How to call C# async functions

[632575987]

How to call C# async functions

[viniciusjarina]

NLua relies on .NET reflection to invoke methods. There is no await in Lua. I would suggest to "wrap" the async method in a way that you can callback a Lua method after is done.

Something like

using System;
using System.Threading.Tasks;
using NLua;

namespace ConsoleApp1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Lua lua = new Lua();
            lua["obj"] = new Program();
            lua.DoString(@" 
                           obj:InvokeAsk('Hello', function(res)
                            if res then
                                print('AskAsync: true')
                            else
                                print('AskAsync: false')
                            end
                           end)
");
            Console.ReadKey();
        }

        public void InvokeAsk(string param, LuaFunction callback)
        {
            AskAsync(param).ContinueWith(t =>
            {
                bool result = t.Result;
                callback.Call(result);
                return true;
            });
        }

        private static async Task<bool> AskAsync(string param)
        {
            await Task.Delay(1000);
            return false;
        }
    }
}

[632575987]

NLua relies on .NET reflection to invoke methods. There is no await in Lua. I would suggest to "wrap" the async method in a way that you can callback a Lua method after is done.

Something like

using System;

using System.Threading.Tasks;

using NLua;



namespace ConsoleApp1

{

    internal class Program

    {

        static void Main(string[] args)

        {

            Lua lua = new Lua();

            lua["obj"] = new Program();

            lua.DoString(@" 

                           obj:InvokeAsk('Hello', function(res)

                            if res then

                                print('AskAsync: true')

                            else

                                print('AskAsync: false')

                            end

                           end)

");

            Console.ReadKey();

        }



        public void InvokeAsk(string param, LuaFunction callback)

        {

            AskAsync(param).ContinueWith(t =>

            {

                bool result = t.Result;

                callback.Call(result);

                return true;

            });

        }



        private static async Task<bool> AskAsync(string param)

        {

            await Task.Delay(1000);

            return false;

        }

    }

}

Thanks very much. This is very useful to me.