Aaron Hill b9653568a7 Encode less metadata for proc-macro crates ... Currently, we serialize the same crate metadata for proc-macro crates as we do for normal crates. This is quite wasteful - almost none of this metadata is ever used, and much of it can't even be deserialized (if it contains a foreign `CrateNum`). This PR changes metadata encoding to skip encoding the majority of crate metadata for proc-macro crates. Most of the `Lazy<[T]>` fields are left completetly empty, while the non-lazy fields are left as-is. Additionally, proc-macros now have a def span that does not include their body. This was done for normal functions in #75465, but was missed for proc-macros. As a result of this PR, we should only ever encode local `CrateNum`s when encoding proc-macro crates. I've added a specialized serialization impl for `CrateNum` to assert this.		2020-09-26 12:26:27 -04:00
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src	Encode less metadata for proc-macro crates	2020-09-26 12:26:27 -04:00
Cargo.toml	Don't query unstable data when staged_api is off	2020-09-13 02:10:39 +02:00