Intersect two domain values for a filter type

Combines two already-computed domain values (not value-vs-domain) into their intersection, dispatching on filter type. Used by `"filter"`-mode domain propagation when the same logical filter appears in more than one upstream step and its effective domains must be combined. Unlike [cb_intersect_domain()], this never emits trimming messages.

Usage

cb_intersect_domain_values(filter, ...)

Arguments

filter

S7 filter object (used for type dispatch only).

...

Additional arguments. Methods receive two domain values `a` and `b` to intersect (either may be `NULL`).

Value

The intersected domain value, or `NULL`.