From 2c3aba67a30ec34bb788f67cd292906baf3c5c7d Mon Sep 17 00:00:00 2001
From: Honza Dvorsky <honza@apple.com>
Date: Mon, 17 Jul 2023 09:41:39 +0200
Subject: [PATCH 1/2] Disable ExistentialAny temporarily

---
 Package.swift | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/Package.swift b/Package.swift
index 0c48d93..d89db3c 100644
--- a/Package.swift
+++ b/Package.swift
@@ -15,13 +15,6 @@
 import Foundation
 import PackageDescription
 
-// General Swift-settings for all targets.
-let swiftSettings: [SwiftSetting] = [
-    // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
-    // Require `any` for existential types.
-    .enableUpcomingFeature("ExistentialAny")
-]
-
 let package = Package(
     name: "swift-openapi-async-http-client",
     platforms: [
@@ -46,15 +39,13 @@ let package = Package(
                 .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
                 .product(name: "AsyncHTTPClient", package: "async-http-client"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
-            ],
-            swiftSettings: swiftSettings
+            ]
         ),
         .testTarget(
             name: "OpenAPIAsyncHTTPClientTests",
             dependencies: [
                 "OpenAPIAsyncHTTPClient",
-            ],
-            swiftSettings: swiftSettings
+            ]
         ),
     ]
 )

From 7b5b0e5674187344087f981896af9a4b380bec25 Mon Sep 17 00:00:00 2001
From: Honza Dvorsky <honza@apple.com>
Date: Mon, 17 Jul 2023 11:15:23 +0200
Subject: [PATCH 2/2] PR feedback

---
 Package.swift | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/Package.swift b/Package.swift
index d89db3c..04afd62 100644
--- a/Package.swift
+++ b/Package.swift
@@ -15,6 +15,17 @@
 import Foundation
 import PackageDescription
 
+// General Swift-settings for all targets.
+var swiftSettings: [SwiftSetting] = []
+
+#if swift(>=5.9)
+swiftSettings.append(
+    // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
+    // Require `any` for existential types.
+    .enableUpcomingFeature("ExistentialAny")
+)
+#endif
+
 let package = Package(
     name: "swift-openapi-async-http-client",
     platforms: [
@@ -39,13 +50,15 @@ let package = Package(
                 .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
                 .product(name: "AsyncHTTPClient", package: "async-http-client"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
-            ]
+            ],
+            swiftSettings: swiftSettings
         ),
         .testTarget(
             name: "OpenAPIAsyncHTTPClientTests",
             dependencies: [
                 "OpenAPIAsyncHTTPClient",
-            ]
+            ],
+            swiftSettings: swiftSettings
         ),
     ]
 )