This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.

The Swift Package Index logo.Swift Package Index

Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build DateGrid with Swift 6.0 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/yodagamaheshan/DateGrid.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/yodagamaheshan/DateGrid
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 2b0665b code formatted
Cloned https://github.com/yodagamaheshan/DateGrid.git
Revision (git rev-parse @):
2b0665b6bb5b1408b74d0d9acc406f300483cf7c
SUCCESS checkout https://github.com/yodagamaheshan/DateGrid.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/yodagamaheshan/DateGrid.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/12] Compiling DateGrid DateGridDate.swift
[4/12] Compiling DateGrid DateFormatter+dateFormats.swift
[5/13] Compiling DateGrid Date+dateFormat.swift
[6/13] Compiling DateGrid Calendar+genarageDates.swift
[7/13] Compiling DateGrid CalenderModes.swift
[8/13] Compiling DateGrid DateGrid.swift
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:19:24: error: 'Binding' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 15 |     ///   - selectedMonth: date relevant to showing month, then you can extract the components
 16 |     ///   - content:
 17 |     public init(
    |            `- note: add @available attribute to enclosing initializer
 18 |         interval: DateInterval,
 19 |         selectedMonth: Binding<Date>,
    |                        `- error: 'Binding' is only available in macOS 10.15 or newer
 20 |         mode: CalendarMode,
 21 |         @ViewBuilder content: @escaping (DateGridDate) -> DateView
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:21:10: error: 'ViewBuilder' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 15 |     ///   - selectedMonth: date relevant to showing month, then you can extract the components
 16 |     ///   - content:
 17 |     public init(
    |            `- note: add @available attribute to enclosing initializer
 18 |         interval: DateInterval,
 19 |         selectedMonth: Binding<Date>,
 20 |         mode: CalendarMode,
 21 |         @ViewBuilder content: @escaping (DateGridDate) -> DateView
    |          `- error: 'ViewBuilder' is only available in macOS 10.15 or newer
 22 |     ) {
 23 |         self.viewModel = .init(interval: interval, mode: mode)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:31:6: error: 'Binding' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 29 |     private let viewModel: DateGridViewModel
 30 |     private let content: (DateGridDate) -> DateView
 31 |     @Binding var selectedMonth: Date
    |      `- error: 'Binding' is only available in macOS 10.15 or newer
 32 |
 33 |     public var body: some View {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:33:27: error: 'View' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                |          `- error: 'View' is only available in macOS 10.15 or newer
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:10:56: error: 'View' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               |                                        `- error: 'View' is only available in macOS 10.15 or newer
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:48:6: error: 'State' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
    |      `- error: 'State' is only available in macOS 10.15 or newer
 49 |
 50 |     static var previews: some View {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:50:31: error: 'View' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                |              `- error: 'View' is only available in macOS 10.15 or newer
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
 52 |             Text(selectedMonthDate.description)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:76:20: error: 'View' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         |          `- error: 'View' is only available in macOS 10.15 or newer
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:72:54: error: 'View' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        |                                             `- error: 'View' is only available in macOS 10.15 or newer
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:35:9: error: 'TabView' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
    |         |- error: 'TabView' is only available in macOS 10.15 or newer
    |         `- note: add 'if #available' version check
 36 |
 37 |             MonthsOrWeeks(viewModel: viewModel, content: content)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:39:10: error: 'frame(width:height:alignment:)' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
    :
 37 |             MonthsOrWeeks(viewModel: viewModel, content: content)
 38 |         }
 39 |         .frame(height: viewModel.mode.estimateHeight, alignment: .center)
    |          |- error: 'frame(width:height:alignment:)' is only available in macOS 10.15 or newer
    |          `- note: add 'if #available' version check
 40 |         .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
 41 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:39:67: error: 'center' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
    :
 37 |             MonthsOrWeeks(viewModel: viewModel, content: content)
 38 |         }
 39 |         .frame(height: viewModel.mode.estimateHeight, alignment: .center)
    |                                                                   |- error: 'center' is only available in macOS 10.15 or newer
    |                                                                   `- note: add 'if #available' version check
 40 |         .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
 41 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:40:10: error: 'tabViewStyle' is only available in macOS 11.0 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
    :
 38 |         }
 39 |         .frame(height: viewModel.mode.estimateHeight, alignment: .center)
 40 |         .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
    |          |- error: 'tabViewStyle' is only available in macOS 11.0 or newer
