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Package for automatic generation of copyWith methods in Dart classes using @CopyWith annotation.

Changelog #

3.3.0 - 2025-12-15 #

  • Added supporting exhaustive checking for sealed classes. Before it was based on factory constructors.
  • Fixed bug for generating classes with inherited fields.
  • Added supporting named constructors.

3.2.2 - 2025-12-12 #

  • Fixed behavior where inherited fields were passed to typedef

3.2.1 - 2025-12-12 #

  • Fixes a crash in the generator when a sealed class contains a non-redirecting factory constructor

3.2.0 - 2025-12-11 #

  • Added generation general fields for sealed classes.

3.1.0 - 2025-11-26 #

  • Added codegen for sealed classes.

3.0.0 #

  • default output now targets .g.dart via a shared part builder, avoiding clashes with other source_gen-based packages like json_serializable
  • documented how to override the extension when a dedicated .copy_with.dart file is preferred
  • restructured the bundled example into a proper library with clear english instructions for running build_runner

2.0.0 #

  • copyWith parameters now preserve the original field types, including generics and nullability
  • sentinel-backed parameters allow assigning null without manual casts
  • packaged runnable example at example/example.dart and updated documentation to match
  • switched licensing references to MIT and ensured generated example outputs ship with the package

1.0.0 #

  • initial release
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Package for automatic generation of copyWith methods in Dart classes using @CopyWith annotation.

Repository (GitHub)
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Topics

#codegen #copy-with #code-generation #annotation

Documentation

API reference

License

MIT (license)

Dependencies

analyzer, build, meta, source_gen

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