From c733c9d9084fd9dff9fc15a751ec93d465178820 Mon Sep 17 00:00:00 2001
From: mogemimi <mogemimi@enginetrouble.net>
Date: Wed, 16 Dec 2020 06:09:39 +0900
Subject: [PATCH] Replace shared_ptr<Error> with unique_ptr<Error> in examples

---
 examples/FeatureShowcase/Platform.Cocoa/AppDelegate.mm      | 2 +-
 examples/FeatureShowcase/Platform.Win32/main.cpp            | 2 +-
 examples/FeatureShowcase/Platform.X11/main.cpp              | 2 +-
 .../Source/AnimationGraphTest/AnimationGraphTest.cpp        | 4 ++--
 .../Source/AnimationGraphTest/AnimationGraphTest.hpp        | 2 +-
 .../FeatureShowcase/Source/AudioClipTest/AudioClipTest.cpp  | 4 ++--
 .../FeatureShowcase/Source/AudioClipTest/AudioClipTest.hpp  | 2 +-
 .../Source/BasicEffectTest/BasicEffectTest.cpp              | 4 ++--
 .../Source/BasicEffectTest/BasicEffectTest.hpp              | 2 +-
 examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.cpp   | 4 ++--
 examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.hpp   | 2 +-
 .../Source/BillboardBatchTest/BillboardBatchTest.cpp        | 4 ++--
 .../Source/BillboardBatchTest/BillboardBatchTest.hpp        | 2 +-
 .../Source/DistanceFieldFontTest/DistanceFieldFontTest.cpp  | 4 ++--
 .../Source/DistanceFieldFontTest/DistanceFieldFontTest.hpp  | 2 +-
 .../FeatureShowcase/Source/EditorGUITest/EditorGUITest.cpp  | 4 ++--
 .../FeatureShowcase/Source/EditorGUITest/EditorGUITest.hpp  | 2 +-
 examples/FeatureShowcase/Source/FeatureShowcaseGame.cpp     | 2 +-
 examples/FeatureShowcase/Source/FeatureShowcaseGame.hpp     | 2 +-
 .../FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.cpp  | 4 ++--
 .../FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.hpp  | 2 +-
 .../FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.cpp  | 4 ++--
 .../FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.hpp  | 2 +-
 .../Source/GUISplitterTest/GUISplitterTest.cpp              | 4 ++--
 .../Source/GUISplitterTest/GUISplitterTest.hpp              | 2 +-
 examples/FeatureShowcase/Source/GamepadTest/GamepadTest.cpp | 4 ++--
 examples/FeatureShowcase/Source/GamepadTest/GamepadTest.hpp | 2 +-
 .../Source/HTTPClientTest/HTTPClientTest.cpp                | 6 +++---
 .../Source/HTTPClientTest/HTTPClientTest.hpp                | 2 +-
 .../HardwareInstancingTest/HardwareInstancingTest.cpp       | 4 ++--
 .../HardwareInstancingTest/HardwareInstancingTest.hpp       | 2 +-
 .../Source/ImageEffectsTest/ImageEffectsTest.cpp            | 4 ++--
 .../Source/ImageEffectsTest/ImageEffectsTest.hpp            | 2 +-
 .../FeatureShowcase/Source/LineBatchTest/LineBatchTest.cpp  | 4 ++--
 .../FeatureShowcase/Source/LineBatchTest/LineBatchTest.hpp  | 2 +-
 .../Source/Particle2DTest/Particle2DTest.cpp                | 4 ++--
 .../Source/Particle2DTest/Particle2DTest.hpp                | 2 +-
 .../Source/Particle3DTest/Particle3DTest.cpp                | 4 ++--
 .../Source/Particle3DTest/Particle3DTest.hpp                | 2 +-
 .../ParticleClipLoaderTest/ParticleClipLoaderTest.cpp       | 4 ++--
 .../ParticleClipLoaderTest/ParticleClipLoaderTest.hpp       | 2 +-
 .../Source/PolylineDrawingTest/PolylineDrawingTest.cpp      | 4 ++--
 .../Source/PolylineDrawingTest/PolylineDrawingTest.hpp      | 2 +-
 .../Source/PrimitiveBatchTest/PrimitiveBatchTest.cpp        | 4 ++--
 .../Source/PrimitiveBatchTest/PrimitiveBatchTest.hpp        | 2 +-
 .../FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.cpp  | 4 ++--
 .../FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.hpp  | 2 +-
 .../Source/Skeletal2DTest/Skeletal2DTest.cpp                | 4 ++--
 .../Source/Skeletal2DTest/Skeletal2DTest.hpp                | 2 +-
 .../Source/Skinning2DTest/Skinning2DTest.cpp                | 4 ++--
 .../Source/Skinning2DTest/Skinning2DTest.hpp                | 2 +-
 .../Source/SpriteBatchTest/SpriteBatchTest.cpp              | 4 ++--
 .../Source/SpriteBatchTest/SpriteBatchTest.hpp              | 2 +-
 .../Source/SpriteFontTest/SpriteFontTest.cpp                | 4 ++--
 .../Source/SpriteFontTest/SpriteFontTest.hpp                | 2 +-
 .../Source/SpriteLineTest/SpriteLineTest.cpp                | 4 ++--
 .../Source/SpriteLineTest/SpriteLineTest.hpp                | 2 +-
 .../Source/Texture2DLoaderTest/Texture2DLoaderTest.cpp      | 4 ++--
 .../Source/Texture2DLoaderTest/Texture2DLoaderTest.hpp      | 2 +-
 .../Source/VoxelModelTest/VoxelModelTest.cpp                | 4 ++--
 .../Source/VoxelModelTest/VoxelModelTest.hpp                | 2 +-
 examples/Pong/Platform.Cocoa/AppDelegate.mm                 | 2 +-
 examples/Pong/Platform.Win32/main.cpp                       | 2 +-
 examples/Pong/Platform.X11/main.cpp                         | 2 +-
 examples/Pong/Source/PongGame.cpp                           | 4 ++--
 examples/Pong/Source/PongGame.hpp                           | 2 +-
 examples/QuickStart/Platform.Cocoa/AppDelegate.mm           | 2 +-
 examples/QuickStart/Platform.Win32/main.cpp                 | 2 +-
 examples/QuickStart/Platform.X11/main.cpp                   | 2 +-
 examples/QuickStart/Source/QuickStartGame.cpp               | 4 ++--
 examples/QuickStart/Source/QuickStartGame.hpp               | 2 +-
 71 files changed, 102 insertions(+), 102 deletions(-)

