Add an async Connection.send in LanguageServerProtocolTransport

Sources/LanguageServerProtocolTransport/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_library(LanguageServerProtocolTransport
   BuildServerMessageDependencyTracker.swift
+  Connection+Send.swift
   DisableSigpipe.swift
   DocumentURI+CustomLogStringConvertible.swift
   JSONRPCConnection.swift

Sources/LanguageServerProtocolTransport/Connection+Send.swift

@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+public import LanguageServerProtocol
+@_spi(SourceKitLSP) private import ToolsProtocolsSwiftExtensions
+
+extension Connection {
+  public func send<R: RequestType>(_ request: R) async throws -> R.Response {
+    return try await withCancellableCheckedThrowingContinuation { continuation in
+      return self.send(request) { result in
+        continuation.resume(with: result)
+      }
+    } cancel: { requestID in
+      self.send(CancelRequestNotification(id: requestID))
+    }
+  }
+}