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41 lines
887 B
Rust
41 lines
887 B
Rust
#![deny(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(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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}
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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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}
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