Ignore pattern inside of a region

Question

:h region bring me very little help. I need to exclude a pattern inside a region that should be ignored for example: don't apply match/highlight begin from # to the end of line $
I try to ignore #.*$ inside a region but seem I can't find anything related from help. Did I miss something from docs?
Or if I need to write a function to do that, do you have any suggestions?

Answer 1

Create a testing file with the following contents:

# foobar

{
    # foo
}

[
    # bar
]

First solution

:syn Comment /#.*$/
:syn myRegionWithoutComment start='{' end='}'
:syn myRegionWithComment start='[' end=']' contains=ALL

Second solution

Try :h syn-skip.

skip={skip_pattern} The search pattern that defines text inside the region where not to look for the end.

See Learn Vimscript the Hard Way, Even More Advanced Syntax Highlighting for an example.