1.66 API breaking change in io_context constructor

[ghost]

@StephanDollberg commented on Feb 17, 2018, 8:57 PM UTC:

Hello,

1.66 introduced an API breaking change in the constructor of io_context.

io_context takes an int while io_service took a std::size_t. Compare v1.66 and v1.65. This change breaks all code that stored a std::size_t which later got passed to the io_service constructor due to a now narrowing conversion.

I think this should either be fixed or noted on http://www.boost.org/doc/libs/1_66_0/doc/html/boost_asio/net_ts.html as io_service is not a strict typedef but a different type.

For example, see microsoft/cpprestsdk#654.

thanks,
Stephan

This issue was moved by chriskohlhoff from boostorg/asio#89.