Add .defaultValue and .isDefaultValue to @Default (sindresorhus#76

)
dezinezync · Dec 17, 2022 · 9691a7c · 9691a7c
1 parent 6557be8
commit 9691a7c
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/Sources/Defaults/SwiftUI.swift b/Sources/Defaults/SwiftUI.swift
@@ -87,6 +87,9 @@ public struct Default<Value: Defaults.Serializable>: DynamicProperty {
 
  public var projectedValue: Binding<Value> { $observable.value }
 
+ /// The default value of the key.
+ public var defaultValue: Value { key.defaultValue }
+
  /// Combine publisher that publishes values when the `Defaults` item changes.
  public var publisher: Publisher { Defaults.publisher(key) }
 
@@ -118,6 +121,12 @@ public struct Default<Value: Defaults.Serializable>: DynamicProperty {
  }
 }
 
+@available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
+extension Default where Value: Equatable {
+ /// Indicates whether the value is the same as the default value.
+ public var isDefaultValue: Bool { wrappedValue == defaultValue }
+}
+
 @available(macOS 11, iOS 14, tvOS 14, watchOS 7, *)
 extension Defaults {
  /**

diff --git a/Tests/DefaultsTests/DefaultsSwiftUITests.swift b/Tests/DefaultsTests/DefaultsSwiftUITests.swift
@@ -44,5 +44,7 @@ final class DefaultsSwiftUITests: XCTestCase {
  XCTAssertTrue(view.hasUnicorn)
  XCTAssertEqual(view.user.username, "Chen")
  XCTAssertEqual(view.setInt, Set(1...4))
+ XCTAssertFalse(Default(.hasUnicorn).defaultValue)
+ XCTAssertFalse(Default(.hasUnicorn).isDefaultValue)
  }
 }