Note metadata format

Metadata is specified in the .note.rustc section of a crate. The metadata is in EBML format.

Schema

TODO: This is incomplete.

The schema is given in pseudo-BNF. Some nonterminals are delimited by EBML tags; for these, the tag that surrounds the data is given in parentheses, for brevity. (For example, foo (TAG_FOO) ::== bar is really foo ::== TAG_FOO bar END_TAG_FOO.)

crate ::== crate-hash attributes crate-deps tag-paths tag-items

crate-hash (TAG_CRATE_HASH) ::== crate-hash*

attributes (TAG_ATTRIBUTE) ::== attribute*

crate-deps (TAG_CRATE_DEPS) ::== crate-dep*

paths (TAG_PATHS) ::== paths-paths paths-index

paths-paths (TAG_PATHS) ::== paths-data*

items (TAG_ITEMS) ::== items-data* items-index