| /// Codable doesn't do a good job of Dictionaries with non-String keys. | |
| /// This property wrapper fixes things. | |
| /// | |
| /// Context: https://oleb.net/blog/2017/12/dictionary-codable-array/ | |
| /// Tests: StringKeyDictionaryTests | |
| @propertyWrapper | |
| public struct StringKeyDictionary<Key: RawRepresentable & Hashable & Decodable, Value: Codable>: Codable where Key.RawValue == String { | |
| public var wrappedValue: [Key: Value] | |
| public init(wrappedValue: [Key: Value]) { | |
| self.wrappedValue = wrappedValue |
| protocol AST { | |
| associatedtype NodeType = Self | |
| var children: [NodeType] { get } | |
| } | |
| extension AST where NodeType: AST, NodeType.NodeType == NodeType { | |
| func traverse(check: (Self.NodeType) -> Bool) { | |
| for child in children { | |
| if check(child) { | |
| child.traverse(check: check) |
Describing dispatch scenarios is confusing, and spelling out the code is wordy. In an attempt to keep this document clear and compact, I'll use a short hand to describe the declaration scenarios.
Short hand:
T = Type (class / struct / enum)
ST = Sub Type (only applies to classes)
P = Protocol
M1.T = Type from the other module
This proposal enhances protocol implementation safety. It incorporates two keywords that cooperate with compiler checks to limit "near miss" implementation errors and accidental member overrides. This is a strictly syntactic system intended to provide greater safety at compile time, and would not affect existing compiled code bases. *** BK: Saying it does not affect implies to me that it's optional. ***
| Brians-MBP:SketchyCode bking$ git status | |
| On branch master | |
| Your branch is up-to-date with 'origin/master'. | |
| Changes to be committed: | |
| (use "git reset HEAD <file>..." to unstage) | |
| new file: SketchyCode/SketchyCode/Info.plist | |
| new file: SketchyCode/SketchyCode/JSONBuilder/SketchClass.stencil | |
| new file: SketchyCode/SketchyCode/JSONBuilder/SketchTypeBuilder.swift | |
| new file: SketchyCode/SketchyCode/SketchClasses+Helpers.swift |
| // Ignore the first few unknowns: | |
| struct MSAssetCollection { | |
| let gradients: [<<Unknown>>] | |
| let images: [<<Unknown>>] | |
| let colors: [MSColor] | |
| let imageCollection: MSImageCollection | |
| } | |
| struct MSImageCollection { |
| (lldb) bt | |
| * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) | |
| * frame #0: 0x000000010051d687 libswiftCore.dylib`::_swift_release_dealloc(object=0x0000000101509670) at HeapObject.cpp:558 | |
| frame #1: 0x0000000100528166 libswiftCore.dylib`bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(this=0x0000000101509678, oldbits=(bits = 0), dec=1)0, (swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) at RefCount.h:1046 | |
| frame #2: 0x0000000100526b8c libswiftCore.dylib`bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrement<(this=0x0000000101509678, dec=1)0, (swift::PerformDeinit)1>(unsigned int) at RefCount.h:1104 | |
| frame #3: 0x0000000100517381 libswiftCore.dylib`::_swift_release_(swift::HeapObject *) [inlined] swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::decrementAndMaybeDeinit(this=0x0000000101509678, dec=1) at RefCount.h:907 |
| Some errors are masked a bit. This one is pretty clear: | |
| ******************** | |
| FAIL: Swift(macosx-x86_64) :: attr/open.swift (2514 of 2903) | |
| ******************** TEST 'Swift(macosx-x86_64) :: attr/open.swift' FAILED ******************** | |
| Script: | |
| -- | |
| rm -rf /Users/bking/sandbox/swift-source/build/Ninja-DebugAssert/swift-macosx-x86_64/test-macosx-x86_64/attr/Output/open.swift.tmp && mkdir -p /Users/bking/sandbox/swift-source/build/Ninja-DebugAssert/swift-macosx-x86_64/test-macosx-x86_64/attr/Output/open.swift.tmp | |
| xcrun --toolchain default --sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk swiftc -target x86_64-apple-macosx10.9 -module-cache-path '/var/folders/33/wl32_mc90t58zkt8sn1sm_sc0000gn/T/swift-testsuite-clang-module-cachecpuIWO' -F /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/../../../Developer/Library/Frameworks -Xlinker -rpath -Xlinker /Applications/Xcode-beta.app/Contents/Developer/Plat |
XCTest is the default test harness on iOS an Apple’s other platforms. It provides support for organizing test cases and asserting expectations in your application code, and reporting the status of those expectations. It's not as fancy as some of the BDD frameworks like Quick and Cedar, but it has gotten much better than it used to be, and is my preferred test framework these days.
One place where the XCTest assertion utilities fall a bit short has been with managing Optional variables in swift. The default use of XCTAssertNotNil don't provide any mechanism for unwrapping, easily leading to assertion checks like this:
class TestCaseDefault: XCTestCase {
This proposal disallows the final keyword when declaring functions in protocol