diff --git a/examples/FeatureShowcase/Platform.Cocoa/AppDelegate.mm b/examples/FeatureShowcase/Platform.Cocoa/AppDelegate.mm
index 7b433bfe5..c36982adf 100644
--- a/examples/FeatureShowcase/Platform.Cocoa/AppDelegate.mm
+++ b/examples/FeatureShowcase/Platform.Cocoa/AppDelegate.mm
@@ -42,7 +42,7 @@ - (void)applicationDidFinishLaunching:(NSNotification*)aNotification
     bootstrap.SetWindow(self.window);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/FeatureShowcase/Platform.Win32/main.cpp b/examples/FeatureShowcase/Platform.Win32/main.cpp
index 393f2693b..68076a792 100644
--- a/examples/FeatureShowcase/Platform.Win32/main.cpp
+++ b/examples/FeatureShowcase/Platform.Win32/main.cpp
@@ -44,7 +44,7 @@ int APIENTRY _tWinMain(
     bootstrap.SetBackBufferSize(800, 480);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
 #if defined(POMDOG_CRTDEBUG)
         _CrtDbgBreak();
diff --git a/examples/FeatureShowcase/Platform.X11/main.cpp b/examples/FeatureShowcase/Platform.X11/main.cpp
index 441b48f82..81bef4fd3 100644
--- a/examples/FeatureShowcase/Platform.X11/main.cpp
+++ b/examples/FeatureShowcase/Platform.X11/main.cpp
@@ -16,7 +16,7 @@ int main(int argc, char** argv)
     Pomdog::X11::Bootstrap bootstrap;
     bootstrap.SetBackBufferSize(800, 480);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.cpp b/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.cpp
index 50a02f5c2..745c3bd75 100644
--- a/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.cpp
+++ b/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.cpp
@@ -20,12 +20,12 @@ AnimationGraphTest::AnimationGraphTest(const std::shared_ptr<GameHost>& gameHost
 {
 }
 
-std::shared_ptr<Error> AnimationGraphTest::Initialize()
+std::unique_ptr<Error> AnimationGraphTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.hpp b/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.hpp
index 682ee53ea..2c4927628 100644
--- a/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.hpp
+++ b/examples/FeatureShowcase/Source/AnimationGraphTest/AnimationGraphTest.hpp
@@ -20,7 +20,7 @@ class AnimationGraphTest final : public Game {
 public:
     explicit AnimationGraphTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.cpp b/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.cpp
index bad8b523a..c69da1e4e 100644
--- a/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.cpp
+++ b/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.cpp
@@ -9,12 +9,12 @@ AudioClipTest::AudioClipTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> AudioClipTest::Initialize()
+std::unique_ptr<Error> AudioClipTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.hpp b/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.hpp
index 31c7a002c..e86c02a3b 100644
--- a/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.hpp
+++ b/examples/FeatureShowcase/Source/AudioClipTest/AudioClipTest.hpp
@@ -15,7 +15,7 @@ class AudioClipTest final : public Game {
 public:
     explicit AudioClipTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.cpp b/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.cpp
index 2dd505dba..b588c2580 100644
--- a/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.cpp
+++ b/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.cpp
@@ -11,12 +11,12 @@ BasicEffectTest::BasicEffectTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> BasicEffectTest::Initialize()
+std::unique_ptr<Error> BasicEffectTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.hpp b/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.hpp
index 111eb2c81..90daff95c 100644
--- a/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.hpp
+++ b/examples/FeatureShowcase/Source/BasicEffectTest/BasicEffectTest.hpp
@@ -10,7 +10,7 @@ class BasicEffectTest final : public Game {
 public:
     explicit BasicEffectTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.cpp b/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.cpp
index 330b2c99c..f3789e2d6 100644
--- a/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.cpp
+++ b/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.cpp
@@ -12,12 +12,12 @@ Beam2DTest::Beam2DTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> Beam2DTest::Initialize()
+std::unique_ptr<Error> Beam2DTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.hpp b/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.hpp
index ef3b45057..90e40e213 100644
--- a/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.hpp
+++ b/examples/FeatureShowcase/Source/Beam2DTest/Beam2DTest.hpp
@@ -13,7 +13,7 @@ class Beam2DTest final : public Game {
 public:
     explicit Beam2DTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.cpp b/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.cpp
index f2a64bdb6..c87fe3dfb 100644
--- a/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.cpp
+++ b/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.cpp
@@ -11,12 +11,12 @@ BillboardBatchTest::BillboardBatchTest(const std::shared_ptr<GameHost>& gameHost
 {
 }
 
-std::shared_ptr<Error> BillboardBatchTest::Initialize()
+std::unique_ptr<Error> BillboardBatchTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.hpp b/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.hpp
index ce2df5f33..8424d51eb 100644
--- a/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.hpp
+++ b/examples/FeatureShowcase/Source/BillboardBatchTest/BillboardBatchTest.hpp
@@ -12,7 +12,7 @@ class BillboardBatchTest final : public Game {
 public:
     explicit BillboardBatchTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.cpp b/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.cpp
index 711faf560..f6446b673 100644
--- a/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.cpp
+++ b/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.cpp
@@ -10,12 +10,12 @@ DistanceFieldFontTest::DistanceFieldFontTest(const std::shared_ptr<GameHost>& ga
 {
 }
 
-std::shared_ptr<Error> DistanceFieldFontTest::Initialize()
+std::unique_ptr<Error> DistanceFieldFontTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.hpp b/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.hpp
index cf0a46a7d..4a8f9c0e0 100644
--- a/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.hpp
+++ b/examples/FeatureShowcase/Source/DistanceFieldFontTest/DistanceFieldFontTest.hpp
@@ -15,7 +15,7 @@ class DistanceFieldFontTest final : public Game {
 public:
     explicit DistanceFieldFontTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.cpp b/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.cpp
index 0c519daf7..835b8d2e5 100644
--- a/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.cpp
+++ b/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.cpp
@@ -9,12 +9,12 @@ EditorGUITest::EditorGUITest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> EditorGUITest::Initialize()
+std::unique_ptr<Error> EditorGUITest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.hpp b/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.hpp
index f37633eb3..bc585afe6 100644
--- a/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.hpp
+++ b/examples/FeatureShowcase/Source/EditorGUITest/EditorGUITest.hpp
@@ -34,7 +34,7 @@ class EditorGUITest final : public Game {
 public:
     explicit EditorGUITest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/FeatureShowcaseGame.cpp b/examples/FeatureShowcase/Source/FeatureShowcaseGame.cpp
index 8d8eab5c9..190e5dd80 100644
--- a/examples/FeatureShowcase/Source/FeatureShowcaseGame.cpp
+++ b/examples/FeatureShowcase/Source/FeatureShowcaseGame.cpp
@@ -42,7 +42,7 @@ FeatureShowcaseGame::FeatureShowcaseGame(const std::shared_ptr<GameHost>& gameHo
 {
 }
 
