id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8774	use of dectype in result_of gives errors in spirit parser on gcc-4.8.1	rodolfo@…	Joel de Guzman	"The following snippet compiles and runs fine on boost-1.53 and earlier using gcc-4.8.1, but fails to compile on boost-1.54.

{{{
//#define BOOST_RESULT_OF_USE_TR1
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>

int main()
{

    namespace qi = boost::spirit::qi;
    qi::rule<const char *, void(int &)> foo = qi::int_[qi::_r1 = qi::_1];
    qi::rule<const char *, int()> start = foo(qi::_val);

    const char *beg = ""5"",
               *end = beg+strlen(beg);

    int val;
    if(parse(beg, end, start, val))
        std::cout << val << std::endl;
    else
        std::cout << ""error"";
}
}}}

The compile error output is attached to this ticket. The error goes away by uncommenting the first line.

It seems that boost-1.54 enables by default the use of decltype in the implementation of boost::result_of but it isn't doing what it's suppose to do."	Bugs	closed	To Be Determined	spirit	Boost 1.54.0	Regression	fixed