Boost beast integration issues in UE4 plugin?

I am trying to create a UE4 plugin then I can simply create a blueprint function like so using Boost Beast client example:

void UBoostBPFunctionLibrary::ConnectWebsocket(FString inMessage, FString& outResStr)
{
	//using tcp = boost::asio::ip::tcp;               // from <boost/asio/ip/tcp.hpp>
	//namespace websocket = boost::beast::websocket;  // from <boost/beast/websocket.hpp>

	//auto const host = "127.0.0.1";
	//auto const port = "8080";
	//std::string text(TCHAR_TO_ANSI(*inMessage));

	//// The io_context is required for all I/O
	//boost::asio::io_context ioc;

	//// These objects perform our I/O
	//tcp::resolver resolver{ ioc };
	//websocket::stream<tcp::socket> ws{ ioc };

	//// Look up the domain name
	//auto const results = resolver.resolve(host, port);

	//// Make the connection on the IP address we get from a lookup
	//boost::asio::connect(ws.next_layer(), results.begin(), results.end());

	//// Perform the websocket handshake
	//ws.handshake(host, "/");

	//// Send the message
	//ws.write(boost::asio::buffer(std::string(text)));

	//// This buffer will hold the incoming message
	//boost::beast::multi_buffer buffer;

	//// Read a message into our buffer
	//ws.read(buffer);

	//// Close the WebSocket connection
	//ws.close(websocket::close_code::normal);

	////// If we get here then the connection is closed gracefully
	////	// The buffers() function helps print a ConstBufferSequence
	//outResStr = FString(boost::beast::to_static_string(boost::beast::buffers(buffer.data())).c_str());
}

But as I try to compile simply by including the following header files in my BoostBPFunctionLibrary.h :

#include <boost/beast/core.hpp>
#include <boost/beast/websocket.hpp>
#include <boost/asio/connect.hpp>
#include <boost/asio/ip/tcp.hpp>

I get loads of errors such as the following. I guess the errors are all pointing to the clash of check definition in “AssertionMacros.h” and any boost version of it, but the question then is how can I fix that and make it work ? Why is there no clear fundamental separation between the two definitions ? I tried to remove the boost version of “check function” as pointed by the first error line but that breaks other code files in boost, I tried to do that to UE4 and the answer is still no. I feel that there is something fundamentally wrong here. Please advice.

  2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1333): error C4003: not enough arguments for function-like macro invocation 'check'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1333): error C2062: type 'void' unexpected
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1405): note: see reference to class template instantiation 'boost::intrusive::list_impl<ValueTraits,SizeType,ConstantTimeSize,HeaderHolder>' being compiled
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1333): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1334): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1334): error C2059: syntax error: '{'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/list.hpp(1334): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1452): warning C4002: too many arguments for function-like macro invocation 'check'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1452): error C2988: unrecognizable template declaration/definition
    2>  C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(2074): note: see reference to class template instantiation 'boost::intrusive::bstree_algorithms<NodeTraits>' being compiled
    2>  C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/core/string.hpp(87): note: see reference to class template instantiation 'boost::basic_string_view<char,std::char_traits<char>>' being compiled
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1452): error C2059: syntax error: '<end Parse>'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1452): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1453): error C2988: unrecognizable template declaration/definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1453): error C2059: syntax error: '{'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree_algorithms.hpp(1453): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2074): error C4003: not enough arguments for function-like macro invocation 'check'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2057): error C2988: unrecognizable template declaration/definition
    2>  C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2122): note: see reference to class template instantiation 'boost::intrusive::bstree_impl<ValueTraits,VoidOrKeyOfValue,VoidOrKeyComp,SizeType,ConstantTimeSize,AlgoType,HeaderHolder>' being compiled
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2057): error C2059: syntax error: '<end Parse>'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2057): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2058): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2058): error C2988: unrecognizable template declaration/definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2058): error C2059: syntax error: '{'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2058): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2074): error C2062: type 'void' unexpected
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2074): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2075): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2075): error C2988: unrecognizable template declaration/definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2075): error C2059: syntax error: '{'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2075): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2081): error C2988: unrecognizable template declaration/definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2081): error C2059: syntax error: 'if'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2081): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2084): error C2988: unrecognizable template declaration/definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2084): error C2059: syntax error: 'return'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2084): error C2238: unexpected token(s) preceding ';'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2087): error C2255: 'friend': not allowed outside of a class definition
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/intrusive/bstree.hpp(2087): error C2144: syntax error: 'bool' should be preceded by ';'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(36): error C2988: unrecognizable template declaration/definition
    2>  C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(41): note: see reference to class template instantiation 'boost::beast::http::detail::is_header_impl<T>' being compiled
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(36): error C2059: syntax error: '<end Parse>'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(36): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(38): error C2226: syntax error: unexpected type 'std::false_type'
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(38): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
    2>C:\Users\Alam Syed\Documents\Unreal Projects\SomeProject\Plugins\PCL\Source\PCL\Boost\include\boost-root\boost/beast/http/detail/type_traits.hpp(40): error C2760: syntax error: unexpected token '{', expected 'expression'
    2>  Module.PCL.cpp

Do you need to include the boost headers in your .h file? Do you get any errors when you include them .cpp files only? It’s quite possible that boost headers interfere with Unreal’s declarations.

hi, did you solve the problem ?