1 #![deny(clippy::useless_conversion)]
3 use std::convert::{TryFrom, TryInto};
5 fn test_generic<T: Copy>(val: T) -> T {
6 let _ = T::try_from(val).unwrap();
7 val.try_into().unwrap()
10 fn test_generic2<T: Copy + Into<i32> + Into<U>, U: From<T>>(val: T) {
12 let _: i32 = val.try_into().unwrap();
13 let _: U = val.try_into().unwrap();
14 let _ = U::try_from(val).unwrap();
19 test_generic2::<i32, i32>(10i32);
21 let _: String = "foo".try_into().unwrap();
22 let _: String = TryFrom::try_from("foo").unwrap();
23 let _ = String::try_from("foo").unwrap();
24 #[allow(clippy::useless_conversion)]
26 let _ = String::try_from("foo").unwrap();
27 let _: String = "foo".try_into().unwrap();
29 let _: String = "foo".to_string().try_into().unwrap();
30 let _: String = TryFrom::try_from("foo".to_string()).unwrap();
31 let _ = String::try_from("foo".to_string()).unwrap();
32 let _ = String::try_from(format!("A: {:04}", 123)).unwrap();
33 let _: String = format!("Hello {}", "world").try_into().unwrap();
34 let _: String = "".to_owned().try_into().unwrap();
35 let _: String = match String::from("_").try_into() {
39 // FIXME this is a false negative
40 #[allow(clippy::cmp_owned)]
41 if String::from("a") == TryInto::<String>::try_into(String::from("a")).unwrap() {}