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SwiftMysterious
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‎SwiftMysterious/SwiftMysterious.xcodeproj/project.pbxproj‎

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// !$*UTF8*$!
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{
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archiveVersion = 1;
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classes = {
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};
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objectVersion = 46;
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objects = {
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/* Begin PBXBuildFile section */
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9B71F0681C5B8A020002C59D /* main.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B71F0671C5B8A020002C59D /* main.swift */; };
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9B71F06F1C5B8F8E0002C59D /* InlineLazy.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B71F06E1C5B8F8E0002C59D /* InlineLazy.swift */; };
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9B71F0711C5BA1620002C59D /* SpecialLiteral.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B71F0701C5BA1620002C59D /* SpecialLiteral.swift */; };
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9B71F0731C5BA38E0002C59D /* LoopLabel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B71F0721C5BA38E0002C59D /* LoopLabel.swift */; };
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/* End PBXBuildFile section */
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/* Begin PBXCopyFilesBuildPhase section */
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9B71F0621C5B8A020002C59D /* CopyFiles */ = {
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isa = PBXCopyFilesBuildPhase;
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buildActionMask = 2147483647;
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dstPath = /usr/share/man/man1/;
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dstSubfolderSpec = 0;
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files = (
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);
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runOnlyForDeploymentPostprocessing = 1;
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};
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/* End PBXCopyFilesBuildPhase section */
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/* Begin PBXFileReference section */
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9B71F0641C5B8A020002C59D /* SwiftMysterious */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = SwiftMysterious; sourceTree = BUILT_PRODUCTS_DIR; };
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9B71F0671C5B8A020002C59D /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
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9B71F06E1C5B8F8E0002C59D /* InlineLazy.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = InlineLazy.swift; sourceTree = "<group>"; };
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9B71F0701C5BA1620002C59D /* SpecialLiteral.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SpecialLiteral.swift; sourceTree = "<group>"; };
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9B71F0721C5BA38E0002C59D /* LoopLabel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LoopLabel.swift; sourceTree = "<group>"; };
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/* End PBXFileReference section */
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/* Begin PBXFrameworksBuildPhase section */
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9B71F0611C5B8A020002C59D /* Frameworks */ = {
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isa = PBXFrameworksBuildPhase;
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buildActionMask = 2147483647;
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files = (
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);
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runOnlyForDeploymentPostprocessing = 0;
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};
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/* End PBXFrameworksBuildPhase section */
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/* Begin PBXGroup section */
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9B71F05B1C5B8A020002C59D = {
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isa = PBXGroup;
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children = (
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9B71F0661C5B8A020002C59D /* SwiftMysterious */,
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9B71F0651C5B8A020002C59D /* Products */,
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);
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sourceTree = "<group>";
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};
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9B71F0651C5B8A020002C59D /* Products */ = {
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isa = PBXGroup;
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children = (
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9B71F0641C5B8A020002C59D /* SwiftMysterious */,
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);
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name = Products;
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sourceTree = "<group>";
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};
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9B71F0661C5B8A020002C59D /* SwiftMysterious */ = {
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isa = PBXGroup;
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children = (
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9B71F0671C5B8A020002C59D /* main.swift */,
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9B71F06E1C5B8F8E0002C59D /* InlineLazy.swift */,
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9B71F0701C5BA1620002C59D /* SpecialLiteral.swift */,
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9B71F0721C5BA38E0002C59D /* LoopLabel.swift */,
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);
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path = SwiftMysterious;
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sourceTree = "<group>";
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};
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/* End PBXGroup section */
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/* Begin PBXNativeTarget section */
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9B71F0631C5B8A020002C59D /* SwiftMysterious */ = {
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isa = PBXNativeTarget;
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buildConfigurationList = 9B71F06B1C5B8A020002C59D /* Build configuration list for PBXNativeTarget "SwiftMysterious" */;
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buildPhases = (
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9B71F0601C5B8A020002C59D /* Sources */,
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9B71F0611C5B8A020002C59D /* Frameworks */,
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9B71F0621C5B8A020002C59D /* CopyFiles */,
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);
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buildRules = (
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);
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dependencies = (
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);
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name = SwiftMysterious;
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productName = SwiftMysterious;
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productReference = 9B71F0641C5B8A020002C59D /* SwiftMysterious */;
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productType = "com.apple.product-type.tool";
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};
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/* End PBXNativeTarget section */
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/* Begin PBXProject section */
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9B71F05C1C5B8A020002C59D /* Project object */ = {
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isa = PBXProject;
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attributes = {
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LastSwiftUpdateCheck = 0720;
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LastUpgradeCheck = 0720;
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ORGANIZATIONNAME = zxy;
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TargetAttributes = {
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9B71F0631C5B8A020002C59D = {
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CreatedOnToolsVersion = 7.2;
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};
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};
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};
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buildConfigurationList = 9B71F05F1C5B8A020002C59D /* Build configuration list for PBXProject "SwiftMysterious" */;
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compatibilityVersion = "Xcode 3.2";
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developmentRegion = English;
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hasScannedForEncodings = 0;
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knownRegions = (
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en,
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);
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mainGroup = 9B71F05B1C5B8A020002C59D;
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productRefGroup = 9B71F0651C5B8A020002C59D /* Products */;
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projectDirPath = "";
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projectRoot = "";
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targets = (
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9B71F0631C5B8A020002C59D /* SwiftMysterious */,
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);
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};
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/* End PBXProject section */
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/* Begin PBXSourcesBuildPhase section */
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9B71F0601C5B8A020002C59D /* Sources */ = {
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isa = PBXSourcesBuildPhase;
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buildActionMask = 2147483647;
