empty_struct_with_brackets: do not lint code coming from macro expansion

clippy_lints/src/empty_with_brackets.rs

@@ -75,6 +75,7 @@ declare_lint_pass!(EmptyWithBrackets => [EMPTY_STRUCTS_WITH_BRACKETS, EMPTY_ENUM
 impl EarlyLintPass for EmptyWithBrackets {
     fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) {
         if let ItemKind::Struct(ident, var_data, _) = &item.kind
+            && !item.span.from_expansion()
             && has_brackets(var_data)
             && let span_after_ident = item.span.with_lo(ident.span.hi())
             && has_no_fields(cx, var_data, span_after_ident)

tests/ui/empty_structs_with_brackets.fixed

@@ -23,4 +23,12 @@ struct MyTupleStruct(usize, String); // should not trigger lint
 struct MySingleTupleStruct(usize); // should not trigger lint
 struct MyUnitLikeStruct; // should not trigger lint
 
+macro_rules! empty_struct {
+    ($s:ident) => {
+        struct $s {}
+    };
+}
+
+empty_struct!(FromMacro);
+
 fn main() {}

tests/ui/empty_structs_with_brackets.rs

@@ -23,4 +23,12 @@ struct MyTupleStruct(usize, String); // should not trigger lint
 struct MySingleTupleStruct(usize); // should not trigger lint
 struct MyUnitLikeStruct; // should not trigger lint
 
+macro_rules! empty_struct {
+    ($s:ident) => {
+        struct $s {}
+    };
+}
+
+empty_struct!(FromMacro);
+
 fn main() {}