Ninja does not quite support this extension arrangement.

- Move `_parseArguments` into UserDefaults.swift.

Author: millenomi

Foundation.xcodeproj/project.pbxproj

@@ -12,7 +12,6 @@
 		1520469B1D8AEABE00D02E36 /* HTTPServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1520469A1D8AEABE00D02E36 /* HTTPServer.swift */; };
 		153E951120111DC500F250BE /* CFKnownLocations.h in Headers */ = {isa = PBXBuildFile; fileRef = 153E950F20111DC500F250BE /* CFKnownLocations.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		153E951220111DC500F250BE /* CFKnownLocations.c in Sources */ = {isa = PBXBuildFile; fileRef = 153E951020111DC500F250BE /* CFKnownLocations.c */; };
-		153E95162012A29900F250BE /* UserDefaults_Arguments.swift in Sources */ = {isa = PBXBuildFile; fileRef = 153E95152012A29900F250BE /* UserDefaults_Arguments.swift */; };
 		159884921DCC877700E3314C /* TestHTTPCookieStorage.swift in Sources */ = {isa = PBXBuildFile; fileRef = 159884911DCC877700E3314C /* TestHTTPCookieStorage.swift */; };
 		231503DB1D8AEE5D0061694D /* TestDecimal.swift in Sources */ = {isa = PBXBuildFile; fileRef = 231503DA1D8AEE5D0061694D /* TestDecimal.swift */; };
 		294E3C1D1CC5E19300E4F44C /* TestNSAttributedString.swift in Sources */ = {isa = PBXBuildFile; fileRef = 294E3C1C1CC5E19300E4F44C /* TestNSAttributedString.swift */; };
@@ -503,7 +502,6 @@
 		1520469A1D8AEABE00D02E36 /* HTTPServer.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = HTTPServer.swift; sourceTree = "<group>"; };
 		153E950F20111DC500F250BE /* CFKnownLocations.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CFKnownLocations.h; sourceTree = "<group>"; };
 		153E951020111DC500F250BE /* CFKnownLocations.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = CFKnownLocations.c; sourceTree = "<group>"; };
-		153E95152012A29900F250BE /* UserDefaults_Arguments.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDefaults_Arguments.swift; sourceTree = "<group>"; };
 		159884911DCC877700E3314C /* TestHTTPCookieStorage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TestHTTPCookieStorage.swift; sourceTree = "<group>"; };
 		22B9C1E01C165D7A00DECFF9 /* TestDate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TestDate.swift; sourceTree = "<group>"; };
 		231503DA1D8AEE5D0061694D /* TestDecimal.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TestDecimal.swift; sourceTree = "<group>"; };
@@ -1795,7 +1793,6 @@
 			isa = PBXGroup;
 			children = (
 				EADE0B871BD15DFF00C49C64 /* UserDefaults.swift */,
-				153E95152012A29900F250BE /* UserDefaults_Arguments.swift */,
 				5BDC3F3B1BCC5DCB00ED97BB /* NSLocale.swift */,
 				5BD70FB11D3D4CDC003B9BF8 /* Locale.swift */,
 			);
@@ -2194,7 +2191,6 @@
 				61E0117E1C1B55B9000037DD /* Timer.swift in Sources */,
 				EADE0BCD1BD15E0000C49C64 /* XMLParser.swift in Sources */,
 				5BDC3FD01BCF17E600ED97BB /* NSCFSet.swift in Sources */,
-				153E95162012A29900F250BE /* UserDefaults_Arguments.swift in Sources */,
 				5B1FD9DE1D6D16580080E83C /* TaskRegistry.swift in Sources */,
 				EADE0B931BD15DFF00C49C64 /* NSComparisonPredicate.swift in Sources */,
 				5B1FD9DC1D6D16580080E83C /* URLSessionDelegate.swift in Sources */,

Foundation/UserDefaults.swift

@@ -408,3 +408,54 @@ extension UserDefaults {
     public static let argumentDomain: String = "NSArgumentDomain"
     public static let registrationDomain: String = "NSRegistrationDomain"
 }
+
+// MARK: -
+// MARK: Parsing arguments.
+
+fileprivate let propertyListPrefixes: Set<Character> = [ "{", "[", "(", "<", "\"" ]
+
+private extension UserDefaults {
+    static func _parseArguments(_ arguments: [String]) -> [String: Any] {
+        var result: [String: Any] = [:]
+        
+        let count = arguments.count
+        
+        var index = 0
+        while index < count - 1 { // We're looking for pairs, so stop at the second-to-last argument.
+            let current = arguments[index]
+            let next = arguments[index + 1]
+            if current.hasPrefix("-") && !next.hasPrefix("-") {
+                // Match what Darwin does, which is to check whether the first argument is one of the characters that make up a NeXTStep-style or XML property list: open brace, open parens, open bracket, open angle bracket, or double quote. If it is, attempt parsing it as a plist; otherwise, just use the argument value as a String.
+                
+                let keySubstring = current[current.index(after: current.startIndex)...]
+                if !keySubstring.isEmpty {
+                    let key = String(keySubstring)
+                    let value = next.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
+                    
+                    var parsed = false
+                    if let prefix = value.first, propertyListPrefixes.contains(prefix) {
+                        if let data = value.data(using: .utf8),
+                            let plist = try? PropertyListSerialization.propertyList(from: data, format: nil) {
+                            
+                            // If we can parse that argument as a plist, use the parsed value.
+                            parsed = true
+                            result[key] = plist
+                            
+                        }
+                    }
+                    
+                    if !parsed {
+                        result[key] = value
+                    }
+                }
+                
+                index += 1 // Skip both the key and the value on this loop.
+            }
+            
+            index += 1
+        }
+        
+        return result
+    }
+}
+

Foundation/UserDefaults_Arguments.swift

@@ -446,7 +446,6 @@
 	'Foundation/URLSession/libcurl/libcurlHelpers.swift',
     'Foundation/URLSession/http/HTTPURLProtocol.swift',
 	'Foundation/UserDefaults.swift',
-	'Foundation/UserDefaults_Arguments.swift',
 	'Foundation/NSUUID.swift',
 	'Foundation/NSValue.swift',
 	'Foundation/XMLDocument.swift',