Vinnie Falco wrote:
However, the [HTTP] status code is part of the message and therefore should be part of the container. I do not think it should be treated as metadata, nor represented using error_code.
Consider this high-level function result<vector<char>> get( string const& url ); used like this auto r = get( "https://example.com/data.zip" ); This function can fail in many different ways, starting from the URL parser (invalid URL), passing through the possibility of an invalid/unrecognized URL scheme, a host that cannot be resolved, a TCP address that can't be connected to, and finally, a 404 HTTP error code. All these things should come back as std::error_code. There's no HTTP message here on this layer to contain the status.