********************************************************************************
conan test cci-c81bdd30/recipes/so5extra/all/test_package/conanfile.py so5extra/1.5.2@#fa8dd7710f2b6cfd84ddeea7e3bb9efc -pr /home/conan/w/prod-v1/bsr/1793/abdfb/profile_linux_7_libstdcpp11_gcc_release_64..txt -c tools.system.package_manager:mode=install -c tools.system.package_manager:sudo=True
********************************************************************************
Configuration:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=7
os=Linux
[options]
[build_requires]
[env]
[conf]
tools.system.package_manager:mode=install
tools.system.package_manager:sudo=True

so5extra/1.5.2 (test package): Installing package
Requirements
    so5extra/1.5.2 from local cache - Cache
    sobjectizer/5.7.4 from 'conan-center' - Cache
Packages
    so5extra/1.5.2:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache
    sobjectizer/5.7.4:66c5327ebdcecae0a01a863939964495fa019a06 - Cache

Installing (downloading, building) binaries...
sobjectizer/5.7.4: Already installed!
so5extra/1.5.2: Already installed!
so5extra/1.5.2 (test package): Generator txt created conanbuildinfo.txt
so5extra/1.5.2 (test package): Generator 'CMakeDeps' calling 'generate()'
so5extra/1.5.2 (test package): Generator 'VirtualRunEnv' calling 'generate()'
so5extra/1.5.2 (test package): Generator 'CMakeToolchain' calling 'generate()'
so5extra/1.5.2 (test package): Preset 'release' added to CMakePresets.json. Invoke it manually using 'cmake --preset release'
so5extra/1.5.2 (test package): If your CMake version is not compatible with CMakePresets (<3.19) call cmake like: 'cmake <path> -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release/generators/conan_toolchain.cmake -DCMAKE_POLICY_DEFAULT_CMP0091=NEW -DCMAKE_BUILD_TYPE=Release'
so5extra/1.5.2 (test package): Aggregating env generators
so5extra/1.5.2 (test package): Generated conaninfo.txt
so5extra/1.5.2 (test package): Generated graphinfo
Using lockfile: '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release/generators/conan.lock'
Using cached profile from lockfile
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
so5extra/1.5.2 (test package): Calling build()
so5extra/1.5.2 (test package): CMake command: cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release/generators/conan_toolchain.cmake" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/."

----Running------
> cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release/generators/conan_toolchain.cmake" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/."
-----------------
-- Using Conan toolchain: /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release/generators/conan_toolchain.cmake
-- The CXX compiler identification is GNU 7.5.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: Component target declared 'sobjectizer::so5extra'
-- Conan: Component target declared 'sobjectizer::StaticLib'
-- Configuring done
-- Generating done
-- Build files have been written to: /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release
so5extra/1.5.2 (test package): CMake command: cmake --build "/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release" '--' '-j3'

----Running------
> cmake --build "/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release" '--' '-j3'
-----------------
Scanning dependencies of target test_package
[ 50%] Building CXX object CMakeFiles/test_package.dir/test_package.cpp.o
CMakeFiles/test_package.dir/build.make:81: recipe for target 'CMakeFiles/test_package.dir/test_package.cpp.o' failed
CMakeFiles/Makefile2:94: recipe for target 'CMakeFiles/test_package.dir/all' failed
Makefile:102: recipe for target 'all' failed
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mbox_fwd.hpp:15:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mbox.hpp:24,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain.hpp:14,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/atomic_refcounted.hpp:313:79: error: expected constructor, destructor, or type conversion before ‘;’ token
 template<typename T> intrusive_ptr_t(std::unique_ptr<T>) -> intrusive_ptr_t<T>;
                                                                               ^
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/handler_makers.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:179:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)()>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() noexcept >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:164:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)()>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:187:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)() const>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() const noexcept >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:171:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)() const>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() const >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:209:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument)>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) noexcept>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:195:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument)>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument)>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:216:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument) const>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) const noexcept>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:202:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument) const>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) const>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select_ifaces.hpp:149:34: error: ‘variant’ in namespace ‘std’ does not name a template type
   using handling_result_t = std::variant<
                                  ^~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select_ifaces.hpp:248:11: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   virtual handling_result_t
           ^~~~~~~~~~~~~~~~~
           mchain_send_result_t
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:19:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:22,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/optional.hpp:19:12: error: ‘std::optional’ has not been declared
 using std::optional;
            ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:255:11: error: ‘optional’ does not name a type
   virtual optional<current_thread_id_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:259:11: error: ‘optional’ does not name a type
   virtual optional<std::type_index>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:263:11: error: ‘optional’ does not name a type
