fix reviewer comments

clippy_lints/src/matches/match_like_matches.rs

@@ -183,12 +183,9 @@ fn find_bool_lit(ex: &ExprKind<'_>) -> Option<bool> {
 
 fn is_some(path_kind: PatKind<'_>) -> bool {
     match path_kind {
-        PatKind::TupleStruct(QPath::Resolved(_, path), patterns, _) if is_wild(&patterns[0]) => {
+        PatKind::TupleStruct(QPath::Resolved(_, path), [first, ..], _) if is_wild(first) => {
             let name = path.segments[0].ident;
-            if name.name == rustc_span::sym::Some {
-                return true;
-            }
-            false
+            name.name == rustc_span::sym::Some
         },
         _ => false,
     }

clippy_lints/src/matches/redundant_pattern_match.rs

@@ -188,9 +188,8 @@ fn find_sugg_for_if_let<'tcx>(
 pub(super) fn check_match<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, op: &Expr<'_>, arms: &[Arm<'_>]) {
     if arms.len() == 2 {
         let node_pair = (&arms[0].pat.kind, &arms[1].pat.kind);
-        let found_good_method = found_good_method(cx, arms, node_pair);
 
-        if let Some(good_method) = found_good_method {
+        if let Some(good_method) = found_good_method(cx, arms, node_pair) {
             let span = expr.span.to(op.span);
             let result_expr = match &op.kind {
                 ExprKind::AddrOf(_, _, borrowed) => borrowed,
@@ -310,6 +309,9 @@ fn get_good_method<'a>(cx: &LateContext<'_>, arms: &[Arm<'_>], path_left: &QPath
             "Ok" => {
                 find_good_method_for_matches_macro(cx, arms, path_left, Item::Lang(ResultOk), "is_ok()", "is_err()")
             },
+            "Err" => {
+                find_good_method_for_matches_macro(cx, arms, path_left, Item::Lang(ResultErr), "is_err()", "is_ok()")
+            },
             "Some" => find_good_method_for_matches_macro(
                 cx,
                 arms,

tests/ui/redundant_pattern_matching_option.fixed

@@ -95,15 +95,12 @@ fn issue10726() {
 
     Some(42).is_none();
 
-    Some(42).is_none();
-
-    Some(42).is_some();
-
-    None::<()>.is_none();
-
-    None::<()>.is_none();
-
-    None::<()>.is_none();
-
     None::<()>.is_some();
+
+    None::<()>.is_none();
+
+    match Some(42) {
+        Some(21) => true,
+        _ => false,
+    };
 }

tests/ui/redundant_pattern_matching_option.rs

@@ -111,29 +111,14 @@ fn issue10726() {
         _ => false,
     };
 
-    match Some(42) {
-        Some(_) => false,
-        _ => true,
-    };
-
     match Some(42) {
         None => true,
         _ => false,
     };
 
-    match Some(42) {
-        None => false,
-        _ => true,
-    };
-
     match None::<()> {
-        Some(_) => false,
-        _ => true,
-    };
-
-    match None::<()> {
-        Some(_) => false,
-        _ => true,
+        Some(_) => true,
+        _ => false,
     };
 
     match None::<()> {
@@ -141,8 +126,8 @@ fn issue10726() {
         _ => false,
     };
 
-    match None::<()> {
-        None => false,
-        _ => true,
+    match Some(42) {
+        Some(21) => true,
+        _ => false,
     };
 }

tests/ui/redundant_pattern_matching_option.stderr

@@ -161,64 +161,28 @@ error: redundant pattern matching, consider using `is_none()`
   --> $DIR/redundant_pattern_matching_option.rs:114:5
    |
 LL | /     match Some(42) {
-LL | |         Some(_) => false,
-LL | |         _ => true,
+LL | |         None => true,
+LL | |         _ => false,
 LL | |     };
    | |_____^ help: try this: `Some(42).is_none()`
 
