How to fold C++-style comments in Vim?

Question

Syntax folding in Vim makes it easy to create folds for regions, the start and end of which can be defined with regular expressions:

syn region myRegion start="#region" end="#endregion" transparent keepend extend fold

However, I am not sure how I can use syntax folding to define folds for C++-style comments, which are sets of lines beginning with "//".

Answer 1

I think I found a solution:

:syn match comment "\v(^\s*//.*\n)+" fold

This is a multiline match that folds consecutive lines beginning with whitespace and double slashes. The "\v" in the beginning labels the pattern "very magic" for brevity. Seems to work.