Merge branch 'master' into develop

update cocoapods on travis
bump xcode and swift version on travis
2018-09-22 23:20:46 +03:00 · 2018-09-22 20:47:45 +01:00 · 2018-09-22 20:16:49 +01:00 · 2018-09-22 20:16:49 +01:00 · 2018-09-22 20:01:16 +01:00 · 2018-09-22 19:48:10 +01:00
35 changed files with 976 additions and 148 deletions
@@ -1 +1 @@
-4
+4.2
@@ -3,19 +3,16 @@ matrix:
    - os: linux
  include:
    - script:
-        - set -o pipefail && xcodebuild test -workspace Dip.xcworkspace -scheme Dip -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=10.1' ONLY_ACTIVE_ARCH=NO | xcpretty -c
+        - set -o pipefail && xcodebuild test -workspace Dip.xcworkspace -scheme Dip -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=latest' ONLY_ACTIVE_ARCH=NO | xcpretty -c
        - set -o pipefail && xcodebuild test -workspace Dip.xcworkspace -scheme Dip -sdk macosx -destination 'platform=macOS,arch=x86_64' ONLY_ACTIVE_ARCH=NO | xcpretty -c
-        - set -o pipefail && xcodebuild test -workspace Dip.xcworkspace -scheme Dip -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV 1080p,OS=latest' ONLY_ACTIVE_ARCH=NO | xcpretty -c
-        # disable running watchos until https://github.com/travis-ci/travis-ci/issues/7580 is fixed
-        #- set -o pipefail && xcodebuild -workspace Dip.xcworkspace -scheme Dip -sdk watchsimulator -destination 'platform=watchOS Simulator,name=Apple Watch - 38mm,OS=latest' ONLY_ACTIVE_ARCH=NO | xcpretty - c
-        - set -o pipefail && xcodebuild test -workspace Dip.xcworkspace -scheme DipSampleApp -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=10.1' ONLY_ACTIVE_ARCH=NO | xcpretty -c
        - pod spec lint --allow-warnings
        - carthage build --no-skip-current
+        - swift package clean && swift build && swift test
      os: osx
-      osx_image: xcode9
+      osx_image: xcode10
      language: objective-c
      before_install:
-        - gem install cocoapods --version 1.1.0.rc.2 --no-document
+        - gem install cocoapods --version 1.6.0.beta.1 --no-document
    - script:
        - swift package clean && swift build && swift test
      os: linux
@@ -25,22 +22,8 @@ matrix:
      before_install:
        - wget -q -O - https://swift.org/keys/all-keys.asc | gpg --import -
        - cd ..
-        - export SWIFT_VERSION=swift-4.0-RELEASE
-        - wget https://swift.org/builds/swift-4.0-release/ubuntu1404/$SWIFT_VERSION/$SWIFT_VERSION-ubuntu14.04.tar.gz
-        - tar xzf $SWIFT_VERSION-ubuntu14.04.tar.gz
-        - export PATH="${PWD}/${SWIFT_VERSION}-ubuntu14.04/usr/bin:${PATH}"
-        - cd Dip
-    - script:
-        - swift package clean && swift build && swift test
-      os: linux
-      dist: trusty
-      sudo: required
-      language: generic
-      before_install:
-        - wget -q -O - https://swift.org/keys/all-keys.asc | gpg --import -
-        - cd ..
-        - export SWIFT_VERSION=swift-3.1-RELEASE
-        - wget https://swift.org/builds/swift-3.1-release/ubuntu1404/$SWIFT_VERSION/$SWIFT_VERSION-ubuntu14.04.tar.gz
+        - export SWIFT_VERSION=swift-4.2-RELEASE
+        - wget https://swift.org/builds/swift-4.2-release/ubuntu1404/$SWIFT_VERSION/$SWIFT_VERSION-ubuntu14.04.tar.gz
        - tar xzf $SWIFT_VERSION-ubuntu14.04.tar.gz
        - export PATH="${PWD}/${SWIFT_VERSION}-ubuntu14.04/usr/bin:${PATH}"
        - cd Dip
@@ -1,5 +1,18 @@
 # CHANGELOG

+## 7.0.0
+
+* Swift 4.2 support.
+* Fixed some issues when reusing instances previously resolved as optionals.
+* Dip-UI is now part of Dip.
+
+## 6.1
+
+* Swift 4.1 support.
+* Fixed crashes resolving singletons using collaborating containers.
+  [#179](https://github.com/AliSoftware/Dip/pull/179), [@trimmurrti](https://github.com/trimmurrti)
+  [#182](https://github.com/AliSoftware/Dip/pull/182), [@tapsandswipes](https://github.com/tapsandswipes)
+
 ## 6.0

 * Swift 4 support
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
  s.name             = "Dip"
-  s.version          = "6.0"
+  s.version          = "7.0.0"
  s.summary          = "Dependency Injection for Swift made easy."

  s.description      = <<-DESC
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
@@ -31,6 +31,8 @@
 		09FC480F1DAA9CAF00566AA8 /* Register.swift in Sources */ = {isa = PBXBuildFile; fileRef = 09FC480C1DAA9CAF00566AA8 /* Register.swift */; };
 		09FC48181DAAA53100566AA8 /* DipError.swift in Sources */ = {isa = PBXBuildFile; fileRef = 09FC48161DAAA53100566AA8 /* DipError.swift */; };
 		09FC481E1DAAA8F900566AA8 /* ComponentScope.swift in Sources */ = {isa = PBXBuildFile; fileRef = 09FC481C1DAAA8F900566AA8 /* ComponentScope.swift */; };
+		63937A6A21524C0B00AEE75A /* StoryboardInstantiatable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 63937A6921524C0B00AEE75A /* StoryboardInstantiatable.swift */; };
+		63937A6F21524DA300AEE75A /* DipUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 63937A6B21524DA200AEE75A /* DipUITests.swift */; };
 /* End PBXBuildFile section */

 /* Begin PBXContainerItemProxy section */
@@ -71,6 +73,11 @@
 		09FC480C1DAA9CAF00566AA8 /* Register.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = Register.swift; path = ../../Sources/Register.swift; sourceTree = "<group>"; };
 		09FC48161DAAA53100566AA8 /* DipError.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = DipError.swift; path = ../../Sources/DipError.swift; sourceTree = "<group>"; };
 		09FC481C1DAAA8F900566AA8 /* ComponentScope.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = ComponentScope.swift; path = ../../Sources/ComponentScope.swift; sourceTree = "<group>"; };
+		63937A6921524C0B00AEE75A /* StoryboardInstantiatable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = StoryboardInstantiatable.swift; path = ../../Sources/StoryboardInstantiatable.swift; sourceTree = "<group>"; };
+		63937A6B21524DA200AEE75A /* DipUITests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = DipUITests.swift; path = ../../Tests/DipTests/DipUITests.swift; sourceTree = "<group>"; };
+		63937A6C21524DA200AEE75A /* NSStoryboard.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; path = NSStoryboard.storyboard; sourceTree = "<group>"; };
+		63937A6D21524DA300AEE75A /* TVStoryboard.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; path = TVStoryboard.storyboard; sourceTree = "<group>"; };
+		63937A6E21524DA300AEE75A /* UIStoryboard.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; path = UIStoryboard.storyboard; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXFrameworksBuildPhase section */
@@ -108,6 +115,7 @@
 				095F829B1D043B41008CD706 /* TypeForwarding.swift */,
 				0982AF0B1C5183A000B62463 /* Utils.swift */,
 				09871B401DAA6BF300B40B91 /* Compatibility.swift */,
+				63937A6921524C0B00AEE75A /* StoryboardInstantiatable.swift */,
 				0919F4CB1C16417000DC3B10 /* Info.plist */,
 			);
 			path = Dip;
@@ -125,6 +133,10 @@
 				09BD350A1D84E30D00B33E53 /* RuntimeArgumentsTests.swift */,
 				09BD350B1D84E30D00B33E53 /* ThreadSafetyTests.swift */,
 				09BD350C1D84E30D00B33E53 /* TypeForwardingTests.swift */,
+				63937A6B21524DA200AEE75A /* DipUITests.swift */,
+				63937A6C21524DA200AEE75A /* NSStoryboard.storyboard */,
+				63937A6D21524DA300AEE75A /* TVStoryboard.storyboard */,
+				63937A6E21524DA300AEE75A /* UIStoryboard.storyboard */,
 				09BD350D1D84E30D00B33E53 /* Utils.swift */,
 				0919F4D11C16417000DC3B10 /* Info.plist */,
 			);
@@ -189,6 +201,7 @@
 			buildPhases = (
 				0903B35D1C161543002241C1 /* Sources */,
 				0903B35E1C161543002241C1 /* Frameworks */,
+				63937A7721524E3B00AEE75A /* ShellScript */,
 				0903B35F1C161543002241C1 /* Resources */,
 			);
 			buildRules = (
@@ -208,7 +221,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0730;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 0930;
 				ORGANIZATIONNAME = AliSoftware;
 				TargetAttributes = {
 					0903B3571C161543002241C1 = {
@@ -256,6 +269,26 @@
 		};
 /* End PBXResourcesBuildPhase section */

