Can gtags navigate back?

Question

I use vim with gtags plug in to read code through multiple files. Everything is okay except that I donnot know how to navigate back to the previous position before I run :CtagsCursor to jump to the token definition. I read through the GNU global online docs, but find nothing useful. But in the chapter "3.4 Elvis using GLOBAL", it says "CTRL-T return to the most recent tag context.", which is exactly what I wants. No idea why the function is not implemented for vim, or something is wrong with me?

BR, Ruochen

Answer 1

<C-t> is a built-in command related to Vim's "tag stack".

It looks like the plugin you are using doesn't implement a similar feature (and doesn't interact with the tag stack anyway) so you are left with <C-o>/<C-i> to jump around the jump list.

Answer 2

I've looked through the docs and it seems tag stack isn't supported with gnu-global in vim according to section 3.5.1. Features: http://www.gnu.org/software/global/globaldoc_toc.html#Features_0028Vim_0029

In the above description, there is a link to setting up the plugin which uses tag stack, so check that out.

Other than that using ctrl-o and ctrl-i as substitutes should work fine.

Answer 3

I solved the problem by using gtags-cscope as cscopeprog. Additionally I activated cscopetag to use cscope for ctag lookup in vim, too. This way, if you press <C-]> you search for the declaration in gtags and <C-t> to go back again.

For lookups of references, which I mapped to <C-\>, I use the quickfix window. This does not use the tag stack and <C-t> will not work.

I tried it, using the tag stack, but this leads to a cluttered tag stack and a large selection window. If you lookup multiple references you have to press <C-t> multiple time, that's why I decided using the quickfix approach instead.

Here is my actual config.

set cscopeprg=gtags-cscope
if has('cscope')
  set cscopetag cscopeverbose
  if has('quickfix')
    set cscopequickfix=s-,c-,d-,i-,t-,e-
  endif

  map <C-\> :cs find c <C-R>=expand("<cword>")<CR><CR>
endif

If you like to give the reference lookup without quickfix a try, remove the c- option in cscopequickfix.

Another hint, cscopeverbose is a option to print error messages when using cscope. Otherwise you won't get errors (e.g. no gtags file added, or symbol not found).

EDIT 1:

To load a GTAGS file, use the built-in command cs add ./GTAGS.

Answer 4

GNU GLOBAL has two handy vim plugins gtags.vim and gtags-cscope.vim.

The heading comment of gtags-cscope.vim says that it is used to integrate GLOBAL with Vim's cscope interface.

So what you have to do is:

1. Install the vim plugins (They are in the tarball)
   • cp /path/to/global-source/*.vim ~/plugin/
2. Add some options in ~/.vimrc

The heading comment of gtags-cscope.vim has all the available options. In my case, I use the following:

" To use the default key/mouse mapping:
let GtagsCscope_Auto_Map = 1
" If you hope auto loading:
let GtagsCscope_Auto_Load = 1
" Don't show warning if GTAGS not found
let GtagsCscope_Quiet = 1
" To use 'vim -t ', ':tag' and '<C-]>'
set cscopetag