In the last days I have been working on supporting closures for Pipp. Yes, you've read correctly. The next version of PHP will support real closures. See
Closures are connected with lexical variables, so I had I had to rethink the way I handle variables in Pipp. Initially I had the variables outside functions as package variables. Since this doesn't play well with closures, and as there are problems with included files, I changed those to lexical variables. This was the major part of the work. Thanks to Patrich Michaud for advising me where I should define the lexicals.
After switching to lexicals everywhere I followed my usual approach and tried to do the same as Rakudo does. This worked without hassle for a simple case.
correctly gives:
+one plusBut when I create a second closure I run into problems.
incorrectly gives:
++++one plus ++++four plussesLooks like I need to fiddle some more.
