//! An example showing off the usage of `Deserialize` to automatically decode //! TOML into a Rust `struct` #![deny(warnings)] extern crate toml; extern crate serde; #[macro_use] extern crate serde_derive; /// 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, Deserialize)] 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, Deserialize)] struct ServerConfig { ip: Option, port: Option, } #[derive(Debug, Deserialize)] 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" "#; let decoded: Config = toml::from_str(toml_str).unwrap(); println!("{:#?}", decoded); }