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feat: Add outcome logic for optional property wrappers #18
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📝 WalkthroughWalkthroughResilient decoding was extended across date, default, and polymorphic wrappers: missing keys and explicit nulls are treated as non-fatal outcomes (e.g., Changes
Sequence Diagram(s)OptionalDateValue Decodable initializer (high-level) sequenceDiagram
participant Decoder
participant Container as SingleValueContainer
participant OptionalDateValue
Note right of OptionalDateValue: init(from: Decoder)
Decoder->>Decoder: makeSingleValueContainer()
Decoder->>Container: container.decode(Formatter.RawValue.self)
alt decode succeeds
Container-->OptionalDateValue: rawValue
OptionalDateValue->>OptionalDateValue: T.decode(rawValue) -> date / throw
alt decode success
OptionalDateValue-->Decoder: wrappedValue=date, outcome=decodedSuccessfully
else decode failure
OptionalDateValue-->Decoder: rethrow (report in DEBUG)
end
else DecodingError.keyNotFound
Container-->OptionalDateValue: catch keyNotFound
OptionalDateValue-->Decoder: wrappedValue=nil, outcome=keyNotFound
else DecodingError.valueNotFound (raw type match)
Container-->OptionalDateValue: catch valueNotFound
OptionalDateValue-->Decoder: wrappedValue=nil, outcome=valueWasNil
else other errors
Container-->OptionalDateValue: rethrow
end
KeyedDecodingContainer.decodeIfPresent for OptionalDateValue (high-level) sequenceDiagram
participant Caller
participant KDC as KeyedDecodingContainer
participant OptionalDateValue
Caller->>KDC: decodeIfPresent(OptionalDateValue<T>.self, forKey:key)
alt key missing
KDC-->Caller: nil
else key present but null
KDC-->Caller: OptionalDateValue(wrappedValue=nil, outcome=valueWasNil)
else value present
KDC->>KDC: decode raw string/RawValue via singleValueContainer
alt decode + T.decode success
KDC-->Caller: OptionalDateValue(wrappedValue=date, outcome=decodedSuccessfully)
else decode throws (format/type)
KDC-->Caller: rethrow (or report in DEBUG)
end
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes Suggested labels
Pre-merge checks and finishing touches❌ Failed checks (2 warnings, 1 inconclusive)
✅ Passed checks (2 passed)
✨ Finishing touches
🧪 Generate unit tests
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Actionable comments posted: 6
📜 Review details
Configuration used: Path: .coderabbit.yml
Review profile: ASSERTIVE
Plan: Pro
Disabled knowledge base sources:
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📒 Files selected for processing (9)
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift(2 hunks)Sources/KarrotCodableKit/BetterCodable/Defaults/DefaultCodable.swift(0 hunks)Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift(1 hunks)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift(2 hunks)Sources/KarrotCodableKit/PolymorphicCodable/LossyOptionalPolymorphicValue.swift(1 hunks)Sources/KarrotCodableKit/PolymorphicCodable/OptionalPolymorphicValue.swift(1 hunks)Tests/KarrotCodableKitTests/BetterCodable/DateValue/OptionalDateValueResilientTests.swift(1 hunks)Tests/KarrotCodableKitTests/BetterCodable/Defaults/DefaultCodableResilientTests.swift(4 hunks)Tests/KarrotCodableKitTests/PolymorphicCodable/ArrayValue/DefaultEmptyPolymorphicArrayValueResilientTests.swift(2 hunks)
💤 Files with no reviewable changes (1)
- Sources/KarrotCodableKit/BetterCodable/Defaults/DefaultCodable.swift
🧰 Additional context used
📓 Path-based instructions (2)
Tests/KarrotCodableKitTests/**
⚙️ CodeRabbit configuration file
Tests/KarrotCodableKitTests/**: You are a senior Swift/iOS engineer reviewing runtime functionality tests for KarrotCodableKit's Codable extensions.1. Runtime Behavior Testing [HIGH]
- Verify JSON encoding/decoding scenarios cover real-world use cases
- Check polymorphic type resolution testing across different strategies
- Assess property wrapper testing (@DATEvalue, @DefaultFalse, etc.)
