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authorAlex Crichton <alex@alexcrichton.com>2016-10-02 23:26:51 -0700
committerAlex Crichton <alex@alexcrichton.com>2016-10-02 23:26:51 -0700
commit80c0cfd2f0a4decc6c147729225888af3c7152d0 (patch)
treedfbc7dfa9f1ea2b6c9f0ff312a8f7b1b958d791c /examples
parent680e5dc0701e198e32b8ea5a192e84c01e6a16de (diff)
downloadmilf-rs-80c0cfd2f0a4decc6c147729225888af3c7152d0.tar.gz
milf-rs-80c0cfd2f0a4decc6c147729225888af3c7152d0.zip
Touch up the `decode` example
Diffstat (limited to 'examples')
-rw-r--r--examples/decode.rs61
-rw-r--r--examples/struct.rs51
2 files changed, 61 insertions, 51 deletions
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<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);
+}
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<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);
-}