What is the approach to store function pointers of different types in a HashMap?

[wanton marten]

I have a StringHashMap to store various functions by name. The functions have different parameter count and different parameter types. StringHashMap needs a uniform value type.

[tranquil folio]

one option is *const anyopaque, then ptrCast to the desired function pointer type

[neat fog]

or use a union

or a tagged union for more safety

[tranquil folio]

in debug/releasesafe, untagged unions are tagged right?

[neat fog]

yeah

[wanton marten]

Great suggestions. Thanks!

[neon blade]

would this require an @addrSpaceCast as well? or does zig assume von neumann architecture?

[tranquil folio]

I don't think zig uses a separate address space for functions right now, even on wasm. Maybe that could change in the future

[neat fog]

does not require an addrSpaceCast, even on wasm