rust-analyzer/crates/hir/src/db.rs

//! Re-exports various subcrates databases so that the calling code can depend
//! only on `hir`. This breaks abstraction boundary a bit, it would be cool if
//! we didn't do that.
//!
//! But we need this for at least LRU caching at the query level.
pub use hir_def::db::*;
pub use hir_expand::db::{
    AstIdMapQuery, DeclMacroExpanderQuery, ExpandDatabase, ExpandDatabaseStorage,
    ExpandProcMacroQuery, InternMacroCallQuery, MacroArgQuery, MacroExpandQuery,
    ParseMacroExpansionErrorQuery, ParseMacroExpansionQuery,
};
pub use hir_ty::db::*;