-std::shared_ptr<Error>
+std::unique_ptr<Error>
 FeatureShowcaseGame::Initialize()
 {
     window->SetTitle("Feature Showcase");
diff --git a/examples/FeatureShowcase/Source/FeatureShowcaseGame.hpp b/examples/FeatureShowcase/Source/FeatureShowcaseGame.hpp
index 2df1e71a8..c476c2f65 100644
--- a/examples/FeatureShowcase/Source/FeatureShowcaseGame.hpp
+++ b/examples/FeatureShowcase/Source/FeatureShowcaseGame.hpp
@@ -29,7 +29,7 @@ class FeatureShowcaseGame final : public Game {
 public:
     explicit FeatureShowcaseGame(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.cpp b/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.cpp
index e102c320c..2c2dea810 100644
--- a/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.cpp
+++ b/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.cpp
@@ -15,12 +15,12 @@ GIFDecodeTest::GIFDecodeTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> GIFDecodeTest::Initialize()
+std::unique_ptr<Error> GIFDecodeTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.hpp b/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.hpp
index 29297e6b7..3199736fe 100644
--- a/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.hpp
+++ b/examples/FeatureShowcase/Source/GIFDecodeTest/GIFDecodeTest.hpp
@@ -13,7 +13,7 @@ class GIFDecodeTest final : public Game {
 public:
     explicit GIFDecodeTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.cpp b/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.cpp
index e668818b2..7be5205fa 100644
--- a/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.cpp
+++ b/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.cpp
@@ -13,12 +13,12 @@ GLTFModelTest::GLTFModelTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> GLTFModelTest::Initialize()
+std::unique_ptr<Error> GLTFModelTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.hpp b/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.hpp
index f6e3e83d6..8b42f8bae 100644
--- a/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.hpp
+++ b/examples/FeatureShowcase/Source/GLTFModelTest/GLTFModelTest.hpp
@@ -10,7 +10,7 @@ class GLTFModelTest final : public Game {
 public:
     explicit GLTFModelTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.cpp b/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.cpp
index d0551f14a..95b4734eb 100644
--- a/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.cpp
+++ b/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.cpp
@@ -9,12 +9,12 @@ GUISplitterTest::GUISplitterTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> GUISplitterTest::Initialize()
+std::unique_ptr<Error> GUISplitterTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.hpp b/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.hpp
index 90852e2fb..0740ebd24 100644
--- a/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.hpp
+++ b/examples/FeatureShowcase/Source/GUISplitterTest/GUISplitterTest.hpp
@@ -14,7 +14,7 @@ class GUISplitterTest final : public Game {
 public:
     explicit GUISplitterTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.cpp b/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.cpp
index 05fd5d1be..030f57b52 100644
--- a/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.cpp
+++ b/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.cpp
@@ -9,12 +9,12 @@ GamepadTest::GamepadTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> GamepadTest::Initialize()
+std::unique_ptr<Error> GamepadTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.hpp b/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.hpp
index a059d2b6c..d0fe9339d 100644
--- a/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.hpp
+++ b/examples/FeatureShowcase/Source/GamepadTest/GamepadTest.hpp
@@ -16,7 +16,7 @@ class GamepadTest final : public Game {
 public:
     explicit GamepadTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.cpp b/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.cpp
index 62971d042..2071ed026 100644
--- a/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.cpp
+++ b/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.cpp
@@ -9,12 +9,12 @@ HTTPClientTest::HTTPClientTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> HTTPClientTest::Initialize()
+std::unique_ptr<Error> HTTPClientTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
@@ -33,7 +33,7 @@ std::shared_ptr<Error> HTTPClientTest::Initialize()
     spriteFont->PrepareFonts("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345689.,!?-+/():;%&`'*#=[]\" ");
 
     auto http = gameHost->GetHTTPClient();
-    auto callback = [this](const std::shared_ptr<HTTPResponse>& resp, const std::shared_ptr<Error>& err) {
+    auto callback = [this](const std::shared_ptr<HTTPResponse>& resp, const std::unique_ptr<Error>& err) {
         if (err != nullptr) {
             webText = err->ToString();
             return;
diff --git a/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.hpp b/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.hpp
index a30710400..91d977473 100644
--- a/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.hpp
+++ b/examples/FeatureShowcase/Source/HTTPClientTest/HTTPClientTest.hpp
@@ -15,7 +15,7 @@ class HTTPClientTest final : public Game {
 public:
     explicit HTTPClientTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.cpp b/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.cpp
index 040627a82..7893a4b6a 100644
--- a/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.cpp
+++ b/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.cpp
@@ -11,12 +11,12 @@ HardwareInstancingTest::HardwareInstancingTest(const std::shared_ptr<GameHost>&
 {
 }
 
