Get sizeOf the active field of a tagged union?

[tensorush]

See static dispatch pattern from Zig Patterns:

Zig Patterns

Zig patterns, listed here, are either consistently recurring code patterns from the Zig Standard Library (0.14.0) or lesser known language construct usage examples from the Zig Language Reference (0.14.0). Closure Context File struct Decl literals Enum index Generic type Error payloads Generic function Default arguments @enumFromString Module-wide options Custom type formatting Granular error handling Side-computation block Hashed mappings storage S…