62 lines
1.5 KiB
Rust
62 lines
1.5 KiB
Rust
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//! An example showing off the usage of `RustcDecodable` to automatically decode
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//! TOML into a Rust `struct`
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//!
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//! Note that this works similarly with `serde` as well.
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#![deny(warnings)]
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extern crate toml;
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extern crate rustc_serialize;
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/// This is what we're going to decode into. Each field is optional, meaning
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/// that it doesn't have to be present in TOML.
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#[derive(Debug, RustcDecodable)]
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struct Config {
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global_string: Option<String>,
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global_integer: Option<u64>,
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server: Option<ServerConfig>,
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peers: Option<Vec<PeerConfig>>,
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}
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/// Sub-structs are decoded from tables, so this will decode from the `[server]`
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/// table.
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///
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/// Again, each field is optional, meaning they don't have to be present.
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#[derive(Debug, RustcDecodable)]
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struct ServerConfig {
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ip: Option<String>,
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port: Option<u64>,
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}
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#[derive(Debug, RustcDecodable)]
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struct PeerConfig {
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ip: Option<String>,
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port: Option<u64>,
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}
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fn main() {
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let toml_str = r#"
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global_string = "test"
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global_integer = 5
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[server]
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ip = "127.0.0.1"
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port = 80
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[[peers]]
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ip = "127.0.0.1"
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port = 8080
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[[peers]]
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ip = "127.0.0.1"
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"#;
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// Use the `decode_str` convenience here to decode a TOML string directly
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// into the `Config` struct.
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//
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// Note that the errors reported here won't necessarily be the best, but you
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// can get higher fidelity errors working with `toml::Parser` directly.
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let decoded: Config = toml::decode_str(toml_str).unwrap();
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println!("{:#?}", decoded);
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}
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