feat(runtime): add nullability annotations to NativeScript.h - #461
feat(runtime): add nullability annotations to NativeScript.h#461adrian-niculescu wants to merge 2 commits into
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Without them every pointer in the embedder API imports into Swift as implicitly unwrapped, which hides the contract the implementation already has: BaseDir, the script string and the Config argument are required (their UTF8String feeds a std::string), while ApplicationPath, MetadataPtr and Arguments are optional with defaults (BaseDir/app, the __TNSMetadata section, no inspector arguments). initWithConfig: never returns nil.
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Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe ChangesConfig nullability and inspector arguments
Estimated code review effort: 1 (Trivial) | ~5 minutes Merge Risk: ⚪ Minimal · up to The PR clarifies pointer nullability for Swift callers and prevents a nil debug argument list from being indexed with a stale count; no actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: Poem
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Inline comments:
In `@NativeScript/NativeScript.h`:
- Line 13: Update the Arguments property declaration to use a nonnull element
pointer with a nullable outer array, then adjust
JsV8InspectorClient::enableInspector to safely handle a nil Arguments array when
ArgumentsCount indicates entries before passing elements to strcmp.
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NativeScript/NativeScript.h
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Config.Arguments is optional, but ArgumentsCount was handed to the inspector as is, so a nil array with a count above one made debug startup index a null argv. Pass a count of 0 when the array is nil; the argv loop keeps the C contract and trusts the count it is given.
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The embedder header has no nullability annotations, so a Swift embedder sees every pointer in
ConfigandNativeScriptas implicitly unwrapped. The implementation already has a clear contract:BaseDir, the script string and theConfigargument are required (theirUTF8Stringgoes straight into astd::string),ApplicationPathandMetadataPtrfall back toBaseDir/appand the__TNSMetadatasection when nil,Argumentsis only read whenIsDebugis set, andinitWithConfig:never returns nil.This wraps the header in
NS_ASSUME_NONNULLand marks the three optional propertiesnullable, so Swift imports them asString?/UnsafeMutableRawPointer?/ an optional argv and the rest as non-optional. No change for Objective-C callers; the in-repo consumers (TestRunner, AppWithModules, the project templates) already set the required fields. A nilArgumentswith a staleArgumentsCountmade debug startup index a null argv; the inspector gets a count of 0 in that case.Checked with
clang -fsyntax-only -Wnullability-completeness -Werrorin both Objective-C and Objective-C++, with a Swift type-check of the imported API, and with the TestRunner suite on the iOS simulator.Summary by CodeRabbit