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Merged
couchdeveloper merged 1 commit into from
Jun 5, 2026
Merged

feat: Refine transducer task execution semantics and update examples #19

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30 changes: 16 additions & 14 deletions Examples/EffectViewExample/EffectViewExample.xcodeproj/project.pbxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
objects = {

/* Begin PBXBuildFile section */
A139516F2FAC867A00859397 /* EffectView in Frameworks */ = {isa = PBXBuildFile; productRef = A139516E2FAC867A00859397 /* EffectView */; };
A1C326A62FD21F7C00393BD8 /* EffectComponents in Frameworks */ = {isa = PBXBuildFile; productRef = A1C326A52FD21F7C00393BD8 /* EffectComponents */; };
/* End PBXBuildFile section */

/* Begin PBXContainerItemProxy section */
Expand Down Expand Up @@ -46,7 +46,7 @@
isa = PBXFrameworksBuildPhase;
buildActionMask = 2147483647;
files = (
A139516F2FAC867A00859397 /* EffectView in Frameworks */,
A1C326A62FD21F7C00393BD8 /* EffectComponents in Frameworks */,
);
runOnlyForDeploymentPostprocessing = 0;
};
Expand Down Expand Up @@ -113,7 +113,7 @@
);
name = EffectViewExample;
packageProductDependencies = (
A139516E2FAC867A00859397 /* EffectView */,
A1C326A52FD21F7C00393BD8 /* EffectComponents */,
);
productName = SimpleEffectView;
productReference = A13E260F2FA6014E00C324E5 /* EffectViewExample.app */;
Expand Down Expand Up @@ -192,7 +192,7 @@
mainGroup = A13E26062FA6014E00C324E5;
minimizedProjectReferenceProxies = 1;
packageReferences = (
A139516D2FAC867A00859397 /* XCLocalSwiftPackageReference "../../../EffectView" */,
A1C326A42FD21F7C00393BD8 /* XCLocalSwiftPackageReference "../../../EffectComponents" */,
);
preferredProjectObjectVersion = 77;
productRefGroup = A13E26102FA6014E00C324E5 /* Products */;
Expand Down Expand Up @@ -321,7 +321,7 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.4;
IPHONEOS_DEPLOYMENT_TARGET = 18.6;
LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
MTL_FAST_MATH = YES;
Expand Down Expand Up @@ -381,7 +381,7 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.4;
IPHONEOS_DEPLOYMENT_TARGET = 18.6;
LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
MTL_ENABLE_DEBUG_INFO = NO;
MTL_FAST_MATH = YES;
Expand All @@ -408,7 +408,7 @@
INFOPLIST_KEY_UILaunchScreen_Generation = YES;
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
IPHONEOS_DEPLOYMENT_TARGET = 15.6;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
LD_RUNPATH_SEARCH_PATHS = (
"$(inherited)",
"@executable_path/Frameworks",
Expand Down Expand Up @@ -440,7 +440,7 @@
INFOPLIST_KEY_UILaunchScreen_Generation = YES;
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
IPHONEOS_DEPLOYMENT_TARGET = 15.6;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
LD_RUNPATH_SEARCH_PATHS = (
"$(inherited)",
"@executable_path/Frameworks",
Expand All @@ -465,7 +465,7 @@
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = JQD365KZ66;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.4;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.andreas.grosam.home.SimpleEffectViewTests;
PRODUCT_NAME = "$(TARGET_NAME)";
Expand All @@ -486,7 +486,7 @@
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = JQD365KZ66;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.4;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.andreas.grosam.home.SimpleEffectViewTests;
PRODUCT_NAME = "$(TARGET_NAME)";
Expand All @@ -506,6 +506,7 @@
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = JQD365KZ66;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.andreas.grosam.home.SimpleEffectViewUITests;
PRODUCT_NAME = "$(TARGET_NAME)";
Expand All @@ -525,6 +526,7 @@
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = JQD365KZ66;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 26.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.andreas.grosam.home.SimpleEffectViewUITests;
PRODUCT_NAME = "$(TARGET_NAME)";
Expand Down Expand Up @@ -579,16 +581,16 @@
/* End XCConfigurationList section */

/* Begin XCLocalSwiftPackageReference section */
A139516D2FAC867A00859397 /* XCLocalSwiftPackageReference "../../../EffectView" */ = {
A1C326A42FD21F7C00393BD8 /* XCLocalSwiftPackageReference "../../../EffectComponents" */ = {
isa = XCLocalSwiftPackageReference;
relativePath = ../../../EffectView;
relativePath = ../../../EffectComponents;
};
/* End XCLocalSwiftPackageReference section */

/* Begin XCSwiftPackageProductDependency section */
A139516E2FAC867A00859397 /* EffectView */ = {
A1C326A52FD21F7C00393BD8 /* EffectComponents */ = {
isa = XCSwiftPackageProductDependency;
productName = EffectView;
productName = EffectComponents;
};
/* End XCSwiftPackageProductDependency section */
};
Expand Down
2 changes: 1 addition & 1 deletion ...ple/EffectViewExample.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
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14 changes: 8 additions & 6 deletions Examples/EffectViewExample/EffectViewExample/Counter.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ extension EnvironmentValues {
}

// MARK: - Transducer
extension Counter.Transducer: EffectView::Transducer {
extension Counter.Transducer: Transducer {

struct State {
var counter = 0
Expand All @@ -40,12 +40,12 @@ extension Counter.Transducer: EffectView::Transducer {
switch event {
case .start:
state.counter = 0
return run(id: "Counter") { input, env in
return task(id: "Counter") { input, env in
while true {
do {
try await Task.sleep(nanoseconds: 1_000_000_000) // 1 sec
print("tick")
input(.tick)
try? input(.tick)
} catch {} // most likely, the counter task has been cancelled; ignore it.
}
}
Expand All @@ -61,6 +61,7 @@ extension Counter.Transducer: EffectView::Transducer {
// MARK: - Views
extension Counter.Views {

@MainActor
struct ContentView: View {
var body: some View {
EnvReader(\.counterViewEnv) {
Expand All @@ -69,6 +70,7 @@ extension Counter.Views {
}
}

@MainActor
struct CounterView: View {
typealias Transducer = Counter.Transducer
typealias Env = Transducer.Env
Expand All @@ -82,12 +84,12 @@ extension Counter.Views {
of: Transducer.self,
state: $state,
initialEnv: env,
) { state, send in
) { state, input in
VStack {
Text("\(state.counter)")
.font(Font.largeTitle.monospacedDigit())
Button("Start") { send(.start) }
Button("Stop") { send(.stop) }
Button("Start") { try? input(.start) }
Button("Stop") { try? input(.stop) }
}
}
.id(env.id) // restart the EffectView when the env changes
Expand Down
14 changes: 7 additions & 7 deletions Examples/EffectViewExample/EffectViewExample/Movies.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -133,24 +133,24 @@ extension Movies.Transducer: Transducer {


static func loadMovies() -> Effect {
run(id: "load") { input, env in
task(id: "load") { input, env in
do {
let movies = try await env.movieFetch()
input(.loaded(movies))
try input(.loaded(movies))
} catch {
input(.loadFailed(error))
try input(.loadFailed(error))
}
}
}

static func refreshMovies() -> Effect {
// Note: a refresh action
run(id: "refresh") { input, env in
task(id: "refresh") { input, env in
do {
let movies = try await env.movieFetch()
input(.loaded(movies))
try input(.loaded(movies))
} catch {
input(.loadFailed(error))
try input(.loadFailed(error))
}
}
}
Expand Down Expand Up @@ -215,7 +215,7 @@ extension Movies.Views {
isPresented: .constant(state.error != nil),
presenting: state.error
) { _ in
Button("OK") { input(.dismiss) }
Button("OK") { try? input(.dismiss) }
} message: { error in
Text(error.localizedDescription)
}
Expand Down
16 changes: 9 additions & 7 deletions Examples/EffectViewExample/EffectViewExample/RemoteCounter.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,8 @@ extension RemoteCounter {
/// Private state, a public read-only projection, and an event-driven mutation API.
/// Observers must use `withObservationTracking` (or wrap it) — the store itself
/// does not publish a stream.
@Observable @MainActor
@Observable
@MainActor
final class CounterStore: Sendable {

static let shared: CounterStore = .init()
Expand Down Expand Up @@ -91,19 +92,19 @@ extension RemoteCounter.Transducer: Transducer {

case .incrementTapped:
print("incrementTapped")
return run { input, env in
return task { input, env in
await env.store.send(.increment)
}

case .decrementTapped:
print("decrementTapped")
return run { _, env in
return task { _, env in
await env.store.send(.decrement)
}

case .resetTapped:
print("resetTapped")
return run { _, env in
return task { _, env in
await env.store.send(.reset)
}
}
Expand Down Expand Up @@ -146,9 +147,9 @@ extension RemoteCounter.Views {
Text(deltaLabel(state.lastDelta))
.foregroundStyle(.secondary)
HStack(spacing: 24) {
Button("−") { send(.decrementTapped) }
Button("+") { send(.incrementTapped) }
Button("Reset") { send(.resetTapped) }
Button("−") { try? send(.decrementTapped) }
Button("+") { try? send(.incrementTapped) }
Button("Reset") { try? send(.resetTapped) }
}
.buttonStyle(.bordered)
}
Expand All @@ -174,3 +175,4 @@ extension RemoteCounter.Views {
Text("RemoteCounter not available on this OS version")
}
}

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