Build: Use C++23 across the board

CMakeModules/DuckStationCompilerRequirement.cmake

@@ -4,19 +4,19 @@
 # NOTE: In addition to the terms of CC-BY-NC-ND-4.0, you may not use this file to create
 # packages or build recipes without explicit permission from the copyright holder.
 
-# Use C++20.
-set(CMAKE_CXX_STANDARD 20)
+# Use C++23.
+set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-# C++20 feature checks. Some Linux environments are incomplete.
-check_cpp20_feature("__cpp_structured_bindings" 201606)
-check_cpp20_feature("__cpp_constinit" 201907)
-check_cpp20_feature("__cpp_designated_initializers" 201707)
-check_cpp20_feature("__cpp_using_enum" 201907)
-check_cpp20_feature("__cpp_lib_bit_cast" 201806)
-check_cpp20_feature("__cpp_lib_bitops" 201907)
-check_cpp20_feature("__cpp_lib_int_pow2" 202002)
-check_cpp20_feature("__cpp_lib_starts_ends_with" 201711)
-check_cpp20_attribute("likely" 201803)
-check_cpp20_attribute("unlikely" 201803)
-check_cpp20_attribute("no_unique_address" 201803)
+# C++ feature checks. Some Linux environments are incomplete.
+check_cpp_feature("__cpp_structured_bindings" 201606)
+check_cpp_feature("__cpp_constinit" 201907)
+check_cpp_feature("__cpp_designated_initializers" 201707)
+check_cpp_feature("__cpp_using_enum" 201907)
+check_cpp_feature("__cpp_lib_bit_cast" 201806)
+check_cpp_feature("__cpp_lib_bitops" 201907)
+check_cpp_feature("__cpp_lib_int_pow2" 202002)
+check_cpp_feature("__cpp_lib_starts_ends_with" 201711)
+check_cpp_attribute("likely" 201803)
+check_cpp_attribute("unlikely" 201803)
+check_cpp_attribute("no_unique_address" 201803)

CMakeModules/DuckStationUtils.cmake

@@ -250,8 +250,8 @@ function(add_debug_symbol_flag var)
   endif()
 endfunction()
 
-function(check_cpp20_feature MACRO MINIMUM_VALUE)
-  set(CACHE_VAR "CHECK_CPP20_FEATURE_${MACRO}")
+function(check_cpp_feature MACRO MINIMUM_VALUE)
+  set(CACHE_VAR "CHECK_CPP_FEATURE_${MACRO}")
   if(NOT DEFINED ${CACHE_VAR})
     # Create a small source code snippet that fails to compile if the feature is not available.
     set(TEMP_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cpp")
@@ -263,7 +263,7 @@ function(check_cpp20_feature MACRO MINIMUM_VALUE)
     set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
     try_compile(HAS_FEATURE
       ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY} "${TEMP_FILE}"
-      CXX_STANDARD 20
+      CXX_STANDARD 23
       CXX_STANDARD_REQUIRED TRUE
     )
     set(${CACHE_VAR} ${HAS_FEATURE} CACHE INTERNAL "Cached feature test result for ${MACRO}")
@@ -273,8 +273,8 @@ function(check_cpp20_feature MACRO MINIMUM_VALUE)
   endif()
 endfunction()
 
-function(check_cpp20_attribute ATTRIBUTE MINIMUM_VALUE)
-  set(CACHE_VAR "CHECK_CPP20_ATTRIBUTE_${MACRO}")
+function(check_cpp_attribute ATTRIBUTE MINIMUM_VALUE)
+  set(CACHE_VAR "CHECK_CPP_ATTRIBUTE_${MACRO}")
   if(NOT DEFINED ${CACHE_VAR})
     set(TEMP_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cpp")
     file(WRITE "${TEMP_FILE}" "#include <version>
@@ -285,7 +285,7 @@ function(check_cpp20_attribute ATTRIBUTE MINIMUM_VALUE)
     set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
     try_compile(HAS_FEATURE
       ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY} "${TEMP_FILE}"
-      CXX_STANDARD 20
+      CXX_STANDARD 23
       CXX_STANDARD_REQUIRED TRUE
     )
     set(${CACHE_VAR} ${HAS_FEATURE} CACHE INTERNAL "Cached attribute test result for ${MACRO}")

dep/vsprops/Base.props

@@ -25,7 +25,7 @@
       <SDLCheck>true</SDLCheck>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
-      <LanguageStandard>stdcpp20</LanguageStandard>
+      <LanguageStandard>stdcpp23</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
       <ConformanceMode>true</ConformanceMode>
       <PreprocessorDefinitions>_HAS_EXCEPTIONS=0;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;WIN32;%(PreprocessorDefinitions)</PreprocessorDefinitions>