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facet-rs / facet / 20040754791 / 1
58%
main: 58%

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DEFAULT BRANCH: main
Ran 08 Dec 2025 07:49PM UTC
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08 Dec 2025 07:47PM UTC coverage: 59.082% (+0.04%) from 59.04%
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fasterthanlime
feat(facet-reflect): add CovariantPeek for covariant types

Adds a CovariantPeek wrapper that is covariant over 'facet, unlike
the invariant Peek. This allows storing multiple values with different
lifetimes in a single collection without repeated shrink_lifetime calls.

CovariantPeek verifies at construction time that the underlying type
is actually covariant, making the lifetime covariance safe. It Derefs
to Peek, avoiding code duplication.

This addresses the use case discussed in PR #1170 comments by
@manuel-woelker and @fasterthanlime.

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