Hi Joel, Ah yes, somehow missed those. Thanks! Best, Dee On Sat, Dec 22, 2012 at 9:03 AM, Joel de Guzman <djowel@gmail.com> wrote:
On 12/22/12 8:44 AM, Diederick C. Niehorster wrote:
Hi All,
I have struggled through getting a parser set up with qi, but in the end it all worked out. Its really a nice library once you get the hang of it a bit! I have one leftover question. I now have an inline function with phoenix for the error handler as per the example, but as i'm using it multiple times, i would like to make its own function that i can reuse. I have tried a function object, wrapped in a phoenix function or not, but never got it to work (either got number of argument mismatches or errors that const-volatile qualifiers were being dropped).
So basically, how would i rewrite the below into a free function (object/etc)?
qi::on_error<qi::fail> ( stimSpecVec // rule name , std::cout // the function << phoenix::val("Error! Expecting \"") << qi::_4 // what failed? << phoenix::val("\", but got: \"") << phoenix::construct<std::string>(qi::_3, qi::_2) // iterators to error-pos, end << phoenix::val("\"") << std::endl );
Taka a look at the compiler_tutorial examples. The error handlers use function objects there. You will see lots of examples.
Regards, -- Joel de Guzman http://www.boostpro.com http://boost-spirit.com
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