161 lines
2.7 KiB
Rust
161 lines
2.7 KiB
Rust
// run-rustfix
|
|
#![allow(unreachable_code)]
|
|
#![allow(clippy::unnecessary_wraps)]
|
|
|
|
fn some_func(a: Option<u32>) -> Option<u32> {
|
|
a?;
|
|
|
|
a
|
|
}
|
|
|
|
fn some_other_func(a: Option<u32>) -> Option<u32> {
|
|
if a.is_none() {
|
|
return None;
|
|
} else {
|
|
return Some(0);
|
|
}
|
|
unreachable!()
|
|
}
|
|
|
|
pub enum SeemsOption<T> {
|
|
Some(T),
|
|
None,
|
|
}
|
|
|
|
impl<T> SeemsOption<T> {
|
|
pub fn is_none(&self) -> bool {
|
|
match *self {
|
|
SeemsOption::None => true,
|
|
SeemsOption::Some(_) => false,
|
|
}
|
|
}
|
|
}
|
|
|
|
fn returns_something_similar_to_option(a: SeemsOption<u32>) -> SeemsOption<u32> {
|
|
if a.is_none() {
|
|
return SeemsOption::None;
|
|
}
|
|
|
|
a
|
|
}
|
|
|
|
pub struct CopyStruct {
|
|
pub opt: Option<u32>,
|
|
}
|
|
|
|
impl CopyStruct {
|
|
#[rustfmt::skip]
|
|
pub fn func(&self) -> Option<u32> {
|
|
(self.opt)?;
|
|
|
|
self.opt?;
|
|
|
|
let _ = Some(self.opt?);
|
|
|
|
let _ = self.opt?;
|
|
|
|
self.opt
|
|
}
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
pub struct MoveStruct {
|
|
pub opt: Option<Vec<u32>>,
|
|
}
|
|
|
|
impl MoveStruct {
|
|
pub fn ref_func(&self) -> Option<Vec<u32>> {
|
|
self.opt.as_ref()?;
|
|
|
|
self.opt.clone()
|
|
}
|
|
|
|
pub fn mov_func_reuse(self) -> Option<Vec<u32>> {
|
|
self.opt.as_ref()?;
|
|
|
|
self.opt
|
|
}
|
|
|
|
pub fn mov_func_no_use(self) -> Option<Vec<u32>> {
|
|
self.opt.as_ref()?;
|
|
Some(Vec::new())
|
|
}
|
|
|
|
pub fn if_let_ref_func(self) -> Option<Vec<u32>> {
|
|
let v: &Vec<_> = self.opt.as_ref()?;
|
|
|
|
Some(v.clone())
|
|
}
|
|
|
|
pub fn if_let_mov_func(self) -> Option<Vec<u32>> {
|
|
let v = self.opt?;
|
|
|
|
Some(v)
|
|
}
|
|
}
|
|
|
|
fn func() -> Option<i32> {
|
|
fn f() -> Option<String> {
|
|
Some(String::new())
|
|
}
|
|
|
|
f()?;
|
|
|
|
Some(0)
|
|
}
|
|
|
|
fn func_returning_result() -> Result<i32, i32> {
|
|
Ok(1)
|
|
}
|
|
|
|
fn result_func(x: Result<i32, i32>) -> Result<i32, i32> {
|
|
let _ = x?;
|
|
|
|
x?;
|
|
|
|
// No warning
|
|
let y = if let Ok(x) = x {
|
|
x
|
|
} else {
|
|
return Err(0);
|
|
};
|
|
|
|
// issue #7859
|
|
// no warning
|
|
let _ = if let Ok(x) = func_returning_result() {
|
|
x
|
|
} else {
|
|
return Err(0);
|
|
};
|
|
|
|
// no warning
|
|
if func_returning_result().is_err() {
|
|
return func_returning_result();
|
|
}
|
|
|
|
Ok(y)
|
|
}
|
|
|
|
fn main() {
|
|
some_func(Some(42));
|
|
some_func(None);
|
|
some_other_func(Some(42));
|
|
|
|
let copy_struct = CopyStruct { opt: Some(54) };
|
|
copy_struct.func();
|
|
|
|
let move_struct = MoveStruct {
|
|
opt: Some(vec![42, 1337]),
|
|
};
|
|
move_struct.ref_func();
|
|
move_struct.clone().mov_func_reuse();
|
|
move_struct.mov_func_no_use();
|
|
|
|
let so = SeemsOption::Some(45);
|
|
returns_something_similar_to_option(so);
|
|
|
|
func();
|
|
|
|
let _ = result_func(Ok(42));
|
|
}
|