build: Added some initial test code for C++ Modules

CMakeLists.txt

@@ -22,6 +22,7 @@ option(IMHEX_ENABLE_STD_ASSERTS         "Enable debug asserts in the C++ std lib
 option(IMHEX_ENABLE_UNIT_TESTS          "Enable building unit tests"                                                            OFF)
 option(IMHEX_ENABLE_PRECOMPILED_HEADERS "Enable precompiled headers"                                                            OFF)
 option(IMHEX_COMPRESS_DEBUG_INFO        "Compress debug information"                                                            ON )
+option(IMHEX_ENABLE_CXX_MODULES         "Enable C++20 Module compilation. Testing only!"                                        OFF)
 
 set(IMHEX_BASE_FOLDER "${CMAKE_CURRENT_SOURCE_DIR}")
 set(CMAKE_MODULE_PATH "${IMHEX_BASE_FOLDER}/cmake/modules")

cmake/build_helpers.cmake

@@ -639,6 +639,7 @@ macro(setupCompilerFlags target)
         addCommonFlag("/wd4267" ${target}) # 'var': conversion from 'size_t' to 'type', possible loss of data
         addCommonFlag("/wd4305" ${target}) # truncation from 'double' to 'float'
         addCommonFlag("/wd4996" ${target}) # 'function': was declared deprecated
+        addCommonFlag("/wd5244" ${target}) # 'include' in the purview of module 'module' appears erroneous
 
         if (IMHEX_STRICT_WARNINGS)
             addCommonFlag("/WX" ${target})

lib/libimhex/CMakeLists.txt

@@ -82,6 +82,15 @@ else()
         add_library(libimhex SHARED ${LIBIMHEX_SOURCES})
     endif()
 
+    if (IMHEX_ENABLE_CXX_MODULES)
+        target_sources(libimhex
+                PUBLIC
+                FILE_SET cxx_modules TYPE CXX_MODULES
+                FILES
+                include/hex.cppm
+        )
+    endif()
+
     set(LIBIMHEX_LIBRARY_TYPE PUBLIC)
     target_compile_definitions(libimhex PRIVATE IMHEX_PROJECT_NAME="${PROJECT_NAME}")
 endif()

lib/libimhex/include/hex.cppm

@@ -0,0 +1,38 @@
+module;
+
+#include <cmath>
+#include <map>
+#include <string>
+#include <string_view>
+#include <vector>
+#include <exception>
+#include <algorithm>
+#include <locale>
+#include <array>
+#include <filesystem>
+#include <functional>
+#include <memory>
+#include <list>
+#include <atomic>
+#include <ranges>
+#include <fstream>
+#include <thread>
+
+#include <fmt/format.h>
+#include <nlohmann/json.hpp>
+
+export module hex;
+
+#define HEX_MODULE_EXPORT
+#include <hex/api/achievement_manager.hpp>
+#include <hex/api/content_registry.hpp>
+#include <hex/api/event_manager.hpp>
+#include <hex/api/imhex_api.hpp>
+#include <hex/api/layout_manager.hpp>
+#include <hex/api/localization_manager.hpp>
+#include <hex/api/plugin_manager.hpp>
+#include <hex/api/shortcut_manager.hpp>
+#include <hex/api/task_manager.hpp>
+#include <hex/api/theme_manager.hpp>
+#include <hex/api/tutorial_manager.hpp>
+#include <hex/api/workspace_manager.hpp>

lib/libimhex/include/hex.hpp

@@ -1,3 +1,9 @@
 #pragma once
 
 #include <hex/helpers/types.hpp>
+
+#if defined(HEX_MODULE_EXPORT)
+    #define EXPORT_MODULE export
+#else
+    #define EXPORT_MODULE
+#endif

lib/libimhex/include/hex/api/imhex_api.hpp

@@ -20,7 +20,7 @@ struct ImFontAtlas;
 struct ImFont;
 struct GLFWwindow;
 
-namespace hex {
+EXPORT_MODULE namespace hex {
 
     namespace impl {
         class AutoResetBase;
@@ -767,7 +767,7 @@ namespace hex {
             void loadFont(const std::fs::path &path, const std::vector<GlyphRange> &glyphRanges = {}, Offset offset = {}, u32 flags = 0, std::optional<u32> defaultSize = std::nullopt);
             void loadFont(const std::string &name, const std::span<const u8> &data, const std::vector<GlyphRange> &glyphRanges = {}, Offset offset = {}, u32 flags = 0, std::optional<u32> defaultSize = std::nullopt);
 
-            constexpr static float DefaultFontSize = 13.0;
+            constexpr float DefaultFontSize = 13.0;
 
             void registerFont(const UnlocalizedString &fontName);
             ImFont* getFont(const UnlocalizedString &fontName);

lib/libimhex/include/hex/api/localization_manager.hpp

@@ -10,7 +10,7 @@
 #include <fmt/core.h>
 #include <wolv/types/static_string.hpp>
 
-namespace hex {
+EXPORT_MODULE namespace hex {
 
     namespace LocalizationManager {
 

lib/libimhex/include/hex/helpers/fs.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <hex.hpp>
 #include <string>
 #include <vector>
 #include <filesystem>
@@ -7,7 +8,7 @@
 
 #include <wolv/io/fs.hpp>
 
-namespace hex::fs {
+EXPORT_MODULE namespace hex::fs {
 
     enum class DialogMode {
         Open,

lib/libimhex/include/hex/helpers/semantic_version.hpp

@@ -6,7 +6,7 @@
 #include <string>
 #include <vector>
 
-namespace hex {
+EXPORT_MODULE namespace hex {
 
     class SemanticVersion {
     public: