ccls/tests/class_forward_declaration.cc

class Foo;
class Foo;
class Foo {};
class Foo;

/*
OUTPUT:
{
  "types": [{
      "id": 0,
      "usr": "c:@S@Foo",
      "short_name": "Foo",
      "qualified_name": "Foo",
      "definition": "1:3:7",
      "uses": ["1:1:7", "1:2:7", "*1:3:7", "1:4:7"]
    }]
}
*/