Here we have *real* interning, producing unique references if and only if the input is unique! Boy am I glad I invested time into this, because it's really fun to work with.
Hopefully my logic regarding Send-ness and Sync-ness aren't completely unsound.
- StringArena provides an arena for immutable strings, inspired by other string interners, and keeps track of the ends of every allocated string. Strings inserted into the arena are assigned a Symbol.
- intern::Interner keeps track of the hashes of each inserted string, and provides deduplication for interned strings. This allows referential comparison between interned strings
- global_intern::GlobalSym provides metered access to a Global Interner, and has a Display implementation which queries the Interner.
The global interner is planned for use in cl-ast.
TODO: the unstable raw_entry API is about to be removed from Rust. Maybe switch to hashbrown, or write my own hash table?
- NameCollects use items
- Preprocesses them
- Uses no fancy algorithms
- Doesn't respect item visibility at all
- *declaration-order-dependent* :(
- works, though! :)
- TODO: Lazy evaluation of literally any of this stuff.
grammar:
- Improve specification of `Path`
- Add `Use` and `UseTree` rules
- Add `Use` as a variant of ItemKind
cl-token:
- Add new keywords `use` and `as`
cl-ast:
- Add nodes for Use and UseTree
- Add new ItemKind for Use
- Implement traversal in Visit and Fold
cl-interpret:
- Mark ItemKind::Use with a todo
cl-parser:
- Update to match grammar
cl-typeck:
- Update to match changes in AST
- Mark UseTrees as NameCollectable and TypeResolvable, but leave as todos