    |          `- note: add 'if #available' version check
 41 |     }
 42 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:40:23: error: 'PageTabViewStyle' is unavailable in macOS
 38 |         }
 39 |         .frame(height: viewModel.mode.estimateHeight, alignment: .center)
 40 |         .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
    |                       `- error: 'PageTabViewStyle' is unavailable in macOS
 41 |     }
 42 |
SwiftUI.PageTabViewStyle:3:15: note: 'PageTabViewStyle' has been explicitly marked unavailable here
 1 | @available(iOS 14.0, tvOS 14.0, watchOS 7.0, *)
 2 | @available(macOS, unavailable)
 3 | public struct PageTabViewStyle : TabViewStyle {
   |               `- note: 'PageTabViewStyle' has been explicitly marked unavailable here
 4 |     public struct IndexDisplayMode : Sendable {
 5 |         public static let automatic: PageTabViewStyle.IndexDisplayMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:51:9: error: 'VStack' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
    |         |- error: 'VStack' is only available in macOS 10.15 or newer
    |         `- note: add 'if #available' version check
 52 |             Text(selectedMonthDate.description)
 53 |             WeekDaySymbols()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:52:13: warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
 52 |             Text(selectedMonthDate.description)
    |             |- warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |             `- note: add 'if #available' version check
 53 |             WeekDaySymbols()
 54 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:52:13: error: 'Text' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
 52 |             Text(selectedMonthDate.description)
    |             |- error: 'Text' is only available in macOS 10.15 or newer
    |             `- note: add 'if #available' version check
 53 |             WeekDaySymbols()
 54 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:51:16: warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
    |                |- warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                `- note: add 'if #available' version check
 52 |             Text(selectedMonthDate.description)
 53 |             WeekDaySymbols()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:17:20: error: 'calendar' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
   :
15 |     }
16 |
17 |     @Environment(\.calendar) var calendar
   |                    `- error: 'calendar' is only available in macOS 10.15 or newer
18 |     let interval: DateInterval
19 |     var mode: CalendarMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:77:9: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
    |         |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |         `- note: add 'if #available' version check
 78 |
 79 |             VStack {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:77:9: error: 'ForEach' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
    |         |- error: 'ForEach' is only available in macOS 10.15 or newer
    |         `- note: add 'if #available' version check
 78 |
 79 |             VStack {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:77:9: error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
    |         |- error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
    |         `- note: add 'if #available' version check
 78 |
 79 |             VStack {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:77:54: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
    |                                                      |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                                                      `- note: add 'if #available' version check
 78 |
 79 |             VStack {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:79:13: error: 'VStack' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
    |             |- error: 'VStack' is only available in macOS 10.15 or newer
    |             `- note: add 'if #available' version check
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:79:20: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
    |                    |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                    `- note: add 'if #available' version check
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:81:17: error: 'LazyVGrid' is only available in macOS 11.0 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
    |                 |- error: 'LazyVGrid' is only available in macOS 11.0 or newer
    |                 `- note: add 'if #available' version check
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:81:17: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
    |                 |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                 `- note: add 'if #available' version check
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:81:53: error: 'GridItem' is only available in macOS 11.0 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
    |                                                     |- error: 'GridItem' is only available in macOS 11.0 or newer
    |                                                     `- note: add 'if #available' version check
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:83:21: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
    |                     |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                     `- note: add 'if #available' version check
 84 |
 85 |                         let dateGridDate = DateGridDate(date: date, currentMonth: monthOrWeek)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:83:21: error: 'ForEach' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
    |                     |- error: 'ForEach' is only available in macOS 10.15 or newer
    |                     `- note: add 'if #available' version check
 84 |
 85 |                         let dateGridDate = DateGridDate(date: date, currentMonth: monthOrWeek)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:83:21: error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