   virtual optional<msg_source_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:267:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::agent_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:271:11: error: ‘optional’ does not name a type
   virtual optional<message_or_signal_flag_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:275:11: error: ‘optional’ does not name a type
   virtual optional<message_instance_info_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:279:11: error: ‘optional’ does not name a type
   virtual optional<compound_action_description_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:283:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::impl::event_handler_data_t *>
           ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_tuning_options.hpp:16,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_context.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:30,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/enveloped_msg.hpp:229:1: error: ‘optional’ does not name a type
 optional< payload_info_t >
 ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/enveloped_msg.hpp:254:1: error: ‘optional’ does not name a type
 optional< message_ref_t >
 ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_tuning_options.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_context.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:30,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In static member function ‘static so_5::message_limit::transform_indicator_t<Arg> so_5::message_limit::message_limit_methods_mixin_t::limit_then_transform(unsigned int, Lambda)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:26: error: ‘is_same_v’ is not a member of ‘std’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                          ^~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:26: note: suggested alternative: ‘is_same’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                          ^~~~~~~~~
                          is_same
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:40: error: expected primary-expression before ‘,’ token
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                                        ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:42: error: expected string-literal before ‘any_unspecified_message’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                                          ^~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:42: error: expected ‘)’ before ‘any_unspecified_message’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In lambda function:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:790:11: error: ‘extract_payload_for_message_transformation’ is not a member of ‘so_5::enveloped_msg’
           extract_payload_for_message_transformation(
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In lambda function:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:840:11: error: ‘extract_payload_for_message_transformation’ is not a member of ‘so_5::enveloped_msg’
           extract_payload_for_message_transformation(
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp: In function ‘so_5::intrusive_ptr_t<T> so_5::make_agent_ref(Derived*)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:23: error: ‘is_base_of_v’ is not a member of ‘std’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                       ^~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:23: note: suggested alternative: ‘is_base_of’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                       ^~~~~~~~~~~~
                       is_base_of
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:44: error: expected primary-expression before ‘,’ token
   static_assert( std::is_base_of_v< agent_t, Derived >,
                                            ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:46: error: expected string-literal before ‘Derived’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                                              ^~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:46: error: expected ‘)’ before ‘Derived’
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp: In member function ‘void so_5::coop_t::add_reg_notificator(Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:584:12: error: ‘is_nothrow_invocable_v’ is not a member of ‘std’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:584:12: note: suggested alternative: ‘__is_nothrow_invocable’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
            __is_nothrow_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:585:15: error: expected primary-expression before ‘,’ token
         Lambda,
               ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:586:9: error: expected string-literal before ‘environment_t’
         environment_t &,
         ^~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:586:9: error: expected ‘)’ before ‘environment_t’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp: In member function ‘void so_5::coop_t::add_dereg_notificator(Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:674:12: error: ‘is_nothrow_invocable_v’ is not a member of ‘std’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:674:12: note: suggested alternative: ‘__is_nothrow_invocable’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
            __is_nothrow_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:675:15: error: expected primary-expression before ‘,’ token
         Lambda,
               ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:676:9: error: expected string-literal before ‘environment_t’
         environment_t &,
         ^~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:676:9: error: expected ‘)’ before ‘environment_t’
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp: In member function ‘decltype(auto) so_5::details::introduce_coop_helper_t::build_and_register_coop(so_5::disp_binder_shptr_t, Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1710:28: error: ‘invoke_result_t’ in namespace ‘std’ does not name a template type
   using return_type = std::invoke_result_t<Lambda, so_5::coop_t &>;
                            ^~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:22: error: ‘is_void_v’ is not a member of ‘std’
   if constexpr( std::is_void_v<return_type> )
                      ^~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:22: note: suggested alternative: ‘is_void’
   if constexpr( std::is_void_v<return_type> )
                      ^~~~~~~~~
                      is_void
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:32: error: ‘return_type’ was not declared in this scope
   if constexpr( std::is_void_v<return_type> )
                                ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:45: error: expected primary-expression before ‘)’ token
