undefined | Better HN

0 pointsq3k5y ago0 comments

How would you express deserializing these 'polymorphic JSON' objects using serde/Rust?

0 comments

3 comments · 1 top-level

speedgoose5y ago· 2 in thread

Using a rust enum I guess.

q3kOP5y ago

You're right, this does seem to work [1]. I wasn't aware that serde would attempt to deserialize multiple enum variants until something matches.

[1] - https://serde.rs/enum-representations.html#untagged

masklinn5y ago

Yeah that's a rather common scheme out there so Serde does provide built-in support for this deserialisation. Probably better for deserialisation performances to use properly tagged enums, but if you don't have a choice Serde's got your back.

j / k navigate · click thread line to collapse