first impl. but wrong.

CMakeLists.txt

@@ -0,0 +1,47 @@
+cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
+
+project(crdt_tests CXX C)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+if(NOT CMAKE_BUILD_TYPE)
+	set(CMAKE_BUILD_TYPE "Debug")
+endif()
+
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+#option(BUILD_TESTING "Enable testing with ctest." OFF)
+
+add_subdirectory(./external/json)
+
+# Bump up warning levels appropriately for clang, gcc & msvc
+if (${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
+
+	#link_libraries(-fsanitize=address)
+elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
+	if (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
+		string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+	else()
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+	endif()
+endif()
+
+########################################
+
+add_executable(test1
+	./test1.cpp
+)
+
+target_compile_features(test1 PUBLIC cxx_std_17)
+
+target_link_libraries(test1 PUBLIC
+	nlohmann_json::nlohmann_json
+)
+