58 lines
1.5 KiB
Rust
58 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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#![deny(clippy::identity_conversion)]
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fn test_generic<T: Copy>(val: T) -> T {
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let _ = T::from(val);
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val.into()
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}
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fn test_generic2<T: Copy + Into<i32> + Into<U>, U: From<T>>(val: T) {
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// ok
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let _: i32 = val.into();
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let _: U = val.into();
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let _ = U::from(val);
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}
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fn test_questionmark() -> Result<(), ()> {
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{
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let _: i32 = 0i32.into();
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Ok(Ok(()))
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}??;
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Ok(())
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}
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fn main() {
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test_generic(10i32);
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test_generic2::<i32, i32>(10i32);
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test_questionmark().unwrap();
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let _: String = "foo".into();
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let _: String = From::from("foo");
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let _ = String::from("foo");
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#[allow(clippy::identity_conversion)]
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{
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let _: String = "foo".into();
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let _ = String::from("foo");
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let _ = "".lines().into_iter();
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}
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let _: String = "foo".to_string().into();
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let _: String = From::from("foo".to_string());
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let _ = String::from("foo".to_string());
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let _ = String::from(format!("A: {:04}", 123));
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let _ = "".lines().into_iter();
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let _ = vec![1, 2, 3].into_iter().into_iter();
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let _: String = format!("Hello {}", "world").into();
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}
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