   if constexpr( std::is_void_v<return_type> )
                                             ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:27: error: ‘is_reference_v’ is not a member of ‘std’
   else if constexpr( std::is_reference_v<return_type> )
                           ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:27: note: suggested alternative: ‘is_reference’
   else if constexpr( std::is_reference_v<return_type> )
                           ^~~~~~~~~~~~~~
                           is_reference
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:55: error: expected primary-expression before ‘)’ token
   else if constexpr( std::is_reference_v<return_type> )
                                                       ^
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:25:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/make_mchain.hpp:16,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:12,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:33:14: error: ‘string_view’ in namespace ‘std’ does not name a type
   const std::string_view m_what;
              ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:37:15: error: ‘string_view’ in namespace ‘std’ does not name a type
    const std::string_view what,
               ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: In constructor ‘so_5::details::ios_helpers::length_limited_string::length_limited_string(int, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:39:6: error: class ‘so_5::details::ios_helpers::length_limited_string’ does not have any field named ‘m_what’
    : m_what( what )
      ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: In function ‘std::ostream& so_5::details::ios_helpers::operator<<(std::ostream&, const so_5::details::ios_helpers::length_limited_string&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:47:9: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
   if( v.m_what.size() > v.m_limit )
         ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:51:13: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
     to << v.m_what.substr( 0, median )
             ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:53:11: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
      << v.m_what.substr( v.m_what.size() - median + 3 );
           ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:53:28: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
      << v.m_what.substr( v.m_what.size() - median + 3 );
                            ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:56:12: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
    to << v.m_what;
            ^~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/make_mchain.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:12,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:57:11: error: ‘optional’ does not name a type
   virtual optional<current_thread_id_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:60:11: error: ‘optional’ does not name a type
   virtual optional<const agent_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:63:11: error: ‘optional’ does not name a type
   virtual optional<std::type_index>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:66:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::msg_source_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:69:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::message_or_signal_flag_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:72:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::message_instance_info_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:75:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::compound_action_description_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:78:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::impl::event_handler_data_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:110:3: error: ‘optional’ does not name a type
   optional<current_thread_id_t> m_tid;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:111:3: error: ‘optional’ does not name a type
   optional<const agent_t *> m_agent;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:112:3: error: ‘optional’ does not name a type
   optional<std::type_index> m_msg_type;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:113:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::msg_source_t> m_msg_source;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:114:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::message_or_signal_flag_t> m_message_or_signal;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:115:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::message_instance_info_t> m_message_instance_info;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:116:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::compound_action_description_t> m_compound_action;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:117:3: error: ‘optional’ does not name a type
   optional<const so_5::impl::event_handler_data_t *> m_event_handler_data_ptr;
   ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/rt.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:15,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:240:3: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   handling_result_t
   ^~~~~~~~~~~~~~~~~
   mchain_send_result_t
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:319:3: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   handling_result_t
   ^~~~~~~~~~~~~~~~~
   mchain_send_result_t
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/rt.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:15,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp: In member function ‘void so_5::mchain_props::details::select_actions_performer_t<Holder>::handle_ready_chain(so_5::mchain_props::select_case_t*)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:1318:12: error: ‘visit’ is not a member of ‘std’
       std::visit(
            ^~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:1320:18: error: ‘class so_5::mchain_props::select_case_t’ has no member named ‘try_handle’
         current->try_handle( m_notificator ) );
