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David Tolnay 1d719b542c
Not safe to share Spans from one ParseSess to another
Spans in the AST returned by `parse_item_from_source_str` and other parsing
functions contain byte offsets into the source code they were parsed from. The
pretty printer uses these Spans [here][1] to preserve the representation of
literals when parsing and printing back out unmodified.

In this bug, the byte offset of a string in the input to
`parse_item_from_source_str` coincidentally matched the byte offset of a totally
different string in the input to `parse_crate_from_file` called [here][2] by
Syntex. The Span from the former triggered the pretty printer to write out the
content of the latter.

By using the same ParseSess, Spans from the two `parse_*` calls never collide.

[1]: https://github.com/rust-lang/rust/blob/1.12.0/src/libsyntax/print/pprust.rs#L628
[2]: https://github.com/serde-rs/syntex/blob/v0.45.0/syntex/src/registry.rs#L134
2016-10-17 23:12:32 -07:00
examples/serde-syntex-example Rename rustc_macro to proc_macro 2016-10-08 18:29:36 -04:00
serde Release 0.8.13 2016-10-16 10:34:26 -07:00
serde_codegen Not safe to share Spans from one ParseSess to another 2016-10-17 23:12:32 -07:00
serde_codegen_internals Release 0.8.12 2016-10-08 15:38:29 -07:00
serde_derive Release 0.8.13 2016-10-16 10:34:26 -07:00
serde_test Release 0.8.13 2016-10-16 10:34:26 -07:00
testing Release 0.8.13 2016-10-16 10:34:26 -07:00
.gitignore chore(git): Ignore swap files 2015-10-19 09:46:04 -07:00
.travis.yml Drop support for rust 1.8.0 and 1.9.0. 2016-10-15 14:43:30 -07:00
CONTRIBUTING.md Add a contributing guide 2016-06-22 07:04:13 -07:00
LICENSE Optimize serialization 2014-06-22 10:33:45 -04:00
LICENSE-APACHE Optimize serialization 2014-06-22 10:33:45 -04:00
LICENSE-MIT Optimize serialization 2014-06-22 10:33:45 -04:00
README.md Rename rustc_macro to proc_macro 2016-10-08 18:29:36 -04:00

Serde Build Status Latest Version

Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.


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Serde in action

#![feature(proc_macro)]

#[macro_use]
extern crate serde_derive;

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, we are happy to respond to GitHub issues as well.

License

Serde is licensed under either of

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.