-error: redundant pattern matching, consider using `is_none()`
+error: redundant pattern matching, consider using `is_some()`
   --> $DIR/redundant_pattern_matching_option.rs:119:5
    |
-LL | /     match Some(42) {
-LL | |         None => true,
+LL | /     match None::<()> {
+LL | |         Some(_) => true,
 LL | |         _ => false,
-LL | |     };
-   | |_____^ help: try this: `Some(42).is_none()`
-
-error: redundant pattern matching, consider using `is_some()`
-  --> $DIR/redundant_pattern_matching_option.rs:124:5
-   |
-LL | /     match Some(42) {
-LL | |         None => false,
-LL | |         _ => true,
-LL | |     };
-   | |_____^ help: try this: `Some(42).is_some()`
-
-error: redundant pattern matching, consider using `is_none()`
-  --> $DIR/redundant_pattern_matching_option.rs:129:5
-   |
-LL | /     match None::<()> {
-LL | |         Some(_) => false,
-LL | |         _ => true,
-LL | |     };
-   | |_____^ help: try this: `None::<()>.is_none()`
-
-error: redundant pattern matching, consider using `is_none()`
-  --> $DIR/redundant_pattern_matching_option.rs:134:5
-   |
-LL | /     match None::<()> {
-LL | |         Some(_) => false,
-LL | |         _ => true,
-LL | |     };
-   | |_____^ help: try this: `None::<()>.is_none()`
-
-error: redundant pattern matching, consider using `is_none()`
-  --> $DIR/redundant_pattern_matching_option.rs:139:5
-   |
-LL | /     match None::<()> {
-LL | |         None => true,
-LL | |         _ => false,
-LL | |     };
-   | |_____^ help: try this: `None::<()>.is_none()`
-
-error: redundant pattern matching, consider using `is_some()`
-  --> $DIR/redundant_pattern_matching_option.rs:144:5
-   |
-LL | /     match None::<()> {
-LL | |         None => false,
-LL | |         _ => true,
 LL | |     };
    | |_____^ help: try this: `None::<()>.is_some()`
 
-error: aborting due to 30 previous errors
+error: redundant pattern matching, consider using `is_none()`
+  --> $DIR/redundant_pattern_matching_option.rs:124:5
+   |
+LL | /     match None::<()> {
+LL | |         None => true,
+LL | |         _ => false,
+LL | |     };
+   | |_____^ help: try this: `None::<()>.is_none()`
+
+error: aborting due to 26 previous errors
 

tests/ui/redundant_pattern_matching_result.fixed

@@ -114,7 +114,12 @@ fn issue10726() {
 
     Ok::<i32, i32>(42).is_err();
 
+    Err::<i32, i32>(42).is_ok();
+
     Err::<i32, i32>(42).is_err();
 
-    Err::<i32, i32>(42).is_ok();
+    match Ok::<i32, i32>(42) {
+        Ok(21) => true,
+        _ => false,
+    };
 }

tests/ui/redundant_pattern_matching_result.rs

@@ -134,17 +134,22 @@ fn issue10726() {
     };
 
     match Ok::<i32, i32>(42) {
-        Ok(_) => false,
-        _ => true,
-    };
-
-    match Err::<i32, i32>(42) {
-        Ok(_) => false,
-        _ => true,
+        Err(_) => true,
+        _ => false,
     };
 
     match Err::<i32, i32>(42) {
         Ok(_) => true,
         _ => false,
     };
+
+    match Err::<i32, i32>(42) {
+        Err(_) => true,
+        _ => false,
+    };
+
+    match Ok::<i32, i32>(42) {
+        Ok(21) => true,
+        _ => false,
+    };
 }

tests/ui/redundant_pattern_matching_result.stderr

@@ -163,22 +163,13 @@ error: redundant pattern matching, consider using `is_err()`
   --> $DIR/redundant_pattern_matching_result.rs:136:5
    |
 LL | /     match Ok::<i32, i32>(42) {
-LL | |         Ok(_) => false,
-LL | |         _ => true,
+LL | |         Err(_) => true,
+LL | |         _ => false,
 LL | |     };
    | |_____^ help: try this: `Ok::<i32, i32>(42).is_err()`
 
-error: redundant pattern matching, consider using `is_err()`
-  --> $DIR/redundant_pattern_matching_result.rs:141:5
-   |
-LL | /     match Err::<i32, i32>(42) {
-LL | |         Ok(_) => false,
-LL | |         _ => true,
-LL | |     };
-   | |_____^ help: try this: `Err::<i32, i32>(42).is_err()`
-
 error: redundant pattern matching, consider using `is_ok()`
-  --> $DIR/redundant_pattern_matching_result.rs:146:5
+  --> $DIR/redundant_pattern_matching_result.rs:141:5
    |
 LL | /     match Err::<i32, i32>(42) {
 LL | |         Ok(_) => true,
@@ -186,5 +177,14 @@ LL | |         _ => false,
 LL | |     };
    | |_____^ help: try this: `Err::<i32, i32>(42).is_ok()`
 
+error: redundant pattern matching, consider using `is_err()`
+  --> $DIR/redundant_pattern_matching_result.rs:146:5
+   |
+LL | /     match Err::<i32, i32>(42) {
+LL | |         Err(_) => true,
+LL | |         _ => false,
+LL | |     };
+   | |_____^ help: try this: `Err::<i32, i32>(42).is_err()`
+
 error: aborting due to 26 previous errors