Disable werror due to warning of cucurrency

Package.swift

@@ -20,6 +20,7 @@ func envEnable(_ key: String, default defaultValue: Bool = false) -> Bool {
 var sharedSwiftSettings: [SwiftSetting] = [
     .enableUpcomingFeature("BareSlashRegexLiterals"),
     .enableUpcomingFeature("InternalImportsByDefault"),
+    .enableUpcomingFeature("InferSendableFromCaptures"),
     .define("OPENSWIFTUI_SUPPRESS_DEPRECATED_WARNINGS"),
     .swiftLanguageMode(.v5),
 ]
@@ -74,7 +75,11 @@ if development {
 
 let warningsAsErrorsCondition = envEnable("OPENSWIFTUI_WERROR", default: isXcodeEnv && development)
 if warningsAsErrorsCondition {
-   sharedSwiftSettings.append(.unsafeFlags(["-warnings-as-errors"]))
+    // Hold off the werror feature as we can't avoid the concurrency warning.
+    // Reenable the folllowing after swift-evolution#443 is release.
+
+    // sharedSwiftSettings.append(.unsafeFlags(["-warnings-as-errors"]))
+    // sharedSwiftSettings.append(.unsafeFlags(["-Wwarning", "concurrency"]))
 }
 
 // NOTE:

Sources/OpenSwiftUICore/Modifier/ViewModifier/TODO/_EnvironmentKeyWritingModifier.swift

@@ -6,12 +6,11 @@
 //  Status: WIP
 
 @frozen
-public struct _EnvironmentKeyWritingModifier<Value>: ViewModifier/*, _GraphInputsModifier*/ {
+public struct _EnvironmentKeyWritingModifier<Value>: ViewModifier, _GraphInputsModifier, PrimitiveViewModifier {
     public var keyPath: WritableKeyPath<EnvironmentValues, Value>
     public var value: Value
 
     @inlinable
-    @inline(__always)
     public init(keyPath: WritableKeyPath<EnvironmentValues, Value>, value: Value) {
         self.keyPath = keyPath
         self.value = value
@@ -20,11 +19,15 @@ public struct _EnvironmentKeyWritingModifier<Value>: ViewModifier/*, _GraphInput
     public static func _makeInputs(modifier: _GraphValue<_EnvironmentKeyWritingModifier<Value>>, inputs: inout _GraphInputs) {
         // TODO
     }
+
+
 }
 
+@available(*, unavailable)
+extension _EnvironmentKeyWritingModifier: Sendable {}
+
 extension View {
     @inlinable
-    @inline(__always)
     nonisolated public func environment<V>(_ keyPath: WritableKeyPath<EnvironmentValues, V>, _ value: V) -> some View {
         modifier(_EnvironmentKeyWritingModifier<V>(keyPath: keyPath, value: value))
     }

Sources/OpenSwiftUICore/Modifier/ViewModifier/ViewModifier.swift

@@ -1,6 +1,6 @@
 //
 //  ViewModifier.swift
-//  OpenSwiftUI
+//  OpenSwiftUICore
 //
 //  Audited for iOS 15.5
 //  Status: Complete
@@ -48,68 +48,45 @@
 /// Downtown Bus. A view extension, using custom a modifier, renders the
 ///  caption in blue text surrounded by a rounded
 ///  rectangle.](OpenSwiftUI-View-ViewModifier.png)
+@MainActor
+@preconcurrency
 public protocol ViewModifier {
-    /// The type of view representing the body.
-    associatedtype Body: View
-
     /// Makes a new view using the view modifier and inputs that you provide.
-    static func _makeView(
+    nonisolated static func _makeView(
         modifier: _GraphValue<Self>,
         inputs: _ViewInputs,
         body: @escaping (_Graph, _ViewInputs) -> _ViewOutputs
     ) -> _ViewOutputs
 
-    static func _makeViewList(
+    nonisolated static func _makeViewList(
         modifier: _GraphValue<Self>,
         inputs: _ViewListInputs,
         body: @escaping (_Graph, _ViewListInputs) -> _ViewListOutputs
     ) -> _ViewListOutputs
 
     /// The number of views that `_makeViewList()` would produce, or
     /// nil if unknown.
-    static func _viewListCount(
+    nonisolated static func _viewListCount(
         inputs: _ViewListCountInputs,
         body: (_ViewListCountInputs) -> Int?
     ) -> Int?
 
-    /// The content view type passed to `body()`.
-    typealias Content = _ViewModifier_Content<Self>
+    /// The type of view representing the body.
+    associatedtype Body: View
 
     /// Gets the current body of the caller.
     ///
     /// `content` is a proxy for the view that will have the modifier
     /// represented by `Self` applied to it.
     @ViewBuilder
-    @MainActor
-    @preconcurrency
     func body(content: Content) -> Body
-}
-
-extension ViewModifier {
-    public static func _makeView(
-        modifier: _GraphValue<Self>,
-        inputs: _ViewInputs,
-        body: @escaping (_Graph, _ViewInputs) -> _ViewOutputs
-    ) -> _ViewOutputs {
-        makeView(modifier: modifier, inputs: inputs, body: body)
-    }
 
-    public static func _makeViewList(
-        modifier: _GraphValue<Self>,
-        inputs: _ViewListInputs,
-        body: @escaping (_Graph, _ViewListInputs) -> _ViewListOutputs
-    ) -> _ViewListOutputs {
-        makeViewList(modifier: modifier, inputs: inputs, body: body)
-    }
-
-    public static func _viewListCount(
-        inputs: _ViewListCountInputs,
-        body: (_ViewListCountInputs) -> Int?
-    ) -> Int? {
-        viewListCount(inputs: inputs, body: body)
-    }
+    /// The content view type passed to `body()`.
+    typealias Content = _ViewModifier_Content<Self>
 }
 
+package protocol PrimitiveViewModifier: ViewModifier where Body == Never {}
+
 extension ViewModifier where Body == Never {
     public func body(content _: Content) -> Never {
         bodyError()
@@ -163,3 +140,28 @@ extension ViewModifier {
         preconditionFailure("body() should not be called on \(Self.self)")
     }
 }
+
+extension ViewModifier {
+    public static func _makeView(
+        modifier: _GraphValue<Self>,
+        inputs: _ViewInputs,
+        body: @escaping (_Graph, _ViewInputs) -> _ViewOutputs
+    ) -> _ViewOutputs {
+        makeView(modifier: modifier, inputs: inputs, body: body)
+    }
+
+    public static func _makeViewList(
+        modifier: _GraphValue<Self>,
+        inputs: _ViewListInputs,
+        body: @escaping (_Graph, _ViewListInputs) -> _ViewListOutputs
+    ) -> _ViewListOutputs {
+        makeViewList(modifier: modifier, inputs: inputs, body: body)
+    }
+
+    public static func _viewListCount(
+        inputs: _ViewListCountInputs,
+        body: (_ViewListCountInputs) -> Int?
+    ) -> Int? {
+        viewListCount(inputs: inputs, body: body)
+    }
+}