rust/tests/ui/redundant_pattern_matching.fixed
Aleksei Latyshev 69fe6b4c98
fix redundant_pattern_matching lint
- now it gives correct suggestion in case of macros
- better tests
- remove a couple of non-relevant tests
2020-04-25 23:51:30 +03:00

120 lines
2.0 KiB
Rust

// run-rustfix
#![warn(clippy::all)]
#![warn(clippy::redundant_pattern_matching)]
#![allow(clippy::unit_arg, unused_must_use, clippy::needless_bool, deprecated)]
fn main() {
if Ok::<i32, i32>(42).is_ok() {}
if Err::<i32, i32>(42).is_err() {}
if None::<()>.is_none() {}
if Some(42).is_some() {}
if Some(42).is_some() {
foo();
} else {
bar();
}
while Some(42).is_some() {}
while Some(42).is_none() {}
while None::<()>.is_none() {}
while Ok::<i32, i32>(10).is_ok() {}
while Ok::<i32, i32>(10).is_err() {}
let mut v = vec![1, 2, 3];
while v.pop().is_some() {
foo();
}
if Ok::<i32, i32>(42).is_ok() {}
if Err::<i32, i32>(42).is_err() {}
if None::<i32>.is_none() {}
if Some(42).is_some() {}
if let Ok(x) = Ok::<i32, i32>(42) {
println!("{}", x);
}
Ok::<i32, i32>(42).is_ok();
Ok::<i32, i32>(42).is_err();
Err::<i32, i32>(42).is_err();
Err::<i32, i32>(42).is_ok();
Some(42).is_some();
None::<()>.is_none();
let _ = None::<()>.is_none();
let _ = if Ok::<usize, ()>(4).is_ok() { true } else { false };
let opt = Some(false);
let x = if opt.is_some() { true } else { false };
takes_bool(x);
issue5504();
let _ = if gen_opt().is_some() {
1
} else if gen_opt().is_none() {
2
} else if gen_res().is_ok() {
3
} else if gen_res().is_err() {
4
} else {
5
};
}
fn gen_opt() -> Option<()> {
None
}
fn gen_res() -> Result<(), ()> {
Ok(())
}
fn takes_bool(_: bool) {}
fn foo() {}
fn bar() {}
macro_rules! m {
() => {
Some(42u32)
};
}
fn issue5504() {
fn result_opt() -> Result<Option<i32>, i32> {
Err(42)
}
fn try_result_opt() -> Result<i32, i32> {
while r#try!(result_opt()).is_some() {}
if r#try!(result_opt()).is_some() {}
Ok(42)
}
try_result_opt();
if m!().is_some() {}
while m!().is_some() {}
}