- Validate error handling and edge case coverage
2. Test Data Quality [HIGH]
- Review test JSON structures for realistic complexity
- Check that TestDoubles provide comprehensive mock scenarios
- Verify test data covers various data types and edge cases
- Assess polymorphic test data represents actual usage patterns
3. Integration Testing [MEDIUM]
- Check integration between macro-generated code and runtime functionality
- Verify end-to-end scenarios combining multiple KarrotCodableKit features
- Assess performance testing for large data structures
- Review memory usage testing for complex polymorphic scenarios
Review Focus
- Prioritize real-world usage scenario coverage
- Focus on Codable correctness and performance implications
- Mark comments with priority: [HIGH], [MEDIUM], or [LOW]
Files:
Tests/KarrotCodableKitTests/BetterCodable/Defaults/DefaultCodableResilientTests.swiftTests/KarrotCodableKitTests/BetterCodable/DateValue/OptionalDateValueResilientTests.swiftTests/KarrotCodableKitTests/PolymorphicCodable/ArrayValue/DefaultEmptyPolymorphicArrayValueResilientTests.swift
Sources/KarrotCodableKit/**
⚙️ CodeRabbit configuration file
Sources/KarrotCodableKit/**: You are a senior Swift/iOS engineer reviewing runtime library code for KarrotCodableKit, a comprehensive Codable extension framework.1. Codable Performance [HIGH]
- Check encoding/decoding efficiency and memory usage
- Verify proper handling of large JSON structures
- Assess polymorphic type resolution performance
- Review property wrapper overhead and optimization
2. Type Safety & Polymorphism [HIGH]
- Validate PolymorphicCodable identifier-based type resolution
- Check AnyCodable type erasure implementation for edge cases
- Verify UnnestedPolymorphic macro integration with runtime components
- Assess error handling in polymorphic decoding scenarios
3. API Design [HIGH]
- Evaluate public interface consistency across modules
- Check property wrapper ergonomics (@DefaultFalse, @DATEvalue, etc.)
- Verify protocol design follows Swift API guidelines
- Assess extensibility for new Codable patterns
4. BetterCodable Integration [MEDIUM]
- Review property wrapper implementations for common patterns
- Check date strategy implementations (ISO8601, RFC3339, etc.)
- Verify default value and lossy conversion handling
- Assess data encoding strategies (Base64, etc.)
5. Error Handling [MEDIUM]
- Verify comprehensive DecodingError and EncodingError usage
- Check PolymorphicCodableError provides sufficient context
- Assess graceful fallback handling in polymorphic scenarios
Review Focus
- Prioritize runtime correctness and performance over style
- Focus on real-world JSON processing scenarios
- Mark comments with priority: [HIGH], [MEDIUM], or [LOW]
Files:
Sources/KarrotCodableKit/PolymorphicCodable/LossyOptionalPolymorphicValue.swiftSources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swiftSources/KarrotCodableKit/PolymorphicCodable/OptionalPolymorphicValue.swiftSources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swiftSources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift
🧬 Code graph analysis (4)
Tests/KarrotCodableKitTests/BetterCodable/Defaults/DefaultCodableResilientTests.swift (9)
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift (1)
decode(101-119)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift (1)
decode(12-29)Sources/KarrotCodableKit/BetterCodable/LosslessValue/OptionalLosslessValue.swift (1)
decode(169-182)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+LossyOptionalPolymorphicValue.swift (1)
decode(12-21)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+OptionalPolymorphicArrayValue.swift (1)
decode(12-21)Sources/KarrotCodableKit/BetterCodable/LossyValue/LossyDictionary.swift (1)
decode(273-295)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+PolymorphicLossyArrayValue.swift (1)
decode(12-72)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+OptionalPolymorphicValue.swift (1)
decode(12-21)Sources/KarrotCodableKit/Resilient/ErrorReporting.swift (1)
decode(56-71)
Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift (2)
Sources/KarrotCodableKit/Resilient/ErrorReporting.swift (1)
reportError(154-166)Sources/KarrotCodableKit/Resilient/ResilientDecodingOutcome.swift (1)
recoveredFrom(46-46)
Tests/KarrotCodableKitTests/BetterCodable/DateValue/OptionalDateValueResilientTests.swift (1)
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift (1)
decode(101-119)
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift (5)
Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift (2)
decode(12-29)decodeIfPresent(31-48)Sources/KarrotCodableKit/BetterCodable/LosslessValue/OptionalLosslessValue.swift (1)
decode(169-182)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+LossyOptionalPolymorphicValue.swift (2)
decode(12-21)decodeIfPresent(23-52)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+OptionalPolymorphicArrayValue.swift (2)
decode(12-21)decodeIfPresent(23-57)Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+OptionalPolymorphicValue.swift (1)
decodeIfPresent(23-46)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Check Macro Compatibility
- GitHub Check: Build and Test (16.4, release)
🔇 Additional comments (14)
Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift (2)
13-15: Signature tweak looks good and consistent with other wrappers [LOW]Renamed internal parameter improves readability and matches the broader refactor.