    |                     |- error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
    |                     `- note: add 'if #available' version check
 84 |
 85 |                         let dateGridDate = DateGridDate(date: date, currentMonth: monthOrWeek)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:88:34: error: 'id' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 86 |                         if viewModel.calendar.isDate(date, equalTo: monthOrWeek, toGranularity: .month) {
 87 |                             content(dateGridDate)
 88 |                                 .id(date)
    |                                  |- error: 'id' is only available in macOS 10.15 or newer
    |                                  `- note: add 'if #available' version check
 89 |
 90 |                         } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:86:105: error: 'buildEither(first:)' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 84 |
 85 |                         let dateGridDate = DateGridDate(date: date, currentMonth: monthOrWeek)
 86 |                         if viewModel.calendar.isDate(date, equalTo: monthOrWeek, toGranularity: .month) {
    |                                                                                                         |- error: 'buildEither(first:)' is only available in macOS 10.15 or newer
    |                                                                                                         `- note: add 'if #available' version check
 87 |                             content(dateGridDate)
 88 |                                 .id(date)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:92:34: error: 'hidden()' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 90 |                         } else {
 91 |                             content(dateGridDate)
 92 |                                 .hidden()
    |                                  |- error: 'hidden()' is only available in macOS 10.15 or newer
    |                                  `- note: add 'if #available' version check
 93 |                         }
 94 |                     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:90:32: error: 'buildEither(second:)' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 88 |                                 .id(date)
 89 |
 90 |                         } else {
    |                                |- error: 'buildEither(second:)' is only available in macOS 10.15 or newer
    |                                `- note: add 'if #available' version check
 91 |                             content(dateGridDate)
 92 |                                 .hidden()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:83:75: warning: conformance of '_ConditionalContent<TrueContent, FalseContent>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
    |                                                                           |- warning: conformance of '_ConditionalContent<TrueContent, FalseContent>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                                                                           `- note: add 'if #available' version check
 84 |
 85 |                         let dateGridDate = DateGridDate(date: date, currentMonth: monthOrWeek)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:81:117: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
    |                                                                                                                     |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                                                                                                                     `- note: add 'if #available' version check
 82 |
 83 |                     ForEach(viewModel.days(for: monthOrWeek), id: \.self) { date in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:96:18: error: 'tag' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 94 |                     }
 95 |                 }
 96 |                 .tag(monthOrWeek)
    |                  |- error: 'tag' is only available in macOS 10.15 or newer
    |                  `- note: add 'if #available' version check
 97 |                 //Tab view frame alignment to .Top didn't work dtz y
 98 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:98:17: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 96 |                 .tag(monthOrWeek)
 97 |                 //Tab view frame alignment to .Top didn't work dtz y
 98 |                 Spacer()
    |                 |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                 `- note: add 'if #available' version check
 99 |             }
100 |         }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:98:17: error: 'Spacer' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
    :
 96 |                 .tag(monthOrWeek)
 97 |                 //Tab view frame alignment to .Top didn't work dtz y
 98 |                 Spacer()
    |                 |- error: 'Spacer' is only available in macOS 10.15 or newer
    |                 `- note: add 'if #available' version check
 99 |             }
100 |         }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:79:20: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
 79 |             VStack {
    |                    |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |                    `- note: add 'if #available' version check
 80 |
 81 |                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: numberOfDaysInAWeek), spacing: 0) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:76:25: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         |               |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
    |         |               `- note: add 'if #available' version check
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
[9/13] Compiling DateGrid DateGridViewModel.swift
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:17:20: error: 'calendar' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
   :
15 |     }
16 |
17 |     @Environment(\.calendar) var calendar
