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let _ = abc as isize;
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let _ = abc as u8;
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let _ = abc as u16;
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let _ = abc as u32;
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let _ = abc as u64;
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let _ = abc as u128;
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// Casting to usize is OK and should not warn
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let _ = abc as usize;
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}
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fn fn_with_fn_args(f: fn(i32) -> i32) -> i32 {
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f as i32
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}
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fn main() {}
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