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rust-clippy/tests/ui/option_if_let_else.stderr

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error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:10:5
|
LL | / if let Some(x) = string {
LL | | (true, x)
LL | | } else {
LL | | (false, "hello")
LL | | }
| |_____^ help: try: `string.map_or((false, "hello"), |x| (true, x))`
|
= note: `-D clippy::option-if-let-else` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::option_if_let_else)]`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:28:13
|
LL | let _ = if let Some(s) = *string { s.len() } else { 0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `string.map_or(0, |s| s.len())`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:29:13
|
LL | let _ = if let Some(s) = &num { s } else { &0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `num.as_ref().map_or(&0, |s| s)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:30:13
|
LL | let _ = if let Some(s) = &mut num {
| _____________^
LL | | *s += 1;
LL | | s
LL | | } else {
LL | | &0
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = num.as_mut().map_or(&0, |s| {
LL + *s += 1;
LL + s
LL ~ });
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:36:13
|
LL | let _ = if let Some(ref s) = num { s } else { &0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `num.as_ref().map_or(&0, |s| s)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:37:13
|
LL | let _ = if let Some(mut s) = num {
| _____________^
LL | | s += 1;
LL | | s
LL | | } else {
LL | | 0
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = num.map_or(0, |mut s| {
LL + s += 1;
LL + s
LL ~ });
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:43:13
|
LL | let _ = if let Some(ref mut s) = num {
| _____________^
LL | | *s += 1;
LL | | s
LL | | } else {
LL | | &0
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = num.as_mut().map_or(&0, |s| {
LL + *s += 1;
LL + s
LL ~ });
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:52:5
|
LL | / if let Some(x) = arg {
LL | | let y = x * x;
LL | | y * y
LL | | } else {
LL | | 13
LL | | }
| |_____^
|
help: try
|
LL ~ arg.map_or(13, |x| {
LL + let y = x * x;
LL + y * y
LL + })
|
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:65:13
|
LL | let _ = if let Some(x) = arg {
| _____________^
LL | | x
LL | | } else {
LL | | // map_or_else must be suggested
LL | | side_effect()
LL | | };
| |_____^ help: try: `arg.map_or_else(side_effect, |x| x)`
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:74:13
|
LL | let _ = if let Some(x) = arg {
| _____________^
LL | | x * x * x * x
LL | | } else {
LL | | let mut y = 1;
... |
LL | | y
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = arg.map_or_else(|| {
LL + let mut y = 1;
LL + y = (y + 2 / y) / 2;
LL + y = (y + 2 / y) / 2;
LL + y
LL ~ }, |x| x * x * x * x);
|
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:107:13
|
LL | / if let Some(idx) = s.find('.') {
LL | | vec![s[..idx].to_string(), s[idx..].to_string()]
LL | | } else {
LL | | vec![s.to_string()]
LL | | }
| |_____________^ help: try: `s.find('.').map_or_else(|| vec![s.to_string()], |idx| vec![s[..idx].to_string(), s[idx..].to_string()])`
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:118:5
|
LL | / if let Ok(binding) = variable {
LL | | println!("Ok {binding}");
LL | | true
LL | | } else {
LL | | println!("Err");
LL | | false
LL | | }
| |_____^
|
help: try
|
LL ~ variable.map_or_else(|_| {
LL + println!("Err");
LL + false
LL + }, |binding| {
LL + println!("Ok {binding}");
LL + true
LL + })
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:142:13
|
LL | let _ = if let Some(x) = optional { x + 2 } else { 5 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `optional.map_or(5, |x| x + 2)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:152:13
|
LL | let _ = if let Some(x) = Some(0) {
| _____________^
LL | | loop {
LL | | if x == 0 {
LL | | break x;
... |
LL | | 0
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = Some(0).map_or(0, |x| loop {
LL + if x == 0 {
LL + break x;
LL + }
LL ~ });
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:180:13
|
LL | let _ = if let Some(x) = Some(0) { s.len() + x } else { s.len() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Some(0).map_or(s.len(), |x| s.len() + x)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:184:13
|
LL | let _ = if let Some(x) = Some(0) {
| _____________^
LL | | let s = s;
LL | | s.len() + x
LL | | } else {
LL | | 1
LL | | };
| |_____^
|
help: try
|
LL ~ let _ = Some(0).map_or(1, |x| {
LL + let s = s;
LL + s.len() + x
LL ~ });
|
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:223:13
|
LL | let _ = match s {
| _____________^
LL | | Some(string) => string.len(),
LL | | None => 1,
LL | | };
| |_____^ help: try: `s.map_or(1, |string| string.len())`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:227:13
|
LL | let _ = match Some(10) {
| _____________^
LL | | Some(a) => a + 1,
LL | | None => 5,
LL | | };
| |_____^ help: try: `Some(10).map_or(5, |a| a + 1)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:233:13
|
LL | let _ = match res {
| _____________^
LL | | Ok(a) => a + 1,
LL | | _ => 1,
LL | | };
| |_____^ help: try: `res.map_or(1, |a| a + 1)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:237:13
|
LL | let _ = match res {
| _____________^
LL | | Err(_) => 1,
LL | | Ok(a) => a + 1,
LL | | };
| |_____^ help: try: `res.map_or(1, |a| a + 1)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:241:13
|
LL | let _ = if let Ok(a) = res { a + 1 } else { 5 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `res.map_or(5, |a| a + 1)`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:258:17
|
LL | let _ = match initial {
| _________________^
LL | | Some(value) => do_something(value),
LL | | None => 42,
LL | | };
| |_________^ help: try: `initial.as_ref().map_or(42, |value| do_something(value))`
error: use Option::map_or instead of an if let/else
--> $DIR/option_if_let_else.rs:265:17
|
LL | let _ = match initial {
| _________________^
LL | | Some(value) => do_something2(value),
LL | | None => 42,
LL | | };
| |_________^ help: try: `initial.as_mut().map_or(42, |value| do_something2(value))`
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:288:24
|
LL | let mut _hashmap = if let Some(hm) = &opt {
| ________________________^
LL | | hm.clone()
LL | | } else {
LL | | HashMap::new()
LL | | };
| |_____^ help: try: `opt.as_ref().map_or_else(HashMap::new, |hm| hm.clone())`
error: use Option::map_or_else instead of an if let/else
--> $DIR/option_if_let_else.rs:294:19
|
LL | let mut _hm = if let Some(hm) = &opt { hm.clone() } else { new_map!() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `opt.as_ref().map_or_else(|| new_map!(), |hm| hm.clone())`
error: aborting due to 25 previous errors
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