Fix not parse never type in inherent impl

Author: A4-Tacks

crates/parser/src/grammar/items/traits.rs

@@ -54,12 +54,13 @@ pub(super) fn impl_(p: &mut Parser<'_>, m: Marker) {
     // impl const Send for S {}
     p.eat(T![const]);
 
-    // FIXME: never type
+    // test impl_item_never_type
     // impl ! {}
-
-    // test impl_item_neg
-    // impl !Send for S {}
-    p.eat(T![!]);
+    if p.at(T![!]) && !p.nth_at(1, T!['{']) {
+        // test impl_item_neg
+        // impl !Send for S {}
+        p.eat(T![!]);
+    }
     impl_type(p);
     if p.eat(T![for]) {
         impl_type(p);

crates/parser/test_data/generated/runner.rs

@@ -322,6 +322,10 @@ mod ok {
     #[test]
     fn impl_item_neg() { run_and_expect_no_errors("test_data/parser/inline/ok/impl_item_neg.rs"); }
     #[test]
+    fn impl_item_never_type() {
+        run_and_expect_no_errors("test_data/parser/inline/ok/impl_item_never_type.rs");
+    }
+    #[test]
     fn impl_trait_type() {
         run_and_expect_no_errors("test_data/parser/inline/ok/impl_trait_type.rs");
     }

crates/parser/test_data/parser/inline/ok/impl_item_never_type.rast

@@ -0,0 +1,11 @@
+SOURCE_FILE
+  IMPL
+    IMPL_KW "impl"
+    WHITESPACE " "
+    NEVER_TYPE
+      BANG "!"
+    WHITESPACE " "
+    ASSOC_ITEM_LIST
+      L_CURLY "{"
+      R_CURLY "}"
+  WHITESPACE "\n"

crates/parser/test_data/parser/inline/ok/impl_item_never_type.rs

@@ -0,0 +1 @@
+impl ! {}