👀 Views: 95 💬 Answers: 1 📅 Created: 2025-06-07

rust serde enum serialization Rust

I'm having trouble serializing a Rust enum that contains a custom struct with `serde`. I'm working with Rust 1.63 and `serde` 1.0.130. My enum looks like this: ```rust use serde::{Serialize, Deserialize}; #[derive(Serialize, Deserialize, Debug)] pub enum MyEnum { VariantA, VariantB(CustomStruct), } #[derive(Serialize, Deserialize, Debug)] pub struct CustomStruct { field1: String, field2: i32, } ``` When I try to serialize an instance of `MyEnum`, specifically `VariantB`, using `serde_json`, I get the following behavior: ``` behavior: expected value, found `}` ``` Here’s the code snippet I’m using to test serialization: ```rust use serde_json; fn main() { let my_instance = MyEnum::VariantB(CustomStruct { field1: "example".to_string(), field2: 42, }); let serialized = serde_json::to_string(&my_instance); match serialized { Ok(json) => println!("Serialized JSON: {}", json), Err(e) => eprintln!("Serialization behavior: {}", e), } } ``` I can serialize simple enums without any issues, but the addition of `CustomStruct` seems to cause this unexpected behavior. I've checked that all fields in `CustomStruct` are also serializable, so I'm not sure what I'm missing. Is there something specific I need to do when serializing enums that contain custom struct types? Any help would be greatly appreciated! For context: I'm using Rust on Ubuntu. Is there a better approach?