swiftlang/swift-foundation
Jul 2025 – Jul 2025
1 Month active
Languages Used
MarkdownObjective-CSwift
Technical Skills
Calendar APIDate and Time HandlingDocumentationInternationalizationProposal WritingUnit Testing
Christopher Chapman
PROFILE
Christopher Chapman
Developed and delivered Lunisolar Calendar: Repeated Days support for the swiftlang/swift-foundation repository, focusing on enhancing date handling for complex calendrical systems. Implemented the isRepeatedDay property within DateComponents using Swift and Objective-C, updating calculation logic and expanding the API surface to support repeated-day scenarios. Emphasized test-driven development by broadening unit tests to ensure robustness and correctness across edge cases. The work prioritized internationalization and downstream localization readiness, enabling more reliable scheduling features for applications relying on lunisolar calendars. Contributed through proposal writing, documentation, and cross-repository collaboration, with all changes integrated via two targeted commits during the project period.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
1
Lines of code
385
Activity Months1
Your Network
667 peopleSame Organization
@apple.com594
Work History
July 2025
2 Commits • 1 Features
Jul 1, 2025July 2025: Delivered Lunisolar Calendar: Repeated Days support for swift-foundation. Implemented isRepeatedDay in DateComponents, updated calculations and API surface, and expanded tests to ensure robustness. Work was implemented via two commits: db4bab836935cb110959bf713ef75ee3019a7b35 ("update expanded calendar support proposal (#1407)") and 5cdd2215840bd9d9c81298452570b989dadd53c3 ("rdar://138592292 (🌏 [New Calendars] Date Calculation & API Support) (#3168) (#1409)"). No separate major bugs were logged this month; focus remained on calendar correctness and API extensibility. Business value: more reliable date handling for lunisolar contexts, enabling downstream scheduling/localization features and reducing risk in date-based logic. Technologies/skills demonstrated: API design for DateComponents, calendar calculation logic, test-driven development, and cross-repo collaboration.
2 Commits • 1 Features
Jul 1, 2025July 2025: Delivered Lunisolar Calendar: Repeated Days support for swift-foundation. Implemented isRepeatedDay in DateComponents, updated calculations and API surface, and expanded tests to ensure robustness. Work was implemented via two commits: db4bab836935cb110959bf713ef75ee3019a7b35 ("update expanded calendar support proposal (#1407)") and 5cdd2215840bd9d9c81298452570b989dadd53c3 ("rdar://138592292 (🌏 [New Calendars] Date Calculation & API Support) (#3168) (#1409)"). No separate major bugs were logged this month; focus remained on calendar correctness and API extensibility. Business value: more reliable date handling for lunisolar contexts, enabling downstream scheduling/localization features and reducing risk in date-based logic. Technologies/skills demonstrated: API design for DateComponents, calendar calculation logic, test-driven development, and cross-repo collaboration.
July 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
MarkdownObjective-CSwift
Technical Skills
Calendar APIDate and Time HandlingDocumentationInternationalizationProposal WritingUnit Testing
Repositories Contributed To
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