Build on Rust stable branch #53
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Current plan for syntax extensions is syntex. |
This was referenced Jul 19, 2015
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Run on stable Rust Without the `unstable` Cargo feature, on 64 bit platforms: * `Tendril<_>` is 17 bytes instead of 16. (It has a drop flag.) * `Option<Tendril<_>>` is 18 bytes instead of 16. (It has a drop flag and an explicit tag.) r? @Manishearth Needed for servo/html5ever#53 <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/tendril/14) <!-- Reviewable:end -->
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Run on Rust stable Without `--features unstable`: * `Atom` is 16 bytes instead of 8. (It has a drop flag.) * `ns!` and `atom!` are giant generated macros instead of plugins, and so may increase compile times. r? @glennw, particularly c4fa256. Needed for servo/html5ever#53 <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/string-cache/95) <!-- Reviewable:end -->
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Run on Rust stable When the "unstable" Cargo feature is given, html5ever’s build script will use html5ever_macros as a library to generate or update `src/tree_builder/rules.expanded.rs`, which is part of the source tree. (This feature also enables the corresponding features of tendril and string-cache.) html5ever_macros is not a plugin anymore, but it still uses libsyntax and still behaves a lot like a syntax extension. When "unstable" is *not* given, the build script checks that rules.expanded.rs is up to date (based on a hash of rules.rs) and fails if it’s not. Tests also run on stable Rust on Travis-CI, but unfortunately most of them are disabled as they dynamically generated using internals of the `test` crate. r? @Manishearth Fixes #53 Closes #151 <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/html5ever/151) <!-- Reviewable:end -->
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Not for 1.0 necessarily, but at some point in 1.x.
The biggest obstacle is syntax extensions. I have no clever ideas there except running
rustc-nightly --pretty expandedand shipping that as the 1.x "source".We should catalog all of the other obstacles here.
Servo itself will be on nightlies for a looooong time.
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