-std::shared_ptr<Error> HardwareInstancingTest::Initialize()
+std::unique_ptr<Error> HardwareInstancingTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.hpp b/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.hpp
index 912d5b0bb..b3d585bef 100644
--- a/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.hpp
+++ b/examples/FeatureShowcase/Source/HardwareInstancingTest/HardwareInstancingTest.hpp
@@ -10,7 +10,7 @@ class HardwareInstancingTest final : public Game {
 public:
     explicit HardwareInstancingTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.cpp b/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.cpp
index 3611da8fb..39a2ab76d 100644
--- a/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.cpp
+++ b/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.cpp
@@ -17,12 +17,12 @@ ImageEffectsTest::ImageEffectsTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> ImageEffectsTest::Initialize()
+std::unique_ptr<Error> ImageEffectsTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.hpp b/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.hpp
index 6941ae15b..42b8f6992 100644
--- a/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.hpp
+++ b/examples/FeatureShowcase/Source/ImageEffectsTest/ImageEffectsTest.hpp
@@ -13,7 +13,7 @@ class ImageEffectsTest final : public Game {
 public:
     explicit ImageEffectsTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.cpp b/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.cpp
index 7bf7941e6..7274f00dd 100644
--- a/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.cpp
+++ b/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.cpp
@@ -10,12 +10,12 @@ LineBatchTest::LineBatchTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> LineBatchTest::Initialize()
+std::unique_ptr<Error> LineBatchTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.hpp b/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.hpp
index f85505fed..39f18b283 100644
--- a/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.hpp
+++ b/examples/FeatureShowcase/Source/LineBatchTest/LineBatchTest.hpp
@@ -11,7 +11,7 @@ class LineBatchTest final : public Game {
 public:
     explicit LineBatchTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.cpp b/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.cpp
index 5f7776860..1d2314c16 100644
--- a/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.cpp
+++ b/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.cpp
@@ -124,12 +124,12 @@ Particle2DTest::Particle2DTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> Particle2DTest::Initialize()
+std::unique_ptr<Error> Particle2DTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.hpp b/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.hpp
index 08fa88801..f75e82ceb 100644
--- a/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.hpp
+++ b/examples/FeatureShowcase/Source/Particle2DTest/Particle2DTest.hpp
@@ -14,7 +14,7 @@ class Particle2DTest final : public Game {
 public:
     explicit Particle2DTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.cpp b/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.cpp
index f983abc99..e6832f4d4 100644
--- a/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.cpp
+++ b/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.cpp
@@ -36,12 +36,12 @@ Particle3DTest::Particle3DTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> Particle3DTest::Initialize()
+std::unique_ptr<Error> Particle3DTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.hpp b/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.hpp
index dd9b8862b..25d1b9ef6 100644
--- a/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.hpp
+++ b/examples/FeatureShowcase/Source/Particle3DTest/Particle3DTest.hpp
@@ -14,7 +14,7 @@ class Particle3DTest final : public Game {
 public:
     explicit Particle3DTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.cpp b/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.cpp
index 9e5298442..78a07c427 100644
--- a/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.cpp
+++ b/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.cpp
@@ -11,12 +11,12 @@ ParticleClipLoaderTest::ParticleClipLoaderTest(const std::shared_ptr<GameHost>&
 {
 }
 
-std::shared_ptr<Error> ParticleClipLoaderTest::Initialize()
+std::unique_ptr<Error> ParticleClipLoaderTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.hpp b/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.hpp
index 5e21d42bb..eada65eff 100644
--- a/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.hpp
+++ b/examples/FeatureShowcase/Source/ParticleClipLoaderTest/ParticleClipLoaderTest.hpp
@@ -14,7 +14,7 @@ class ParticleClipLoaderTest final : public Game {
 public:
     explicit ParticleClipLoaderTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.cpp b/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.cpp
index 25fbfab66..977267c49 100644
--- a/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.cpp
+++ b/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.cpp
@@ -10,12 +10,12 @@ PolylineDrawingTest::PolylineDrawingTest(const std::shared_ptr<GameHost>& gameHo
 {
 }
 
