On 29-Mar-2013 Cody Cutler <[email protected]> wrote:
> Hello list.  The attached patch allows optional regexs to be passed to
> :tj and friends.  these regexs is then used to further refine available
> tags before they are printed.
> 
> This patch is useful when you have many tags for a single identifier.
> For example, suppose a large C++ project has initialize() methods for
> 100s of classes.  Going through the list of tags printed by :tj is
> tedious.  Most of the time I know additional information about the
> identifier I am looking for like the containing object type or source
> filename.  The text after the '/' in the argument is used as a regex
> (unless a '/' is the first character of the tag identifier, then the
> text after the second '/' is used) to match against the "other" tag
> fields (which often contains the containing type name).  If a '!' is
> present, text after it is used to match against filenames.  With this
> patch you can type:
> 
> :tj initialize/SomeClass
> 
> to list all tags that also contain "SomeClass" in their "other" fields
> or
> 
> :ts initialize/!arch/amd64
> 
> to list all tags matching initialize that contain "arch/amd64" in the
> containing file's pathname.  Or a mix:
> 
> :ts initialize/SomeClass!arch/amd64
> 
> The '/' and '!' characters were chosen somewhat arbitrarily--I'm not
> sure if they are a safe choice.
> 
> Any comments are appreciated.

I've been thinking about your proposed patch and I would have one 
problem with it: it doesn't seem intuitive and although I do work with 
software projects with quite large amounts of source code, I don't think 
I would use it much (because I wouldn't be able to remember all the 
quirks of the command).

However, I think that there is a very simple solution to your problem 
which does not require changing the behaviour of Vim itself: create 
a command in VimL which will do everything you need. For this command 
I would use the following:
- input() – for getting the name of the tag to jump to,
- taglist() – to get a list of tags matching what the user chose to 
  view,
- input() – to get the name of the class,
- input() – to get the file name pattern,
- match() – to filter the tag list returned by taglist() with the 
  criteria based on the values input by the user,
- setqflist(), setloclist() – to create a list displayed in the quickfix 
  window (:copen, :lopen),
- inputlist() – perhaps instead of using setqflist() to make the 
  experience akin to using :tselect.

I believe that using such a command should be much more pleasant than 
poring through hundreds of lines of output generated by grep. And it has 
the potential of being more user-friendly – whenever you use input(), 
you can help the user by providing a hint in the prompt.

What do you think? I'll be happy to hear from you.

-- 
Cheers,
Lech

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