   |                    `- error: 'calendar' is only available in macOS 10.15 or newer
18 |     let interval: DateInterval
19 |     var mode: CalendarMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:17:6: error: 'Environment' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
   :
15 |     }
16 |
17 |     @Environment(\.calendar) var calendar
   |      `- error: 'Environment' is only available in macOS 10.15 or newer
18 |     let interval: DateInterval
19 |     var mode: CalendarMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:10:26: error: 'ObservableObject' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       |                  `- error: 'ObservableObject' is only available in macOS 10.15 or newer
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[10/13] Emitting module DateGrid
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:16:6: error: 'State' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
14 |     }
15 |
16 |     @State private var isShown = false
   |      `- error: 'State' is only available in macOS 10.15 or newer
17 |     private let date: Date
18 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:19:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:42:31: error: 'View' is only available in macOS 10.15 or newer
39 | }
40 |
41 | struct DateCell1_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
42 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
43 |         DateCell1(date: Date())
44 |             .background(Color.red)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:16:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:26:31: error: 'View' is only available in macOS 10.15 or newer
23 | }
24 |
25 | struct NormalDayCell_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
26 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
27 |         NormalDayCell(date: Date())
28 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:19:24: error: 'Binding' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 15 |     ///   - selectedMonth: date relevant to showing month, then you can extract the components
 16 |     ///   - content:
 17 |     public init(
    |            `- note: add @available attribute to enclosing initializer
 18 |         interval: DateInterval,
 19 |         selectedMonth: Binding<Date>,
    |                        `- error: 'Binding' is only available in macOS 10.15 or newer
 20 |         mode: CalendarMode,
 21 |         @ViewBuilder content: @escaping (DateGridDate) -> DateView
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:21:10: error: 'ViewBuilder' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 15 |     ///   - selectedMonth: date relevant to showing month, then you can extract the components
 16 |     ///   - content:
 17 |     public init(
    |            `- note: add @available attribute to enclosing initializer
 18 |         interval: DateInterval,
 19 |         selectedMonth: Binding<Date>,
 20 |         mode: CalendarMode,
 21 |         @ViewBuilder content: @escaping (DateGridDate) -> DateView
    |          `- error: 'ViewBuilder' is only available in macOS 10.15 or newer
 22 |     ) {
 23 |         self.viewModel = .init(interval: interval, mode: mode)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:31:6: error: 'Binding' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 29 |     private let viewModel: DateGridViewModel
 30 |     private let content: (DateGridDate) -> DateView
 31 |     @Binding var selectedMonth: Date
    |      `- error: 'Binding' is only available in macOS 10.15 or newer
 32 |
 33 |     public var body: some View {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:33:27: error: 'View' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
    :
 31 |     @Binding var selectedMonth: Date
 32 |
 33 |     public var body: some View {
    |                |          `- error: 'View' is only available in macOS 10.15 or newer
    |                `- note: add @available attribute to enclosing property
 34 |
 35 |         TabView(selection: $selectedMonth) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:10:56: error: 'View' is only available in macOS 10.15 or newer
  8 | import SwiftUI
  9 |
 10 | public struct DateGrid<DateView>: View where DateView: View {
    |               |                                        `- error: 'View' is only available in macOS 10.15 or newer
    |               `- note: add @available attribute to enclosing generic struct
 11 |
 12 |     /// DateStack view
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:48:6: error: 'State' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
    |      `- error: 'State' is only available in macOS 10.15 or newer
 49 |
 50 |     static var previews: some View {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:50:31: error: 'View' is only available in macOS 10.15 or newer
 44 | }
 45 |
 46 | struct CalendarView_Previews: PreviewProvider {
    |        `- note: add @available attribute to enclosing struct
 47 |
 48 |     @State static var selectedMonthDate = Date()
 49 |
 50 |     static var previews: some View {
    |                |              `- error: 'View' is only available in macOS 10.15 or newer
    |                `- note: add @available attribute to enclosing static property
 51 |         VStack {
 52 |             Text(selectedMonthDate.description)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:76:20: error: 'View' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
 75 |
 76 |     var body: some View {
    |         |          `- error: 'View' is only available in macOS 10.15 or newer
    |         `- note: add @available attribute to enclosing property
 77 |         ForEach(viewModel.monthsOrWeeks, id: \.self) { monthOrWeek in
 78 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGrid.swift:72:54: error: 'View' is only available in macOS 10.15 or newer
 70 | }
 71 |
 72 | struct MonthsOrWeeks<DateView>: View where DateView: View {
    |        |                                             `- error: 'View' is only available in macOS 10.15 or newer
    |        `- note: add @available attribute to enclosing generic struct
 73 |     let viewModel: DateGridViewModel
