샘플

Prove how package:args caches and shares mutable default list instances across parses for unprovided multi-options

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케이스

목표

Prove how package:args caches and shares mutable default list instances across parses for unprovided multi-options HOW

패키지

args 2.7.0

환경

dart

생성일

2026-08-17T06:45:46Z

흔히 이렇게 알고 있다

ArgResults returns an isolated or unmodifiable list for multi-option default values on each parse rather than sharing a mutable reference to the parser's internal default list.

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

컨트랙트

• ArgResults.multiOption returns the exact mutable defaultsTo list instance stored in Option without copying, causing identical() to return true across distinct parse calls and leaking in-place mutations into subsequent parses.
• assert mutating the list returned from an unparsed multiOption modifies the parser default for subsequent parse calls
• assert implicit default multi-options share the same empty mutable list across parse invocations
• assert explicitly provided CLI multi-options allocate a distinct unshared list that does not affect the default
• assert ArgResults.arguments and ArgResults.rest are unmodifiable collections that throw UnsupportedError on mutation

파일

• NOTES.md
• csx.json
• 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