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So you're in Normal mode, then you press f followed by a character, then vim takes you to the next occurrence of that character. When you land on that character you are in Normal mode.
My question is how can we make it so that when you land it automatically switches you to Insert mode ? at the character landed itself, i.e with i.
An idea:
nnoremap <expr> f FindInsert('f', 'i')
function FindInsert(find, insert) abort
const l:char = getchar()->nr2char()
return printf('%s%s%s', a:find, l:char, a:insert)
endfunction
It would then be easy to add F/t/T, or to use a instead of i, or what have you.
But be aware that when you press ; or ,, you won't get this behavior.
Also, I haven't handled counts.
Error detected while processing function FindInsert: line 1: E15: Invalid expression: >nr2char()
-> syntax requires a fairly recent Vim version... The equivalent statement without using it is let l:char = nr2char(getchar()) (const is also a recent addition.)
fandtas part of other Normal mode sequences and commands. Also, for example, commands such asdt)orct)to delete or change until the next). All that just to save a singleiorakey press? Not to mention by bundling these two together you also lose the ability to pick betweenianda...