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Alex Shapiro
8c0a2015be
Serde's `ContentDeserializer` and `ContentRefDeserializer`
cannot deserialize struct enum variant associated data when
that data is encoded as a sequence. This failure leads to
errors when decoding an enum nested in another untagged
enum. For example:
#[derive(Serialize, Deserialize)]
#[serde(untagged)]
enum Foo {
A(Bar),
}
#[derive(Serialize, Deserialize)]
enum Bar {
B{f1: String},
}
let data1 = Foo::A(Bar::B{f1: "Hello".into()});
let bytes = rmp_serde::to_vec(&data1).unwrap();
let data2 = rmp_serde::from_slice::<Foo>(&bytes).unwrap();
Deserializing fails with the error `Syntax("data did not
match any variant of untagged enum Foo")`, but the
underlying failure occurs when decoding the associated data
of `Bar::B`.
This pull request fixes the issue by allowing
`ContentDeserializer` and `ContentRefDeserializer` to
deserialize sequence-encoded struct enum variant data.
Serde 
Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.
You may be looking for:
- An overview of Serde
- Data formats supported by Serde
- Setting up
#[derive(Serialize, Deserialize)] - Examples
- API documentation
- Release notes
Serde in action
Click to show Cargo.toml. Run this code in the playground.
[dependencies]
# The core APIs, including the Serialize and Deserialize traits. Always
# required when using Serde.
serde = "1.0"
# Support for #[derive(Serialize, Deserialize)]. Required if you want Serde
# to work for structs and enums defined in your crate.
serde_derive = "1.0"
# Each data format lives in its own crate; the sample code below uses JSON
# but you may be using a different one.
serde_json = "1.0"
#[macro_use]
extern crate serde_derive;
extern crate serde;
extern crate serde_json;
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
Getting help
Serde developers live in the #serde channel on
irc.mozilla.org. The #rust channel is also a
good resource with generally faster response time but less specific knowledge
about Serde. If IRC is not your thing or you don't get a good response, we are
happy to respond to GitHub issues
as well.
License
Serde is licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.