Function print_half

example/print_half.cpp:48–63

This function handles ConversionErrc::TooLong errors, forwards any other error to the caller.

// This function handles ConversionErrc::TooLong errors, forwards any other
// error to the caller.
leaf::result<void> print_half(const std::string& text)
{
    return leaf::try_handle_some(
        [&]() -> leaf::result<void>
        {
            BOOST_LEAF_AUTO(r,convert(text));
            std::cout << r / 2 << std::endl;
            return { };
        },
        [&]( leaf::match<ConversionErrc, ConversionErrc::TooLong> ) -> leaf::result<void>
        {
            BOOST_LEAF_AUTO(i, BigInt::fromString(text));
            std::cout << i.half() << std::endl;
            return { };
        } );
}

int main( int argc, char const * argv[] )
{