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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. – TessellatingHeckler Jul 9 '16 at 17:24xto 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. – Al.G. Jul 9 '16 at 18:02