+/* Begin PBXShellScriptBuildPhase section */
+		63937A7721524E3B00AEE75A /* ShellScript */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "echo \"${SRCROOT}/DipTests/${STORYBOARD_NAME_PREFIX}Storyboard.storyboard\"\nibtool --compilation-directory \"${TARGET_TEMP_DIR}\" \"${SRCROOT}/DipTests/${STORYBOARD_NAME_PREFIX}Storyboard.storyboard\"\nibtool --link \"${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}\" \"${TARGET_TEMP_DIR}/${STORYBOARD_NAME_PREFIX}Storyboard.storyboardc\"\n";
+		};
+/* End PBXShellScriptBuildPhase section */
+
 /* Begin PBXSourcesBuildPhase section */
 		0903B3531C161543002241C1 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
@@ -265,6 +298,7 @@
 				0982AF0C1C5183A000B62463 /* Utils.swift in Sources */,
 				0919F4D51C16417B00DC3B10 /* Definition.swift in Sources */,
 				09FC481E1DAAA8F900566AA8 /* ComponentScope.swift in Sources */,
+				63937A6A21524C0B00AEE75A /* StoryboardInstantiatable.swift in Sources */,
 				09B036001C5D2B83001EA5B7 /* AutoWiring.swift in Sources */,
 				0919F4D41C16417B00DC3B10 /* Dip.swift in Sources */,
 				09FC480F1DAA9CAF00566AA8 /* Register.swift in Sources */,
@@ -282,6 +316,7 @@
 			files = (
 				09BD35141D84E30D00B33E53 /* RuntimeArgumentsTests.swift in Sources */,
 				09BD35151D84E30D00B33E53 /* ThreadSafetyTests.swift in Sources */,
+				63937A6F21524DA300AEE75A /* DipUITests.swift in Sources */,
 				09BD35121D84E30D00B33E53 /* DefinitionTests.swift in Sources */,
 				09BD350F1D84E30D00B33E53 /* AutoWiringTests.swift in Sources */,
 				09BD35111D84E30D00B33E53 /* ContextTests.swift in Sources */,
@@ -325,6 +360,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.alisoftware.Dip;
 				PRODUCT_NAME = Dip;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -344,6 +380,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.alisoftware.Dip;
 				PRODUCT_NAME = Dip;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -359,7 +396,13 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				PRODUCT_BUNDLE_IDENTIFIER = com.alisoftware.DipTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				STORYBOARD_NAME_PREFIX = NS;
+				"STORYBOARD_NAME_PREFIX[sdk=appletvos*]" = TV;
+				"STORYBOARD_NAME_PREFIX[sdk=appletvsimulator*]" = TV;
+				"STORYBOARD_NAME_PREFIX[sdk=iphoneos*]" = UI;
+				"STORYBOARD_NAME_PREFIX[sdk=iphonesimulator*]" = UI;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -375,6 +418,8 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				PRODUCT_BUNDLE_IDENTIFIER = com.alisoftware.DipTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				STORYBOARD_NAME_PREFIX = "";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -390,12 +435,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -405,7 +452,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 6.0;
+				CURRENT_PROJECT_VERSION = 7.0.0;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -451,12 +498,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -466,7 +515,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 6.0;
+				CURRENT_PROJECT_VERSION = 7.0.0;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "0930"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
@@ -40,9 +40,7 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      codeCoverageEnabled = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
         <TestableReference
            skipped = "NO">
@@ -71,7 +69,6 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
      launchStyle = "0"
      useCustomWorkingDirectory = "NO"
      ignoresPersistentStateOnLaunch = "NO"
@@ -9,7 +9,7 @@
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
+	<string>7.0.0</string>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
@@ -9,7 +9,7 @@
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
+	<string>7.0.0</string>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14313.18" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14313.18"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--Dip View Controller-->
+        <scene sceneID="adI-oe-5KL">
+            <objects>
+                <viewController storyboardIdentifier="DipViewController" id="fzZ-tH-vfC" customClass="DipViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <view key="view" id="vso-jO-9Ex">
+                        <rect key="frame" x="0.0" y="0.0" width="450" height="300"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </view>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="string" keyPath="dipTag" value="vc"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <customObject id="wjM-mL-nmG" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="311" y="339"/>
+        </scene>
+        <!--Nil Tag View Controller-->
+        <scene sceneID="OhX-tC-zpS">
+            <objects>
+                <viewController storyboardIdentifier="NilTagViewController" id="35S-Ec-qEA" customClass="NilTagViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <view key="view" id="y58-K4-cDZ">
+                        <rect key="frame" x="0.0" y="0.0" width="450" height="300"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </view>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="nil" keyPath="dipTag"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <customObject id="pvf-jv-8Cj" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="874" y="339"/>
+        </scene>
+        <!--View Controller-->
+        <scene sceneID="Rwu-gt-fAa">
+            <objects>
+                <viewController storyboardIdentifier="ViewController" id="tne-ER-mvb" sceneMemberID="viewController">
+                    <view key="view" id="Kwe-OO-w0D">
+                        <rect key="frame" x="0.0" y="0.0" width="450" height="300"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </view>
+                </viewController>
+                <customObject id="0u1-hv-ZtW" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="311" y="729"/>
+        </scene>
+    </scenes>
+</document>
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder.AppleTV.Storyboard" version="3.0" toolsVersion="14313.18" targetRuntime="AppleTV" propertyAccessControl="none" useAutolayout="YES" colorMatched="YES" initialViewController="ctX-Lj-Yrr">
+    <device id="appleTV" orientation="landscape">
+        <adaptation id="light"/>
+    </device>
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14283.14"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--Dip View Controller-->
+        <scene sceneID="0jz-eb-APg">
+            <objects>
+                <viewController storyboardIdentifier="DipViewController" id="ctX-Lj-Yrr" customClass="DipViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="TrC-Rh-efi"/>
+                        <viewControllerLayoutGuide type="bottom" id="arQ-XW-qWa"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="syn-UA-YGd">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="string" keyPath="dipTag" value="vc"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="mq6-CB-g6V" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="563" y="-228"/>
+        </scene>
+        <!--View Controller-->
+        <scene sceneID="gDU-un-krd">
+            <objects>
+                <viewController storyboardIdentifier="ViewController" id="UwR-h2-tgS" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="qKG-R0-Nkp"/>
+                        <viewControllerLayoutGuide type="bottom" id="vP4-Si-HAL"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="r35-FI-kgS">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="AIY-qB-Dbe" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="563" y="-16"/>
+        </scene>
+        <!--Nil Tag View Controller-->
+        <scene sceneID="PiH-4i-Txa">
+            <objects>
+                <viewController storyboardIdentifier="NilTagViewController" id="ZLb-1s-1ne" customClass="NilTagViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="arU-Ca-km8"/>
+                        <viewControllerLayoutGuide type="bottom" id="jw1-4B-Xlt"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="NMo-Oi-l7H">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="nil" keyPath="dipTag"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="Cid-Yu-0N6" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="821" y="-228"/>
+        </scene>
+    </scenes>
+</document>
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14313.18" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="5AO-J3-7R4">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14283.14"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="Ole-tM-Q3l">
+            <objects>
+                <viewController storyboardIdentifier="ViewController" id="ehZ-7Y-MeO" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="bZ0-tI-Yi9"/>
+                        <viewControllerLayoutGuide type="bottom" id="UX3-8G-Z4L"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Jmi-i3-vAY">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="H12-WL-igv" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="646" y="461"/>
+        </scene>
+        <!--Dip View Controller-->
+        <scene sceneID="Lgf-SY-hfd">
+            <objects>
+                <viewController storyboardIdentifier="DipViewController" id="5AO-J3-7R4" userLabel="Dip View Controller" customClass="DipViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="JYl-DM-U2W"/>
+                        <viewControllerLayoutGuide type="bottom" id="Xg8-gz-BQL"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="aU0-uz-rHf">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="string" keyPath="dipTag" value="vc"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="4iF-mX-EX6" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="646" y="200"/>
+        </scene>
+        <!--Dip View Controller-->
+        <scene sceneID="AUA-qF-7ky">
+            <objects>
+                <viewController storyboardIdentifier="NilTagViewController" id="fFP-hb-OdS" userLabel="Dip View Controller" customClass="NilTagViewController" customModule="DipTests" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Sio-ii-jPl"/>
+                        <viewControllerLayoutGuide type="bottom" id="bhs-zK-dln"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="4xq-UV-htt">
+                        <rect key="frame" x="0.0" y="0.0" width="200" height="100"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    </view>
+                    <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+                    <size key="freeformSize" width="200" height="100"/>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="nil" keyPath="dipTag"/>
+                    </userDefinedRuntimeAttributes>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="xvW-k9-I9y" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="898" y="200"/>
+        </scene>
+    </scenes>
+</document>
@@ -19,7 +19,7 @@ It's aimed to be as simple as possible yet provide rich functionality usual for

