Question

I would like to set up vim so that it moves my cursor right if I press tab on a closing parentheses. This is useful when used with auto complete parentheses.

Here is what I have so far (does not work):

inoremap <expr> <Tab> strpart(getline('.'), col('.')-1, 1) == "}" ? "\<Right>" : "\<Tab>"
inoremap <expr> <Tab> strpart(getline('.'), col('.')-1, 1) == ")" ? "\<Right>" : "\<Tab>"
inoremap <expr> <Tab> strpart(getline('.'), col('.')-1, 1) == "]" ? "\<Right>" : "\<Tab>"

What am I doing wrong?

Answer 1

There can be only one working mapping to one key (you can define at least two: buffer-local (one per buffer) and one global, but they do not work at the same time), so you need something like that:

inoremap <expr> <Tab> stridx('])}', getline('.')[col('.')-1])==-1 ? "\t" : "\<Right>"

Don’t use strpart(), string[idx1:idx2] works fine (all of idx1, idx2, : are optional, but at least one must be present), is less to type and is more readable.