-std::shared_ptr<Error> PolylineDrawingTest::Initialize()
+std::unique_ptr<Error> PolylineDrawingTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.hpp b/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.hpp
index 5754908cb..6f867f63d 100644
--- a/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.hpp
+++ b/examples/FeatureShowcase/Source/PolylineDrawingTest/PolylineDrawingTest.hpp
@@ -11,7 +11,7 @@ class PolylineDrawingTest final : public Game {
 public:
     explicit PolylineDrawingTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.cpp b/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.cpp
index 6cb189afb..4a56f3553 100644
--- a/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.cpp
+++ b/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.cpp
@@ -10,12 +10,12 @@ PrimitiveBatchTest::PrimitiveBatchTest(const std::shared_ptr<GameHost>& gameHost
 {
 }
 
-std::shared_ptr<Error> PrimitiveBatchTest::Initialize()
+std::unique_ptr<Error> PrimitiveBatchTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.hpp b/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.hpp
index f4c0ac7cc..0d150c3d1 100644
--- a/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.hpp
+++ b/examples/FeatureShowcase/Source/PrimitiveBatchTest/PrimitiveBatchTest.hpp
@@ -11,7 +11,7 @@ class PrimitiveBatchTest final : public Game {
 public:
     explicit PrimitiveBatchTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.cpp b/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.cpp
index 994917678..ab34ceaef 100644
--- a/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.cpp
+++ b/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.cpp
@@ -10,12 +10,12 @@ SVGDecodeTest::SVGDecodeTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> SVGDecodeTest::Initialize()
+std::unique_ptr<Error> SVGDecodeTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.hpp b/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.hpp
index f00bf2824..a9ea6de1d 100644
--- a/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.hpp
+++ b/examples/FeatureShowcase/Source/SVGDecodeTest/SVGDecodeTest.hpp
@@ -15,7 +15,7 @@ class SVGDecodeTest final : public Game {
 public:
     explicit SVGDecodeTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.cpp b/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.cpp
index 24a1cdcc1..a733ff9ab 100644
--- a/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.cpp
+++ b/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.cpp
@@ -18,12 +18,12 @@ Skeletal2DTest::Skeletal2DTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> Skeletal2DTest::Initialize()
+std::unique_ptr<Error> Skeletal2DTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.hpp b/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.hpp
index b3c016593..fffb858de 100644
--- a/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.hpp
+++ b/examples/FeatureShowcase/Source/Skeletal2DTest/Skeletal2DTest.hpp
@@ -18,7 +18,7 @@ class Skeletal2DTest final : public Game {
 public:
     explicit Skeletal2DTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.cpp b/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.cpp
index 3828bfcd8..1dd4759a9 100644
--- a/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.cpp
+++ b/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.cpp
@@ -19,12 +19,12 @@ Skinning2DTest::Skinning2DTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> Skinning2DTest::Initialize()
+std::unique_ptr<Error> Skinning2DTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.hpp b/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.hpp
index bdd586d56..f7658ae2a 100644
--- a/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.hpp
+++ b/examples/FeatureShowcase/Source/Skinning2DTest/Skinning2DTest.hpp
@@ -19,7 +19,7 @@ class Skinning2DTest final : public Game {
 public:
     explicit Skinning2DTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.cpp b/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.cpp
index a990c9688..1aa10f80a 100644
--- a/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.cpp
+++ b/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.cpp
@@ -12,12 +12,12 @@ SpriteBatchTest::SpriteBatchTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> SpriteBatchTest::Initialize()
+std::unique_ptr<Error> SpriteBatchTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.hpp b/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.hpp
index a1e698380..4f9310712 100644
--- a/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.hpp
+++ b/examples/FeatureShowcase/Source/SpriteBatchTest/SpriteBatchTest.hpp
@@ -12,7 +12,7 @@ class SpriteBatchTest final : public Game {
 public:
     explicit SpriteBatchTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.cpp b/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.cpp
index ce06f9ee5..2e417bb25 100644
--- a/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.cpp
+++ b/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.cpp
@@ -9,12 +9,12 @@ SpriteFontTest::SpriteFontTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> SpriteFontTest::Initialize()
+std::unique_ptr<Error> SpriteFontTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.hpp b/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.hpp
index f80414512..32fe52d01 100644
--- a/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.hpp
+++ b/examples/FeatureShowcase/Source/SpriteFontTest/SpriteFontTest.hpp
@@ -15,7 +15,7 @@ class SpriteFontTest final : public Game {
 public:
     explicit SpriteFontTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.cpp b/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.cpp
index 6a601f0bb..78041baeb 100644
--- a/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.cpp
+++ b/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.cpp
@@ -11,12 +11,12 @@ SpriteLineTest::SpriteLineTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> SpriteLineTest::Initialize()
+std::unique_ptr<Error> SpriteLineTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.hpp b/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.hpp
index b9b64c295..097a36fe9 100644
--- a/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.hpp
+++ b/examples/FeatureShowcase/Source/SpriteLineTest/SpriteLineTest.hpp
@@ -12,7 +12,7 @@ class SpriteLineTest final : public Game {
 public:
     explicit SpriteLineTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.cpp b/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.cpp
index 114e8f29b..f5d2b88ff 100644
--- a/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.cpp
+++ b/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.cpp
@@ -9,12 +9,12 @@ Texture2DLoaderTest::Texture2DLoaderTest(const std::shared_ptr<GameHost>& gameHo
 {
 }
 
