1cf592fa40
Refactor away RBML from rustc_metadata.
RBML and `ty{en,de}code` have had their long-overdue purge. Summary of changes:
* Metadata is now a tree encoded in post-order and with relative backward references pointing to children nodes. With auto-deriving and type safety, this makes maintenance and adding new information to metadata painless and bug-free by default. It's also more compact and cache-friendly (cache misses should be proportional to the depth of the node being accessed, not the number of siblings as in EBML/RBML).
* Metadata sizes have been reduced, for `libcore` it went down 16% (`8.38MB` -> `7.05MB`) and for `libstd` 14% (`3.53MB` -> `3.03MB`), while encoding more or less the same information
* Specialization is used in the bundled `libserialize` (crates.io `rustc_serialize` remains unaffected) to customize the encoding (and more importantly, decoding) of various types, most notably those interned in the `TyCtxt`. Some of this abuses a soundness hole pending a fix (cc @aturon), but when that fix arrives, we'll move to macros 1.1 `#[derive]` and custom `TyCtxt`-aware serialization traits.
* Enumerating children of modules from other crates is now orthogonal to describing those items via `Def` - this is a step towards bridging crate-local HIR and cross-crate metadata
* `CrateNum` has been moved to `rustc` and both it and `NodeId` are now newtypes instead of `u32` aliases, for specializing their decoding. This is `[syntax-breaking]` (cc @Manishearth ).
cc @rust-lang/compiler
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| .. | ||
| back | ||
| debuginfo | ||
| mir | ||
| abi.rs | ||
| adt.rs | ||
| asm.rs | ||
| assert_module_sources.rs | ||
| attributes.rs | ||
| base.rs | ||
| basic_block.rs | ||
| build.rs | ||
| builder.rs | ||
| cabi_aarch64.rs | ||
| cabi_arm.rs | ||
| cabi_asmjs.rs | ||
| cabi_mips64.rs | ||
| cabi_mips.rs | ||
| cabi_powerpc64.rs | ||
| cabi_powerpc.rs | ||
| cabi_s390x.rs | ||
| cabi_x86_64.rs | ||
| cabi_x86_win64.rs | ||
| cabi_x86.rs | ||
| callee.rs | ||
| Cargo.toml | ||
| cleanup.rs | ||
| closure.rs | ||
| collector.rs | ||
| common.rs | ||
| consts.rs | ||
| context.rs | ||
| declare.rs | ||
| diagnostics.rs | ||
| disr.rs | ||
| glue.rs | ||
| intrinsic.rs | ||
| lib.rs | ||
| machine.rs | ||
| macros.rs | ||
| meth.rs | ||
| monomorphize.rs | ||
| partitioning.rs | ||
| README.txt | ||
| symbol_map.rs | ||
| symbol_names_test.rs | ||
| trans_item.rs | ||
| tvec.rs | ||
| type_.rs | ||
| type_of.rs | ||
| value.rs | ||
See the README.md in ../librustc.