Re: [Boost-users] Problems with boost::asio::local::stream_protocol::iostream under Boost 1.36.0

I was inferring what to pass in by the examples of tcp::iostream. I'm assuming that the input parameters for the constructor are the same parameters as for the 'connect' method (which, according to the documentation, are used to construct a resolver query object). I combined this with the examples of using stream_protocol::socket (in examples/local/stream_client.cpp and stream_server.cpp) and figured I could supply either a file name or an endpoint. I also tried suppling no parameters (with the intent of doing a connect afterwards) and got the same error about resolver_query being missing. Alex Adranghi wrote:

Hi,

I also had the same error, and as a result switched to using the underlying api. According to the references there is no implementation for resolver query for local sockets. I didnt trawl through the source to check though. Also where did you find out what to pass to the stream_protocol's constructor?

Jason Bertschi wrote:

...

I'm trying to use asio::local::stream_protocol::iostream to connect to a server (using Boost library version 1.36.0). The code looks something like this:

boost::asio::local::stream_protocol::iostream mgmtStream("/tmp/pipes/mgmtsock"); if (!mgmtStream) throw std::exception(); // Send cmd to mgmt mgmtStream << cmd << std::flush;

I get a compilation error on the line creating mgmtStream. The interesting part is this: no type named 'resolver_query' in 'class boost::asio::local::stream_protocol'

I tried breaking the creation into two steps (create local::stream_protocol::endpoint with the name of the socket then passing the endpoint into the iostream constructor), but the result was about the same (the failure occurred on the line creating the iostream, not the line creating the endpoint).

The problem seems to be that basic_socket_streambuf requires the definition of type resolver_query (within stream_protocol in this case). It seems that ip::tcp::iostream declares it to be of type ip::basic_resolver_query<tcp>; I saw no obvious equivalent in the local namespace, and my attempt to add 'typedef ip::basic_resolver_query resolver_query;' to stream_protocol of course did nothing helpful (just added a lot more compilation errors). Frankly, I'm not sure how stream_protocol::iostream could possibly compile without this definition somewhere...

Any ideas?

Below is the full output from g++ (in case there's something helpful): export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp: In instantiation of 'boost::asio::basic_socket_streambufboost::asio::local::stream_protocol >': export_Darwin_i386/include/boost/utility/base_from_member.hpp:69: instantiated from 'boost::base_from_memberboost::asio::local::stream_protocol

...

, 0>'

export_Darwin_i386/include/boost/asio/basic_socket_iostream.hpp:86: instantiated from 'boost::asio::basic_socket_iostreamboost::asio::local::stream_protocol >' build_Darwin_i386/confdb/ObjectManager.cc:461: instantiated from here export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp:252: error: no type named 'resolver_query' in 'class boost::asio::local::stream_protocol' export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp: In member function 'boost::asio::basic_socket_streambuf* boost::asio::basic_socket_streambuf::connect(T0) [with T0 = const char*, Protocol = boost::asio::local::stream_protocol, StreamSocketService = boost::asio::stream_socket_serviceboost::asio::local::stream_protocol]': export_Darwin_i386/include/boost/asio/basic_socket_iostream.hpp:106: instantiated from 'boost::asio::basic_socket_iostream::basic_socket_iostream(T0) [with T0 = const char*, Protocol = boost::asio::local::stream_protocol, StreamSocketService = boost::asio::stream_socket_serviceboost::asio::local::stream_protocol]' build_Darwin_i386/confdb/ObjectManager.cc:461: instantiated from here export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp:131: error: no type named 'resolver_query' in 'class boost::asio::local::stream_protocol' export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp:131: error: no type named 'resolver_query' in 'class boost::asio::local::stream_protocol' export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp:131: error: no type named 'resolver_query' in 'class boost::asio::local::stream_protocol' export_Darwin_i386/include/boost/asio/basic_socket_streambuf.hpp:131: error: 'resolve_and_connect' was not declared in this scope

Thanks, Jason Bertschi jbertschi@mac.com