# C++ backend handover

###### tags: `functional cycle 10`

Appetite: full cycle

Developer: Peter, Felix

## Goal

Define and work on a task for introducing Peter to the `gridtools::fn`.

E.g.
- [ ] maybe unify Cartesian and unstructured
- [x] vertical indirection
- ~~tuple support on the fencil level~~
- ~~math builtins~~