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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-cpp/rapidyaml-0.12.1:0/0.12.1::gentoo  10148 KiB

Total: 1 package (1 new), Size of downloads: 10148 KiB