 * You start by creating `let container = DependencyContainer()` and **registering your dependencies, by associating a _protocol_ or _type_ to a `factory`** using `container.register { MyService() as Service }`.
 * Then you can call `container.resolve() as Service` to **resolve an instance of _protocol_ or _type_** using that `DependencyContainer`.
-* You can easily use Dip along with **Storyboards and Nibs** - checkout **[Dip-UI](https://github.com/AliSoftware/Dip-UI)** extensions. There is also a **[code generator](https://github.com/ilyapuchka/dipgen)** that can help to simplify registering new components.
+* You can easily use Dip along with **Storyboards and Nibs** . There is also a **[code generator](https://github.com/ilyapuchka/dipgen)** that can help to simplify registering new components.

 <details>
 <summary>Basic usage</summary>
@@ -148,27 +148,13 @@ File an issue if you have any question. Pull requests are warmly welcome too.

 ## Installation

-Since version 5.0.0 Dip is built with Swift 3.0. You can install Dip using your favorite dependency manager:
+You can install Dip using your favorite dependency manager:

 <details>
 <summary>CocoaPods</summary>

 `pod "Dip"`

-To build for Swift 2.3 add this code to the bottom of your Podfile
-
-```ruby
-post_install do |installer|
-  installer.pods_project.targets.each do |target|
-    target.build_configurations.each do |config|
-      config.build_settings['SWIFT_VERSION'] = '2.3'
-    end
-  end
-end
-```
-
-> You need at least 1.1.0.rc.2 version of CocoaPods.
-
 </details>

 <details>
@@ -279,7 +279,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0700;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 0930;
 				ORGANIZATIONNAME = AliSoftware;
 				TargetAttributes = {
 					0990225E1BC123C000E76F43 = {
@@ -431,12 +431,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -485,12 +487,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "0930"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
@@ -40,9 +40,8 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      codeCoverageEnabled = "YES">
+      codeCoverageEnabled = "YES"
+      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
         <TestableReference
            skipped = "NO">
@@ -71,7 +70,6 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
      launchStyle = "0"
      useCustomWorkingDirectory = "NO"
      ignoresPersistentStateOnLaunch = "NO"
@@ -1,5 +1,15 @@
 {
  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
    {
      "idiom" : "iphone",
      "size" : "29x29",
@@ -31,6 +41,16 @@
      "size" : "60x60",
      "scale" : "3x"
    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
    {
      "idiom" : "ipad",
      "size" : "29x29",
@@ -62,6 +82,16 @@
      "idiom" : "ipad",
      "filename" : "Icon-152.png",
      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
    }
  ],
  "info" : {
@@ -9,7 +9,7 @@
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
+	<string>7.0.0</string>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
@@ -13,7 +13,7 @@ struct DummyStarshipProvider : StarshipProviderAPI {
    var pilotName: String
    
    func fetchIDs(completion: @escaping ([Int]) -> Void) {
-        let nbShips = pilotName.characters.count
+        let nbShips = pilotName.count
        completion(Array(0..<nbShips))
    }
    
@@ -27,8 +27,8 @@ struct SWAPIPersonProvider : PersonProviderAPI {
                guard let results = dict["results"] as? [NSDictionary] else { throw SWAPIError.InvalidJSON }
                
                // Extract URLs (flatten to ignore invalid ones)
-                let urlStrings = results.flatMap({ $0["url"] as? String })
-                let ids = urlStrings.flatMap(idFromURLString)
+                let urlStrings = results.compactMap({ $0["url"] as? String })
+                let ids = urlStrings.compactMap(idFromURLString)
                
                completion(ids)
            }
@@ -61,7 +61,7 @@ struct SWAPIPersonProvider : PersonProviderAPI {
                    hairColor: hairColor,
                    eyeColor: eyeColor,
                    gender: Gender(rawValue: gender),
-                    starshipIDs: starshipURLStrings.flatMap(idFromURLString)
+                    starshipIDs: starshipURLStrings.compactMap(idFromURLString)
                )
                completion(person)
            }
@@ -27,8 +27,8 @@ struct SWAPIStarshipProvider : StarshipProviderAPI {
                guard let results = dict["results"] as? [NSDictionary] else { throw SWAPIError.InvalidJSON }
                
                // Extract URLs (flatten to ignore invalid ones)
-                let urlStrings = results.flatMap({ $0["url"] as? String })
-                let ids = urlStrings.flatMap(idFromURLString)
+                let urlStrings = results.compactMap({ $0["url"] as? String })
+                let ids = urlStrings.compactMap(idFromURLString)
                
                completion(ids)
            }
@@ -59,7 +59,7 @@ struct SWAPIStarshipProvider : StarshipProviderAPI {
                    manufacturer: manufacturer,
                    crew: crew,
                    passengers: passengers,
-                    pilotIDs: pilotIDStrings.flatMap(idFromURLString)
+                    pilotIDs: pilotIDStrings.compactMap(idFromURLString)
                )
                completion(ship)
            }
@@ -9,7 +9,7 @@
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
+	<string>7.0.0</string>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
@@ -256,7 +256,7 @@ public final class InjectedWeak<T>: _InjectedPropertyBox<T>, AutoInjectedPropert

