Making a mess of types

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transformertest/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "transformertest"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+async-trait = "0.1.73"
+supertrait = "0.1.0"
+tokio = { version = "1.31.0", features = ["rt", "macros", "fs", "io-util", "sync"] }

transformertest/README.md

@@ -0,0 +1,3 @@
+# TransformerTest
+
+Trying a different approach to Actors: Transformers.

transformertest/src/main.rs

@@ -0,0 +1,47 @@
+use std::path::PathBuf;
+
+use transformer::Generator;
+// use transformer::Processor;
+use transformer::Source;
+// use transformer::Transformer;
+
+mod transformer;
+
+struct Input {}
+#[async_trait::async_trait]
+impl Generator for Input {
+    type Output = PathBuf;
+
+    async fn next(&self) -> Option<PathBuf> {}
+}
+
+// struct PathBufToString {}
+// impl Processor for PathBufToString {
+//     type Input = PathBuf;
+//     type Output = String;
+
+//     fn transform(&self, data: PathBuf) -> String {
+//         data.to_string_lossy().to_string()
+//     }
+// }
+
+// struct Printer {}
+// impl Processor for Printer {
+//     type Input = String;
+//     type Output = ();   // this is a sync
+
+//     fn transform(&self, data: String) -> () {
+//         println!("{:?}", data);
+//     }
+// }
+
+fn main() {
+    let gen = Source::new(Input {});
+    // let pbts = Transformer::new(PathBufToString {});
+    // let printer = Transformer::new(Printer {});
+
+    // gen.chain(pbts);
+    // pbts.chain(printer);
+
+    // run(printer, pbts, gen);
+}

transformertest/src/transformer.rs

@@ -0,0 +1,64 @@
+//! Transformers framework.
+
+use tokio::task::JoinHandle;
+
+#[async_trait::async_trait]
+pub trait Generator {
+    type Output;
+
+    async fn next(&self) -> Option<Self::Output>;
+}
+
+pub trait Processor {
+    type Input;
+    type Output;
+
+    fn transform(&self, data: Self::Input) -> Self::Output;
+}
+
+pub struct Transformer<P: Processor> {
+    chain: Vec<Transformer<dyn Processor<Input = P::Output>>>,
+    processor: P,
+}
+
+pub struct Source<G> where G: Generator {
+    chain: Vec<Transformer<dyn Processor<Input = G::Output>>>,
+    generator: G,
+}
+
+impl<G: Generator> Source<G> {
+    pub fn new(gen: G) -> Self {
+        Self {
+            chain: vec![],
+            generator: gen,
+        }
+    }
+
+    pub fn chain(&mut self, next: Transformer<G::Output> ) {
+        self.chain.push(next);
+    }
+
+    // pub async fn spawn(&self) -> JoinHandle<()> {
+    //     tokio::spawn(async {
+    //         while let Some(data) = gen.next().await {
+    //             for next in self.chain {
+    //                 next.send(data).await.unwrap();
+    //             }
+    //         }
+    //     })
+    // }
+}
+
+
+// impl<P: Processor> Transformer<P> {
+//     pub fn new(proc: P) -> Self {
+//         Self {
+//             chain: vec![],
+//             processor: proc
+//         }
+//     }
+
+//     pub fn chain(&mut self, next: Transformer<P::Output>) {
+//         self.chain.push(next);
+//     }
+// }