                  ^~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:25:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:116:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:143:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp: In function ‘so_5::disp::one_thread::dispatcher_handle_t so_5::disp::one_thread::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:167:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, disp_params_t{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:167:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, disp_params_t{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:26:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:200:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:228:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp: In function ‘so_5::disp::active_obj::dispatcher_handle_t so_5::disp::active_obj::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:254:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:254:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:27:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:236:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:264:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp: In function ‘so_5::disp::active_group::dispatcher_handle_t so_5::disp::active_group::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:290:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:290:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:28:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: error: ‘is_invocable_v’ is not a member of ‘std’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: error: ‘is_invocable_v’ is not a member of ‘std’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:49: error: template argument 1 is invalid
     std::is_invocable_v< Setter, bind_params_t& >,
                                                 ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:50: error: expected unqualified-id before ‘,’ token
     std::is_invocable_v< Setter, bind_params_t& >,
                                                  ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:436:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:467:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: In function ‘so_5::disp::thread_pool::dispatcher_handle_t so_5::disp::thread_pool::make_dispatcher(so_5::environment_t&, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:500:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:500:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
                                     stringstream
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: In function ‘so_5::disp::thread_pool::dispatcher_handle_t so_5::disp::thread_pool::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:533:10: error: ‘string_view’ is not a member of ‘std’
     std::string_view{},
          ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:533:10: note: suggested alternative: ‘stringstream’
     std::string_view{},
          ^~~~~~~~~~~
          stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:29:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: error: ‘is_invocable_v’ is not a member of ‘std’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: error: ‘is_invocable_v’ is not a member of ‘std’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:49: error: template argument 1 is invalid
     std::is_invocable_v< Setter, bind_params_t& >,
                                                 ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:50: error: expected unqualified-id before ‘,’ token
     std::is_invocable_v< Setter, bind_params_t& >,
                                                  ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:422:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:453:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp: In function ‘so_5::disp::adv_thread_pool::dispatcher_handle_t so_5::disp::adv_thread_pool::make_dispatcher(so_5::environment_t&, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:486:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:486:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:30:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:207:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:237:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp: In function ‘so_5::disp::prio_one_thread::strictly_ordered::dispatcher_handle_t so_5::disp::prio_one_thread::strictly_ordered::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:264:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:264:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:31:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:212:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:246:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp: In function ‘so_5::disp::prio_one_thread::quoted_round_robin::dispatcher_handle_t so_5::disp::prio_one_thread::quoted_round_robin::make_dispatcher(so_5::environment_t&, const so_5::disp::prio_one_thread::quoted_round_robin::quotes_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:286:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, quotes );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:286:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, quotes );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:32:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:208:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:238:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp: In function ‘so_5::disp::prio_dedicated_threads::one_per_prio::dispatcher_handle_t so_5::disp::prio_dedicated_threads::one_per_prio::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:266:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:266:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
make[2]: *** [CMakeFiles/test_package.dir/test_package.cpp.o] Error 1
make[1]: *** [CMakeFiles/test_package.dir/all] Error 2
make: *** [all] Error 2
so5extra/1.5.2 (test package): WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior
so5extra/1.5.2 (test package): WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior
ERROR: so5extra/1.5.2 (test package): Error in build() method, line 21
	cmake.build()
	ConanException: Error 2 while executing cmake --build "/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/build/Release" '--' '-j3'
********************************************************************************
conan test cci-c81bdd30/recipes/so5extra/all/test_v1_package/conanfile.py so5extra/1.5.2@#fa8dd7710f2b6cfd84ddeea7e3bb9efc -pr /home/conan/w/prod-v1/bsr/1793/abdfb/profile_linux_7_libstdcpp11_gcc_release_64..txt -c tools.system.package_manager:mode=install -c tools.system.package_manager:sudo=True
********************************************************************************
Configuration:
[settings]
arch=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=7
os=Linux
[options]
[build_requires]
[env]
[conf]
tools.system.package_manager:mode=install
tools.system.package_manager:sudo=True

so5extra/1.5.2 (test package): Installing package
Requirements
    so5extra/1.5.2 from local cache - Cache
    sobjectizer/5.7.4 from 'conan-center' - Cache
Packages
    so5extra/1.5.2:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache
    sobjectizer/5.7.4:66c5327ebdcecae0a01a863939964495fa019a06 - Cache

Installing (downloading, building) binaries...
sobjectizer/5.7.4: Already installed!
so5extra/1.5.2: Already installed!
