Mikolaj Machowski wrote:
On pon sty 1 2007, Mikolaj Machowski wrote:
This won't work: you need a different variable name, see ":help E706".

Yeah, I forgot (not only about that).

This is complete solution::

    function! UpdateTags()
            call writefile(getline(1, '$'), '.tmp.cc', 'b')
let tags = system('ctags --c++-kinds=+p --fields=+iaS --extra=+q -f - .tmp.cc')
            " Note: whitespaces around expand are tab chars.
            let alltags = system('grep -v "        '.expand('%').' " tags')
            let tagstable = split(alltags, '\n')
            call add(tagstable, tags)
            call writefile(tagstable, 'tags', 'b')
            redraw!
            return ';'
    endfunction
    inoremap <expr> ; UpdateTags()

Note: this is untested in real life, it doesn't return any errors.

In good conditions execution of whole function takes 0.46s on big tags
file (KMail source, tags size over 4MB, 10000 lines). Delay noticeable
on my computer Sempron 2200, 512M RAM, old HD 5400rpm. In worse conditions
it was taking up to 0.75s::

    FUNCTION  UpdateTags()
    Called 1 time
    Total time:   0.527128
     Self time:   0.401542

    count  total (s)   self (s)
        1              0.000551         call writefile(getline(1, '$'), 
'.tmp.cc', 'b')
1 0.026373 0.000298 let tags = system('ctags --c++-kinds=+p --fields=+iaS --extra=+q -f - .tmp.cc')
        1              0.000091         let stags = split(tags, '\n')
1 0.130731 0.031220 let alltags = system('grep -v " '.expand('%').' " tags')
        1              0.128909         let tagstable = split(alltags, '\n')
        1              0.000043         call extend(tagstable, stags)
        1              0.240341         call writefile(tagstable, 'tags', 'b')
        1              0.000033         return ';'

    FUNCTIONS SORTED ON TOTAL TIME
    count  total (s)   self (s)  function
        1   0.527128   0.401542  UpdateTags()

    FUNCTIONS SORTED ON SELF TIME
    count  total (s)   self (s)  function
        1   0.527128   0.401542  UpdateTags()

Note however I've made one fatal mistake. ``ctags fname`` will point to
tags in file .tmp.cc not our real current file! Filtering tags in Vim is
possible and on small sample quite fast but still 0.5s is long. Maybe we
should put that strain to the system::

    function! UpdateTags()
            call writefile(getline(1, '$'), '.tmp.cc', 'b')
call system('grep -v " '.expand('%').' " tags > tags2 && mv -f tags2 tags') let tags = system('ctags --c++-kinds=+p --fields=+iaS --extra=+q -f - .tmp.cc | sed "s/\t\.tmp\.cc\t/\t'.expand('%').'\t/" >> tags')
            return ';'
    endfunction
    inoremap <expr> ; UpdateTags()

And here we have the winner::

    FUNCTION  UpdateTags()
    Called 1 time
    Total time:   0.145700
     Self time:   0.001068

    count  total (s)   self (s)
        1              0.000523         call writefile(getline(1, '$'), 
'.tmp.cc', 'b')
1 0.096118 0.000195 call system('grep -v " '.expand('%').' " tags > tags2 && mv -f tags2 tags') 1 0.049003 0.000294 call system('ctags --c++-kinds=+p --fields=+iaS --extra=+q -f - .tmp.cc | sed "s/\t\.tmp\.cc\t/\t'.expand('%').'\t/" >> tags')
        1              0.000029         return ';'

    FUNCTIONS SORTED ON TOTAL TIME
    count  total (s)   self (s)  function
        1   0.145700   0.001068  UpdateTags()

    FUNCTIONS SORTED ON SELF TIME
    count  total (s)   self (s)  function
        1   0.145700   0.001068  UpdateTags()


Below 0.15s (and even in worse conditions only up to 0.25s)! This is
less then one keystroke of good touchtyper. This is for the price of
portability but you can find grep/sed/mv for other systems so situation
isn't hopeless.

HTH

m.


Thank you for your script. It doesn't work so fast in my computer.
There is another problem when I use omnicppcomplete plugin.
I don't know if it is its bug.
For example, there are two files:
--------tmp1.h--------------------
class tmp1{
public:
  void print1(){}
};
--------hello.cc-----------------
#include "tmp1.h"

class hello{
public:
  void print(){}
  static void hello(){}
  static int h;
};

int main(){
  hello h;
  hello::hello();
  h.
  hello::<C-x><C-o>    <--------- the popup menu only appear here
  tmp1 t1;
  t1.
}

I'm sure tags has been created correctly. The popup menu sometimes appears, sometimes doesn't when I type '.' or '->'. I tried many times, but still didn't find the rule: when it appears, when it doesn't.
Does anyone meet the similar program? Or has some ideas?

Zheng Da

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