-std::shared_ptr<Error> Texture2DLoaderTest::Initialize()
+std::unique_ptr<Error> Texture2DLoaderTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.hpp b/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.hpp
index 7a25ad310..dc60034b1 100644
--- a/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.hpp
+++ b/examples/FeatureShowcase/Source/Texture2DLoaderTest/Texture2DLoaderTest.hpp
@@ -15,7 +15,7 @@ class Texture2DLoaderTest final : public Game {
 public:
     explicit Texture2DLoaderTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.cpp b/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.cpp
index 85e79e634..63ca9dad8 100644
--- a/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.cpp
+++ b/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.cpp
@@ -9,12 +9,12 @@ VoxelModelTest::VoxelModelTest(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> VoxelModelTest::Initialize()
+std::unique_ptr<Error> VoxelModelTest::Initialize()
 {
     auto assets = gameHost->GetAssetManager();
     auto clock = gameHost->GetClock();
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.hpp b/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.hpp
index 62a73b2f5..99fe3171d 100644
--- a/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.hpp
+++ b/examples/FeatureShowcase/Source/VoxelModelTest/VoxelModelTest.hpp
@@ -13,7 +13,7 @@ class VoxelModelTest final : public Game {
 public:
     explicit VoxelModelTest(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/Pong/Platform.Cocoa/AppDelegate.mm b/examples/Pong/Platform.Cocoa/AppDelegate.mm
index 2e67f4ede..5dec462d7 100644
--- a/examples/Pong/Platform.Cocoa/AppDelegate.mm
+++ b/examples/Pong/Platform.Cocoa/AppDelegate.mm
@@ -42,7 +42,7 @@ - (void)applicationDidFinishLaunching:(NSNotification*)aNotification
     bootstrap.SetWindow(self.window);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/Pong/Platform.Win32/main.cpp b/examples/Pong/Platform.Win32/main.cpp
index 756698820..4706fab54 100644
--- a/examples/Pong/Platform.Win32/main.cpp
+++ b/examples/Pong/Platform.Win32/main.cpp
@@ -44,7 +44,7 @@ int APIENTRY _tWinMain(
     bootstrap.SetBackBufferSize(800, 480);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
 #if defined(POMDOG_CRTDEBUG)
         _CrtDbgBreak();
diff --git a/examples/Pong/Platform.X11/main.cpp b/examples/Pong/Platform.X11/main.cpp
index af1d55072..37d27462a 100644
--- a/examples/Pong/Platform.X11/main.cpp
+++ b/examples/Pong/Platform.X11/main.cpp
@@ -16,7 +16,7 @@ int main(int argc, char** argv)
     Pomdog::X11::Bootstrap bootstrap;
     bootstrap.SetBackBufferSize(800, 480);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/Pong/Source/PongGame.cpp b/examples/Pong/Source/PongGame.cpp
index f011e26a8..9136dc23e 100644
--- a/examples/Pong/Source/PongGame.cpp
+++ b/examples/Pong/Source/PongGame.cpp
@@ -25,7 +25,7 @@ PongGame::PongGame(const std::shared_ptr<GameHost>& gameHostIn)
     window->SetAllowUserResizing(true);
 }
 
