JSON analysis with UWP VC++2017.

json_analyzer.cpp

//
// JSON analysis using UWP's JsonObject
//

void cpp_uwp::json_test::Button_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
	using namespace Windows::Data::Json;
	std::function<void(JsonObject^)> hhge{ [this](JsonObject^ json1) {
		std::wstringstream lout;
		std::function<void(IJsonValue^, Platform::String^)> foo{
		[this, &foo, &lout](IJsonValue^ ijv1, Platform::String^ key_name) {
			int i;
			Platform::String^ s;
			switch (ijv1->ValueType)
			{
			case JsonValueType::Boolean:
				lout << key_name->Data() << "," << (ijv1->GetBoolean() ? L"true" : L"false") << std::endl;
				break;
			case JsonValueType::Array:
				for (int i1 = 0; i1 < ijv1->GetArray()->Size; ++i1)
				{
					foo(ijv1->GetArray()->GetAt(i1), key_name);
				}
				break;
			case JsonValueType::Number:
				i = ijv1->GetNumber();
				lout << key_name->Data() << "," << i << std::endl;
				break;
			case JsonValueType::String:
				s = ijv1->GetString();
				lout << key_name->Data() << "," << s->Data() << std::endl;
				break;
			case JsonValueType::Object:
				bool bNext{true};
				auto JIt1 = ((JsonValue^)ijv1)->GetObject()->First();
				while (bNext)
				{
					foo(JIt1->Current->Value, JIt1->Current->Key);
					bNext = JIt1->MoveNext();
				}
				break;
			}
		} };
		foo(json1, nullptr);
		std::wstring outp{lout.str()};
		Edit1->Text = ref new Platform::String(outp.c_str());
	} };
	hhge(JsonObject::Parse(Edit1->Text));//文字列JSONの解析
}