Iteration with the Previous Result

I am working with zip archives and wanted to create an archive for my unittesting. This creation does no touch the file system so I need to specify the structure.

To facilitate directory structure I'll need to archive the directory tree. Actually for my purposes it looks like I don't but that isn't the point.

I put together this range which allow for create each stage of directory, With Previous.

 import std.path; import std.algorithm; static assert(r"foo/bar/foobar".pathSplitter .withPrevious!buildPath .equal([ buildPath("foo"), buildPath("foo","bar"), buildPath("foo","bar","foobar")])); 

I specify a path as a string and use pathSplitter to provide each part of the path.

I feed this to my withPrevious range and utilizes buildPath to create a OS specific path from components.

The result is equal to each part built on the previous. I don't think I will utilize this for my unittests, but I do like what this provides and is not specific to paths or strings.