31-48: Confirmed: keep decodeIfPresent behavior (null → non‑nil wrapper with .valueWasNil)This is intentional and consistent with other helpers (see Sources/KarrotCodableKit/PolymorphicCodable/Extensions/KeyedDecodingContainer+DefaultEmptyPolymorphicArrayValue.swift and the OptionalPolymorphic*/DefaultCodable helpers) and covered by tests that assert .valueWasNil (Tests/...DefaultEmptyPolymorphicArrayValueResilientTests.swift). No call sites were found that rely on “nil means null” for this wrapper.
Tests/KarrotCodableKitTests/PolymorphicCodable/ArrayValue/DefaultEmptyPolymorphicArrayValueResilientTests.swift (2)
119-121: Good: missing key expects.keyNotFoundand no error [LOW]Matches the new resilience model.
140-142: Good: null value expects.valueWasNiland no error [LOW]Consistent with the decoding extension behavior.
Tests/KarrotCodableKitTests/BetterCodable/Defaults/DefaultCodableResilientTests.swift (3)
81-87: Correct: missing keys should not surface errors under DEBUG [LOW]Assertions align with the new DefaultCodable extension semantics.
345-356: Great: RawRepresentable missing keys assert.keyNotFoundand no errors [LOW]Outcome checks look right for both enums.
372-383: Great: RawRepresentable null values assert.valueWasNiland no errors [LOW]Matches the updated decode path for DefaultCodable + RawRepresentable.
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift (1)
100-119: OptionalDateValue keyed decoding looks solid. [MEDIUM]Key checks for
containsanddecodeNilavoid throwing and set precise outcomes; decoding then happens viaT.RawValuefollowed byT.decode. Good balance of resilience and performance.Please confirm that all
OptionalDateValuestrategies haveRawValue: Decodableand that no call sites rely on the previousdecodeIfPresentspecialization.Tests/KarrotCodableKitTests/BetterCodable/DateValue/OptionalDateValueResilientTests.swift (5)
24-40: Great coverage for missing-key/null ISO8601 paths. [LOW]The tests validate both outcome and no-error behavior cleanly.
64-85: Valid ISO8601 success-path checks. [LOW]Asserting the exact epoch aligns with the strategy. Looks good.
87-119: Error-path assertions are appropriate. [LOW]Type/format mismatch tests ensure non-resilient errors still surface.
163-207: Timestamp strategy tests cover double and integer inputs. [LOW]Both numeric forms are validated; outcomes match expectations.
246-256: Direct single-value decoding negative case is correct. [LOW]Decoding from
{}should throw; good guard test.Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift (1)
120-175: RawRepresentable handling is robust. [MEDIUM]Unknown raw values convert to
UnknownNovelValueErrorunless frozen; error reporting is DEBUG-only with recovery outcome. Looks good.
Sources/KarrotCodableKit/BetterCodable/DateValue/OptionalDateValue.swift
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Actionable comments posted: 1
📜 Review details
Configuration used: Path: .coderabbit.yml
Review profile: ASSERTIVE
Plan: Pro
Disabled knowledge base sources:
- Jira integration is disabled by default for public repositories
- Linear integration is disabled by default for public repositories
You can enable these sources in your CodeRabbit configuration.
