Use Swift 5.7 nightly on CI, fix build issues (#507)

* Use Swift 5.7 nightly on CI to fix build issues

* Update SwiftWasm snapshots

* Remove initializers that became ambiguous in 5.7

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
       matrix:
         include:
           - { toolchain: wasm-5.6.0-RELEASE }
-          - { toolchain: wasm-5.7-SNAPSHOT-2022-06-01-a }
-          - { toolchain: wasm-DEVELOPMENT-SNAPSHOT-2022-06-23-a }
+          - { toolchain: wasm-5.7-SNAPSHOT-2022-07-27-a }
+          - { toolchain: wasm-DEVELOPMENT-SNAPSHOT-2022-07-23-a }
 
     steps:
       - uses: actions/checkout@v2
@@ -85,7 +85,7 @@ jobs:
         shell: bash
         run: |
           set -ex
-          sudo xcode-select --switch /Applications/Xcode_13.4.app/Contents/Developer/
+          sudo xcode-select --switch /Applications/Xcode_13.4.1.app/Contents/Developer/
 
           brew install gtk+3
 
@@ -94,7 +94,7 @@ jobs:
   gtk_ubuntu_18_04_build:
     runs-on: ubuntu-latest
     container:
-      image: swiftlang/swift:nightly-bionic
+      image: swiftlang/swift:nightly-5.7-bionic
 
     steps:
       - uses: actions/checkout@v2
@@ -109,7 +109,7 @@ jobs:
   gtk_ubuntu_20_04_build:
     runs-on: ubuntu-latest
     container:
-      image: swiftlang/swift:nightly-focal
+      image: swiftlang/swift:nightly-5.7-focal
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/codecov.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   codecov:
     container:
-      image: swiftlang/swift:nightly-focal
+      image: swiftlang/swift:nightly-5.7-focal
     runs-on: ubuntu-latest
     steps:
       - run: apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y gtk+-3.0 libgtk+-3.0

Sources/TokamakCore/Fiber/Layout/StackLayout.swift

@@ -261,30 +261,8 @@ extension VStack: StackLayout {
   public var _alignment: Alignment { .init(horizontal: alignment, vertical: .center) }
 }
 
-public extension VStack where Content == EmptyView {
-  init(
-    alignment: HorizontalAlignment = .center,
-    spacing: CGFloat? = nil
-  ) {
-    self.alignment = alignment
-    self.spacing = spacing
-    content = EmptyView()
-  }
-}
-
 @_spi(TokamakCore)
 extension HStack: StackLayout {
   public static var orientation: Axis { .horizontal }
   public var _alignment: Alignment { .init(horizontal: .center, vertical: alignment) }
 }
-
-public extension HStack where Content == EmptyView {
-  init(
-    alignment: VerticalAlignment = .center,
-    spacing: CGFloat? = nil
-  ) {
-    self.alignment = alignment
-    self.spacing = spacing
-    content = EmptyView()
-  }
-}

Sources/TokamakCore/Views/Containers/List/List.swift

@@ -39,8 +39,7 @@ public struct List<SelectionValue, Content>: View
     self.content = content()
   }
 
-  var listStack: some View {
-    VStack(alignment: .leading, spacing: 0) { () -> AnyView in
+  func stackContent() -> AnyView {
     if let contentContainer = content as? ParentView {
       var sections = [AnyView]()
       var currentSection = [AnyView]()
@@ -77,6 +76,9 @@ public struct List<SelectionValue, Content>: View
       return AnyView(content)
     }
   }
+
+  var listStack: some View {
+    VStack(alignment: .leading, spacing: 0, content: stackContent)
   }
 
   @_spi(TokamakCore)