各式各样的宏(macro)、模板

 Macros

• STRUCT_OFFSET(Type, Member)
• UE_ARRAY_COUNT(array)

 Templates

• TLazySingleton
• TGuardValue
• TFixedAllocator
• TRefCountPtr

TScopeGuard

Not meant for direct consumption : use ON_SCOPE_EXIT instead. RAII class that calls a lambda when it is destroyed. Usage: ON_SCOPE_EXIT{ // statements };

• TValueOrError<ValueType, FString>
  • TValueOrError<UObject*, FString> LoadAssetFromData(const FAssetData& AssetData);
  • MakeError()
  • MakeValue()

• TOptional<Type>
  • When IsSet() returns true, the GetValue() is meaningful.
  • Otherwise GetValue() is meaningless.