In LibreOffice C++ code, there are many cases when you want to use some string literals or even numerical values as some data that you need to use in C++ code. Traditionally, in the code inherited from the old C days, these were defined as symbolic constants using #define and char* or other literals.

Using modern C++ in LibreOffice, one may use o3tl::enumarray to create such arrays of values.

Example
Using #define, you may have seen definitions like this:

const char[] FRAME_PROPNAME_ASCII_DISPATCHRECORDERSUPPLIER = "DispatchRecorderSupplier";
const char[] FRAME_PROPNAME_ASCII_ISHIDDEN = "IsHidden";
inline constexpr OUString FRAME_PROPNAME_ASCII_LAYOUTMANAGER = "LayoutManager";

And also, the relevant states:
#define FRAME_PROPHANDLE_DISPATCHRECORDERSUPPLIER 0
#define FRAME_PROPHANDLE_ISHIDDEN 1

You may turn that into:

enum class FramePropNameASCII
{
    DispatcherRecorderSupplier,
    IsHidden,
    LAST=IsHidden
}

Don't forget to add LAST. It is required.

And then:
constexpr o3tl::enumarray<FramePropNameASCII, OUString> FramePropName = {
    u"DispatchRecorderSupplier"_ustr,
    u"IsHidden"_ustr
};

The names will be more readable this way. The usage is quite easy. For example, one can use [] to access the relevant string literal.