so5extra/1.5.2 (test package): Generator cmake created conanbuildinfo.cmake
so5extra/1.5.2 (test package): Generator txt created conanbuildinfo.txt
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created so5extra-config-version.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created so5extraTarget-release.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created so5extraTargets.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created so5extra-config.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created sobjectizer-config-version.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created sobjectizerTarget-release.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created sobjectizerTargets.cmake
so5extra/1.5.2 (test package): Generator cmake_find_package_multi created sobjectizer-config.cmake
so5extra/1.5.2 (test package): Aggregating env generators
so5extra/1.5.2 (test package): Generated conaninfo.txt
so5extra/1.5.2 (test package): Generated graphinfo
Using lockfile: '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867/conan.lock'
Using cached profile from lockfile
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
so5extra/1.5.2 (test package): Calling build()

----Running------
> cd '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867' && cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE="Release" -DCONAN_IN_LOCAL_CACHE="OFF" -DCONAN_COMPILER="gcc" -DCONAN_COMPILER_VERSION="7" -DCONAN_CXX_FLAGS="-m64" -DCONAN_SHARED_LINKER_FLAGS="-m64" -DCONAN_C_FLAGS="-m64" -DCONAN_LIBCXX="libstdc++11" -DCMAKE_INSTALL_PREFIX="/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867/package" -DCMAKE_INSTALL_BINDIR="bin" -DCMAKE_INSTALL_SBINDIR="bin" -DCMAKE_INSTALL_LIBEXECDIR="bin" -DCMAKE_INSTALL_LIBDIR="lib" -DCMAKE_INSTALL_INCLUDEDIR="include" -DCMAKE_INSTALL_OLDINCLUDEDIR="include" -DCMAKE_INSTALL_DATAROOTDIR="share" -DCMAKE_PREFIX_PATH="/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867" -DCMAKE_MODULE_PATH="/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867" -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY="ON" -DCONAN_EXPORTED="1" -Wno-dev '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package'
-----------------
-- The CXX compiler identification is GNU 7.5.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: called by CMake conan helper
-- Conan: Adjusting output directories
-- Conan: Using cmake targets configuration
-- Library so_s.5.7.4 found /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/lib/libso_s.5.7.4.a
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Conan: Compiler GCC>=5, checking major version 7
-- Conan: Checking correct version: 7
-- Conan: C++ stdlib: libstdc++11
-- Library so_s.5.7.4 found /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/lib/libso_s.5.7.4.a
-- Found: /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/lib/libso_s.5.7.4.a
-- Library so_s.5.7.4 found /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/lib/libso_s.5.7.4.a
-- Found: /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/lib/libso_s.5.7.4.a
-- Configuring done
-- Generating done
-- Build files have been written to: /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867

----Running------
> cmake --build '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867' '--' '-j3'
-----------------
Scanning dependencies of target test_package
[ 50%] Building CXX object CMakeFiles/test_package.dir/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp.o
CMakeFiles/test_package.dir/build.make:81: recipe for target 'CMakeFiles/test_package.dir/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp.o' failed
CMakeFiles/Makefile2:94: recipe for target 'CMakeFiles/test_package.dir/all' failed
Makefile:102: recipe for target 'all' failed
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_INSTALL_BINDIR
    CMAKE_INSTALL_DATAROOTDIR
    CMAKE_INSTALL_INCLUDEDIR
    CMAKE_INSTALL_LIBDIR
    CMAKE_INSTALL_LIBEXECDIR
    CMAKE_INSTALL_OLDINCLUDEDIR
    CMAKE_INSTALL_SBINDIR


In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mbox_fwd.hpp:15:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mbox.hpp:24,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain.hpp:14,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/atomic_refcounted.hpp:313:79: error: expected constructor, destructor, or type conversion before ‘;’ token
 template<typename T> intrusive_ptr_t(std::unique_ptr<T>) -> intrusive_ptr_t<T>;
                                                                               ^
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/handler_makers.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:15,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:179:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)()>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() noexcept >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:164:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)()>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:187:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)() const>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() const noexcept >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:171:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)0, Result (Agent::*)() const>’
 struct is_agent_method_pointer< method_arity::nullary, Result (Agent::*)() const >
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:209:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument)>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) noexcept>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:195:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument)>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument)>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:216:8: error: redefinition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument) const>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) const noexcept>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_handler_format_detector.hpp:202:8: note: previous definition of ‘struct so_5::details::is_agent_method_pointer<(so_5::details::method_arity)1, Result (Agent::*)(Handler_Argument) const>’
 struct is_agent_method_pointer<method_arity::unary, Result (Agent::*)(Handler_Argument) const>
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select_ifaces.hpp:149:34: error: ‘variant’ in namespace ‘std’ does not name a template type
   using handling_result_t = std::variant<
                                  ^~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select_ifaces.hpp:248:11: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   virtual handling_result_t
           ^~~~~~~~~~~~~~~~~
           mchain_send_result_t
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:19:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:22,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/optional.hpp:19:12: error: ‘std::optional’ has not been declared