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files = (
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9B71F0731C5BA38E0002C59D /* LoopLabel.swift in Sources */,
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9B71F06F1C5B8F8E0002C59D /* InlineLazy.swift in Sources */,
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9B71F0681C5B8A020002C59D /* main.swift in Sources */,
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9B71F0711C5BA1620002C59D /* SpecialLiteral.swift in Sources */,
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);
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runOnlyForDeploymentPostprocessing = 0;
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};
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/* End PBXSourcesBuildPhase section */
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/* Begin XCBuildConfiguration section */
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9B71F0691C5B8A020002C59D /* Debug */ = {
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isa = XCBuildConfiguration;
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buildSettings = {
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ALWAYS_SEARCH_USER_PATHS = NO;
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CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
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CLANG_CXX_LIBRARY = "libc++";
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CLANG_ENABLE_MODULES = YES;
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CLANG_ENABLE_OBJC_ARC = YES;
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CLANG_WARN_BOOL_CONVERSION = YES;
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CLANG_WARN_CONSTANT_CONVERSION = YES;
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CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
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CLANG_WARN_EMPTY_BODY = YES;
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CLANG_WARN_ENUM_CONVERSION = YES;
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CLANG_WARN_INT_CONVERSION = YES;
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CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
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CLANG_WARN_UNREACHABLE_CODE = YES;
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CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
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CODE_SIGN_IDENTITY = "-";
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COPY_PHASE_STRIP = NO;
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DEBUG_INFORMATION_FORMAT = dwarf;
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ENABLE_STRICT_OBJC_MSGSEND = YES;
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ENABLE_TESTABILITY = YES;
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GCC_C_LANGUAGE_STANDARD = gnu99;
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GCC_DYNAMIC_NO_PIC = NO;
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GCC_NO_COMMON_BLOCKS = YES;
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GCC_OPTIMIZATION_LEVEL = 0;
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GCC_PREPROCESSOR_DEFINITIONS = (
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"DEBUG=1",
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"$(inherited)",
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);
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GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
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GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
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GCC_WARN_UNDECLARED_SELECTOR = YES;
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GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
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GCC_WARN_UNUSED_FUNCTION = YES;
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GCC_WARN_UNUSED_VARIABLE = YES;
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MACOSX_DEPLOYMENT_TARGET = 10.11;
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MTL_ENABLE_DEBUG_INFO = YES;
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ONLY_ACTIVE_ARCH = YES;
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SDKROOT = macosx;
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SWIFT_OPTIMIZATION_LEVEL = "-Onone";
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};
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name = Debug;
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};
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9B71F06A1C5B8A020002C59D /* Release */ = {
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isa = XCBuildConfiguration;
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buildSettings = {
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ALWAYS_SEARCH_USER_PATHS = NO;
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CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
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CLANG_CXX_LIBRARY = "libc++";
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CLANG_ENABLE_MODULES = YES;
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CLANG_ENABLE_OBJC_ARC = YES;
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CLANG_WARN_BOOL_CONVERSION = YES;
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CLANG_WARN_CONSTANT_CONVERSION = YES;
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CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
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CLANG_WARN_EMPTY_BODY = YES;
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CLANG_WARN_ENUM_CONVERSION = YES;
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CLANG_WARN_INT_CONVERSION = YES;
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CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
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CLANG_WARN_UNREACHABLE_CODE = YES;
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CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
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CODE_SIGN_IDENTITY = "-";
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COPY_PHASE_STRIP = NO;
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DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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ENABLE_NS_ASSERTIONS = NO;
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ENABLE_STRICT_OBJC_MSGSEND = YES;
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GCC_C_LANGUAGE_STANDARD = gnu99;
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GCC_NO_COMMON_BLOCKS = YES;
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GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
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GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
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GCC_WARN_UNDECLARED_SELECTOR = YES;
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GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
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GCC_WARN_UNUSED_FUNCTION = YES;
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GCC_WARN_UNUSED_VARIABLE = YES;
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MACOSX_DEPLOYMENT_TARGET = 10.11;
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MTL_ENABLE_DEBUG_INFO = NO;
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SDKROOT = macosx;
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};
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name = Release;
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};
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9B71F06C1C5B8A020002C59D /* Debug */ = {
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isa = XCBuildConfiguration;
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buildSettings = {
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PRODUCT_NAME = "$(TARGET_NAME)";
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};
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name = Debug;
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};
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9B71F06D1C5B8A020002C59D /* Release */ = {
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isa = XCBuildConfiguration;
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buildSettings = {
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PRODUCT_NAME = "$(TARGET_NAME)";
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};
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name = Release;
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};
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/* End XCBuildConfiguration section */
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/* Begin XCConfigurationList section */
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9B71F05F1C5B8A020002C59D /* Build configuration list for PBXProject "SwiftMysterious" */ = {
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isa = XCConfigurationList;
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buildConfigurations = (
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9B71F0691C5B8A020002C59D /* Debug */,
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9B71F06A1C5B8A020002C59D /* Release */,
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);
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defaultConfigurationIsVisible = 0;
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defaultConfigurationName = Release;
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};
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9B71F06B1C5B8A020002C59D /* Build configuration list for PBXNativeTarget "SwiftMysterious" */ = {
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isa = XCConfigurationList;
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buildConfigurations = (
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9B71F06C1C5B8A020002C59D /* Debug */,
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9B71F06D1C5B8A020002C59D /* Release */,
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);
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defaultConfigurationIsVisible = 0;
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};
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/* End XCConfigurationList section */
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};
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rootObject = 9B71F05C1C5B8A020002C59D /* Project object */;
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}

