Use the word under the cursor with Ctrl-R Ctrl-A

Everybody at Hashrocket has some solution for searching for the word under the cursor.

Some people created a mapping, but as I try to keep to native vim functionality as much as possible I copied the current word with yiw and then typed:

:Rg <C-R>0

Where <C-R>0 writes whatever is in register 0 to the command.

Instead, the command mapping <C-R><C-A> writes the word currently under the cursor to the command, so I can just skip the yiw.

:Rg <C-R><C-A>

Will search for the word under the cursor.

See :help c_CTRL-R_CTRL-A for more info.