Fix C++20 test errors

Author: phprus

test/CMakeLists.txt

@@ -3,6 +3,15 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 set(PARSE_CATCH_TESTS_ADD_TO_CONFIGURE_DEPENDS ON)
 include(ParseAndAddCatchTests)
 
+function(SetTestCompileOptions target_name)
+    target_compile_options(${target_name} PRIVATE
+        $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror -Wno-deprecated-declarations>
+        $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Wno-psabi -Werror -Wno-deprecated-declarations>
+        $<$<CXX_COMPILER_ID:MSVC>:/WX /wd4996>
+        $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
+endfunction()
+
 if(GHC_COVERAGE)
     message("Generating test runner for coverage run...")
     set(CMAKE_EXE_LINKER_FLAGS "${CMCMAKE_EXE_LINKER_FLAGS} --coverage") 
@@ -23,12 +32,7 @@ else()
     message("Generating test runner for normal test...")
     add_executable(filesystem_test filesystem_test.cpp catch.hpp)
     target_link_libraries(filesystem_test ghc_filesystem)
-    target_compile_options(filesystem_test PRIVATE
-        $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
-        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror>
-        $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Wno-psabi -Werror>
-        $<$<CXX_COMPILER_ID:MSVC>:/WX>
-        $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
+    SetTestCompileOptions(filesystem_test)
     if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
         target_compile_definitions(filesystem_test PRIVATE _CRT_SECURE_NO_WARNINGS WIN32_LEAN_AND_MEAN NOMINMAX)
     endif()
@@ -42,10 +46,7 @@ else()
     if(WIN32)
         add_executable(filesystem_test_char filesystem_test.cpp catch.hpp)
         target_link_libraries(filesystem_test_char ghc_filesystem)
-        target_compile_options(filesystem_test_char PRIVATE
-            $<$<CXX_COMPILER_ID:Clang>:-Wall -Wextra -Werror>
-            $<$<CXX_COMPILER_ID:GNU>:-Wall -Werror>
-            $<$<CXX_COMPILER_ID:MSVC>:/WX>)
+        SetTestCompileOptions(filesystem_test_char)
         if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
 		target_compile_definitions(filesystem_test_char PRIVATE _CRT_SECURE_NO_WARNINGS GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE)
         else()
@@ -67,12 +68,7 @@ add_test(multifile_test multifile_test)
 
 add_executable(fwd_impl_test fwd_test.cpp impl_test.cpp)
 target_link_libraries(fwd_impl_test ghc_filesystem)
-target_compile_options(fwd_impl_test PRIVATE
-        $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
-        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror>
-        $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Wno-psabi -Werror>
-        $<$<CXX_COMPILER_ID:MSVC>:/WX>
-        $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
+SetTestCompileOptions(fwd_impl_test)
 if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
 	target_compile_definitions(fwd_impl_test PRIVATE _CRT_SECURE_NO_WARNINGS WIN32_LEAN_AND_MEAN NOMINMAX)
 endif()
@@ -83,9 +79,4 @@ if(NOT MSVC)
     target_compile_options(exception PRIVATE -fno-exceptions)
 endif()
 target_include_directories(exception PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../include)
-target_compile_options(exception PRIVATE
-        $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
-        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror>
-        $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Wno-psabi -Werror>
-        $<$<CXX_COMPILER_ID:MSVC>:/WX>
-        $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
+SetTestCompileOptions(exception)