 using std::optional;
            ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:255:11: error: ‘optional’ does not name a type
   virtual optional<current_thread_id_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:259:11: error: ‘optional’ does not name a type
   virtual optional<std::type_index>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:263:11: error: ‘optional’ does not name a type
   virtual optional<msg_source_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:267:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::agent_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:271:11: error: ‘optional’ does not name a type
   virtual optional<message_or_signal_flag_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:275:11: error: ‘optional’ does not name a type
   virtual optional<message_instance_info_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:279:11: error: ‘optional’ does not name a type
   virtual optional<compound_action_description_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/msg_tracing.hpp:283:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::impl::event_handler_data_t *>
           ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_tuning_options.hpp:16,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_context.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:30,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/enveloped_msg.hpp:229:1: error: ‘optional’ does not name a type
 optional< payload_info_t >
 ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/enveloped_msg.hpp:254:1: error: ‘optional’ does not name a type
 optional< message_ref_t >
 ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_tuning_options.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent_context.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:30,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In static member function ‘static so_5::message_limit::transform_indicator_t<Arg> so_5::message_limit::message_limit_methods_mixin_t::limit_then_transform(unsigned int, Lambda)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:26: error: ‘is_same_v’ is not a member of ‘std’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                          ^~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:26: note: suggested alternative: ‘is_same’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                          ^~~~~~~~~
                          is_same
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:40: error: expected primary-expression before ‘,’ token
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                                        ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:42: error: expected string-literal before ‘any_unspecified_message’
     static_assert( !std::is_same_v< Arg, any_unspecified_message >,
                                          ^~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:770:42: error: expected ‘)’ before ‘any_unspecified_message’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In lambda function:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:790:11: error: ‘extract_payload_for_message_transformation’ is not a member of ‘so_5::enveloped_msg’
           extract_payload_for_message_transformation(
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp: In lambda function:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/message_limit.hpp:840:11: error: ‘extract_payload_for_message_transformation’ is not a member of ‘so_5::enveloped_msg’
           extract_payload_for_message_transformation(
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:21:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp: In function ‘so_5::intrusive_ptr_t<T> so_5::make_agent_ref(Derived*)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:23: error: ‘is_base_of_v’ is not a member of ‘std’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                       ^~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:23: note: suggested alternative: ‘is_base_of’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                       ^~~~~~~~~~~~
                       is_base_of
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:44: error: expected primary-expression before ‘,’ token
   static_assert( std::is_base_of_v< agent_t, Derived >,
                                            ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:46: error: expected string-literal before ‘Derived’
   static_assert( std::is_base_of_v< agent_t, Derived >,
                                              ^~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/agent.hpp:3160:46: error: expected ‘)’ before ‘Derived’
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:32:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp: In member function ‘void so_5::coop_t::add_reg_notificator(Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:584:12: error: ‘is_nothrow_invocable_v’ is not a member of ‘std’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:584:12: note: suggested alternative: ‘__is_nothrow_invocable’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
            __is_nothrow_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:585:15: error: expected primary-expression before ‘,’ token
         Lambda,
               ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:586:9: error: expected string-literal before ‘environment_t’
         environment_t &,
         ^~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:586:9: error: expected ‘)’ before ‘environment_t’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp: In member function ‘void so_5::coop_t::add_dereg_notificator(Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:674:12: error: ‘is_nothrow_invocable_v’ is not a member of ‘std’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:674:12: note: suggested alternative: ‘__is_nothrow_invocable’
       std::is_nothrow_invocable_v<
            ^~~~~~~~~~~~~~~~~~~~~~
            __is_nothrow_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:675:15: error: expected primary-expression before ‘,’ token
         Lambda,
               ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:676:9: error: expected string-literal before ‘environment_t’
         environment_t &,
         ^~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/coop.hpp:676:9: error: expected ‘)’ before ‘environment_t’
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/mchain_details.hpp:17:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:11,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp: In member function ‘decltype(auto) so_5::details::introduce_coop_helper_t::build_and_register_coop(so_5::disp_binder_shptr_t, Lambda&&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1710:28: error: ‘invoke_result_t’ in namespace ‘std’ does not name a template type
