34. Listening for Attribute Changes

Project/Config/DefaultGame.ini

@@ -9,7 +9,7 @@ Tag_PPV=Global_PPV
 Tag_GlobalPPV=Global_PPV
 Template_PlayerCamera=/Game/Actors/BP_CameraMount.BP_CameraMount_C
 Template_HUD_HostUI=/Game/UI/UI_Host.UI_Host_C
-Template_HostWidgetController=/Game/Core/BP_HostWidgetController.BP_HostWidgetController_C
+Template_HostWidgetController=/Game/UI/BP_HostWidgetController.BP_HostWidgetController_C
 
 [/Script/GameplayAbilities.AbilitySystemGlobals]
 bUseDebugTargetFromHud=true

Project/Source/Gasa/AbilitySystem/GasaAttributeSet.cpp

@@ -8,9 +8,9 @@
 
 UGasaAttributeSet::UGasaAttributeSet()
 {
-	InitHealth( 100.f );
+	InitHealth( 80.f );
 	InitMaxHealth( 100.f );
-	InitMana( 50.f );
+	InitMana( 20.f );
 	InitMaxMana( 50.f );
 }
 
@@ -33,7 +33,6 @@ void UGasaAttributeSet::Client_OnRep_MaxMana( FGameplayAttributeData& PrevMaxMan
 {
 	GAMEPLAYATTRIBUTE_REPNOTIFY( UGasaAttributeSet, MaxMana, PrevMaxMana )
 }
-
 void UGasaAttributeSet::GetLifetimeReplicatedProps( TArray<FLifetimeProperty>& OutLifetimeProps ) const
 {
 	Super::GetLifetimeReplicatedProps( OutLifetimeProps );

Project/Source/Gasa/AbilitySystem/GasaAttributeSet.h

@@ -90,7 +90,6 @@ public:
 	#pragma endregion Setters
 
 #pragma region UObject
-
 	    void
 	    GetLifetimeReplicatedProps( TArray<FLifetimeProperty>& OutLifetimeProps ) const override;
 #pragma endregion UObject

Project/Source/Gasa/Characters/PlayerCharacter.cpp

@@ -28,7 +28,7 @@ void APlayerCharacter::PossessedBy(AController* NewController)
 	AGasaPlayerController* PC   = GetController<AGasaPlayerController>();
 	AGasaHUD*              HUD  = PC->GetHUD<AGasaHUD>();
 	FWidgetControllerData  Data = { PC, PS, AbilitySystem, Attributes };
-	HUD->InitOverlay(& Data);
+	HUD->InitHostWidget(& Data);
 }
 
 // TODO(Ed): We need to setup Net Slime...
@@ -49,6 +49,6 @@ void APlayerCharacter::OnRep_PlayerState()
 		AGasaPlayerController* PC   = GetController<AGasaPlayerController>();
 		AGasaHUD*              HUD  = PC->GetHUD<AGasaHUD>();
 		FWidgetControllerData  Data = { PC, PS, AbilitySystem, Attributes };
-		HUD->InitOverlay(& Data);
+		HUD->InitHostWidget(& Data);
 	}
 }

Project/Source/Gasa/UI/GasaHUD.cpp

@@ -6,14 +6,16 @@
 #include "Blueprint/UserWidget.h"
 using namespace Gasa;
 
-void AGasaHUD::InitOverlay(FWidgetControllerData const* WidgetControllerData)
+void AGasaHUD::InitHostWidget(FWidgetControllerData const* WidgetControllerData)
 {
 	HostWidget = CreateWidget<UHUDHostWidget>( GetWorld() 
 		, GetDevOptions()->Template_HUD_HostUI.LoadSynchronous() );
 
 	HostWidgetController = NewObject<UHostWidgetController>(this, GetDevOptions()->Template_HostWidgetController.Get());
+	HostWidgetController->Data = (* WidgetControllerData);
 	HostWidget->SetWidgetController(HostWidgetController);
-
+	
+	HostWidgetController->BroadcastInitialValues();
 	HostWidget->AddToViewport();
 }
 

