74 lines
1.7 KiB
Rust
74 lines
1.7 KiB
Rust
// run-rustfix
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#![deny(clippy::useless_conversion)]
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#![allow(clippy::unnecessary_wrap)]
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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 test_issue_3913() -> Result<(), std::io::Error> {
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use std::fs;
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use std::path::Path;
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let path = Path::new(".");
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for _ in fs::read_dir(path)? {}
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Ok(())
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}
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fn test_issue_5833() -> Result<(), ()> {
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let text = "foo\r\nbar\n\nbaz\n";
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let lines = text.lines();
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if Some("ok") == lines.into_iter().next() {}
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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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test_issue_3913().unwrap();
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test_issue_5833().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::useless_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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// keep parenthesis around `a + b` for suggestion (see #4750)
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let a: i32 = 1;
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let b: i32 = 1;
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let _ = i32::from(a + b) * 3;
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}
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