From 80c0cfd2f0a4decc6c147729225888af3c7152d0 Mon Sep 17 00:00:00 2001 From: Alex Crichton Date: Sun, 2 Oct 2016 23:26:51 -0700 Subject: Touch up the `decode` example --- examples/decode.rs | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ examples/struct.rs | 51 --------------------------------------------- 2 files changed, 61 insertions(+), 51 deletions(-) create mode 100644 examples/decode.rs delete mode 100644 examples/struct.rs diff --git a/examples/decode.rs b/examples/decode.rs new file mode 100644 index 0000000..9124596 --- /dev/null +++ b/examples/decode.rs @@ -0,0 +1,61 @@ +//! An example showing off the usage of `RustcDecodable` to automatically decode +//! TOML into a Rust `struct` +//! +//! Note that this works similarly with `serde` as well. + +#![deny(warnings)] + +extern crate toml; +extern crate rustc_serialize; + +/// This is what we're going to decode into. Each field is optional, meaning +/// that it doesn't have to be present in TOML. +#[derive(Debug, RustcDecodable)] +struct Config { + global_string: Option, + global_integer: Option, + server: Option, + peers: Option>, +} + +/// Sub-structs are decoded from tables, so this will decode from the `[server]` +/// table. +/// +/// Again, each field is optional, meaning they don't have to be present. +#[derive(Debug, RustcDecodable)] +struct ServerConfig { + ip: Option, + port: Option, +} + +#[derive(Debug, RustcDecodable)] +struct PeerConfig { + ip: Option, + port: Option, +} + +fn main() { + let toml_str = r#" + global_string = "test" + global_integer = 5 + + [server] + ip = "127.0.0.1" + port = 80 + + [[peers]] + ip = "127.0.0.1" + port = 8080 + + [[peers]] + ip = "127.0.0.1" + "#; + + // Use the `decode_str` convenience here to decode a TOML string directly + // into the `Config` struct. + // + // Note that the errors reported here won't necessarily be the best, but you + // can get higher fidelity errors working with `toml::Parser` directly. + let decoded: Config = toml::decode_str(toml_str).unwrap(); + println!("{:#?}", decoded); +} diff --git a/examples/struct.rs b/examples/struct.rs deleted file mode 100644 index 52b2eb7..0000000 --- a/examples/struct.rs +++ /dev/null @@ -1,51 +0,0 @@ -#![deny(warnings)] -extern crate toml; -extern crate rustc_serialize; - -use rustc_serialize::Decodable; - -#[derive(Debug,RustcDecodable)] -struct Config { - global_string: Option, - global_integer: Option, - server: Option, - peers: Option>, -} - -#[derive(Debug,RustcDecodable)] -struct ServerConfig { - ip: Option, - port: Option, -} - -#[derive(Debug,RustcDecodable)] -struct PeerConfig { - ip: Option, - port: Option, -} - -fn main() { - let toml_str = r#" - global_string = "test" - global_integer = 5 - - [server] - ip = "127.0.0.1" - port = 80 - - [[peers]] - ip = "127.0.0.1" - port = 8080 - - [[peers]] - ip = "127.0.0.1" - port = 8081 - "#; - - let toml = toml::Parser::new(&toml_str).parse().unwrap(); - - let mut decoder = toml::Decoder::new(toml::Value::Table(toml)); - let decoded = Config::decode(&mut decoder).unwrap(); - - println!("{:?}", decoded); -} -- cgit v1.2.3