Project/Source/Gasa/UI/GasaHUD.h

@@ -19,7 +19,7 @@ public:
 	UPROPERTY(VisibleAnywhere, BlueprintReadWrite)
 	TObjectPtr<UHostWidgetController> HostWidgetController;
 	
-	void InitOverlay(FWidgetControllerData const* WidgetControllerData);
+	void InitHostWidget(FWidgetControllerData const* WidgetControllerData);
 	
 #pragma region HUD	
 	void ShowHUD() override;

Project/Source/Gasa/UI/GlobeProgressBar.cpp

@@ -89,6 +89,11 @@ void UGlobeProgressBar::SetGlassStyle(FSlateBrush brush)
 	Glass->SetBrush(brush);
 }
 
+void UGlobeProgressBar::SetPercentage(float CurrentValue, float MaxValue)
+{
+	Bar->SetPercent( MaxValue > 0.f ? CurrentValue / MaxValue : 0.f );
+}
+
 void UGlobeProgressBar::SetSize(float width, float height)
 {
 	Root_SB->SetWidthOverride(  width );

Project/Source/Gasa/UI/GlobeProgressBar.h

@@ -46,6 +46,9 @@ public:
 	
 	UFUNCTION(BlueprintCallable, Category="Globe")
 	void SetGlassStyle(FSlateBrush brush);
+
+	UFUNCTION(BlueprintCallable, Category="Globe")
+	void SetPercentage(float CurrentValue, float MaxValue);
 	
 	UFUNCTION(BlueprintCallable, Category="Globe")
 	void SetSize(float width, float height);

Project/Source/Gasa/UI/HostWIdgetController.cpp

@@ -1 +1,14 @@
-#include "HostWidgetController.h"
+#include "HostWidgetController.h"
+#include "AbilitySystem/GasaAttributeSet.h"
+void UHostWidgetController::BroadcastInitialValues()
+{
+	Super::BroadcastInitialValues();
+	UGasaAttributeSet* GasaAttribs = Cast<UGasaAttributeSet>( Data.Attributes );
+	if ( GasaAttribs )
+	{
+		Event_OnHealthChanged.Broadcast( GasaAttribs->GetHealth() );
+		Event_OnMaxHealthChanged.Broadcast( GasaAttribs->GetMaxHealth() );
+		Event_OnManaChanged.Broadcast( GasaAttribs->GetMana() );
+		Event_OnMaxManaChanged.Broadcast( GasaAttribs->GetMaxMana() );
+	}
+}

Project/Source/Gasa/UI/HostWidgetController.h

@@ -1,12 +1,31 @@
-#pragma once
+#pragma once
 
 #include "WidgetController.h"
-
 #include "HostWidgetController.generated.h"
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam( FAttributeFloatChangedSig, float, NewValue );
 
-UCLASS()
+UCLASS( Blueprintable, BlueprintType )
 class GASA_API UHostWidgetController : public UWidgetController
 {
 	GENERATED_BODY()
 public:
+#pragma region Attribute Events
+	// Attribute Events are generated by GasaGen/GasaGen_HostWidgetController.cpp
+
+	UPROPERTY( BlueprintAssignable, Category = "Attributes" )
+	FAttributeFloatChangedSig Event_OnHealthChanged;
+
+	UPROPERTY( BlueprintAssignable, Category = "Attributes" )
+	FAttributeFloatChangedSig Event_OnMaxHealthChanged;
+
+	UPROPERTY( BlueprintAssignable, Category = "Attributes" )
+	FAttributeFloatChangedSig Event_OnManaChanged;
+
+	UPROPERTY( BlueprintAssignable, Category = "Attributes" )
+	FAttributeFloatChangedSig Event_OnMaxManaChanged;
+#pragma endregion Attribute Events
+
+#pragma region WidgetController
+	void BroadcastInitialValues() override;
+#pragma endregion WidgetController
 };

Project/Source/Gasa/UI/WidgetController.h

@@ -7,27 +7,19 @@ USTRUCT(BlueprintType)
 struct GASA_API FWidgetControllerData
 {
 	GENERATED_BODY()
-
+public:
 	FWidgetControllerData() = default;
 
