Struct destructors are always deterministic: https://dlang.org/spec/struct.html#struct-destructor https://dlang.org/spec/struct.html#struct-destructor Class de

Struct destructors are always deterministic: https://dlang.org/spec/struct.html#struct-destructor https://dlang.org/spec/struct.html#struct-destructor Class destructors can be declared deterministic with the "scope" keyword: https://dlang.org/spec/attribute.html#scope https://dlang.org/spec/attribute.html#scope Scope guards are useful if you cannot change the data type itself.