[Issue 23201] New: std.ranges doesn't have any thing to handle extremely nested ranges

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23201

          Issue ID: 23201
           Summary: std.ranges doesn't have any thing to handle extremely
                    nested ranges
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: crazymonkyyy at gmail.com

Created attachment 1856
  --> https://issues.dlang.org/attachment.cgi?id=1856&action=edit
Describe the attachment briefly.

I was playing with subdividing polygons, i.e. `shape[] foo(shape)` type
headers, with stacking 6 functions on top of each other. Working with it
without writing some utilities was needlessly verbose
`a.map!(a=>a.map!(a=>a.map!(a=>a.map!(` etc.

there should probably be some basic utilities in the std

feel free to clean up my code or use it for inspiration

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