 74 |     let content: (DateGridDate) -> DateView
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:17:20: error: 'calendar' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
   :
15 |     }
16 |
17 |     @Environment(\.calendar) var calendar
   |                    `- error: 'calendar' is only available in macOS 10.15 or newer
18 |     let interval: DateInterval
19 |     var mode: CalendarMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:17:6: error: 'Environment' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
   :
15 |     }
16 |
17 |     @Environment(\.calendar) var calendar
   |      `- error: 'Environment' is only available in macOS 10.15 or newer
18 |     let interval: DateInterval
19 |     var mode: CalendarMode
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/DateGridViewModel.swift:10:26: error: 'ObservableObject' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | class DateGridViewModel: ObservableObject {
   |       |                  `- error: 'ObservableObject' is only available in macOS 10.15 or newer
   |       `- note: add @available attribute to enclosing class
11 |     //FIXME: change var names "mode"
12 |     init(interval: DateInterval, mode: CalendarMode) {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:14:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:28:31: error: 'View' is only available in macOS 10.15 or newer
25 | }
26 |
27 | struct WeekDaySymbols_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
28 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
29 |         WeekDaySymbols()
30 |     }
[11/13] Compiling DateGrid NormalDayCell.swift
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:16:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:26:31: error: 'View' is only available in macOS 10.15 or newer
23 | }
24 |
25 | struct NormalDayCell_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
26 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
27 |         NormalDayCell(date: Date())
28 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:17:9: error: 'Text' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
   |         |- error: 'Text' is only available in macOS 10.15 or newer
   |         `- note: add 'if #available' version check
18 |             .padding(8)
19 |             .background(Color.blue)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:18:14: error: 'padding' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
   |              |- error: 'padding' is only available in macOS 10.15 or newer
   |              `- note: add 'if #available' version check
19 |             .background(Color.blue)
20 |             .cornerRadius(8)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:19:14: error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
19 |             .background(Color.blue)
   |              |- error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
   |              `- note: add 'if #available' version check
20 |             .cornerRadius(8)
21 |             .padding([.bottom], 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:19:25: error: 'Color' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
19 |             .background(Color.blue)
   |                         |- error: 'Color' is only available in macOS 10.15 or newer
   |                         `- note: add 'if #available' version check
20 |             .cornerRadius(8)
21 |             .padding([.bottom], 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:19:31: error: 'blue' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
19 |             .background(Color.blue)
   |                               |- error: 'blue' is only available in macOS 10.15 or newer
   |                               `- note: add 'if #available' version check
20 |             .cornerRadius(8)
21 |             .padding([.bottom], 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:20:14: error: 'cornerRadius(_:antialiased:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
19 |             .background(Color.blue)
20 |             .cornerRadius(8)
   |              |- error: 'cornerRadius(_:antialiased:)' is only available in macOS 10.15 or newer
   |              `- note: add 'if #available' version check
21 |             .padding([.bottom], 10)
22 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/NormalDayCell.swift:21:14: error: 'padding' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct NormalDayCell: View {
   |               `- note: add @available attribute to enclosing struct
11 |     public init(date: Date) {
12 |         self.date = date
   :
14 |
15 |     private var date: Date
16 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
17 |         Text(date.day)
18 |             .padding(8)
19 |             .background(Color.blue)
20 |             .cornerRadius(8)
21 |             .padding([.bottom], 10)
   |              |- error: 'padding' is only available in macOS 10.15 or newer
   |              `- note: add 'if #available' version check
22 |     }
23 | }
[12/13] Compiling DateGrid DateCell1.swift
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:16:6: error: 'State' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
14 |     }
15 |
16 |     @State private var isShown = false
   |      `- error: 'State' is only available in macOS 10.15 or newer
17 |     private let date: Date
18 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:19:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:42:31: error: 'View' is only available in macOS 10.15 or newer
39 | }
40 |
41 | struct DateCell1_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
42 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
43 |         DateCell1(date: Date())
44 |             .background(Color.red)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:20:9: warning: conformance of 'Group<Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
   |         |- warning: conformance of 'Group<Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |         `- note: add 'if #available' version check
21 |             if isShown {
22 |                 Text(date.day)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:20:9: error: 'Group' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
