When a TSoftObjectPtr pointing to a const type is used as a parameter for a Dyanmic delegate, unreal marks it as deprecaded.

A change has been done to the TSoftObjectPtr class that warns when constructing a pointer-to non-const from a pointer-to-const. This change makes sense and is correct.

Example:

UTexture2D* LoadedTexture = LoadObject<UTexture2D>(nullptr, TEXT("/Game/Textures/MyTexture.MyTexture"));

TSoftObjectPtr<const UTexture2D> ConstTexturePtr = LoadedTexture;

// Warning occurs here
TSoftObjectPtr<UTexture2D> NonConstTexturePtr = ConstTexturePtr;

The issue comes when a TSoftObjectPtr<const type> is used inside a DynamicDelegate. The delegate would strip the const from the declaration.

This warning was done in 5.5, so it is a regression.

1- Create a C++ Unreal 5.5 project
2- Create any Unreal class, Object/Actor for example, and create a Dynamic delegate with a TSoftObjectPtr pointing to a const type as a parameter. Example:

DECLARE_DYNAMIC_DELEGATE_OneParam(FExampleDelegate, TSoftObjectPtr<const UObject>, Object);

3- Create a variable inside the class of the dynamic delegate type and compile. The following warning will appear:

Warning C4996 : 'TSoftObjectPtr<UObject>::TSoftObjectPtr': Constructing TSoftObjectPtr from an incompatible pointer type has been deprecated. Please update your code to the new API before upgrading to the next release, otherwise your project will no longer compile.

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