Is there a HashMap type?

[TTWNO]

I would like to know if there is a way to generate a HashMap<K, V> in Rust?

Pretty sure it could be emulated with list<tuple<K, V>>, but not sure if that's recognized as a special case or not.

Thanks,

[Michael-F-Bryan]

For now, I would use a list<tuple<K, V>> or tuple<list<K>, list<V>>¹ to transfer key-value pairs between the host and guest, then reassemble the HashMap manually.

I've created a ticket on the WAI repo to track this - wasmerio/wai#40.

Footnotes

1. they're roughly equivalent, but the former is more convenient to work with, while the latter can be slightly more efficient to transfer because tuple<K, V> might add padding. ↩