class Foo {
  void foo();
};

/*
// NOTE: Lack of declaring_type in functions and funcs in Foo is okay, because
//       those are processed when we find the definition for Foo::foo. Pure
//       virtuals are treated specially and get added to the type immediately.

OUTPUT:
{
  "includes": [],
  "skipped_ranges": [],
  "usr2func": [{
      "usr": 17922201480358737771,
      "detailed_name": "void Foo::foo()",
      "qual_name_offset": 5,
      "short_name": "foo",
      "kind": 6,
      "storage": 0,
      "declarations": ["2:8-2:11|15041163540773201510|2|513"],
      "declaring_type": 0,
      "bases": [],
      "derived": [],
      "vars": [],
      "uses": [],
      "callees": []
    }],
  "usr2type": [{
      "usr": 15041163540773201510,
      "detailed_name": "class Foo {}",
      "qual_name_offset": 6,
      "short_name": "Foo",
      "kind": 5,
      "declarations": [],
      "spell": "1:7-1:10|0|1|2",
      "extent": "1:1-3:2|0|1|0",
      "alias_of": 0,
      "bases": [],
      "derived": [],
      "types": [],
      "funcs": [17922201480358737771],
      "vars": [],
      "instances": [],
      "uses": []
    }],
  "usr2var": []
}
*/