Vim highlight regex

Question

I have a syntax highlight for cpp to highlight STL algorithms, one line is

syn keywork cppSTL find

My problem is that on a project that I am working, there are a number of classes with a method named find which are getting highlighted, and I want it only highlighted for STL calls.

So I decided to change the previous line to:

syn match cppSTL /[^.>:]\<find\>/ms=s+1
syn match cppSTL /\<std::find\>/ contains=cppScope
syn match cppScope /::/
hi clear cppScope

And it works most of the time. However if fails in this line:

vector<string>::iterator i = find(find(x.begin(), x.end(), val), x.end(), term);
                                  ^^^^

The first find is highlighted correctly, but the second fails. My limited knowledge of vim regex says it should match, but I can't figure out why it doesn't.

Just for kicks, try: i = find(...); i = find(...); ... where they're both on the same line. I'm curious if it's only finding the first match on each line — Brian Vandenberg
– Brian Vandenberg, Commented Apr 24, 2013 at 19:54
@Brian: two calls on the same line works; I think that the problem is because the second find in inside a parentesis - the highlight fails if I surround a call in () like (find(...)) — Akobold
– Akobold, Commented Apr 25, 2013 at 14:29

FDinoff · Accepted Answer · 2013-04-24 19:58:21Z

2

This might be what your looking for. It highlights all words find that are on a line that also contains a :: before it.

syn match cppSTL /\(::.*\)\@<=\<find\>/

If this isn't what you are asking for please tell me.

answered Apr 24, 2013 at 19:58

FDinoff

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2 Comments

Akobold Over a year ago

this doesn't work for me. This would highlight wrongly in util::s->find() and will fail in the double find example of the question if the type of i is declared on another line. But it's getting closer to what I want.

FDinoff Over a year ago

Can you add more examples of cases where find should be highlighted and cases where find should not be highlighted?

Akobold · Accepted Answer · 2013-04-25 19:03:33Z

0

I got it!

The problem is that my regex required a char behind find, and inside the parenthesis, the open parenthesis had already been matched, invalidating my regex.

It works if I replace the first line with:

syn match cppSTL "[^.>:]\@<=\<find\>"

edited Apr 25, 2013 at 19:03

answered Apr 25, 2013 at 14:43

Akobold

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