   |         |- error: 'Group' is only available in macOS 10.15 or newer
   |         `- note: add 'if #available' version check
21 |             if isShown {
22 |                 Text(date.day)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:20:9: error: 'init(content:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
   |         |- error: 'init(content:)' is only available in macOS 10.15 or newer
   |         `- note: add 'if #available' version check
21 |             if isShown {
22 |                 Text(date.day)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:22:17: error: 'Text' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
22 |                 Text(date.day)
   |                 |- error: 'Text' is only available in macOS 10.15 or newer
   |                 `- note: add 'if #available' version check
23 |                     .padding(8)
24 |                     .background(Color.purple)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:23:22: error: 'padding' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
22 |                 Text(date.day)
23 |                     .padding(8)
   |                      |- error: 'padding' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
24 |                     .background(Color.purple)
25 |                     .cornerRadius(20)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:24:22: error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
22 |                 Text(date.day)
23 |                     .padding(8)
24 |                     .background(Color.purple)
   |                      |- error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
   |                      `- note: add 'if #available' version check
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:24:33: error: 'Color' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
22 |                 Text(date.day)
23 |                     .padding(8)
24 |                     .background(Color.purple)
   |                                 |- error: 'Color' is only available in macOS 10.15 or newer
   |                                 `- note: add 'if #available' version check
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:24:39: error: 'purple' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
22 |                 Text(date.day)
23 |                     .padding(8)
24 |                     .background(Color.purple)
   |                                       |- error: 'purple' is only available in macOS 10.15 or newer
   |                                       `- note: add 'if #available' version check
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:25:22: error: 'cornerRadius(_:antialiased:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
23 |                     .padding(8)
24 |                     .background(Color.purple)
25 |                     .cornerRadius(20)
   |                      |- error: 'cornerRadius(_:antialiased:)' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:26:22: error: 'padding' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
24 |                     .background(Color.purple)
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
   |                      |- error: 'padding' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
28 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:22: error: 'transition' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                      |- error: 'transition' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:33: error: 'AnyTransition' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                 |- error: 'AnyTransition' is only available in macOS 10.15 or newer
   |                                 `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:47: error: 'scale' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                               |- error: 'scale' is only available in macOS 10.15 or newer
   |                                               `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:53: error: 'animation' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                                     |- error: 'animation' is only available in macOS 10.15 or newer
   |                                                     `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:63: error: 'Animation' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                                               |- error: 'Animation' is only available in macOS 10.15 or newer
   |                                                               `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:73: error: 'spring(duration:bounce:blendDuration:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                                                         |- error: 'spring(duration:bounce:blendDuration:)' is only available in macOS 10.15 or newer
   |                                                                         `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:27:82: error: 'delay' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
25 |                     .cornerRadius(20)
26 |                     .padding(.bottom, 10)
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
   |                                                                                  |- error: 'delay' is only available in macOS 10.15 or newer
   |                                                                                  `- note: add 'if #available' version check
28 |
29 |             } else {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:21:24: error: 'buildEither(first:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   |                        |- error: 'buildEither(first:)' is only available in macOS 10.15 or newer
   |                        `- note: add 'if #available' version check
22 |                 Text(date.day)
23 |                     .padding(8)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:30:17: error: 'Text' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
28 |
29 |             } else {
30 |                 Text("")
