샘플

Demonstrate how Equatable runtimeType and property identity affect generic and collection equality

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케이스

목표

Demonstrate how Equatable runtimeType and property identity affect generic and collection equality HOW

패키지

equatable 2.1.0

환경

dart

생성일

2026-08-17T03:53:35Z

흔히 이렇게 알고 있다

Two generic Equatable instances with identical values are equal when one type argument is a subtype of the other, such as Box<num>(42) and Box<int>(42).

이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.

컨트랙트

• Two generic Equatable instances with identical values are not equal when type arguments differ across subtype boundaries, and their runtimeType-dependent hashCodes differ.
• Box<Object?> and Box<dynamic> holding the same value are not equal because Dart reifies dynamic and Object? as distinct runtime types.
• Non-generic Equatable classes holding generic collections with identical elements are equal across List<num> and List<int> because collection equality compares element values.
• Two distinct holders of the shared double.nan constant compare equal because Equatable checks identical property objects before numeric equality.
• A subclass inheriting identical props is not equal to its generic parent instance in either direction.

파일

• NOTES.md
• csx.json
• lib/generic_value.dart
• pubspec.lock
• pubspec.yaml
• test/contract.dart

소스 아티팩트 내려받기 (tar.gz)

오리진 시더

csx-seed

검증 영수증

• dart 3 · linux debian/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-17 · ed25519:d91480838ac982c9