unicode scalarを読むことにした

Package.swift

@@ -5,6 +5,9 @@ import PackageDescription
 
 let package = Package(
     name: "SwiftKilo",
+    platforms: [
+        .macOS(.v12)
+    ],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),

Sources/SwiftKilo/SwiftKilo.swift

@@ -19,27 +19,10 @@ public class SwiftKilo {
     private func main() async throws {
         enableRawMode()
 
-        let keyPath = \String.count
-
-        let shouldWaitFlag = Container(content: true)
-        let iterator = Container(content: FileHandle.standardInput.bytes.characters.makeAsyncIterator())
-
-        let readTask = Task.detached {
-            return try await iterator.content
-        }
-
-        let timeoutTask = Task.detached {
-            while await shouldWaitFlag.content {
-                try await Task.sleep(nanoseconds: 1_000)
-            }
-
+        for try await scalar in FileHandle.standardInput.bytes.unicodeScalars {
+            guard scalar != "q" else { break }
 
-        }
-
-        for try await character in FileHandle.standardInput.bytes.characters {
-            guard character != "q" else { break }
-
-            print(character)
+            print(scalar)
         }
     }
 
@@ -56,21 +39,3 @@ public class SwiftKilo {
         tcsetattr(STDIN_FILENO, TCSAFLUSH, &origTermios)
     }
 }
-
-actor Container<T> {
-    var content: T
-
-    init(content: T) {
-        self.content = content
-    }
-
-    func set(_ content: T) {
-        self.content = content
-    }
-}
-
-extension Container where T: AsyncIteratorProtocol {
-    func next() async throws -> T.Element? {
-        try await content.next()
-    }
-}

Tests/SwiftKiloTests/SwiftKiloTests.swift

@@ -2,43 +2,4 @@ import XCTest
 import System
 @testable import SwiftKilo
 
-final class SwiftKiloTests: XCTestCase {
-    func testExample() async throws {
-        let (inHandle, outHandle): (FileHandle, FileHandle) = {
-            let pipe = Pipe()
-            return (pipe.fileHandleForWriting, pipe.fileHandleForReading)
-        }()
-
-        Task.detached {
-            try await Task.sleep(nanoseconds: 1_000_000)
-            try inHandle.write(contentsOf: [0])
-            try inHandle.write(contentsOf: [1])
-            try inHandle.write(contentsOf: [2])
-            try inHandle.write(contentsOf: [3])
-        }
-
-        let testTask = Task {
-            var bytes = [UInt8]()
-
-            for try await byte in outHandle.bytes {
-                bytes.append(byte)
-
-                if bytes == [0, 1, 2, 3] {
-                    break
-                }
-            }
-        }
-
-        let timeoutTask = Task {
-            try await Task.sleep(nanoseconds: 5_000_000)
-            testTask.cancel()
-        }
-
-        do {
-            _ = try await testTask.value
-            timeoutTask.cancel()
-        } catch {
-            XCTFail("timeout")
-        }
-    }
-}
+final class SwiftKiloTests: XCTestCase {}