Add example for decoding toml to struct

examples/struct.rs

@@ -0,0 +1,51 @@
+#![deny(warnings)]
+extern crate toml;
+extern crate rustc_serialize;
+
+use rustc_serialize::Decodable;
+
+#[derive(Debug,RustcDecodable)]
+struct Config {
+    global_string: Option<String>,
+    global_integer: Option<u64>,
+    server: Option<ServerConfig>,
+    peers: Option<Vec<PeerConfig>>,
+}
+
+#[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"
+            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);
+}