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I'm trying to fold my c++ code.

Google told me that I should set foldmethod=indent. But this is not what I need.

set foldmethod=indent makes all of folds happen automatically when I enter a c++ file. And zc and zo will fold/unfold all of functions. But what I need is that:

  1. Don't fold automatically when I enter a c++ file;
  2. I only want to fold the function in which the cursor is.

Is it possible to do so?

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  • possible using a custom foldexpression. Aug 24 '20 at 7:27
  • @ChristianBrabandt any doc or link?
    – Yves
    Aug 24 '20 at 7:29
  • The first thing you need to explain is what's wrong with the defaults? I.e. foldmethod=syntax which is set by standard ftplugin?
    – Matt
    Aug 24 '20 at 7:53
  • @Matt I doubt it is set by default. At least in my vim default is manual
    – Maxim Kim
    Aug 24 '20 at 8:15
  • @MaximKim Ah, my bad. fdm=syntax is not set by default. That's my private setting.
    – Matt
    Aug 24 '20 at 8:29
2

If you are ok with set foldmethod=indent and don't need to use other methods (syntax, expr or manual) then add to your vimrc:

set foldlevelstart=99

With this option all your folds would be open for a file you edit(open).

'foldlevelstart' 'fdls' number (default: -1)
            global
            {not available when compiled without the |+folding|
            feature}
    Sets 'foldlevel' when starting to edit another buffer in a window.
    Useful to always start editing with all folds closed (value zero),
    some folds closed (one) or no folds closed (99).

For the second thing I am not sure what exactly you need, I would use zc and zo or za to close/open/toggle current fold.

PS, you might also like set foldmethod=syntax for c/cpp files:

augroup cpp | au!
    au FileType c,cpp setl fdm=syntax
augroup END

enter image description here

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