   using return_type = std::invoke_result_t<Lambda, so_5::coop_t &>;
                            ^~~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:22: error: ‘is_void_v’ is not a member of ‘std’
   if constexpr( std::is_void_v<return_type> )
                      ^~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:22: note: suggested alternative: ‘is_void’
   if constexpr( std::is_void_v<return_type> )
                      ^~~~~~~~~
                      is_void
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:32: error: ‘return_type’ was not declared in this scope
   if constexpr( std::is_void_v<return_type> )
                                ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1712:45: error: expected primary-expression before ‘)’ token
   if constexpr( std::is_void_v<return_type> )
                                             ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:27: error: ‘is_reference_v’ is not a member of ‘std’
   else if constexpr( std::is_reference_v<return_type> )
                           ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:27: note: suggested alternative: ‘is_reference’
   else if constexpr( std::is_reference_v<return_type> )
                           ^~~~~~~~~~~~~~
                           is_reference
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/environment.hpp:1717:55: error: expected primary-expression before ‘)’ token
   else if constexpr( std::is_reference_v<return_type> )
                                                       ^
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:25:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/make_mchain.hpp:16,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:12,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:33:14: error: ‘string_view’ in namespace ‘std’ does not name a type
   const std::string_view m_what;
              ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:37:15: error: ‘string_view’ in namespace ‘std’ does not name a type
    const std::string_view what,
               ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: In constructor ‘so_5::details::ios_helpers::length_limited_string::length_limited_string(int, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:39:6: error: class ‘so_5::details::ios_helpers::length_limited_string’ does not have any field named ‘m_what’
    : m_what( what )
      ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp: In function ‘std::ostream& so_5::details::ios_helpers::operator<<(std::ostream&, const so_5::details::ios_helpers::length_limited_string&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:47:9: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
   if( v.m_what.size() > v.m_limit )
         ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:51:13: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
     to << v.m_what.substr( 0, median )
             ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:53:11: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
      << v.m_what.substr( v.m_what.size() - median + 3 );
           ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:53:28: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
      << v.m_what.substr( v.m_what.size() - median + 3 );
                            ^~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/details/ios_helpers.hpp:56:12: error: ‘const struct so_5::details::ios_helpers::length_limited_string’ has no member named ‘m_what’
    to << v.m_what;
            ^~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/make_mchain.hpp:16:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/so5extra/1.5.2/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/so_5_extra/mchains/fixed_size.hpp:12,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:5:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:57:11: error: ‘optional’ does not name a type
   virtual optional<current_thread_id_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:60:11: error: ‘optional’ does not name a type
   virtual optional<const agent_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:63:11: error: ‘optional’ does not name a type
   virtual optional<std::type_index>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:66:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::msg_source_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:69:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::message_or_signal_flag_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:72:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::message_instance_info_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:75:11: error: ‘optional’ does not name a type
   virtual optional<so_5::msg_tracing::compound_action_description_t>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:78:11: error: ‘optional’ does not name a type
   virtual optional<const so_5::impl::event_handler_data_t *>
           ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:110:3: error: ‘optional’ does not name a type
   optional<current_thread_id_t> m_tid;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:111:3: error: ‘optional’ does not name a type
   optional<const agent_t *> m_agent;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:112:3: error: ‘optional’ does not name a type
   optional<std::type_index> m_msg_type;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:113:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::msg_source_t> m_msg_source;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:114:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::message_or_signal_flag_t> m_message_or_signal;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:115:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::message_instance_info_t> m_message_instance_info;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:116:3: error: ‘optional’ does not name a type
   optional<so_5::msg_tracing::compound_action_description_t> m_compound_action;
   ^~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/impl/msg_tracing_helpers.hpp:117:3: error: ‘optional’ does not name a type
   optional<const so_5::impl::event_handler_data_t *> m_event_handler_data_ptr;
   ^~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/rt.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:15,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:240:3: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   handling_result_t
   ^~~~~~~~~~~~~~~~~
   mchain_send_result_t
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:319:3: error: ‘handling_result_t’ does not name a type; did you mean ‘mchain_send_result_t’?