 }

-class _InjectedPropertyBox<T> {
+public class _InjectedPropertyBox<T> {

  let required: Bool
  let didInject: (T) -> ()
@@ -35,10 +35,10 @@ public enum ComponentScope {
   ```
   container.register { ServiceImp() as Service }
   container.register {
-   ServiceConsumerImp(
-   service1: try container.resolve() as Service
-   service2: try container.resolve() as Service
-   ) as ServiceConsumer
+     ServiceConsumerImp(
+       service1: try container.resolve() as Service
+       service2: try container.resolve() as Service
+     ) as ServiceConsumer
   }
   let consumer = container.resolve() as ServiceConsumer
   consumer.service1 !== consumer.service2 //true
@@ -59,10 +59,10 @@ public enum ComponentScope {
   ```
   container.register { ServiceImp() as Service }
   container.register {
-   ServiceConsumerImp(
-   service1: try container.resolve() as Service
-   service2: try container.resolve() as Service
-   ) as ServiceConsumer
+     ServiceConsumerImp(
+       service1: try container.resolve() as Service
+       service2: try container.resolve() as Service
+     ) as ServiceConsumer
   }
   let consumer1 = container.resolve() as ServiceConsumer
   let consumer2 = container.resolve() as ServiceConsumer
@@ -89,10 +89,10 @@ public enum ComponentScope {
   ```
   container.register(.singleton) { ServiceImp() as Service }
   container.register {
-   ServiceConsumerImp(
-   service1: try container.resolve() as Service
-   service2: try container.resolve() as Service
-   ) as ServiceConsumer
+     ServiceConsumerImp(
+       service1: try container.resolve() as Service
+       service2: try container.resolve() as Service
+     ) as ServiceConsumer
   }
   let consumer1 = container.resolve() as ServiceConsumer
   let consumer2 = container.resolve() as ServiceConsumer
@@ -144,7 +144,7 @@ public final class Definition<T, U>: DefinitionType {
  //MARK: - TypeForwardingDefinition
  
  /// Types that can be resolved using this definition.
-  private(set) var implementingTypes: [Any.Type] = [(T?).self, (T!).self]
+  private(set) var implementingTypes: [Any.Type] = [(T?).self]
  
  /// Return `true` if type can be resolved using this definition
  func doesImplements(type aType: Any.Type) -> Bool {
@@ -209,7 +209,7 @@ protocol _Definition: AutoWiringDefinition, TypeForwardingDefinition {
 //MARK: - Type Forwarding

 protocol _TypeForwardingDefinition: _Definition {
-  weak var forwardsTo: _TypeForwardingDefinition? { get }
+  var forwardsTo: _TypeForwardingDefinition? { get }
  var forwardsFrom: [_TypeForwardingDefinition] { get set }
  func _implements(type aType: Any.Type)
  func _implements(types aTypes: [Any.Type])
@@ -50,7 +50,7 @@ public final class DependencyContainer {
  private var _weakCollaborators: [WeakBox<DependencyContainer>] = []
  var _collaborators: [DependencyContainer] {
    get {
-      return _weakCollaborators.flatMap({ $0.value })
+      return _weakCollaborators.compactMap({ $0.value })
    }
    set {
      _weakCollaborators = newValue.filter({ $0 !== self }).map(WeakBox.init)
@@ -303,15 +303,15 @@ extension DependencyContainer {
          collaborator.resolvedInstances = resolvedInstances
          
          for (key, resolvedSingleton) in self.resolvedInstances.singletons {
-            collaborator.resolvedInstances.singletons[aKey] = resolvedSingleton
+            collaborator.resolvedInstances.singletons[key] = resolvedSingleton
          }
-          for (_, resolvedSingleton) in self.resolvedInstances.weakSingletons {
-            guard collaborator.definition(matching: aKey) != nil else { continue }
-            collaborator.resolvedInstances.weakSingletons[aKey] = WeakBox(resolvedSingleton)
+          for (key, resolvedSingleton) in self.resolvedInstances.weakSingletons {
+            guard collaborator.definition(matching: key) == nil else { continue }
+            collaborator.resolvedInstances.weakSingletons[key] = resolvedSingleton is WeakBoxType ? resolvedSingleton :  WeakBox(resolvedSingleton)
          }
-          for (_, resolved) in self.resolvedInstances.resolvedInstances {
-            guard collaborator.definition(matching: aKey) != nil else { continue }
-            collaborator.resolvedInstances.resolvedInstances[aKey] = resolved
+          for (key, resolved) in self.resolvedInstances.resolvedInstances {
+            guard collaborator.definition(matching: key) == nil else { continue }
+            collaborator.resolvedInstances.resolvedInstances[key] = resolved
          }
        }
        
@@ -199,7 +199,7 @@ extension DependencyContainer {
     That happens because when Optional is casted to Any Swift can not implicitly unwrap it with as operator.
     As a workaround we detect boxing here and unwrap it so that we return not a box, but wrapped instance.
     */
-    if let box = resolvedInstance as? BoxType, let unboxed = box.unboxed as? T {
+    if let box = resolvedInstance as? BoxType, let unboxedAny = box.unboxed, let unboxed = unboxedAny as? T {
      resolvedInstance = unboxed
    }
    
@@ -227,7 +227,7 @@ extension DependencyContainer {
  
  private func previouslyResolved<T>(for definition: _Definition, key: DefinitionKey) -> T? {
    //first check if exact key was already resolved
-    if let previouslyResolved = resolvedInstances[key: key, inScope: definition.scope, context: context] as? T {
+    if let previouslyResolved: T = resolvedInstances[key: key, inScope: definition.scope, context: context] {
      return previouslyResolved
    }
    //then check if any related type was already resolved
@@ -235,7 +235,7 @@ extension DependencyContainer {
      DefinitionKey(type: $0, typeOfArguments: key.typeOfArguments, tag: key.tag)
    })
    for key in keys {
-      if let previouslyResolved = resolvedInstances[key: key, inScope: definition.scope, context: context] as? T {
+      if let previouslyResolved: T = resolvedInstances[key: key, inScope: definition.scope, context: context] {
        return previouslyResolved
      }
    }
@@ -280,20 +280,22 @@ class ResolvedInstances {
  }
  var weakSingletons = [DefinitionKey: Any]()
  
-  subscript(key key: DefinitionKey, inScope scope: ComponentScope, context context: DependencyContainer.Context) -> Any? {
+  subscript<T>(key key: DefinitionKey, inScope scope: ComponentScope, context context: DependencyContainer.Context) -> T? {
    get {
+      let instance: Any?
      switch scope {
      case .singleton, .eagerSingleton:
-        return context.inCollaboration ? sharedSingletons[key] : singletons[key]
+        instance = context.inCollaboration ? sharedSingletons[key] : singletons[key]
      case .weakSingleton:
        let singletons = context.inCollaboration ? sharedWeakSingletons : weakSingletons
-        if let boxed = singletons[key] as? WeakBoxType { return boxed.unboxed }
-        else { return singletons[key] }
+        if let boxed = singletons[key] as? WeakBoxType { instance = boxed.unboxed }
+        else { instance = singletons[key] }
      case .shared:
-        return resolvedInstances[key]
+        instance = resolvedInstances[key]
      case .unique:
        return nil
      }
+      return instance.flatMap { $0 as? T }
    }
    set {
      switch scope {
@@ -0,0 +1,245 @@
+//
+// DipUI
+//
+// Copyright (c) 2016 Ilya Puchka <ilyapuchka@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+