-std::shared_ptr<Error> PongGame::Initialize()
+std::unique_ptr<Error> PongGame::Initialize()
 {
     // NOTE: Set window name
     window->SetTitle("Pomdog Pong");
@@ -33,7 +33,7 @@ std::shared_ptr<Error> PongGame::Initialize()
     // NOTE: Set main volume
     audioEngine->SetMainVolume(0.4f);
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/Pong/Source/PongGame.hpp b/examples/Pong/Source/PongGame.hpp
index a3b9afb0c..dbbbd09db 100644
--- a/examples/Pong/Source/PongGame.hpp
+++ b/examples/Pong/Source/PongGame.hpp
@@ -143,7 +143,7 @@ class PongGame final : public Game {
 public:
     explicit PongGame(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;
diff --git a/examples/QuickStart/Platform.Cocoa/AppDelegate.mm b/examples/QuickStart/Platform.Cocoa/AppDelegate.mm
index 361e8673e..fdfbd2444 100644
--- a/examples/QuickStart/Platform.Cocoa/AppDelegate.mm
+++ b/examples/QuickStart/Platform.Cocoa/AppDelegate.mm
@@ -42,7 +42,7 @@ - (void)applicationDidFinishLaunching:(NSNotification*)aNotification
     bootstrap.SetWindow(self.window);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/QuickStart/Platform.Win32/main.cpp b/examples/QuickStart/Platform.Win32/main.cpp
index 755b65ac0..c7968c32a 100644
--- a/examples/QuickStart/Platform.Win32/main.cpp
+++ b/examples/QuickStart/Platform.Win32/main.cpp
@@ -44,7 +44,7 @@ int APIENTRY _tWinMain(
     bootstrap.SetBackBufferSize(800, 480);
     bootstrap.SetOpenGLEnabled(false);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
 #if defined(POMDOG_CRTDEBUG)
         _CrtDbgBreak();
diff --git a/examples/QuickStart/Platform.X11/main.cpp b/examples/QuickStart/Platform.X11/main.cpp
index 17d1a3235..6141a9e1f 100644
--- a/examples/QuickStart/Platform.X11/main.cpp
+++ b/examples/QuickStart/Platform.X11/main.cpp
@@ -16,7 +16,7 @@ int main(int argc, char** argv)
     Pomdog::X11::Bootstrap bootstrap;
     bootstrap.SetBackBufferSize(800, 480);
 
-    bootstrap.OnError([](std::shared_ptr<Error>&& err) {
+    bootstrap.OnError([](std::unique_ptr<Error>&& err) {
         Log::Critical("Pomdog", err->ToString());
     });
 
diff --git a/examples/QuickStart/Source/QuickStartGame.cpp b/examples/QuickStart/Source/QuickStartGame.cpp
index af6c6dfdd..eae392649 100644
--- a/examples/QuickStart/Source/QuickStartGame.cpp
+++ b/examples/QuickStart/Source/QuickStartGame.cpp
@@ -14,7 +14,7 @@ QuickStartGame::QuickStartGame(const std::shared_ptr<GameHost>& gameHostIn)
 {
 }
 
-std::shared_ptr<Error> QuickStartGame::Initialize()
+std::unique_ptr<Error> QuickStartGame::Initialize()
 {
     // NOTE: Display message in log console
     Log::Verbose("Hello, QuickStart.");
@@ -22,7 +22,7 @@ std::shared_ptr<Error> QuickStartGame::Initialize()
     // NOTE: Set window name
     window->SetTitle("QuickStart");
 
-    std::shared_ptr<Error> err;
+    std::unique_ptr<Error> err;
 
     // NOTE: Create graphics command list
     std::tie(commandList, err) = graphicsDevice->CreateGraphicsCommandList();
diff --git a/examples/QuickStart/Source/QuickStartGame.hpp b/examples/QuickStart/Source/QuickStartGame.hpp
index 95b390357..e6691ca34 100644
--- a/examples/QuickStart/Source/QuickStartGame.hpp
+++ b/examples/QuickStart/Source/QuickStartGame.hpp
@@ -15,7 +15,7 @@ class QuickStartGame final : public Game {
 public:
     explicit QuickStartGame(const std::shared_ptr<GameHost>& gameHost);
 
-    [[nodiscard]] std::shared_ptr<Error>
+    [[nodiscard]] std::unique_ptr<Error>
     Initialize() override;
 
     void Update() override;