Fix allow attribute, items from macros in items_after_statements

tests/ui/items_after_statement.rs

@@ -51,3 +51,20 @@ fn semicolon() {
 
     let _ = S::new(3);
 }
+
+fn item_from_macro() {
+    macro_rules! static_assert_size {
+        ($ty:ty, $size:expr) => {
+            const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
+        };
+    }
+
+    let _ = 1;
+    static_assert_size!(u32, 4);
+}
+
+fn allow_attribute() {
+    let _ = 1;
+    #[allow(clippy::items_after_statements)]
+    const _: usize = 1;
+}

tests/ui/items_after_statement.stderr

@@ -1,5 +1,5 @@
 error: adding items after statements is confusing, since items exist from the start of the scope
-  --> $DIR/item_after_statement.rs:13:5
+  --> $DIR/items_after_statement.rs:13:5
    |
 LL | /     fn foo() {
 LL | |         println!("foo");
@@ -9,7 +9,7 @@ LL | |     }
    = note: `-D clippy::items-after-statements` implied by `-D warnings`
 
 error: adding items after statements is confusing, since items exist from the start of the scope
-  --> $DIR/item_after_statement.rs:20:5
+  --> $DIR/items_after_statement.rs:20:5
    |
 LL | /     fn foo() {
 LL | |         println!("foo");
@@ -17,7 +17,7 @@ LL | |     }
    | |_____^
 
 error: adding items after statements is confusing, since items exist from the start of the scope
-  --> $DIR/item_after_statement.rs:33:13
+  --> $DIR/items_after_statement.rs:33:13
    |
 LL | /             fn say_something() {
 LL | |                 println!("something");