Resolve driver vs. receiver based on usage for certain types of operations

[mkorbel1]

Motivation

For some types of operations, one may wish to use the result of an operation as either a driver or a receiver. A common example would be swizzles or subsets.

For example, these are currently NOT supported:

// swizzle as a receiver
[a, b].swizzle() <= c;

// subset as a receiver
d.slice(3, 2) <= e;

There are other ways to achieve these (e.g. assignSubset, withSet), but there's still some desire to assign these, especially for those coming from SystemVerilog.

Desired solution

Create a way for some implementer of Logic to determine "late" whether it should behave as a driver or a receiver. Upon connection to another signal, it can determine whether it should act as a driver or a receiver. This mechanism can be reused for multiple scenarios, including the examples above.

Alternatives considered

No response

Additional details

No response