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

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

[ebuild   R    ] dev-lang/swig-4.3.1::gentoo  USE="pcre -ccache -doc -test" 8419 KiB

Total: 1 package (1 reinstall), Size of downloads: 8419 KiB