Also test MSVC with /std:c++latest

CMakeLists.txt

@@ -45,6 +45,10 @@ option(CTI_CONTINUABLE_WITH_EXPERIMENTAL_COROUTINE
        "Enable co_await support"
        OFF)
 
+option(CTI_CONTINUABLE_WITH_CPP_LATEST
+       "Enable the highest C++ standard available for testing polyfills"
+       OFF)
+
 include(cmake/CMakeLists.txt)
 
 set(THREADS_PREFER_PTHREAD_FLAG ON)

appveyor.yml

@@ -4,7 +4,11 @@ image:
 environment:
   matrix:
     - WITH_NO_EXCEPTIONS: OFF
+      WITH_CPP_LATEST: OFF
     - WITH_NO_EXCEPTIONS: ON
+      WITH_CPP_LATEST: OFF
+    - WITH_NO_EXCEPTIONS: OFF
+      WITH_CPP_LATEST: ON
 
 configuration:
   - Debug
@@ -23,6 +27,7 @@ before_build:
          cmake -H. -Bbuild -A%PLATFORM%
          -DCTI_CONTINUABLE_WITH_NO_EXCEPTIONS=%WITH_NO_EXCEPTIONS%
          -DCTI_CONTINUABLE_WITH_EXPERIMENTAL_COROUTINE=ON
+         -DCTI_CONTINUABLE_WITH_CPP_LATEST=ON
 
 build_script:
   - cmd: cmake --build build --config %CONFIGURATION% --target ALL_BUILD -- /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" /verbosity:minimal /maxcpucount:2 /nologo

cmake/compiler/msvc.cmake

@@ -41,6 +41,16 @@ target_compile_options(continuable-features-warnings
   INTERFACE
     /W4)
 
+if (CTI_CONTINUABLE_WITH_CPP_LATEST)
+  target_compile_options(continuable-features-flags
+    INTERFACE
+      /std:c++latest)
+else()
+  target_compile_options(continuable-features-flags
+    INTERFACE
+      /std:c++14)
+endif()
+
 if (CTI_CONTINUABLE_WITH_NO_EXCEPTIONS)
   target_compile_definitions(continuable-features-noexcept
     INTERFACE

test/playground/CMakeLists.txt

@@ -18,11 +18,10 @@ source_group(test FILES ${TEST})
 target_link_libraries(test-playground
   PRIVATE
     gtest
-    continuable)
-
-target_compile_definitions(test-playground
-  PUBLIC
-    -DCONTINUABLE_WITH_NO_EXCEPTIONS)
+    continuable
+    continuable-features-flags
+    continuable-features-warnings
+    continuable-features-noexcept)
 
 add_test(NAME continuable-playground-tests
   COMMAND test-playground)