   handling_result_t
   ^~~~~~~~~~~~~~~~~
   mchain_send_result_t
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/rt.hpp:22:0,
                 from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:15,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp: In member function ‘void so_5::mchain_props::details::select_actions_performer_t<Holder>::handle_ready_chain(so_5::mchain_props::select_case_t*)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:1318:12: error: ‘visit’ is not a member of ‘std’
       std::visit(
            ^~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/mchain_select.hpp:1320:18: error: ‘class so_5::mchain_props::select_case_t’ has no member named ‘try_handle’
         current->try_handle( m_notificator ) );
                  ^~~~~~~~~~
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:25:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:116:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:143:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp: In function ‘so_5::disp::one_thread::dispatcher_handle_t so_5::disp::one_thread::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:167:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, disp_params_t{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/one_thread/pub.hpp:167:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, disp_params_t{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:26:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:200:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:228:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp: In function ‘so_5::disp::active_obj::dispatcher_handle_t so_5::disp::active_obj::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:254:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_obj/pub.hpp:254:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:27:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:236:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:264:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp: In function ‘so_5::disp::active_group::dispatcher_handle_t so_5::disp::active_group::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:290:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/active_group/pub.hpp:290:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:28:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: error: ‘is_invocable_v’ is not a member of ‘std’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: error: ‘is_invocable_v’ is not a member of ‘std’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:49: error: template argument 1 is invalid
     std::is_invocable_v< Setter, bind_params_t& >,
                                                 ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:368:50: error: expected unqualified-id before ‘,’ token
     std::is_invocable_v< Setter, bind_params_t& >,
                                                  ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:436:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:467:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: In function ‘so_5::disp::thread_pool::dispatcher_handle_t so_5::disp::thread_pool::make_dispatcher(so_5::environment_t&, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:500:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:500:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
                                     stringstream
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp: In function ‘so_5::disp::thread_pool::dispatcher_handle_t so_5::disp::thread_pool::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:533:10: error: ‘string_view’ is not a member of ‘std’
     std::string_view{},
          ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/thread_pool/pub.hpp:533:10: note: suggested alternative: ‘stringstream’
     std::string_view{},
          ^~~~~~~~~~~
          stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:29:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: error: ‘is_invocable_v’ is not a member of ‘std’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: error: ‘is_invocable_v’ is not a member of ‘std’
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:10: note: suggested alternative: ‘__is_invocable’
     std::is_invocable_v< Setter, bind_params_t& >,
          ^~~~~~~~~~~~~~
          __is_invocable
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:49: error: template argument 1 is invalid
     std::is_invocable_v< Setter, bind_params_t& >,
                                                 ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:354:50: error: expected unqualified-id before ‘,’ token
     std::is_invocable_v< Setter, bind_params_t& >,
                                                  ^
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:422:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:453:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp: In function ‘so_5::disp::adv_thread_pool::dispatcher_handle_t so_5::disp::adv_thread_pool::make_dispatcher(so_5::environment_t&, std::size_t)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:486:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/adv_thread_pool/pub.hpp:486:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, thread_count );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:30:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:207:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:237:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp: In function ‘so_5::disp::prio_one_thread::strictly_ordered::dispatcher_handle_t so_5::disp::prio_one_thread::strictly_ordered::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:264:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/strictly_ordered/pub.hpp:264:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:31:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:212:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:246:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp: In function ‘so_5::disp::prio_one_thread::quoted_round_robin::dispatcher_handle_t so_5::disp::prio_one_thread::quoted_round_robin::make_dispatcher(so_5::environment_t&, const so_5::disp::prio_one_thread::quoted_round_robin::quotes_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:286:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{}, quotes );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_one_thread/quoted_round_robin/pub.hpp:286:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{}, quotes );
                                     ^~~~~~~~~~~
                                     stringstream
In file included from /home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/all.hpp:32:0,
                 from /home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp:7:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp: At global scope:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:208:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base,
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:238:13: error: ‘string_view’ in namespace ‘std’ does not name a type
  const std::string_view data_sources_name_base )
             ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp: In function ‘so_5::disp::prio_dedicated_threads::one_per_prio::dispatcher_handle_t so_5::disp::prio_dedicated_threads::one_per_prio::make_dispatcher(so_5::environment_t&)’:
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:266:37: error: ‘string_view’ is not a member of ‘std’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
/home/conan/w/prod-v1/bsr/1793/bbdbc/.conan/data/sobjectizer/5.7.4/_/_/package/66c5327ebdcecae0a01a863939964495fa019a06/include/so_5/disp/prio_dedicated_threads/one_per_prio/pub.hpp:266:37: note: suggested alternative: ‘stringstream’
   return make_dispatcher( env, std::string_view{} );
                                     ^~~~~~~~~~~
                                     stringstream
make[2]: *** [CMakeFiles/test_package.dir/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_package/test_package.cpp.o] Error 1
make[1]: *** [CMakeFiles/test_package.dir/all] Error 2
make: *** [all] Error 2
ERROR: so5extra/1.5.2 (test package): Error in build() method, line 12
	cmake.build()
	ConanException: Error 2 while executing cmake --build '/home/conan/w/prod-v1/bsr/cci-c81bdd30/recipes/so5extra/all/test_v1_package/build/ac8e5b135bec2d2511377cc6fdda763812fc2867' '--' '-j3'