If you control every implementation (ie you aren’t writing a library where others will implement your interfaces), then tagged unions are a simple way to accomp

If you control every implementation (ie you aren’t writing a library where others will implement your interfaces), then tagged unions are a simple way to accomplish this. See the bottom of this page: https://www.openmymind.net/Zig-Interfaces/ https://www.openmymind.net/Zig-Interfaces/