+#if (canImport(UIKit) || canImport(AppKit) || canImport(WatchKit)) && !SWIFT_PACKAGE
+
+extension DependencyContainer {
+  ///Containers that will be used to resolve dependencies of instances, created by stroyboards.
+  static public var uiContainers: [DependencyContainer] = {
+    #if os(watchOS)
+      swizzleAwakeWithContext
+    #endif
+    return []
+  }()
+  
+  /**
+   Resolves dependencies of passed in instance.
+   Use this method to resolve dependencies of object created by storyboard.
+   The type of the instance should be registered in the container.
+   
+   You should call this method only from implementation of `didInstantiateFromStoryboard(_:tag:)`
+   of `StoryboardInstantiatable` protocol if you override its default implementation.
+   
+   This method will do the same as `resolve(tag:) as T`, but instead of creating 
+   a new intance with a registered factory it will use passed in instance as a resolved instance.
+   
+   - parameters:
+      - instance: The object which dependencies should be resolved
+      - tag: An optional tag used to register the type (`T`) in the container
+   
+   **Example**:
+   
+   ```swift
+   class ViewController: UIViewController, ServiceDelegate, StoryboardInstantiatable {
+     var service: Service?
+
+     func didInstantiateFromStoryboard(_ container: DependencyContainer, tag: DependencyContainer.Tag?) throws {
+       try container.resolveDependencies(of: self as ServiceDelegate, tag: "vc")
+     }
+   }
+   
+   class ServiceImp: Service {
+     weak var delegate: ServiceDelegate?
+   }
+   
+   container.register(tag: "vc") { ViewController() }
+     .resolvingProperties { container, controller in
+       controller.service = try container.resolve() as Service
+       controller.service.delegate = controller
+     }
+   
+   container.register { ServiceImp() as Service }
+   ```
+   
+   - seealso: `register(_:type:tag:factory:)`, `didInstantiateFromStoryboard(_:tag:)`
+   
+   */
+  public func resolveDependencies<T>(of instance: T, tag: Tag? = nil) throws {
+    _ = try resolve(tag: tag) { (_: () throws -> T) in instance }
+  }
+  
+  /**
+   Register storyboard type `T` which has to conform to `StoryboardInstantiatable` and associate it with an optional tag.
+   
+   - parameters:
+      - type: Storyboard type to register definition for.
+      - tag: The arbitrary tag to associate this factory with. Pass `nil` to associate with any tag. Default value is `nil`.
+   
+   - returns: A registered definition.
+   
+   - note: This method will register concrete types. If you need to register 
+           as abstract types you should use standard `register` method from Dip.
+           You should cast the factory return type to the protocol you want to 
+           register it for (unless you want to register concrete type) or 
+           provide `type` parameter.
+   
+   - seealso: `Definition`, `ComponentScope`, `DependencyTagConvertible`
+   
+   **Example**:
+   ```swift
+   // Register MyViewController
+   container.register(storyboardType: MyViewController.self)
+   // or
+   container.register(tag: "myVC") { MyViewController() as MyViewControllerType }
+   ```
+   */
+  public func register<T: NSObject>(storyboardType type: T.Type, tag: DependencyTagConvertible? = nil) -> Dip.Definition<T, ()> where T: StoryboardInstantiatable {
+    return register(.unique, type: type, tag: tag, factory: { T() })
+  }
+
+}
+
+#if os(watchOS)
+  public protocol StoryboardInstantiatableType {}
+#else
+  public typealias StoryboardInstantiatableType = NSObjectProtocol
+#endif
+
+public protocol StoryboardInstantiatable: StoryboardInstantiatableType {
+
+  /**
+   This method will be called if you set a `dipTag` attirbute on the object in a storyboard
+   that conforms to `StoryboardInstantiatable` protocol.
+   
+   - parameters:
+      - tag: The tag value, that was set on the object in a storyboard
+      - container: The `DependencyContainer` associated with storyboards
+   
+   The type that implements `StoryboardInstantiatable` protocol should be registered in `UIStoryboard.container`.
+   Default implementation of that method calls `resolveDependenciesOf(_:tag:)`
+   and pass it `self` instance and the tag.
+   
+   Usually you will not need to override the default implementation of this method
+   if you registered the type of the instance as a concrete type in the container.
+   Then you only need to add conformance to `StoryboardInstantiatable`.
+   
+   You may want to override it if you want to add custom logic before/after resolving dependencies
+   or you want to resolve the instance as implementation of some protocol which it conforms to.
+   
+   - warning: This method will be called after `init?(coder:)` but before `awakeFromNib` method of `NSObject`.
+              On watchOS this method will be called before `awakeWithContext(_:)`.
+   
+   **Example**:
+   
+   ```swift
+   extension MyViewController: SomeProtocol { ... }
+   
+   extension MyViewController: StoryboardInstantiatable {
+     func didInstantiateFromStoryboard(_ container: DependencyContainer, tag: DependencyContainer.Tag) throws {
+       //resolve dependencies of the instance as SomeProtocol type
+       try container.resolveDependencies(of: self as SomeProtocol, tag: tag)
+       //do some additional setup here
+     }
+   }
+   ```
+  */
+  func didInstantiateFromStoryboard(_ container: DependencyContainer, tag: DependencyContainer.Tag?) throws
+  
+}
+
+extension StoryboardInstantiatable {
+  public func didInstantiateFromStoryboard(_ container: DependencyContainer, tag: DependencyContainer.Tag?) throws {
+    try container.resolveDependencies(of: self, tag: tag)
+  }
+}
+
+#if os(iOS) || os(tvOS) || os(OSX)
+  
+#if os(iOS) || os(tvOS)
+  import UIKit
+#elseif os(OSX)
+  import AppKit
+#endif
+  
+let DipTagAssociatedObjectKey = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
+
+extension NSObject {
+  
+  ///A string tag that will be used to resolve dependencies of this instance
+  ///if it implements `StoryboardInstantiatable` protocol.
+  @objc private(set) public var dipTag: String? {
+    get {
+      return objc_getAssociatedObject(self, DipTagAssociatedObjectKey) as? String
+    }
+    set {
+      objc_setAssociatedObject(self, DipTagAssociatedObjectKey, newValue, .OBJC_ASSOCIATION_COPY_NONATOMIC)
+      guard let instantiatable = self as? StoryboardInstantiatable else { return }
+      
+      let tag = dipTag.map(DependencyContainer.Tag.String)
+      
+      for (index, container) in DependencyContainer.uiContainers.enumerated() {
+        do {
+          log("Trying to resolve \(type(of: self)) with UI container at index \(index)")
+          try instantiatable.didInstantiateFromStoryboard(container, tag: tag)
+          log("Resolved \(type(of: self))")
+          return
+        } catch { }
+      }
+    }
+  }
+  
+}
+  
+func log(_ message: Any) {
+  if Dip.LogLevel.Errors.rawValue <= Dip.logLevel.rawValue {
+    Dip.logger(logLevel, message)
+  }
+}
+
+#else
+import WatchKit
+  
+let swizzleAwakeWithContext: Void = {
+  let originalSelector = #selector(WKInterfaceController.awake(withContext:))
+  let swizzledSelector = #selector(WKInterfaceController.dip_awake(withContext:))
+  
