Differentiated Serialization Formats for Structs

[XuJiandong]

Problem Statement

I have the following struct definitions:

#[derive(Serialize, Deserialize)]
struct TypeA {
    // ...
}

#[derive(Serialize, Deserialize)]
#[special_compact]
struct TypeB {
    // ...
}

The goal is to serialize TypeA and TypeB into different formats. Specifically, TypeB should be serialized into a more compact format than TypeA.

Expected Behavior

• TypeA should be serialized using the default serialization format.
• TypeB should be serialized using a custom, compact format as indicated by the #[special_compact] attribute.

Actual Behavior

Currently, both TypeA and TypeB are serialized using the same format, and there doesn't seem to be an out-of-the-box solution for differentiating their serialization formats.

Request for Solution

Is there a way to achieve this within the current framework of serde? If not, could you provide guidance or a potential feature enhancement to support this functionality?

Thank you!