   |                 |- error: 'Text' is only available in macOS 10.15 or newer
   |                 `- note: add 'if #available' version check
31 |                     .onAppear(perform: {
32 |                         withAnimation {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:31:22: error: 'onAppear(perform:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
29 |             } else {
30 |                 Text("")
31 |                     .onAppear(perform: {
   |                      |- error: 'onAppear(perform:)' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
32 |                         withAnimation {
33 |                             isShown = true
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:32:25: error: 'withAnimation' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
30 |                 Text("")
31 |                     .onAppear(perform: {
32 |                         withAnimation {
   |                         |- error: 'withAnimation' is only available in macOS 10.15 or newer
   |                         `- note: add 'if #available' version check
33 |                             isShown = true
34 |                         }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:33:29: error: setter for 'isShown' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
31 |                     .onAppear(perform: {
32 |                         withAnimation {
33 |                             isShown = true
   |                             |- error: setter for 'isShown' is only available in macOS 10.15 or newer
   |                             `- note: add 'if #available' version check
34 |                         }
35 |                     })
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:29:20: error: 'buildEither(second:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
   :
27 |                     .transition(AnyTransition.scale.animation(Animation.spring().delay(Double(date.day)!/30)))
28 |
29 |             } else {
   |                    |- error: 'buildEither(second:)' is only available in macOS 10.15 or newer
   |                    `- note: add 'if #available' version check
30 |                 Text("")
31 |                     .onAppear(perform: {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:20:15: warning: conformance of '_ConditionalContent<TrueContent, FalseContent>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
20 |         Group {
   |               |- warning: conformance of '_ConditionalContent<TrueContent, FalseContent>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |               `- note: add 'if #available' version check
21 |             if isShown {
22 |                 Text(date.day)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:19:32: warning: conformance of 'Group<Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct DateCell1: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init(date: Date) {
   :
17 |     private let date: Date
18 |
19 |     public var body: some View {
   |                |               |- warning: conformance of 'Group<Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                |               `- note: add 'if #available' version check
   |                `- note: add @available attribute to enclosing property
20 |         Group {
21 |             if isShown {
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:44:14: error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
39 | }
40 |
41 | struct DateCell1_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
42 |     static var previews: some View {
   |                `- note: add @available attribute to enclosing static property
43 |         DateCell1(date: Date())
44 |             .background(Color.red)
   |              |- error: 'background(_:ignoresSafeAreaEdges:)' is only available in macOS 12.0 or newer
   |              `- note: add 'if #available' version check
45 |     }
46 | }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:44:25: error: 'Color' is only available in macOS 10.15 or newer
39 | }
40 |
41 | struct DateCell1_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
42 |     static var previews: some View {
   |                `- note: add @available attribute to enclosing static property
43 |         DateCell1(date: Date())
44 |             .background(Color.red)
   |                         |- error: 'Color' is only available in macOS 10.15 or newer
   |                         `- note: add 'if #available' version check
45 |     }
46 | }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/Cell/DateCell1.swift:44:31: error: 'red' is only available in macOS 10.15 or newer
39 | }
40 |
41 | struct DateCell1_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
42 |     static var previews: some View {
   |                `- note: add @available attribute to enclosing static property
43 |         DateCell1(date: Date())
44 |             .background(Color.red)
   |                               |- error: 'red' is only available in macOS 10.15 or newer
   |                               `- note: add 'if #available' version check
45 |     }
46 | }
[13/13] Compiling DateGrid WeekDaySymbols.swift
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:14:27: error: 'View' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                |          `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:28:31: error: 'View' is only available in macOS 10.15 or newer
25 | }
26 |
27 | struct WeekDaySymbols_Previews: PreviewProvider {
   |        `- note: add @available attribute to enclosing struct
28 |     static var previews: some View {
   |                |              `- error: 'View' is only available in macOS 10.15 or newer
   |                `- note: add @available attribute to enclosing static property
29 |         WeekDaySymbols()
30 |     }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:15:9: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
   |         |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |         `- note: add 'if #available' version check
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:15:9: error: 'HStack' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
