make static varaibles const via lamdbas

this pr also makes `sfSoundRecorder_getAvailableDevices` return a const pointer to a const char pointer so you can no longer modify where the pointers of the strings are pointing into becuase it doesn't make sense.

include/CSFML/Audio/SoundRecorder.h

@@ -129,7 +129,7 @@ CSFML_AUDIO_API bool sfSoundRecorder_isAvailable(void);
 /// \return An array of strings containing the names
 ///
 ////////////////////////////////////////////////////////////
-CSFML_AUDIO_API const char** sfSoundRecorder_getAvailableDevices(size_t* count);
+CSFML_AUDIO_API const char* const* sfSoundRecorder_getAvailableDevices(size_t* count);
 
 ////////////////////////////////////////////////////////////
 /// \brief Get the name of the default audio capture device

src/CSFML/Audio/SoundRecorder.cpp

@@ -81,18 +81,17 @@ bool sfSoundRecorder_isAvailable()
 
 
 ////////////////////////////////////////////////////////////
-const char** sfSoundRecorder_getAvailableDevices(size_t* count)
+const char* const* sfSoundRecorder_getAvailableDevices(size_t* count)
 {
-    static std::vector<std::string> stringDevices = sf::SoundRecorder::getAvailableDevices();
-    static std::vector<const char*> cstringDevices;
-
-    if (cstringDevices.empty() && !stringDevices.empty())
+    static const auto cstringDevices = []
     {
+        static const std::vector<std::string> stringDevices = sf::SoundRecorder::getAvailableDevices();
+        std::vector<const char*>              devices;
+        devices.reserve(stringDevices.size());
         for (const auto& stringDevice : stringDevices)
-        {
-            cstringDevices.push_back(stringDevice.c_str());
-        }
-    }
+            devices.push_back(stringDevice.c_str());
+        return devices;
+    }();
 
     if (count)
         *count = cstringDevices.size();
@@ -104,7 +103,7 @@ const char** sfSoundRecorder_getAvailableDevices(size_t* count)
 ////////////////////////////////////////////////////////////
 const char* sfSoundRecorder_getDefaultDevice()
 {
-    static std::string defaultDevice = sf::SoundRecorder::getDefaultDevice();
+    static const std::string defaultDevice = sf::SoundRecorder::getDefaultDevice();
 
     return !defaultDevice.empty() ? defaultDevice.c_str() : nullptr;
 }

src/CSFML/Window/VideoMode.cpp

@@ -41,14 +41,13 @@ sfVideoMode sfVideoMode_getDesktopMode()
 ////////////////////////////////////////////////////////////
 const sfVideoMode* sfVideoMode_getFullscreenModes(size_t* count)
 {
-    static std::vector<sfVideoMode> modes;
-
-    // Populate the array on first call
-    if (modes.empty())
+    static const auto modes = []
     {
+        std::vector<sfVideoMode> videomodes;
         for (const auto& mode : sf::VideoMode::getFullscreenModes())
-            modes.push_back(convertVideoMode(mode));
-    }
+            videomodes.push_back(convertVideoMode(mode));
+        return videomodes;
+    }();
 
     if (count)
         *count = modes.size();

src/CSFML/Window/Vulkan.cpp

@@ -52,7 +52,7 @@ sfVulkanFunctionPointer sfVulkan_getFunction(const char* name)
 ////////////////////////////////////////////////////////////
 const char* const* sfVulkan_getGraphicsRequiredInstanceExtensions(size_t* count)
 {
-    static std::vector<const char*> extensions = sf::Vulkan::getGraphicsRequiredInstanceExtensions();
+    static const std::vector<const char*> extensions = sf::Vulkan::getGraphicsRequiredInstanceExtensions();
 
     if (count)
         *count = extensions.size();