📒 Files selected for processing (4)
Sources/KarrotCodableKit/BetterCodable/Defaults/DefaultCodable.swift(0 hunks)Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift(1 hunks)Sources/KarrotCodableKit/PolymorphicCodable/LossyOptionalPolymorphicValue.swift(1 hunks)Sources/KarrotCodableKit/PolymorphicCodable/OptionalPolymorphicValue.swift(2 hunks)
💤 Files with no reviewable changes (1)
- Sources/KarrotCodableKit/BetterCodable/Defaults/DefaultCodable.swift
🧰 Additional context used
📓 Path-based instructions (1)
Sources/KarrotCodableKit/**
⚙️ CodeRabbit configuration file
Sources/KarrotCodableKit/**: You are a senior Swift/iOS engineer reviewing runtime library code for KarrotCodableKit, a comprehensive Codable extension framework.1. Codable Performance [HIGH]
- Check encoding/decoding efficiency and memory usage
- Verify proper handling of large JSON structures
- Assess polymorphic type resolution performance
- Review property wrapper overhead and optimization
2. Type Safety & Polymorphism [HIGH]
- Validate PolymorphicCodable identifier-based type resolution
- Check AnyCodable type erasure implementation for edge cases
- Verify UnnestedPolymorphic macro integration with runtime components
- Assess error handling in polymorphic decoding scenarios
3. API Design [HIGH]
- Evaluate public interface consistency across modules
- Check property wrapper ergonomics (@DefaultFalse, @DATEvalue, etc.)
- Verify protocol design follows Swift API guidelines
- Assess extensibility for new Codable patterns
4. BetterCodable Integration [MEDIUM]
- Review property wrapper implementations for common patterns
- Check date strategy implementations (ISO8601, RFC3339, etc.)
- Verify default value and lossy conversion handling
- Assess data encoding strategies (Base64, etc.)
5. Error Handling [MEDIUM]
- Verify comprehensive DecodingError and EncodingError usage
- Check PolymorphicCodableError provides sufficient context
- Assess graceful fallback handling in polymorphic scenarios
Review Focus
- Prioritize runtime correctness and performance over style
- Focus on real-world JSON processing scenarios
- Mark comments with priority: [HIGH], [MEDIUM], or [LOW]
Files:
Sources/KarrotCodableKit/PolymorphicCodable/OptionalPolymorphicValue.swiftSources/KarrotCodableKit/PolymorphicCodable/LossyOptionalPolymorphicValue.swiftSources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift
🧬 Code graph analysis (1)
Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift (2)
Sources/KarrotCodableKit/Resilient/ErrorReporting.swift (1)
reportError(154-166)Sources/KarrotCodableKit/Resilient/ResilientDecodingOutcome.swift (1)
recoveredFrom(46-46)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Build and Test (16.4, release)
- GitHub Check: Check Macro Compatibility
🔇 Additional comments (9)
Sources/KarrotCodableKit/PolymorphicCodable/OptionalPolymorphicValue.swift (2)
11-19: Documentation accurately reflects the resilient handling behavior [HIGH]The updated documentation correctly describes the new behavior where
keyNotFoundandvalueNotFound(when type matches) are handled gracefully by settingnilwith appropriate outcomes, while other errors are rethrown. This addresses the previous concern about documentation-code divergence.
66-73: Outcome tracking implementation is correct and consistent [HIGH]The implementation properly distinguishes between
keyNotFoundandvalueWasNilcases, setting appropriate outcomes. The type check in thevalueNotFoundhandler correctly ensures we only handle cases where the missing value is of the expected polymorphic type.Sources/KarrotCodableKit/PolymorphicCodable/LossyOptionalPolymorphicValue.swift (2)
15-22: Update documentation to reflect decoder.reportError usage [MEDIUM]The documentation still mentions "logs the encountered error using
decoder.reportErrorfor error reporting. Please update this line to accurately describe the current error reporting mechanism.Apply this diff to fix the documentation:
/// Unlike `@PolymorphicValue`, if the `PolymorphicType.decode(from:)` method throws *any* error during decoding /// (e.g., missing identifier key, unknown identifier value, invalid data for the concrete type, or even a missing key for the value itself), /// this wrapper catches the error and assigns `nil` to the `wrappedValue`. -/// It logs the encountered error using `print`. +/// In DEBUG builds, it reports the encountered error via the decoder's error reporter.
