The casserole crate provides a custom derive and a trait to perform break-down serialization and serialization of Rust types to into content-addressable storage.

```rust /// Example Tree to be stored in the database

[derive(Casserole)]

struct Node { header: String,

// Tells that 'map' is replaced by a database key in the type returned from
// the 'casserole' trait method. The 'decasserole' trait method will do the
// reverse, restoring it from the database.
#[casserole(store)]
map: BTreeMap<String, Node>,

} ```

Basic usage demonstration (given big_value as a large value to work with):

``rust // Obtain a reference to an example store (can be persistent or in-memory). //JSONMemorySHA1` is like the Git database, but with base64 string as keys, // and serde-json output as values. let mut store = casserole::store::json::JSONMemorySHA1::new();

// Create a our serde-ready type for the root. stored_root is our unique // representation for big_value, but it is very small, like a 'Git hash'. let storedroot = bigvalue.casserole(&mut store).unwrap();

// <...do other stuff...>

// Restore the origin value from the database let restoredbigvalue = Casserole::decasserole(&stored, &mut store).unwrap(); asserteq!(restoredbigvalue, bigvalue); ```