boost::async compile error for -std=c++03 and c++98

[evgeny.panasyuk@…]

Following code results in compile error on GCC and Clang with -std=c++03 or -std=c++98 flags.

#include <boost/thread.hpp>

struct Calc
{
    typedef int result_type;

    result_type operator()() const
    {
        return result_type();
    }
};

int main()
{
    Calc x;
    boost::async(x);
}

LIVE DEMO: coliru.stacked-crooked.com/a/532c22d37e951a28

[viboes]

Have you tried defining BOOST_THREAD_VERSION 4?

[viboes]

PING !!!

[evgeny.panasyuk@…]

There is no error with this definition (on both GCC and Clang): coliru.stacked-crooked.com/a/a459a8fbce3c009a

[viboes]

Thanks for the report.

I don't know what to do. BOOST_THREAD_VERSION 2 contains a lot of limitation that were solved by BOOST_THREAD_VERSION 3 and 4.

[evgeny.panasyuk@…]

Perhaps newer BOOST_THREAD_VERSION should be set by default?

[viboes]

Replying to evgeny.panasyuk@…:

Perhaps newer BOOST_THREAD_VERSION should be set by default?

No. This will introduce breaking changes.