   |         |- error: 'HStack' is only available in macOS 10.15 or newer
   |         `- note: add 'if #available' version check
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:15:9: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
   |         |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |         `- note: add 'if #available' version check
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:13: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |             |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |             `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:13: error: 'ForEach' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |             |- error: 'ForEach' is only available in macOS 10.15 or newer
   |             `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:13: error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |             |- error: 'init(_:id:content:)' is only available in macOS 10.15 or newer
   |             `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:17:17: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
   |                 |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                 `- note: add 'if #available' version check
18 |                 Text(item)
19 |                     .bold()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:17:17: error: 'Spacer' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
   |                 |- error: 'Spacer' is only available in macOS 10.15 or newer
   |                 `- note: add 'if #available' version check
18 |                 Text(item)
19 |                     .bold()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:18:17: warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
18 |                 Text(item)
   |                 |- warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                 `- note: add 'if #available' version check
19 |                     .bold()
20 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:18:17: error: 'Text' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
18 |                 Text(item)
   |                 |- error: 'Text' is only available in macOS 10.15 or newer
   |                 `- note: add 'if #available' version check
19 |                     .bold()
20 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:19:22: error: 'bold()' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
18 |                 Text(item)
19 |                     .bold()
   |                      |- error: 'bold()' is only available in macOS 10.15 or newer
   |                      `- note: add 'if #available' version check
20 |                 Spacer()
21 |
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:20:17: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   :
18 |                 Text(item)
19 |                     .bold()
20 |                 Spacer()
   |                 |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                 `- note: add 'if #available' version check
21 |
22 |             }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:20:17: error: 'Spacer' is only available in macOS 10.15 or newer
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   :
18 |                 Text(item)
19 |                     .bold()
20 |                 Spacer()
   |                 |- error: 'Spacer' is only available in macOS 10.15 or newer
   |                 `- note: add 'if #available' version check
21 |
22 |             }
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:75: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |                                                                           |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                                                                           `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:75: warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |                                                                           |- warning: conformance of 'Text' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                                                                           `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:16:75: warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
   |                                                                           |- warning: conformance of 'Spacer' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                                                                           `- note: add 'if #available' version check
17 |                 Spacer()
18 |                 Text(item)
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:15:16: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
   |                |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                `- note: add 'if #available' version check
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
17 |                 Spacer()
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:14:32: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                |               |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                |               `- note: add 'if #available' version check
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
/Users/admin/builder/spi-builder-workspace/Sources/DateGrid/WeekDaySymbols/WeekDaySymbols.swift:14:32: warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct WeekDaySymbols: View {
   |               `- note: add @available attribute to enclosing struct
11 |
12 |     public init() {}
13 |
14 |     public var body: some View {
   |                |               |- warning: conformance of 'ForEach<Data, ID, Content>' to 'View' is only available in macOS 10.15 or newer; this is an error in the Swift 6 language mode
   |                |               `- note: add 'if #available' version check
   |                `- note: add @available attribute to enclosing property
15 |         HStack {
16 |             ForEach(Calendar.current.veryShortWeekdaySymbols, id: \.self) { item in
BUILD FAILURE 6.0 macosSpm
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.