Annotated remaining Converter classes for nullability#30573
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Pull Request Overview
This PR annotates the remaining converter classes with nullable reference types, improves error handling for invalid inputs, and updates public API signatures across all frameworks.
- Updated converter method signatures in ThicknessTypeConverter, KeyboardTypeConverter, FlexEnumsConverters, and EasingTypeConverter to use nullable annotations.
- Enhanced parsing logic with null checks and explicit exceptions for unsupported or malformed values.
- Updated PublicAPI.Unshipped.txt entries to expose new nullable overloads for converter methods.
Reviewed Changes
Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| src/Core/src/Converters/ThicknessTypeConverter.cs | Added nullable annotations to signatures and improved parsing error paths. |
| src/Core/src/Converters/PrimitiveTypeConversions.cs | Removed unnecessary #nullable enable directive. |
| src/Core/src/Converters/KeyboardTypeConverter.cs | Refined null guards, updated signature, and improved ConvertTo error logic. |
| src/Core/src/Converters/FlexEnumsConverters.cs | Applied nullable annotations and refined enum parsing in all converters. |
| src/Core/src/Converters/EasingTypeConverter.cs | Introduced null handling in ConvertFrom and updated nullable signatures. |
| src/Core/src/PublicAPI/netstandard2.0/PublicAPI.Unshipped.txt | Exposed new nullable converter overloads in the public API surface. |
Comments suppressed due to low confidence (3)
src/Core/src/Converters/KeyboardTypeConverter.cs:48
- [nitpick] The long sequence of
ifchecks for eachKeyboardvalue is repetitive; consider using aswitchexpression or a lookup dictionary to improve readability and reduce maintenance overhead.
public override object ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
src/Core/src/Converters/EasingTypeConverter.cs:19
- [nitpick] New behavior returns
nullfor anullor whitespace input; please add unit tests to cover these null-returning scenarios and ensure they behave as expected.
if (value is null)
| public class ThicknessTypeConverter : TypeConverter | ||
| { | ||
| public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) | ||
| public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType) |
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Updating the signature of a public override is a breaking change; please confirm that introducing a nullable context parameter in a patch/minor release is intended.
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PureWeen
approved these changes
Jul 15, 2025
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Description of Change
This pull request updates multiple type converters across the codebase to improve nullability handling, enhance error handling, and ensure compliance with modern C# standards. The changes primarily involve adding nullable annotations, refining method implementations, and improving readability and maintainability.
Nullability Enhancements:
src/Core/src/Converters/EasingTypeConverter.cs: Updated methods (CanConvertFrom,CanConvertTo,ConvertFrom,ConvertTo, etc.) to use nullable annotations for parameters and return types, ensuring better handling of null values. [1] [2] [3]src/Core/src/Converters/FlexEnumsConverters.cs: Applied nullable annotations across all type converters (FlexJustifyTypeConverter,FlexDirectionTypeConverter, etc.) to improve type safety and nullability handling. [1] [2] [3] [4] [5] [6] [7]Error Handling Improvements:
src/Core/src/Converters/KeyboardTypeConverter.cs: Enhanced error handling by adding null checks and throwingInvalidOperationExceptionorNotSupportedExceptionwhere appropriate, ensuring better handling of unexpected input values.src/Core/src/Converters/ThicknessTypeConverter.cs: Added validation checks and improved error handling for parsing thickness values from strings, ensuring more robust conversions.Codebase Cleanup:
src/Core/src/Converters/PrimitiveTypeConversions.cs: Removed unnecessary#nullable enabledirective, simplifying the file.src/Core/src/Converters/ThicknessTypeConverter.cs: Refined method signatures and added nullable annotations to align with modern C# practices.Issues Fixed
Fixes #28860