some additional thoughts on NEARNESS SORT option

Hi Shigio:

I am not sure I updated you that I was able to down load from repo, do 
the build and test things out a bit. Worked very well. ( I am now 
waiting for Leo Liu of ggtags-mode in emacs to incorporate this feature 
in ggtags.el, which he has agreed to do as be also believes that 
"nearness" sort is a good feature to exploit.

I had one more thought on this.

1) the highest priority is to find definitions in current directory or 
below this directory. But it seems we can do a little better. How about:

a) highest prio is if the definition appears in the same file as where 
M-. is being done.
b) 2nd highest would be other entries from other files at this directory 
level.
c) 3rd highest would be any entries in subdirectory/subdirectories(?)
d) start to move up on directory at a time as per rules prev. given for 
-N option.

2) And here is yet another "wild" idea. suppose you are looking for 
definition of method "foo()". THe "which-func-mode" can tell you that 
you are sitting in Class A::method bar(). In this case it seems that 
first choice would be if there is a Class A::method foo() since that is 
one most likely is being sought. However, this gets into having to deal 
w/ which-func-mode to learn more about where the point is.  I think 1a) 
above may get us this indirectly.

Take care and have a good weekend. If possible let me know when a new 
release (v6.5?) will have this in it.

Gautam