--- /dev/null
+// run-rustfix
+#![allow(unreachable_code)]
+#![allow(clippy::unnecessary_wraps)]
+
+fn some_func(a: Option<u32>) -> Option<u32> {
+ if a.is_none() {
+ return None;
+ }
+
+ 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> {
+ if (self.opt).is_none() {
+ return None;
+ }
+
+ if self.opt.is_none() {
+ return None
+ }
+
+ let _ = if self.opt.is_none() {
+ return None;
+ } else {
+ self.opt
+ };
+
+ let _ = if let Some(x) = self.opt {
+ x
+ } else {
+ return None;
+ };
+
+ self.opt
+ }
+}
+
+#[derive(Clone)]
+pub struct MoveStruct {
+ pub opt: Option<Vec<u32>>,
+}
+
+impl MoveStruct {
+ pub fn ref_func(&self) -> Option<Vec<u32>> {
+ if self.opt.is_none() {
+ return None;
+ }
+
+ self.opt.clone()
+ }
+
+ pub fn mov_func_reuse(self) -> Option<Vec<u32>> {
+ if self.opt.is_none() {
+ return None;
+ }
+
+ self.opt
+ }
+
+ pub fn mov_func_no_use(self) -> Option<Vec<u32>> {
+ if self.opt.is_none() {
+ return None;
+ }
+ Some(Vec::new())
+ }
+
+ pub fn if_let_ref_func(self) -> Option<Vec<u32>> {
+ let v: &Vec<_> = if let Some(ref v) = self.opt {
+ v
+ } else {
+ return None;
+ };
+
+ Some(v.clone())
+ }
+
+ pub fn if_let_mov_func(self) -> Option<Vec<u32>> {
+ let v = if let Some(v) = self.opt {
+ v
+ } else {
+ return None;
+ };
+
+ Some(v)
+ }
+}
+
+fn func() -> Option<i32> {
+ fn f() -> Option<String> {
+ Some(String::new())
+ }
+
+ if f().is_none() {
+ return None;
+ }
+
+ Some(0)
+}
+
+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();
+}