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47 строки
1.2 KiB
Markdown
47 строки
1.2 KiB
Markdown
# The `js` Crate: Rust Bindings to SpiderMonkey
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[User Documentation](http://doc.servo.org/js/)
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## Building
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To build a release version of SpiderMonkey and the Rust code with optimizations
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enabled:
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```
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$ cargo build --release
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```
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To build with SpiderMonkey's DEBUG checks and assertions:
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```
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$ cargo build --features debugmozjs
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```
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Raw FFI bindings to JSAPI are machine generated with
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[`rust-lang-nursery/rust-bindgen`][bindgen], and requires libclang >= 3.9. See
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`./build.rs` for details.
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[bindgen]: https://github.com/rust-lang-nursery/rust-bindgen
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## Cargo Features
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* `debugmozjs`: Create a DEBUG build of SpiderMonkey with many extra assertions
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enabled. This is decoupled from whether the crate and its Rust code is built
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in debug or release mode.
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* `promises`: Enable SpiderMonkey native promises.
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* `nonzero`: Leverage the unstable `NonZero` type. Requires nightly Rust.
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## Testing
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Make sure to test both with and without the `debugmozjs` feature because various
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structures have different sizes and get passed through functions differently at
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the ABI level! At minimum, you should test with `debugmozjs` to get extra
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assertions and checking.
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```
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$ cargo test
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$ cargo test --features debugmozjs
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```
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