EngineVersionComparison.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Runtime/Launch/Resources/Version.h"
 
// Helper for UE_VERSION_NEWER_THAN and UE_VERSION_OLDER_THAN
#define UE_GREATER_SORT(Value, ValueToBeGreaterThan, TieBreaker)
    (((Value) > (ValueToBeGreaterThan)) || (((Value) == (ValueToBeGreaterThan)) && (TieBreaker)))
 
// Version comparison macro that is defined to true if the UE version is newer than MajorVer.MinorVer.PatchVer and false otherwise
// (a typical use is to alert integrators to revisit this code when upgrading to a new engine version)
#define UE_VERSION_NEWER_THAN(MajorVersion, MinorVersion, PatchVersion)
    UE_GREATER_SORT(ENGINE_MAJOR_VERSION, MajorVersion, UE_GREATER_SORT(ENGINE_MINOR_VERSION, MinorVersion, UE_GREATER_SORT(ENGINE_PATCH_VERSION, PatchVersion, false)))
 
// Version comparison macro that is defined to true if the UE version is older than MajorVer.MinorVer.PatchVer and false otherwise
// (use when making code that needs to be compatible with older engine versions)
#define UE_VERSION_OLDER_THAN(MajorVersion, MinorVersion, PatchVersion)
    UE_GREATER_SORT(MajorVersion, ENGINE_MAJOR_VERSION, UE_GREATER_SORT(MinorVersion, ENGINE_MINOR_VERSION, UE_GREATER_SORT(PatchVersion, ENGINE_PATCH_VERSION, false)))