-	FWidgetControllerData(AGasaPlayerController*   Controller
+	FWidgetControllerData
-						, AGasaPlayerState*        PlayerState
+	( AGasaPlayerController*   Controller
-						, UAbilitySystemComponent* AbilitySystem
+	, AGasaPlayerState*        PlayerState
-						, UAttributeSet*           Attributes )
+	, UAbilitySystemComponent* AbilitySystem
-#if 1
+	, UAttributeSet*           Attributes )
 	: Controller(Controller)
 	, PlayerState(PlayerState)
 	, AbilitySystem(AbilitySystem)
 	, Attributes(Attributes)
-#endif
+	{}
-	{
-#if 0
-		this->Controller    = Controller;
-		this->PlayerState   = PlayerState;
-		this->AbilitySystem = AbilitySystem;
-		this->Attributes    = Attributes;
-#endif
-	}
 	
 	UPROPERTY(BlueprintReadOnly, Category="Player")
 	TObjectPtr<AGasaPlayerController> Controller;
@@ -50,4 +42,7 @@ public:
 
 	UPROPERTY(BlueprintReadOnly, Category="Player")
 	FWidgetControllerData Data;
+
+	UFUNCTION()
+	virtual void BroadcastInitialValues() {};
 };

Project/Source/GasaGen/GasaGen.cpp

@@ -17,6 +17,197 @@ using namespace gen;
 #include "GasaGen_UGasaAttributeSet.cpp"
 #include "GasaGen_ChangeBPActionMenu.cpp"
 #include "GasaGen_DevOptionsCache.cpp"
+#include "GasaGen_HostWidgetController.cpp"
+
+void gen_UHostWidgetController()
+{
+	Array<StringCached> attribute_fields = get_gasa_attribute_fields();
+
+	CodeBody ori_HostWidgetController_header = parse_file(path_gasa_ui "HostWidgetController.h");
+	{
+		CodeBody header_body = def_body(ECode::Global_Body);
+
+		StrC      str_UHostWidgetController = txt("UHostWidgetController");
+		CodeClass ori_UHostWidgetController = NoCode;
+
+		Code file_code = ori_HostWidgetController_header.begin();
+		for ( ; file_code != ori_HostWidgetController_header.end(); ++ file_code )
+		{
+			if (s32 never_enter = 0; never_enter)
+				found: break;
+
+			switch (file_code->Type)
+			{
+			default:
+				header_body.append(file_code);
+				continue;
+
+			case ECode::Class:
+				if ( ! file_code->Name.starts_with(str_UHostWidgetController))
+					continue;
+				ori_UHostWidgetController = file_code.cast<CodeClass>();
+				++ file_code;
+				goto found;
+
+			case ECode::Preprocess_Include:
+				header_body.append(file_code);
+
+				if ( file_code->Content.starts_with(txt("HostWidgetController.generated.h")))
+				{
+					header_body.append(fmt_newline);
+					header_body.append(fmt_newline);
+				}
+			continue;
+
+			case ECode::Untyped:
+				header_body.append(file_code);
+
+				if (file_code->Content.starts_with( txt("DECLARE_"))
+				||	file_code->Content.starts_with( txt("UCLASS"))
+				)
+					header_body.append(fmt_newline);
+			continue;
+			}
+		}
+
+		CodeBody attribute_events = def_body(ECode::Class_Body);
+		{
+			attribute_events.append( def_comment( txt("Attribute Events are generated by GasaGen/GasaGen_HostWidgetController.cpp")));
+			attribute_events.append(fmt_newline);
+
+			for ( s32 id = 0; id < attribute_fields.num(); )
+			{
+				StringCached attribute_field = attribute_fields[id];
+
+				attribute_events.append( code_str(
+					UPROPERTY(BlueprintAssignable, Category = "Attributes")
+				));
+				attribute_events.append(fmt_newline);
+				attribute_events.append( parse_variable(
+					token_fmt( "field", (StrC) attribute_field, stringize( FAttributeFloatChangedSig Event_On<field>Changed; ))
+				));
+
+				++ id;
+				if ( id < attribute_fields.num() )
+				{
+					attribute_events.append(fmt_newline);
+				}
+			}
+		}
+
+		CodeClass new_UHostWidgetController = ori_UHostWidgetController.duplicate().cast<CodeClass>();
+		CodeBody  new_body                  = def_body(ECode::Class_Body);
+		for (Code	code = ori_UHostWidgetController->Body.begin();
+					code != ori_UHostWidgetController->Body.end();
