Made a simple async iterator out of pure async

asyncnext/Cargo.lock

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asyncnext/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "asyncnext"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1.37.0", features = ["rt", "fs", "macros"] }

asyncnext/README.md

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+# AsyncNext
+
+Trying to write my own async next() thingy.

asyncnext/src/main.rs

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+use std::path::Path;
+use std::path::PathBuf;
+
+use tokio::fs::ReadDir;
+
+struct Walker {
+    path: PathBuf,
+}
+
+impl Walker {
+    pub fn new(base: &Path) -> Self {
+        Self {
+            path: base.to_path_buf(),
+        }
+    }
+
+    pub async fn children(&self) -> WalkerIterator {
+        WalkerIterator::new(&self.path).await
+    }
+}
+
+struct WalkerIterator {
+    walking: ReadDir,
+}
+
+impl WalkerIterator {
+    async fn new(path: &Path) -> Self {
+        Self {
+            walking: tokio::fs::read_dir(&path).await.unwrap(),
+        }
+    }
+
+    async fn next(&mut self) -> Option<String> {
+        let current = self.walking.next_entry().await.ok()??;
+        Some(current.file_name().to_string_lossy().to_string())
+    }
+}
+
+#[tokio::main(flavor = "current_thread")]
+async fn main() {
+    let mut args = std::env::args();
+    let _ = args.next();
+    let base_path = args.next().unwrap();
+
+    let walker = Walker::new(&Path::new(&base_path).canonicalize().unwrap());
+    let mut iter = walker.children().await;
+    while let Some(child) = iter.next().await {
+        println!("{child}");
+    }
+
+    //while let Some(child) = walker.children().await.next().await {
+    //    println!("{child}")
+    //}
+}