Async question

[robert]

Wolfgang,
We also accept the discard name '_' in our code.
Did you try

Code: Select all

self:Post( { _ => self:done := true }, null )

Robert

[wriedmann]

Hi Robert,
ok, thank you very much, that works.
But how do I add an async keyword to a lamda expression?

Code: Select all

synch.Post(async _ =>
            {
                try
                {
                    await task();
                }
                catch (Exception e)
                {
                    synch.InnerException = e;
                    throw;
                }
                finally
                {
                    synch.EndMessageLoop();
                }
            }, null);

does not works as

Code: Select all

	synch:Post( { _ =>
	    try
        await task()
	    catch e as Exception
        synch.InnerException := e
        throw
	    finally
        synch:EndMessageLoop()
	    end try
	}, null )

and adding the async before the underscore like

Code: Select all

	synch:Post( { async _ =>
	    try

gives

Code: Select all

error XS9002: Parser: unexpected input '_'

Thank you again!
Wolfgang

[robert]

Wolfgang,

Change the lambda to a delegate

Code: Select all

synch:Post(  async delegate(_ as object)  { 
	try
           await task()
	catch e as Exception
            synch.InnerException := e
             throw
	finally
            synch:EndMessageLoop()
	 end try
	}, null )

Note I did not test this since I do not have all the code

Robert

[wriedmann]

Hi Robert,
thank you very much, my code compiles now without error.And it works also <g>.I have attached the entire prg file here if someone other needs it:

AsyncHelpers.zip

(1.29 KiB) Downloaded 89 times

Thank you very much for all your assistance!
When my FTPS lib is ready, I will post a link to the sources here.
Wolfgang