includes = ["memory", "optional"]

definitions = '''
  struct IncompleteType;
  struct IncompleteTypeContainer {
    IncompleteType *ptrundef;
    // std::unique_ptr<IncompleteType> unundef; // std::unique_ptr requires its template param to have a size
    char __makePad1;
    std::shared_ptr<IncompleteType> shundef;
    char __makePad2;
    std::optional<std::shared_ptr<IncompleteType>> shoptundef;
    char __makePad3;
    std::optional<IncompleteType *> optundef;
  };

  void incomplete_type_deleter(IncompleteType *ptr) {
    ::operator delete(ptr);
  }
'''
[cases]
  [cases.raw]
    oil_disable = "oil can't chase raw pointers safely"
    oid_skip = "oid codegen fails on this" # https://github.com/facebookexperimental/object-introspection/issues/17
    param_types = ["IncompleteType*"]
    setup = "return static_cast<IncompleteType*>(::operator new(5));"
    cli_options = ["-fchase-raw-pointers"]
    expect_json = '''[{
      "typeName": "IncompleteType *",
      "staticSize": 8,
      "dynamicSize": 0,
      "NOT": {"pointer": 0},
      "NOT": "members"
    }]'''
  [cases.raw_no_follow]
    skip = "oid codegen fails on this" # https://github.com/facebookexperimental/object-introspection/issues/17
    param_types = ["IncompleteType*"]
    setup = "return static_cast<IncompleteType*>(::operator new(5));"
    expect_json = '''[{
      "typeName": "IncompleteType *",
      "staticSize": 8,
      "dynamicSize": 0,
      "NOT": {"pointer": 0},
      "NOT": "members"
    }]'''
  [cases.raw_null]
    skip = "oid codegen fails on this" # https://github.com/facebookexperimental/object-introspection/issues/17
    param_types = ["IncompleteType*"]
    setup = "return nullptr;"
    expect_json = '''[{
      "typeName": "IncompleteType *",
      "staticSize": 8,
      "dynamicSize": 0,
      "pointer": 0,
      "NOT": "members"
    }]'''

  [cases.unique_ptr]
    oil_skip = 'not implemented for treebuilder v2' # https://github.com/facebookexperimental/object-introspection/issues/299
    param_types = ["const std::unique_ptr<IncompleteType, decltype(&incomplete_type_deleter)>&"]
    setup = '''
      auto raw_ptr = static_cast<IncompleteType*>(::operator new(5));
      return std::unique_ptr<IncompleteType, decltype(&incomplete_type_deleter)>(
        raw_ptr, &incomplete_type_deleter);
    '''
    expect_json = '[{"staticSize":16, "dynamicSize":0, "NOT":"members"}]'
  [cases.unique_ptr_null]
    oil_skip = 'not implemented for treebuilder v2' # https://github.com/facebookexperimental/object-introspection/issues/299
    param_types = ["const std::unique_ptr<IncompleteType, decltype(&incomplete_type_deleter)>&"]
    setup = '''
      return std::unique_ptr<IncompleteType, decltype(&incomplete_type_deleter)>(
        nullptr, &incomplete_type_deleter);
    '''
    expect_json = '[{"staticSize":16, "dynamicSize":0, "NOT":"members"}]'

  [cases.shared_ptr]
    oil_skip = 'not implemented for treebuilder v2' # https://github.com/facebookexperimental/object-introspection/issues/300
    param_types = ["const std::shared_ptr<IncompleteType>&"]
    setup = '''
      auto raw_ptr = static_cast<IncompleteType*>(::operator new(5));
      return std::shared_ptr<IncompleteType>(raw_ptr , &incomplete_type_deleter);
    '''
    expect_json = '[{"staticSize":16, "dynamicSize":0, "NOT":"members"}]'
  [cases.shared_ptr_null]
    oil_skip = 'not implemented for treebuilder v2' # https://github.com/facebookexperimental/object-introspection/issues/300
    param_types = ["const std::shared_ptr<IncompleteType>"]
    setup = "return nullptr;"
    expect_json = '[{"staticSize":16, "dynamicSize":0, "NOT":"members"}]'

  [cases.containing_struct]
    oil_disable = "oil can't chase raw pointers safely"
    param_types = ["const IncompleteTypeContainer&"]
    setup = "return IncompleteTypeContainer{};"
    cli_options = ["-fchase-raw-pointers"]
    expect_json = '''[{
      "staticSize": 88,
      "dynamicSize": 0,
      "paddingSavingsSize": 21,
      "members": [
        { "name": "ptrundef", "staticSize": 8, "dynamicSize": 0 },
        { "name": "__makePad1", "staticSize": 1, "dynamicSize": 0 },
        { "name": "shundef", "staticSize": 16, "dynamicSize": 0 },
        { "name": "__makePad2", "staticSize": 1, "dynamicSize": 0 },
        { "name": "shoptundef",
          "staticSize": 24,
          "dynamicSize": 0,
          "length": 0,
          "capacity": 1,
          "elementStaticSize": 16
        },
        { "name": "__makePad3", "staticSize": 1, "dynamicSize": 0 },
        { "name": "optundef",
          "staticSize": 16,
          "dynamicSize": 0,
          "length": 0,
          "capacity": 1,
          "elementStaticSize": 8
        }
      ]
    }]'''