[sentry-junior]

Makes Usecase::from_static a const fn, so an invalid name fails compilation when it's evaluated in a const context, and a Usecase can live in a plain static without LazyLock:

static ATTACHMENTS: Usecase = Usecase::from_static("attachments");  // ok
static BROKEN: Usecase = Usecase::from_static("attachments/v2");     // compile error

Outside a const context it still panics at runtime, as before, now reporting the caller's location.

Most of the change is in objectstore_types::usecase::Usecase. It now stores either a &'static str or an Arc<str> and gains a const fn from_static alongside new, with validation kept private to the module. Arc::new can't run in a const fn, so this is what makes a const constructor possible. Equality, ordering, hashing, serialization, and Debug use the name string, so static and dynamic names behave the same.

Since validation runs in a const fn, InvalidUsecaseName::InvalidChar now reports the byte position of the first invalid character instead of the character, which keeps validation free of UTF-8 decoding. Usecase::new in the types crate takes impl AsRef<str> instead of impl Into<String> and allocates the name once.

The client only swaps its Arc<UsecaseName> field for UsecaseName and forwards from_static to the types crate.

Changelog Entry

• Usecase::from_static is now a const fn
  • A Usecase can be a plain static without LazyLock, and an invalid name fails at compile time when evaluated in a const context.
  • InvalidUsecaseName::InvalidChar now holds the byte position of the invalid character instead of the character.

via @lcian.

--

View Junior Session [Sentry]

[codecov]

Codecov Report

❌ Patch coverage is 87.15596% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.50%. Comparing base (764b52c) to head (fd73290).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
objectstore-types/src/usecase.rs	84.94%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #712      +/-   ##
==========================================
- Coverage   91.55%   91.50%   -0.05%     
==========================================
  Files         116      116              
  Lines       22088    22175      +87     
==========================================
+ Hits        20222    20292      +70     
- Misses       1866     1883      +17     

Components	Coverage Δ
Rust Backend	94.68% <84.94%> (-0.06%)	⬇️
Rust Client	84.41% <100.00%> (+0.12%)	⬆️
Python Client	93.88% <ø> (ø)

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[github-actions]

Semver Impact of This PR

This PR lands in these workspaces:

• clients/rust: 🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

New Features

• Usecase::from_static is now a const fn by lcian and jan-auer with sentry-junior in #712
  • A Usecase can be a plain static without LazyLock, and an invalid name fails at compile time when evaluated in a const context.
  • InvalidUsecaseName::InvalidChar now holds the byte position of the invalid character instead of the character.
• via @lcian. by lcian and jan-auer with sentry-junior in #712
• -- by lcian and jan-auer with sentry-junior in #712
• View Junior Session [Sentry] by lcian and jan-auer with sentry-junior in #712

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_{🤖 This preview updates automatically when you update the PR.}