+					++ code )
+		{
+			switch (code->Type)
+			{
+				default:
+					new_body.append(code);
+					continue;
+
+				case ECode::Preprocess_Pragma:
+				{
+					local_persist bool found = false;
+					if (found)
+					{
+						new_body.append(code);
+						continue;
+					}
+
+					CodePragma pragma = code.cast<CodePragma>();
+					if ( pragma->Content.starts_with(txt("region Attribute Events")) )
+					{
+						new_body.append(pragma);
+						++ code;
+
+						new_body.append(attribute_events);
+
+						while (code->Type != ECode::Preprocess_Pragma
+							|| ! code->Content.starts_with(txt("endregion Attribute Events"))) 
+							++ code;
+
+						new_body.append( code );
+						found = true;
+					}
+				}
+				break;
+
+				case ECode::Untyped:
+					new_body.append(code);
+
+					if (code->Content.starts_with( txt("GENERATED_BODY")))
+						new_body.append(fmt_newline);
+			}
+		}
+		new_body.append(fmt_newline);
+		new_UHostWidgetController->Body = new_body;
+		header_body.append(new_UHostWidgetController);
+
+		for (; file_code != ori_HostWidgetController_header.end(); ++ file_code)
+		{
+			header_body.append(file_code);
+		}
+
+		Builder header = Builder::open(path_gasa_ui "HostWidgetController.h");
+		header.print(header_body);
+		header.write();
+		format_file(path_gasa_ui "HostWidgetController.h");
+	}
+
+	CodeBody ori_HostWidgetController_source = parse_file(path_gasa_ui "HostWidgetController.cpp");
+	{
+		CodeBody source_body = def_body(ECode::Global_Body);
+
+		CodeBody broadcast_calls = def_body(ECode::Function_Body);
+		for (StringCached field : attribute_fields)
+		{
+			broadcast_calls.append( code_fmt( "field", (StrC)field,
+				stringize( Event_On<field>Changed.Broadcast( GasaAttribs->Get<field>() ); )
+			));
+		}
+
+		CodeFn BroadcastInitialValues = parse_function( token_fmt( "broadcast_calls", (StrC)broadcast_calls.to_string(),
+		stringize(
+			void UHostWidgetController::BroadcastInitialValues()
+			{
+				Super::BroadcastInitialValues();
+				// Thiis function is managed by: GasaGen/GasaGen_HostWidgetController.cpp
+
+				UGasaAttributeSet* GasaAttribs = Cast<UGasaAttributeSet>(Data.Attributes);
+				if (GasaAttribs)
+				{
+					<broadcast_calls>
+				}
+			})
+		));
+
+		for ( Code code : ori_HostWidgetController_source)
+		{
+			switch (code->Type)
+			{
+				case ECode::Function:
+					CodeFn function_def = code.cast<CodeFn>();
+
+					if ( String::are_equal(function_def->Name, BroadcastInitialValues->Name)
+					&&	function_def->Params.is_equal(BroadcastInitialValues->Params))
+					{
+						code = BroadcastInitialValues;
+						log_fmt("Swapped: %S", BroadcastInitialValues->Name);
+					}
+				break;
+			}
+
+			source_body.append(code);
+		}
+
+		Builder source = Builder::open(path_gasa_ui "HostWidgetController.cpp");
+		source.print(source_body);
+		source.write();
+		format_file(path_gasa_ui "HostWidgetController.cpp");
+	}
+}
 
 int gen_main()
 {
@@ -38,6 +229,7 @@ int gen_main()
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DELEGATE_RetVal_OneParam));
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DELEGATE_RetVal_ThreeParams));
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DELEGATE_SixParams));
+		PreprocessorDefines.append( get_cached_string(str_DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam));
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FiveParams));
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams));
 		PreprocessorDefines.append( get_cached_string(str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_NineParams));
@@ -77,6 +269,7 @@ int gen_main()
 
 	gen_UGasaAttributeSet();
 	gen_FGasaDevOptionsCache();
+	gen_UHostWidgetController();
 