68-75: Outcome handling for resilient decoding is properly implemented [HIGH]The new error handling branches correctly set specific outcomes for
keyNotFoundandvalueWasNilcases before falling through to the general error recovery path. This provides better granularity for debugging while maintaining the lossy behavior expected from this wrapper.Sources/KarrotCodableKit/BetterCodable/Defaults/Extenstions/KeyedDecodingContainer+DefaultCodable.swift (5)
10-10: Well-designed protocol for Bool strategies. [LOW]Good use of protocol composition to create a specialized marker protocol for Bool-specific default strategies. This provides clear intent and enables targeted method overloading.
121-188: Excellent RawRepresentable handling with frozen/unfrozen distinction. [MEDIUM]The implementation properly differentiates between frozen and unfrozen enums, providing appropriate error types for each case. The DEBUG-only outcome tracking maintains production performance while aiding development debugging.
36-44: Simplify control flow - else branch is unreachable. [LOW]After checking
contains(key)anddecodeNil(forKey:) != true, thedecodeIfPresentcall will either return a non-nil value or throw an error - it won't return nil. The else branch (lines 38-44) is dead code.Refactor to use a do-catch block for cleaner error handling:
- // Try to decode normally - if let value = try decodeIfPresent(DefaultCodable<P>.self, forKey: key) { - return value - } else { - #if DEBUG - return DefaultCodable(wrappedValue: P.defaultValue, outcome: .keyNotFound) - #else - return DefaultCodable(wrappedValue: P.defaultValue) - #endif - } + // Try to decode normally + do { + return try decode(DefaultCodable<P>.self, forKey: key) + } catch let error as DecodingError { + // Handle decoding errors by falling back to default + #if DEBUG + let outcome: ResilientDecodingOutcome = (error.isKeyNotFound) ? .keyNotFound : .recoveredFrom(error, wasReported: false) + return DefaultCodable(wrappedValue: P.defaultValue, outcome: outcome) + #else + return DefaultCodable(wrappedValue: P.defaultValue) + #endif + }
93-98: Fix double-optional issue with decodeIfPresent. [HIGH]The current code has a compilation issue:
try? decodeIfPresent(Int.self, forKey: key)returnsInt??(double optional), butNSNumber(value:)expects a non-optionalInt. Since you've already verified the key exists and isn't nil, usedecodedirectly.Apply this fix to resolve the compilation error:
if - let intValue = try? decodeIfPresent(Int.self, forKey: key), + let intValue = try? decode(Int.self, forKey: key), let bool = Bool(exactly: NSNumber(value: intValue)) { return DefaultCodable(wrappedValue: bool) }
100-105: Bool(stringValue) initializer doesn't exist in Swift. [HIGH]Swift's standard library doesn't provide a
Boolinitializer that accepts aString. This will cause a compilation error.Implement explicit string-to-bool parsing:
if - let stringValue = try? decodeIfPresent(String.self, forKey: key), - let bool = Bool(stringValue) + let stringValue = try? decode(String.self, forKey: key) { - return DefaultCodable(wrappedValue: bool) + let trimmed = stringValue.trimmingCharacters(in: .whitespacesAndNewlines).lowercased() + switch trimmed { + case "true", "1", "yes": + return DefaultCodable(wrappedValue: true) + case "false", "0", "no": + return DefaultCodable(wrappedValue: false) + default: + break // Fall through to error handling + } }Alternatively, add a private Bool extension:
private extension Bool { init?(from string: String) { let trimmed = string.trimmingCharacters(in: .whitespacesAndNewlines).lowercased() switch trimmed { case "true", "1", "yes": self = true case "false", "0", "no": self = false default: return nil } } }Then use it as:
if let stringValue = try? decode(String.self, forKey: key), let bool = Bool(from: stringValue) { return DefaultCodable(wrappedValue: bool) }
Background (Required)
Changes (Required)
Added Outcome Logic
keyNotFoundandvalueWasNilcaseskeyNotFoundandvalueWasNilcaseskeyNotFoundandvalueWasNilcasesCode Structure Improvements
Reverted Previous Changes
Testing Approach (Required)
Unit Tests Added
keyNotFoundcase: Tests when key is missing from JSONvalueWasNilcase: Tests when value is nulldecodedSuccessfullycase: Tests successful decoding casesImpact on Existing Tests
Review Notes
Summary by CodeRabbit
New Features
Refactor
Tests