7b:I[154500,[["$2",["$3","$4"],[14451,1389]],["$5",["$6","$7","$8","$9","$a","$b"],[40076,28925,10525,30632,7744,72054]]],"IconMark"] 78:T4c6,## Summary - preserve concrete device types through `DeviceBuilder` and validate engine-device pairs before type erasure - add the extensible `DeviceFor` marker trait, a centralized `BlockEngine` compatibility list, and targeted compiler diagnostics - expose concrete device and partition types needed by downstream implementations - move runtime device selection in `foyer-bench` after static engine-config construction - add compile-pass and compile-fail coverage for built-in pairs and downstream extension paths - keep compile-time UI tests isolated from the madsim runtime feature set - align the local `cargo x` license step with CI's HawkEye configuration ## API compatibility - `DeviceBuilder` now declares an associated `Device` type and returns `Arc` - `BlockEngineConfig::new` requires the concrete device type to implement `DeviceFor` - callers that erase a device to `Arc` before engine construction must delay erasure or erase the completed `EngineConfig` instead ## Testing - `cargo x --fast` - `RUSTFLAGS='--cfg tokio_unstable --cfg madsim' cargo nextest run --workspace --exclude foyer-bench --exclude examples --no-default-features --features 'runtime-madsim-tokio'` 79:T17f3,## [Codecov](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?dropdown=coverage&src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs) Report :x: Patch coverage is `88.23529%` with `4 lines` in your changes missing coverage. Please review. | [Files with missing lines](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs) | Patch % | Lines | |---|---|---| | [foyer-bench/src/main.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-bench%2Fsrc%2Fmain.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItYmVuY2gvc3JjL21haW4ucnM=) | 86.95% | [3 Missing :warning: ](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs) | | [foyer-storage/src/io/device/partial.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fio%2Fdevice%2Fpartial.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvaW8vZGV2aWNlL3BhcnRpYWwucnM=) | 0.00% | [1 Missing :warning: ](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs) | | [Files with missing lines](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs) | Coverage Δ | | |---|---|---| | [foyer-common/src/error.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-common%2Fsrc%2Ferror.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItY29tbW9uL3NyYy9lcnJvci5ycw==) | `74.09% <ø> (ø)` | | | [foyer-storage/src/engine/block/engine.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fengine%2Fblock%2Fengine.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvZW5naW5lL2Jsb2NrL2VuZ2luZS5ycw==) | `93.56% <100.00%> (+0.02%)` | :arrow_up: | | [foyer-storage/src/engine/block/tombstone.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fengine%2Fblock%2Ftombstone.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvZW5naW5lL2Jsb2NrL3RvbWJzdG9uZS5ycw==) | `96.66% <ø> (ø)` | | | [foyer-storage/src/engine/mod.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fengine%2Fmod.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvZW5naW5lL21vZC5ycw==) | `53.12% <ø> (ø)` | | | [foyer-storage/src/io/device/combined.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fio%2Fdevice%2Fcombined.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvaW8vZGV2aWNlL2NvbWJpbmVkLnJz) | `71.42% <100.00%> (ø)` | | | [foyer-storage/src/io/device/file.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fio%2Fdevice%2Ffile.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvaW8vZGV2aWNlL2ZpbGUucnM=) | `62.50% <100.00%> (-0.36%)` | :arrow_down: | | [foyer-storage/src/io/device/fs.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fio%2Fdevice%2Ffs.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvaW8vZGV2aWNlL2ZzLnJz) | `91.75% <100.00%> (-0.09%)` | :arrow_down: | | [foyer-storage/src/io/device/mod.rs](https://app.codecov.io/gh/foyer-rs/foyer/pull/1321?src=pr&el=tree&filepath=foyer-storage%2Fsrc%2Fio%2Fdevice%2Fmod.rs&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=foyer-rs#diff-Zm95ZXItc3RvcmFnZS9zcmMvaW8vZGV2aWNlL21vZC5ycw==) | `100.00% <ø> (ø)` | | | 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Commits on Sat, Aug 29, 2026