using previously defined names as values in enumerations

[grondilu]

The C programming language allows enumeration constants like this one:

enum { foo, bar = foo };

In Perl 6, that would correspond to:

enum ("foo", bar => foo);

Currently, such code dies like this:

===SORRY!=== Error while compiling -e
Undeclared routine:
    foo used at line 1

I did not see it tested anywhere in S12-enum/, which means either that I failed to find it, that Perl 6 is not meant to behave as C in that regard, or that it was involuntary omitted.

The second case would be LTA imho. I stumbled upon such kind of enum while looking at a header file for the Vulkan 3D graphics API. I don't look at C header files very often so the fact that I've seen this construction suggests that they are not very rare. I believe Perl 6's enumeration constants should behave similarly as their C counterparts, since that would help the translation of C header files for NativeCall bindings.