Looks like we need C++14 for this

Build/CMakeLists.txt

@@ -269,7 +269,7 @@ foreach(library ${LIBRARIES})
 		target_compile_options(${NAME} PUBLIC "/MP")
 	endif(MSVC)
 	
-	set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 11)
+	set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 14)
 	set_property(TARGET ${NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
     
     install(TARGETS ${NAME}
@@ -368,7 +368,7 @@ if(BUILD_PYTHON_BINDINGS)
 
         set_target_properties(${NAME} PROPERTIES PREFIX "")
 
-        set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 11)
+        set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 14)
         set_property(TARGET ${NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
 
         install(TARGETS ${NAME}
@@ -396,7 +396,7 @@ if(BUILD_LUA_BINDINGS)
                            SOVERSION ${LIBROCKET_VERSION_MAJOR}
         )
 
-        set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 11)
+        set_property(TARGET ${NAME} PROPERTY CXX_STANDARD 14)
         set_property(TARGET ${NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
 
         install(TARGETS ${NAME}
@@ -587,14 +587,14 @@ endif(NOT BUILD_FRAMEWORK)
 
     # Build and install sample shell library
     add_library(shell STATIC ${shell_SRC_FILES} ${shell_HDR_FILES})
-	set_property(TARGET shell PROPERTY CXX_STANDARD 11)
+	set_property(TARGET shell PROPERTY CXX_STANDARD 14)
 	set_property(TARGET shell PROPERTY CXX_STANDARD_REQUIRED ON)
 
     # Build and install the basic samples
     foreach(sample ${samples})
         bl_sample(${sample} ${sample_LIBRARIES})
 		
-		set_property(TARGET ${sample} PROPERTY CXX_STANDARD 11)
+		set_property(TARGET ${sample} PROPERTY CXX_STANDARD 14)
 		set_property(TARGET ${sample} PROPERTY CXX_STANDARD_REQUIRED ON)
 
         # The samples always set this as their current working directory
@@ -641,7 +641,7 @@ endif(NOT BUILD_FRAMEWORK)
 			include_directories(${SDL2_INCLUDE_DIR} ${GLEW_INCLUDE_DIR})
 
 			bl_sample(sdl2 ${sample_LIBRARIES}  ${SDL2_LIBRARY} ${SDL2_IMAGE_LIBRARY} ${GLEW_LIBRARY})
-			set_property(TARGET sdl2 PROPERTY CXX_STANDARD 11)
+			set_property(TARGET sdl2 PROPERTY CXX_STANDARD 14)
 			set_property(TARGET sdl2 PROPERTY CXX_STANDARD_REQUIRED ON)
 		
 			# The samples always set this as their current working directory
@@ -700,7 +700,7 @@ endif(NOT BUILD_FRAMEWORK)
 			bl_sample(sfml2 ${sample_LIBRARIES} ${SFML_LIBRARIES})
 		endif()
 		
-			set_property(TARGET sfml2 PROPERTY CXX_STANDARD 11)
+			set_property(TARGET sfml2 PROPERTY CXX_STANDARD 14)
 			set_property(TARGET sfml2 PROPERTY CXX_STANDARD_REQUIRED ON)
 			
 			# The samples always set this as their current working directory
@@ -713,11 +713,8 @@ endif(NOT BUILD_FRAMEWORK)
     # Build and install the tutorials
     foreach(tutorial ${tutorials})
         bl_sample(${tutorial} ${sample_LIBRARIES})
-		
-		set_property(TARGET ${tutorial} PROPERTY CXX_STANDARD 17)
-		set_property(TARGET ${tutorial} PROPERTY CXX_STANDARD_REQUIRED ON)
 
-		set_property(TARGET ${tutorial} PROPERTY CXX_STANDARD 11)
+		set_property(TARGET ${tutorial} PROPERTY CXX_STANDARD 14)
 		set_property(TARGET ${tutorial} PROPERTY CXX_STANDARD_REQUIRED ON)
 		
         # The tutorials always set this as their current working directory
@@ -729,7 +726,7 @@ endif(NOT BUILD_FRAMEWORK)
 
     # Build and install invaders sample
     bl_sample(invaders ${sample_LIBRARIES})
-	set_property(TARGET invaders PROPERTY CXX_STANDARD 11)
+	set_property(TARGET invaders PROPERTY CXX_STANDARD 14)
 	set_property(TARGET invaders PROPERTY CXX_STANDARD_REQUIRED ON)
     install(DIRECTORY DESTINATION ${SAMPLES_DIR}/invaders)
     install(TARGETS invaders 
@@ -739,7 +736,7 @@ endif(NOT BUILD_FRAMEWORK)
 	if(BUILD_PYTHON_BINDINGS)
 	    # Build and install pyinvaders sample
 	    bl_sample(pyinvaders ${sample_LIBRARIES} ${PYTHON_LIBRARIES} ${PY_BINDINGS_LINK_LIBS})
-		set_property(TARGET pyinvaders PROPERTY CXX_STANDARD 11)
+		set_property(TARGET pyinvaders PROPERTY CXX_STANDARD 14)
 		set_property(TARGET pyinvaders PROPERTY CXX_STANDARD_REQUIRED ON)
 	    install(DIRECTORY DESTINATION ${SAMPLES_DIR}/pyinvaders)
 	    install(TARGETS pyinvaders
@@ -749,7 +746,7 @@ endif(NOT BUILD_FRAMEWORK)
     
     if(BUILD_LUA_BINDINGS)
         bl_sample(luainvaders RocketCoreLua RocketControlsLua ${sample_LIBRARIES} ${LUA_BINDINGS_LINK_LIBS})
-		set_property(TARGET luainvaders PROPERTY CXX_STANDARD 11)
+		set_property(TARGET luainvaders PROPERTY CXX_STANDARD 14)
 		set_property(TARGET luainvaders PROPERTY CXX_STANDARD_REQUIRED ON)
         install(DIRECTORY DESTINATION ${SAMPLES_DIR}/luainvaders)
         install(TARGETS luainvaders 

Include/Rocket/Core/Platform.h

@@ -48,7 +48,7 @@
 	#define ROCKET_DEBUG
 #endif
 
-#if defined __LP64__ || defined _M_X64 || defined __MINGW64__ || defined _LP64
+#if defined __LP64__ || defined _M_X64 || defined _WIN64 || defined __MINGW64__ || defined _LP64
     #define ROCKET_ARCH_64
 #else
     #define ROCKET_ARCH_32