 	// One offs
 	if (0)

Project/Source/GasaGen/GasaGenCommon.cpp

@@ -13,11 +13,13 @@ using namespace gen;
 #define path_config              path_source      "Config/"
 #define path_module_gasa         path_source      "Gasa/"
 #define path_gasa_ability_system path_module_gasa "AbilitySystem/"
+#define path_gasa_ui             path_module_gasa "UI/"
 
 constexpr StrC str_DECLARE_CLASS                                         = txt("DECLARE_CLASS(");
 constexpr StrC str_DECLARE_DELEGATE_RetVal_OneParam                      = txt("DECLARE_DELEGATE_RetVal_OneParam(");
 constexpr StrC str_DECLARE_DELEGATE_RetVal_ThreeParams                   = txt("DECLARE_DELEGATE_RetVal_ThreeParams(");
 constexpr StrC str_DECLARE_DELEGATE_SixParams                            = txt("DECLARE_DELEGATE_SixParams(");
+constexpr StrC str_DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam           = txt("DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(");
 constexpr StrC str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FiveParams  = txt("DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FiveParams(");
 constexpr StrC str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams  = txt("DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams(");
 constexpr StrC str_DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_NineParams  = txt("DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_NineParams(");

Project/Source/GasaGen/GasaGen_UGasaAttributeSet.cpp

@@ -16,16 +16,26 @@ void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name
 void def_attribute_field_initers                ( CodeBody body, Array<StringCached> properties );
 void impl_attribute_fields                      ( CodeBody body, StrC class_name, Array<StringCached> properties );
 
+Array<StringCached> get_gasa_attribute_fields()
+{
+	local_persist
+	Array<StringCached> attribute_fields = Array<StringCached>::init_reserve(GlobalAllocator, 64);
+
+	for (local_persist s32 do_once = 0; do_once == 0; ++ do_once) {
+		attribute_fields.append( get_cached_string(txt("Health")));
+		attribute_fields.append( get_cached_string(txt("MaxHealth")));
+		attribute_fields.append( get_cached_string(txt("Mana")));
+		attribute_fields.append( get_cached_string(txt("MaxMana")));
+	}
+	return attribute_fields;
+}
+
 void gen_UGasaAttributeSet()
 {
 	CodeType   type_UAttributeSet = def_type( txt("UAttributeSet") );
 	CodeComment generation_notice = def_comment(txt("Generated by GasaGen/GasaGen_UGasaAttributeSet.cpp"));
 
-	Array<StringCached> attribute_fields = Array<StringCached>::init( GlobalAllocator);
+	Array<StringCached> attribute_fields = get_gasa_attribute_fields();
-	attribute_fields.append( get_cached_string(txt("Health")));
-	attribute_fields.append( get_cached_string(txt("MaxHealth")));
-	attribute_fields.append( get_cached_string(txt("Mana")));
-	attribute_fields.append( get_cached_string(txt("MaxMana")));
 
 	StrC class_name = txt("UGasaAttributeSet");
 

Project/Source/GasaGen/gen.cpp

@@ -1950,6 +1950,7 @@ void CodeFn::to_string_def( String& result )
 	if ( ast->Attributes )
 		result.append_fmt( " %S ", ast->Attributes.to_string() );
 
+	b32 prefix_specs = false;
 	if ( ast->Specs )
 	{
 		for ( SpecifierT spec : ast->Specs )
@@ -1958,11 +1959,13 @@ void CodeFn::to_string_def( String& result )
 			{
 				StrC spec_str = ESpecifier::to_str( spec );
 				result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
+
+				prefix_specs = true;
 			}
 		}
 	}
 
-	if ( ast->Attributes || ast->Specs )
+	if ( ast->Attributes || prefix_specs )
 		result.append( "\n" );
 
 	if ( ast->ReturnType )
@@ -2000,19 +2003,22 @@ void CodeFn::to_string_fwd( String& result )
 	if ( ast->Attributes )
 		result.append_fmt( "%S ", ast->Attributes.to_string() );
 