+  guard let originalMethod = class_getInstanceMethod(WKInterfaceController.self, originalSelector),
+    let swizzledMethod = class_getInstanceMethod(WKInterfaceController.self, swizzledSelector) else { return }
+  
+  let didAddMethod = class_addMethod(WKInterfaceController.self, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))
+  
+  if didAddMethod {
+    class_replaceMethod(WKInterfaceController.self, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
+  } else {
+    method_exchangeImplementations(originalMethod, swizzledMethod)
+  }
+}()
+  
+extension WKInterfaceController: StoryboardInstantiatableType {
+
+  @objc func dip_awake(withContext context: AnyObject?) {
+    defer { self.dip_awake(withContext: context) }
+    guard let instantiatable = self as? StoryboardInstantiatable else { return }
+    
+    for container in DependencyContainer.uiContainers {
+      guard let _ = try? instantiatable.didInstantiateFromStoryboard(container, tag: nil) else { continue }
+      break
+    }
+  }
+  
+}
+
+#endif
+
+#endif
@@ -48,11 +48,6 @@ extension Optional: BoxType {
  }
 }

-extension ImplicitlyUnwrappedOptional: BoxType {
-  var unboxed: Any? {
-    return self ?? nil
-  }
-}

 class Box<T> {
  var unboxed: T
@@ -26,7 +26,7 @@ import XCTest
@testable import Dip

 private protocol Server: class {
-  weak var client: Client! {get}
+  var client: Client! {get}
  var anotherClient: Client! {get set}
 }

@@ -47,7 +47,7 @@ private class ServerImp: Server {
  
  weak var anotherClient: Client!
  
-  weak var _optionalProperty = InjectedWeak<AnyObject>(required: false)
+  var _optionalProperty = InjectedWeak<AnyObject>(required: false)
 }

 private class ClientImp: Client {
@@ -467,17 +467,9 @@ class AutoWiringTests: XCTestCase {
    AssertNoThrow(expression: resolved = try container.resolve() as AutoWiredClient?)
    XCTAssertNotNil(resolved)
    
-    //when
-    AssertNoThrow(expression: resolved = try container.resolve() as AutoWiredClient!)
-    XCTAssertNotNil(resolved)
-
    //when
    AssertNoThrow(expression: resolved = try container.resolve(tag: "tag") as AutoWiredClient?)
    XCTAssertNotNil(resolved)
-    
-    //when
-    AssertNoThrow(expression: resolved = try container.resolve(tag: "tag") as AutoWiredClient!)
-    XCTAssertNotNil(resolved)
  }
  
 }
@@ -301,23 +301,17 @@ class ComponentScopeTests: XCTestCase {
  
  func testThatItReusesResolvedInstanceWhenResolvingOptional() {
    var otherService: Service!
-    var impOtherService: Service!
    var anyOtherService: Any!
-    var anyImpOtherService: Any!
-    
+
    container.register { ServiceImp1() as Service }
      .resolvingProperties { container, service in
        otherService = try! container.resolve() as Service?
-        impOtherService = try! container.resolve() as Service!
        anyOtherService = try! container.resolve((Service?).self)
-        anyImpOtherService = try! container.resolve((Service!).self)
    }
    
    let service = try! container.resolve() as Service
    XCTAssertTrue(otherService as! ServiceImp1 === service as! ServiceImp1)
-    XCTAssertTrue(impOtherService as! ServiceImp1 === service as! ServiceImp1)
    XCTAssertTrue(anyOtherService as! ServiceImp1 === service as! ServiceImp1)
-    XCTAssertTrue(anyImpOtherService as! ServiceImp1 === service as! ServiceImp1)
  }
  
  func testThatItHoldsWeakReferenceToWeakSingletonInstance() {
@@ -116,7 +116,6 @@ class DefinitionTests: XCTestCase {
    let def = Definition<Service, ()>(scope: .unique) { ServiceImp() as Service }
    
    XCTAssertTrue(def.implementingTypes.contains(where: { $0 == Service?.self }))
-    XCTAssertTrue(def.implementingTypes.contains(where: { $0 == Service!.self }))
  }
  
 }
@@ -30,7 +30,7 @@ private class ServiceImp1: Service { }
 private class ServiceImp2: Service { }

 private protocol Server: class {
-  weak var client: Client! { get }
+  var client: Client! { get }
 }
 private protocol Client: class {
  var server: Server! { get }
@@ -70,6 +70,7 @@ class DipTests: XCTestCase {
      ("testThatCollaboratingWithSelfIsIgnored", testThatCollaboratingWithSelfIsIgnored),
      ("testThatCollaboratingContainersAreWeakReferences", testThatCollaboratingContainersAreWeakReferences),
      ("testThatCollaboratingContainersReuseInstancesResolvedByAnotherContainer", testThatCollaboratingContainersReuseInstancesResolvedByAnotherContainer),
+      ("testThatItCanHandleSeparateContainersAndTheirCollaboration", testThatItCanHandleSeparateContainersAndTheirCollaboration)
    ]
  }()

@@ -123,12 +124,6 @@ class DipTests: XCTestCase {
    
    //then
    XCTAssertTrue(optService is ServiceImp1)
-    
-    //and when
-    let impService = try! container.resolve((Service!).self)
-    
-    //then
-    XCTAssertTrue(impService is ServiceImp1)
  }
  
  func testThatItResolvesInstanceRegisteredWithTag() {
@@ -152,12 +147,6 @@ class DipTests: XCTestCase {
    
    //then
    XCTAssertTrue(optService is ServiceImp1)
-    
-    //and when
-    let impService = try! container.resolve((Service!).self, tag: "service")
-    
-    //then
-    XCTAssertTrue(impService is ServiceImp1)
  }
  
  func testThatItResolvesDifferentInstancesRegisteredForDifferentTags() {
@@ -188,14 +177,6 @@ class DipTests: XCTestCase {
    //then
    XCTAssertTrue(optService1 is ServiceImp1)
    XCTAssertTrue(optService2 is ServiceImp2)
-  
-    //and when
-    let impService1 = try! container.resolve((Service!).self, tag: "service1")
-    let impService2 = try! container.resolve((Service!).self, tag: "service2")
-    
-    //then
-    XCTAssertTrue(impService1 is ServiceImp1)
-    XCTAssertTrue(impService2 is ServiceImp2)
  }
  
  func testThatNewRegistrationOverridesPreviousRegistration() {
@@ -241,12 +222,6 @@ class DipTests: XCTestCase {
    XCTAssertTrue(resolveDependenciesCalled)

    resolveDependenciesCalled = false
-    
-    //and when
-    let _ = try! container.resolve((Service!).self)
-    
-    //then
-    XCTAssertTrue(resolveDependenciesCalled)
  }
  
  func testThatItThrowsErrorIfCanNotFindDefinitionForType() {
@@ -829,5 +804,55 @@ extension DipTests {
    XCTAssertEqual(client2.name, "2")
    XCTAssertTrue(client1.service === client2.service)
  }
-
+}
+
+class Manager {}
+class AnotherManager {}
+
+class Object {
+  let manager: Manager?
+  
+  init(with container: DependencyContainer) {
+    self.manager = try? container.resolve()
+  }
+}
+
+class Owner {
+  var manager: Manager?
+}
+
+extension DipTests {
+  func testThatItCanHandleSeparateContainersAndTheirCollaboration() {
+    let container = self.container
+    
+    let anotherContainer = DependencyContainer()
+    anotherContainer.register { Object(with: anotherContainer) }
+    
+    container.collaborate(with: anotherContainer)
+    
+    container
+      .register { Owner() }
+      .resolvingProperties { $1.manager = try $0.resolve() }
+    
+    container.register(.singleton) { AnotherManager() }
+    container.register(.singleton) { Manager() }
+    
+    let manager: Manager? = try? container.resolve()
+    let another: AnotherManager? = try? container.resolve()
+    var owner: Owner? = try? container.resolve(arguments: 1, "")
+    
+    let object: Object? = try? container.resolve()
+    owner = try? container.resolve()
+    
+    let nonNilValues: [Any?] = [another, manager, owner, object, object?.manager]
