dawgfoto/druntime — comment on commit 1af5e533148a2fbf3b9d8b4df262aea54183ae55
File: src/gc/gcx.d line 3077
By schveiguy:

Why not use the enum here instead of 0/1/2?

There are many cases in GC where enums are repeated because they are not in a common place, I see no reason to break from that technique.