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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] media-libs/zxing-cpp-2.3.0-r1:0/3::gentoo  USE="-experimental -test -tools" 985 KiB

Total: 1 package (1 new), Size of downloads: 985 KiB