‎SwiftMysterious/SwiftMysterious/InlineLazy.swift‎

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//
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// InlineLazy.swift
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// SwiftMysterious
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//
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// Created by 张星宇 on 16/1/29.
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// Copyright © 2016年 zxy. All rights reserved.
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//
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import Foundation
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/// Important!!!!
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/// 虽然懒加载的本质是闭包，而且闭包中捕获了self，但是这里并不会产生循环引用
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/// 猜测Swift在捕获self时，自动把它标记为unowned
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class ExpensiveObject {
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init () {
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print("初始化ExpensiveObject对象的过程非常耗时")
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}
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}
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class PersonOld {
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lazy var expensiveObject: ExpensiveObject = {
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return self.createExpensiveObject() // 传统实现方式
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}()
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private func createExpensiveObject() -> ExpensiveObject {
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return ExpensiveObject()
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}
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deinit {
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print("Person 对象销毁")
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}
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}
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class Person {
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// 内联的lazy属性可以简化不少代码
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lazy var expensiveObject: ExpensiveObject = self.createExpensiveObject()
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private func createExpensiveObject() -> ExpensiveObject {
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return ExpensiveObject()
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}
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deinit {
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print("Person 对象销毁")
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}
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}
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func lazyVariable() {
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print("传统的lazy属性的实现")
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let p = PersonOld()
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_ = p.expensiveObject
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}
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func inlineLazyVariable() {
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print("\n内联lazy属性的实现")
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let p = Person()
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_ = p.expensiveObject
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}

‎SwiftMysterious/SwiftMysterious/LoopLabel.swift‎

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//
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// LoopLabel.swift
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// SwiftMysterious
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//
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// Created by 张星宇 on 16/1/29.
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// Copyright © 2016年 zxy. All rights reserved.
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//
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import Foundation
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let firstNames = ["Neil","Kt","Bob"]
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let lastNames = ["Zhou","Zhang","Wang","Li"]
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func normalBreak() {
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print("\n正常的break循环")
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for firstName in firstNames {
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var isFound = false
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for lastName in lastNames {
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if firstName == "Kt" && lastName == "Zhang" {
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isFound = true
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break
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}
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print(firstName + " " + lastName)
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}
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if isFound {
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break
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}
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}
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}
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func breakWithLoopLabel() {
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print("\n使用循环标签的break循环")
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outsideloop: for firstName in firstNames {
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innerloop: for lastName in lastNames {
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if firstName == "Kt" && lastName == "Zhang" {
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break outsideloop
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}
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print(firstName + " " + lastName)
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}
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}
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}

‎SwiftMysterious/SwiftMysterious/SpecialLiteral.swift‎

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//
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// SpecialLiteral.swift
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// SwiftMysterious
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//
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// Created by 张星宇 on 16/1/29.
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// Copyright © 2016年 zxy. All rights reserved.
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//
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import Foundation
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func specialLitertalExpression() {
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print("\n用于调试的特殊字面量表达式")
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print(__FILE__)
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print(__FUNCTION__)
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print(__LINE__)
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print(__COLUMN__) // 输出结果为11，因为有4个空格，print是五个字符，还有一个左括号。
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}

‎SwiftMysterious/SwiftMysterious/main.swift‎

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//
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// main.swift
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// SwiftMysterious
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//
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// Created by 张星宇 on 16/1/29.
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// Copyright © 2016年 zxy. All rights reserved.
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//
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import Foundation
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lazyVariable() // 默认的lazy属性实现
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inlineLazyVariable() // 内联的lazy属性实现
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specialLitertalExpression() // 用于调试的特殊字面量表达式
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normalBreak() // 正常的break循环
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breakWithLoopLabel() // 使用循环标签的break循环

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