+    nonNilValues.forEach { XCTAssertNotNil($0) }
+    
+    XCTAssertTrue(
+      owner?.manager
+        .flatMap { value in
+          manager.flatMap { $0 === value }
+        }
+        ?? false
+    )
+  }
 }
@@ -0,0 +1,252 @@
+//
+// DipUI
+//
+// Copyright (c) 2016 Ilya Puchka <ilyapuchka@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+
+#if (canImport(UIKit) || canImport(AppKit)) && !SWIFT_PACKAGE
+
+import XCTest
+@testable import Dip
+
+#if canImport(UIKit)
+  import UIKit
+  typealias Storyboard = UIStoryboard
+  typealias ViewController = UIViewController
+  typealias StoryboardName = String
+  
+  extension UIStoryboard {
+    @nonobjc
+    @discardableResult func instantiateViewControllerWithIdentifier(_ identifier: String) -> UIViewController {
+      return instantiateViewController(withIdentifier: identifier)
+    }
+  }
+
+#else
+  import AppKit
+  typealias Storyboard = NSStoryboard
+  typealias ViewController = NSViewController
+  typealias StoryboardName = NSStoryboard.Name
+  
+  extension NSStoryboard {
+    @discardableResult func instantiateViewControllerWithIdentifier(_ identifier: String) -> NSViewController {
+      return instantiateController(withIdentifier: NSStoryboard.SceneIdentifier(identifier)) as! NSViewController
+    }
+  }
+  
+#endif
+
+#if os(iOS)
+  let storyboardName: StoryboardName = "UIStoryboard"
+#elseif os(tvOS)
+  let storyboardName: StoryboardName = "TVStoryboard"
+#else
+  let storyboardName: StoryboardName = StoryboardName("NSStoryboard")
+#endif
+
+class DipViewController: ViewController, StoryboardInstantiatable {}
+class NilTagViewController: ViewController, StoryboardInstantiatable {}
+
+class DipUITests: XCTestCase {
+  
+  let storyboard: Storyboard = {
+    let bundle = Bundle(for: DipUITests.self)
+    return Storyboard(name: storyboardName, bundle: bundle)
+  }()
+  
+  func testThatViewControllerHasDipTagProperty() {
+    let viewController = storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+    XCTAssertEqual(viewController.dipTag, "vc")
+  }
+  
+  func testThatItDoesNotResolveIfContainerIsNotSet() {
+    let container = DependencyContainer()
+    container.register(tag: "vc") { ViewController() }
+      .resolvingProperties { _, _ in
+        XCTFail("Should not resolve when container is not set.")
+    }
+    
+    storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+  }
+  
+  func testThatItDoesNotResolveIfTagIsNotSet() {
+    let container = DependencyContainer()
+    container.register(tag: "vc") { ViewController() }
+      .resolvingProperties { _, _ in
+        XCTFail("Should not resolve when container is not set.")
+    }
+    
+    DependencyContainer.uiContainers = [container]
+    storyboard.instantiateViewControllerWithIdentifier("ViewController")
+  }
+
+  func testThatItResolvesIfContainerAndStringTagAreSet() {
+    var resolved = false
+    let container = DependencyContainer()
+    container.register(storyboardType: DipViewController.self, tag: "vc")
+      .resolvingProperties { _, _ in
+        resolved = true
+    }
+    
+    DependencyContainer.uiContainers = [container]
+    storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+    XCTAssertTrue(resolved, "Should resolve when container and tag are set.")
+  }
+
+  func testThatItResolvesIfContainerAndNilTagAreSet() {
+    var resolved = false
+    let container = DependencyContainer()
+    container.register(storyboardType: NilTagViewController.self)
+      .resolvingProperties { _, _ in
+        resolved = true
+    }
+    
+    DependencyContainer.uiContainers = [container]
+    storyboard.instantiateViewControllerWithIdentifier("NilTagViewController")
+    XCTAssertTrue(resolved, "Should resolve when container and nil tag are set.")
+  }
+
+  func testThatItDoesNotResolveIfTagDoesNotMatch() {
+    let container = DependencyContainer()
+    container.register(storyboardType: DipViewController.self, tag: "wrong tag")
+      .resolvingProperties { _, _ in
+        XCTFail("Should not resolve when container is not set.")
+    }
+    
+    DependencyContainer.uiContainers = [container]
+    storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+  }
+  
+  func testThatItResolvesWithDefinitionWithNoTag() {
+    var resolved = false
+    let container = DependencyContainer()
+    container.register(storyboardType: DipViewController.self)
+      .resolvingProperties { _, _ in
+        resolved = true
+    }
+    
+    DependencyContainer.uiContainers = [container]
+    storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+    XCTAssertTrue(resolved, "Should fallback to definition with no tag.")
+  }
+  
+  func testThatItIteratesUIContainers() {
+    var resolved = false
+    let container1 = DependencyContainer()
+    let container2 = DependencyContainer()
+    container2.register(storyboardType: DipViewController.self, tag: "vc")
+      .resolvingProperties { container, _ in
+        XCTAssertTrue(container === container2)
+        resolved = true
+    }
+    
+    DependencyContainer.uiContainers = [container1, container2]
+    storyboard.instantiateViewControllerWithIdentifier("DipViewController")
+    XCTAssertTrue(resolved, "Should resolve using second container")
+  }
+}
+
+protocol SomeService: class {
+  var delegate: SomeServiceDelegate? { get set }
+}
+protocol SomeServiceDelegate: class { }
+class SomeServiceImp: SomeService {
+  weak var delegate: SomeServiceDelegate?
+  init(delegate: SomeServiceDelegate) {
+    self.delegate = delegate
+  }
+  init(){}
+}
+
+protocol OtherService: class {
+  var delegate: OtherServiceDelegate? { get set }
+}
+protocol OtherServiceDelegate: class {}
+class OtherServiceImp: OtherService {
+  weak var delegate: OtherServiceDelegate?
+  init(delegate: OtherServiceDelegate){
+    self.delegate = delegate
+  }
+  init(){}
+}
+
+
+protocol SomeScreen: class {
+  var someService: SomeService? { get set }
+  var otherService: OtherService? { get set }
+}
+
+class ViewControllerImp: SomeScreen, SomeServiceDelegate, OtherServiceDelegate {
+  var someService: SomeService?
+  var otherService: OtherService?
+  init(){}
+}
+
+extension DipUITests {
+  
+  func testThatItDoesNotCreateNewInstanceWhenResolvingDependenciesOfExternalInstance() {
+    let container = DependencyContainer()
+    
+    //given
+    var factoryCalled = false
+    container.register(.shared) { () -> SomeScreen in
+      factoryCalled = true
+      return ViewControllerImp() as SomeScreen
+    }
+    
+    //when
+    let screen = ViewControllerImp()
+    try! container.resolveDependencies(of: screen as SomeScreen)
+    
+    //then
+    XCTAssertFalse(factoryCalled, "Container should not create new instance when resolving dependencies of external instance.")
+  }
+  
+  func testThatItResolvesInstanceThatImplementsSeveralProtocols() {
+    let container = DependencyContainer()
+
+    //given
+    container.register(.shared) { ViewControllerImp() as SomeScreen }
+      .resolvingProperties { container, resolved in
+        
+        //manually provide resolved instance for the delegate properties
+        resolved.someService = try container.resolve() as SomeService
+        resolved.someService?.delegate = resolved as? SomeServiceDelegate
+        resolved.otherService = try container.resolve(arguments: resolved as! OtherServiceDelegate) as OtherService