+	bool prefix_specs = false;
 	if ( ast->Specs )
 	{
 		for ( SpecifierT spec : ast->Specs )
 		{
-			if ( ESpecifier::is_trailing( spec ) && ! ( spec != ESpecifier::Pure ) )
+			if ( ! ESpecifier::is_trailing( spec ) || ! ( spec != ESpecifier::Pure ) )
 			{
 				StrC spec_str = ESpecifier::to_str( spec );
 				result.append_fmt( " %.*s", spec_str.Len, spec_str.Ptr );
+
+				prefix_specs = true;
 			}
 		}
 	}
 
-	if ( ast->Attributes || ast->Specs )
+	if ( ast->Attributes || prefix_specs )
 	{
 		result.append( "\n" );
 	}
@@ -2894,17 +2900,17 @@ internal void define_constants()
 
 	access_private       = make_code();
 	access_private->Type = ECode::Access_Private;
-	access_private->Name = get_cached_string( txt( "private:" ) );
+	access_private->Name = get_cached_string( txt( "private:\n" ) );
 	access_private.set_global();
 
 	access_protected       = make_code();
 	access_protected->Type = ECode::Access_Protected;
-	access_protected->Name = get_cached_string( txt( "protected:" ) );
+	access_protected->Name = get_cached_string( txt( "protected:\n" ) );
 	access_protected.set_global();
 
 	access_public       = make_code();
 	access_public->Type = ECode::Access_Public;
-	access_public->Name = get_cached_string( txt( "public:" ) );
+	access_public->Name = get_cached_string( txt( "public:\n" ) );
 	access_public.set_global();
 
 	attrib_api_export = def_attributes( code( GEN_API_Export_Code ) );

Project/Source/GasaGen/gen.hpp

@@ -5146,6 +5146,9 @@ Code CodeParam::duplicate()
 
 bool CodeParam::is_equal( Code other )
 {
+	if ( ast == nullptr && other.ast == nullptr)
+		return true;
+
 	if ( ast == nullptr || other.ast == nullptr )
 	{
 		log_failure( "Code::is_equal: Cannot compare code, AST is null!" );

scripts/.clang-format

@@ -166,7 +166,16 @@ SpacesInSquareBrackets: false
 
 Standard: c++20
 
-StatementMacros: ['UPROPERTY', 'UFUNCTION', 'UCLASS', 'USTRUCT', 'UENUM', 'UINTERFACE', 'GENERATED_BODY']
+StatementMacros: [
+  'UPROPERTY',
+  'UFUNCTION',
+  'UCLASS',
+  'USTRUCT',
+  'UENUM',
+  'UINTERFACE',
+  'GENERATED_BODY',
+  'DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam'
+]
 
 TabWidth: 4
 

scripts/gen_pass_gasa.ps1

@@ -79,6 +79,7 @@ function build-gengasa
 
 	$compiler_args = @()
 	$compiler_args += ($flag_define + 'GEN_TIME')
+	$compiler_args += ($flag_cpp_version + 'c++17')
 
 	$linker_args = @()
 	$linker_args += $flag_link_win_subsystem_console

scripts/helpers/vendor_toolchain.ps1

@@ -94,6 +94,7 @@ if ( $vendor -match "clang" )
 	# https://clang.llvm.org/docs/ClangCommandLineReference.html
 	$flag_all_c 					   = '-x c'
 	$flag_all_cpp                      = '-x c++'
+	$flag_cpp_version                  = '-std='
 	$flag_compile                      = '-c'
 	$flag_color_diagnostics            = '-fcolor-diagnostics'
 	$flag_no_color_diagnostics         = '-fno-color-diagnostics'
@@ -318,6 +319,7 @@ if ( $vendor -match "msvc" )
 	# https://learn.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-by-category?view=msvc-170
 	$flag_all_c 					 = '/TC'
 	$flag_all_cpp                    = '/TP'
+	$flag_cpp_version                = '/std:'
 	$flag_compile			         = '/c'
 	$flag_debug                      = '/Zi'
 	$flag_define		             = '/D'