Vi and Vim Stack Exchange is a question and answer site for people using the vi and Vim families of text editors. It only takes a minute to sign up.
Sign up to join this community
autocmd FileType cpp nnoremap <buffer> C ct;
autocmd FileType cpp nnoremap <buffer> D dt;
These two are quite useful, but sometimes there is no ; after the cursor and then D doesn't do anything. And then I have to press 3 keys to delete t$. (!)
How to check if the last action (i.e. Dt;) didn't change anything, and in that case, execute something else (Dt$)?
or
How how to check if there's a semicolon after the cursor and do Dt;, otherwise Dt$?
This should do the trick for you:
nnoremap <buffer> <expr> C (getline('.')[getpos('.')[2]:] =~ ';')? "ct;" : "c$"
<expr> allows us to do conditional mappinggetline('.') =~ ';' searches the current line for a semicolongetpos('.')[2] finds the column that the cursor is on and only searches after it
Dinstead ofd$; it's alllmost possible to do withd/;\|$but the end-of-line matching is a bit weird. "Delete to end of line" does exactly that, "delete to (search end of line)" leaves the last character.xto the mapping after the search, it will delete the last character, too. And, in order not to delete the;, if matched, you'll use lookahead. I think you should write this as an answer.