This generated name is created by the ctags CXX parser [here](https://github.com/geany/geany/blob/512e88df8d97284c191459450bce4dd7877b9c2b...).
The value of `parser -> anonymousIdentiferId` is incremented a few lines above, so I suspect its intended to count anon structs and give them incrementing names, but probably it isn't being properly initialised to zero at startup. @techee?