build: add support to warning flags for MSVC

Author: threeal

error/CMakeLists.txt

@@ -2,7 +2,12 @@ cmake_minimum_required(VERSION 3.0)
 
 project(error)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wnon-virtual-dtor -Wpedantic")
+if(MSVC)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /permissive- /W4 /w14640 /EHsc")
+else()
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wnon-virtual-dtor -Wpedantic")
+endif()
+
 set(CMAKE_CXX_STANDARD 11)
 
 include(cmake/CPM.cmake)