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//! 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<String>,
global_integer: Option<u64>,
server: Option<ServerConfig>,
peers: Option<Vec<PeerConfig>>,
}
/// 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<String>,
port: Option<u64>,
}
#[derive(Debug, RustcDecodable)]
struct PeerConfig {
ip: Option<String>,
port: Option<u64>,
}
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);
}
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