OK, I found it. Short answer: for some reason running this code from within the context of a Qt console app breaks it.

Now let me respond to your questions: I using VC 2008 with boost 1.44. I am also compiling from within the Qt environment.

I did not show all of the code because it wouldn't compile unless you were working with qt. The real code looked like:

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    // read my_input.txt and save uppercase version of text into datastore.txt

     // code shown in previous email redacted

    return a.exec();
}

Commenting-out the line with QCoreApplication and replacing the return statement with "return 0" made it work. I don't yet understand the problem but at least I now know that both the example works and I didn't bungle it.

Many thanks for taking the time to look at my problem.

johnh

On Thu, Feb 10, 2011 at 6:48 PM, eg <egoots@gmail.com> wrote:

On 2/8/2011 1:22 PM, John Hendrix wrote:

Hi all,

the following, as far as I can tell, is exactly the same "Ordinary
OutputFilter" example shown at (http://tinyurl.com/45bur3o)

...

I am obviously doing not adding the toupper_filter into the filter chain
correctly. Can anyone point out what I am doing wrong?

Not sure what you are doing... but your code works for me on Windows with VS2008 using Boost 1.45.

My_input.txt contained 1 line as follows:
ThIs Is A tEsT 123!

After running, datastore.txt contained:
THIS IS A TEST 123!

What version of boost, what compiler, what input and output do you get?

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