id summary reporter owner description type status milestone component version severity resolution keywords cc 13351 Unable to compile a project using recursive variant under MSVC 2017 15.5 with compiler switch /std:c++17 and /std:c++latest jhruby.web@… ebf "15.4 compiler compiles with all flags std flags without any issues. 15.5 version is unable to compile correctly /std:c++17 and /std:c++latest. Check out the library: https//github.com/no1msd/mstch Configure CMAKE and CMAKE_CXX_FLAGS += /std:c++17 After opening project under visual studio compilation fails: compiler-output.txt Please note that switches /std:c++11 and /std:c++14 are working correctly. Thanks" Bugs closed To Be Determined variant Boost 1.67.0 Problem fixed