Goal

Have a documented consensus on which types to use in Cython code.

Types

We should distinguish between floating point numbers and integers. We may also split the use cases of integers: As data value and as index for pointers and memoryviews.

Linked issues

#24153, #25555 (comment), #23865 (comment), #23865 (comment)

Also note the Cython bug with const types: cython/cython#5230