+    }
+    
+    container.register(.shared) { SomeServiceImp() as SomeService }
+    container.register(.shared) { OtherServiceImp(delegate: $0) as OtherService }
+    
+    //when
+    let screen = try! container.resolve() as SomeScreen
+    
+    //then
+    XCTAssertNotNil(screen.someService)
+    XCTAssertNotNil(screen.otherService)
+    
+    XCTAssertTrue(screen.someService?.delegate === screen)
+    XCTAssertTrue(screen.otherService?.delegate === screen)
+  }
+  
+}
+
+#endif
@@ -30,6 +30,25 @@ private protocol ForwardedType: class { }
 private class ServiceImp1: NSObject, Service, ForwardedType { }
 private class ServiceImp2: NSObject, Service, ForwardedType { }

+private protocol Dependency {}
+private struct DependencyImpl: Dependency {}
+private class DependencyRefImpl: Dependency {}
+
+private struct DependencyClient {
+  let dep: Dependency
+  init(dependency: Dependency) {
+    self.dep = dependency
+  }
+}
+
+private struct OptionalDependencyClient {
+  let dep: Dependency?
+  init(dependency: Dependency?) {
+    self.dep = dependency
+  }
+}
+
+
 class TypeForwardingTests: XCTestCase {
  
  let container = DependencyContainer()
@@ -44,6 +63,7 @@ class TypeForwardingTests: XCTestCase {
      ("testThatItCallsResolvedDependenciesBlockProvidedAfterRegistrationWhenResolvingByTypeForwarding",testThatItCallsResolvedDependenciesBlockProvidedAfterRegistrationWhenResolvingByTypeForwarding),
      ("testThatItFallbackToDefinitionWithNoTagWhenResolvingInstanceByTypeForwarding", testThatItFallbackToDefinitionWithNoTagWhenResolvingInstanceByTypeForwarding),
      ("testThatItCanResolveOptional", testThatItCanResolveOptional),
+      ("testThatItReusesInstancesResolvedForOptionalType", testThatItReusesInstancesResolvedForOptionalType),
      ("testThatItFirstUsesTaggedDefinitionWhenResolvingOptional", testThatItFirstUsesTaggedDefinitionWhenResolvingOptional),
      ("testThatItThrowsErrorWhenResolvingNotImplementedTypeWithTypeForwarding", testThatItThrowsErrorWhenResolvingNotImplementedTypeWithTypeForwarding),
      ("testThatItOverridesIfSeveralDefinitionsWithTheSameTagForwardTheSameType", testThatItOverridesIfSeveralDefinitionsWithTheSameTagForwardTheSameType),
@@ -252,6 +272,35 @@ class TypeForwardingTests: XCTestCase {
    XCTAssertTrue(object is ServiceImp1)
    XCTAssertTrue(anyObject is ServiceImp1)
  }
+
+  func testThatItReusesInstancesResolvedForOptionalType() {
+    var alreadyResolved = false
+    container.register(.singleton) { () -> Dependency in
+      XCTAssertFalse(alreadyResolved)
+      return DependencyImpl() as Dependency
+    }
+    container.register() { DependencyClient(dependency: try! self.container.resolve()) }
+    container.register() { OptionalDependencyClient(dependency: try! self.container.resolve()) }
+
+    let _ = try! container.resolve() as OptionalDependencyClient
+    let _ = try! container.resolve() as DependencyClient
+
+    alreadyResolved = false
+
+    let _ = try! container.resolve() as DependencyClient
+    let _ = try! container.resolve() as OptionalDependencyClient
+
+    container.register(.singleton) { () -> Dependency in
+      XCTAssertFalse(alreadyResolved)
+      return DependencyRefImpl() as Dependency
+    }
+
+    let client1 = try! container.resolve() as DependencyClient
+    let client2 = try! container.resolve() as OptionalDependencyClient
+
+    XCTAssertTrue(client1.dep as! DependencyRefImpl === client2.dep as! DependencyRefImpl)
+  }
+
  
  func testThatItFirstUsesTaggedDefinitionWhenResolvingOptional() {
    let expectedTag: DependencyContainer.Tag = .String("tag")
Author	SHA1	Message	Date
Ilya Puchka	c5c6bd2821	Merge branch 'master' into develop	2018-09-22 23:20:46 +03:00
Ilya Puchka	593129c63e	update cocoapods on travis	2018-09-22 20:47:45 +01:00
Ilya Puchka	9a8d919a13	bump xcode and swift version on travis	2018-09-22 20:16:49 +01:00
Ilya Puchka	17a2d64361	bumped version to 7.0.0	2018-09-22 20:16:49 +01:00
Ilya Puchka	27037c2dd7	fix indentation in some docs	2018-09-22 20:01:16 +01:00
Ilya Puchka	bd253f4b0a	bump xcode and swift version on travis	2018-09-22 19:48:10 +01:00
Ilya Puchka	882b2a2031	bumped version to 7.0	2018-09-22 19:25:18 +01:00
Ilya Puchka	6a14c1f96d	updated CHANGELOG	2018-09-22 19:24:00 +01:00
Ilya Puchka	f60e322445	bumped swift version, removed unneded IUO tests	2018-09-22 19:19:45 +01:00
Ilya Puchka	77f6fde2fa	Merge branch 'swift42' into develop	2018-09-22 19:16:27 +01:00
Ilya Puchka	a8f7a2972a	silence warning	2018-09-22 19:15:43 +01:00
Ilya Puchka	ce9088afc7	fix reusing optionals	2018-09-22 18:47:34 +01:00
Ilya Puchka	ef563c65ba	fix build error on mac with SPM	2018-09-19 16:46:31 +03:00
Ilya Puchka	90ff39c720	fix build error on mac with SPM	2018-09-19 15:13:22 +03:00
Ilya Puchka	e45dbd634f	Merge with DipUI (#206 ) * merge with DipUI	2018-09-19 15:02:26 +03:00
Bruno Virlet	f81c267c61	Disable gathering code coverage (#198 ) This causes issues whenn linking as a static library using Carthage	2018-07-25 18:10:51 +01:00
Michele Gruppioni	d5b07b1916	Removed extension of ImplicitlyUnwrappedOptional (#191 ) * Removed extension of ImplicitlyUnwrappedOptional It was deprecated and has been removed in swift 4.2 * Added Swift Version Check	2018-07-13 11:43:40 +01:00
Ilya Puchka	33993df68a	disable test coverage	2018-06-06 21:08:44 +01:00
Ilya Puchka	dadb68862a	fixed getting resolved instances	2018-06-06 01:15:08 +01:00
Ilya Puchka	2e53aa8ae2	Merge pull request #190 from AliSoftware/develop Release 6.1	2018-04-28 20:24:35 +01:00
Ilya Puchka	142a348b20	removed unneded builds from travis	2018-04-28 20:05:53 +01:00
Ilya Puchka	88f101639d	updated travis config	2018-04-28 19:48:03 +01:00
Ilya Puchka	5e70633ece	bumped swift version to 4.1	2018-04-28 19:43:49 +01:00
Ilya Puchka	af57aa26ed	bumped version to 6.1	2018-04-28 19:41:45 +01:00
Ilya Puchka	6d6d77d603	fixed swift 4.1 warnings	2018-04-28 19:39:46 +01:00
Ilya Puchka	8d2f6ab8fb	Revert #171 (#189 ) * Revert "fix merge conflict" This reverts commit `aff01c541b`. * Revert "Merge branch 'develop' into develop" This reverts commit `a8dd47cee5`, reversing changes made to `9e7bd51bcd`.	2018-04-28 19:21:05 +01:00
Ilya Puchka	2cc5310d4b	Merge pull request #182 from tapsandswipes/develop Fix crash with colaborator containers and weak singletons	2018-02-26 13:25:17 +00:00
Antonio Cabezuelo Vivo	5cb03a11bb	Fix crash with colaborator containers and weak singletons Signed-off-by: Antonio Cabezuelo Vivo <antonio@tapsandswipes.com>	2018-02-12 14:17:31 +01:00
Ilya Puchka	aff01c541b	fix merge conflict	2017-12-12 16:56:23 +01:00
Ilya Puchka	a8dd47cee5	Merge branch 'develop' into develop	2017-12-12 16:51:32 +01:00
Ilya Puchka	12738a665f	Merge pull request #171 from creditkarma/parent_child_containers Parent child container support for Dip	2017-12-12 16:33:32 +01:00
Oleksa 'trimm' Korin	9e7bd51bcd	Restructured tests, fixed crash	2017-10-30 23:49:44 +02:00
Oleksa 'trimm' Korin	ce394e7d2b	Added reproduction test	2017-10-30 23:26:36 +02:00
Oleksa 'trimm' Korin	cd2c66f4a8	Initial try for collaboration reproduction crash	2017-10-30 20:45:51 +02:00
Ilya Puchka	5464f00bad	Merge pull request #177 from AliSoftware/release/6.0 Release 6.0	2017-10-09 18:12:39 +02:00
John Twigg	3429c6ae0b	Parent child container support for Dip	2017-08-02 10:41:03 -07:00
@@ -1 +1 @@
 
 .2