Consolidate nullable logic out of IObjectMappers #1987
Description
We have nullable logic all over the place. Both in terms of checking types and doing mapping junk. I want to move the nullable stuff that's junking up our IObjectMappers out.
Here's the basic logic for two values:
| Source | Dest | Src Value | Dest Value |
|---|---|---|---|
| T | U? | T | Map(T, U) |
| T | U? | default(T) | Map(T, U) |
| T? | U | T | Map(T, U) |
| T? | U | null | default(U) |
| T? | U? | T | Map(T, U) |
| T? | U? | null | default(U?) |
| V | U | V | Map(V, U) |
| V | U | null | default(U) |
| V | U? | V | Map(V, U) |
| V | U? | null | default(U?) |
where T: struct, V: class
I think we could wrap this logic in one place for top-level maps and member-level maps.