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

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

[ebuild  N     ] dev-libs/libdatrie-0.2.14-r1:0/1::gentoo  USE="-doc" 319 KiB
[ebuild  N     ] dev-libs/libthai-0.1.30-r1::gentoo  USE="-doc" 426 KiB

Total: 2 packages (2 new), Size of downloads: 744 KiB