26 lines
708 B
Rust
26 lines
708 B
Rust
|
#![deny(clippy::useless_conversion)]
|
||
|
|
|
||
|
|
use std::convert::TryFrom;
|
||
|
|
|
||
|
|
fn test_generic<T: Copy>(val: T) -> T {
|
||
|
|
T::try_from(val).unwrap()
|
||
|
|
}
|
||
|
|
|
||
|
|
fn test_generic2<T: Copy + Into<i32> + Into<U>, U: From<T>>(val: T) {
|
||
|
|
let _ = U::try_from(val).unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
test_generic(10i32);
|
||
|
|
test_generic2::<i32, i32>(10i32);
|
||
|
|
|
||
|
|
let _: String = TryFrom::try_from("foo").unwrap();
|
||
|
|
let _ = String::try_from("foo").unwrap();
|
||
|
|
#[allow(clippy::useless_conversion)]
|
||
|
|
let _ = String::try_from("foo").unwrap();
|
||
|
|
|
||
|
|
let _: String = TryFrom::try_from("foo".to_string()).unwrap();
|
||
|
|
let _ = String::try_from("foo".to_string()).unwrap();
|
||
|
|
let _ = String::try_from(format!("A: {:04}", 123)).unwrap();
|
||
|
|
}
|