These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/MRO-Compat-0.150.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 17 KiB
[ebuild  N     ] dev-perl/Algorithm-C3-0.110.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 19 KiB
[ebuild  N     ] dev-perl/Class-C3-0.350.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 34 KiB
[ebuild  N     ] dev-perl/Class-C3-Componentised-1.1.2::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 10 KiB

Total: 4 packages (4 new), Size of downloads: 79 KiB