Merge pull request #2022 from rust-lang-nursery/oli-obk-patch-1

Also ignore `continue` statements in `is_unit_expr`

clippy_lints/src/is_unit_expr.rs

@@ -98,6 +98,7 @@ impl EarlyLintPass for UnitExpr {
         }
     }
 }
+
 fn is_unit_expr(expr: &Expr) -> Option<Span> {
     match expr.node {
         ExprKind::Block(ref block) => if check_last_stmt_in_block(block) {
@@ -139,9 +140,13 @@ fn check_last_stmt_in_block(block: &Block) -> bool {
     // like `panic!()`
     match final_stmt.node {
         StmtKind::Expr(_) => false,
-        StmtKind::Semi(ref expr) => match expr.node {
-            ExprKind::Break(_, _) | ExprKind::Ret(_) => false,
-            _ => true,
+        StmtKind::Semi(ref expr) => {
+            match expr.node {
+                ExprKind::Break(_, _) |
+                ExprKind::Continue(_) |
+                ExprKind::Ret(_) => false,
+                _ => true,
+            }
         },
         _ => true,
     }

tests/ui/is_unit_expr.rs

@@ -45,4 +45,29 @@ fn main() {
             0;
         },
     };
+    
+    loop {
+        let a2 = match a1 {
+            Some(x) => x,
+            _ => {
+                break;
+            },
+        };
+        let a2 = match a1 {
+            Some(x) => x,
+            _ => {
+                continue;
+            },
+        };
+    }
+}
+
+pub fn foo() -> i32 {
+    let a2 = match None {
+        Some(x) => x,
+        _ => {
+            return 42;
+        },
+    };
+    55
 }