132 lines
4.1 KiB
Rust
132 lines
4.1 KiB
Rust
//! base_db defines basic database traits. The concrete DB is defined by ide.
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#![warn(rust_2018_idioms, unused_lifetimes)]
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mod input;
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mod change;
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pub mod span;
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use std::panic;
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use rustc_hash::FxHashSet;
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use syntax::{ast, Parse, SourceFile, TextRange, TextSize};
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use triomphe::Arc;
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pub use crate::{
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change::FileChange,
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input::{
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CrateData, CrateDisplayName, CrateGraph, CrateId, CrateName, CrateOrigin, Dependency,
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DependencyKind, Edition, Env, LangCrateOrigin, ProcMacroPaths, ReleaseChannel, SourceRoot,
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SourceRootId, TargetLayoutLoadResult,
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},
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};
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pub use salsa::{self, Cancelled};
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pub use vfs::{file_set::FileSet, AnchoredPath, AnchoredPathBuf, FileId, VfsPath};
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#[macro_export]
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macro_rules! impl_intern_key {
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($name:ident) => {
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impl $crate::salsa::InternKey for $name {
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fn from_intern_id(v: $crate::salsa::InternId) -> Self {
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$name(v)
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}
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fn as_intern_id(&self) -> $crate::salsa::InternId {
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self.0
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}
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}
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};
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}
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pub trait Upcast<T: ?Sized> {
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fn upcast(&self) -> &T;
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}
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#[derive(Clone, Copy, Debug)]
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pub struct FilePosition {
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pub file_id: FileId,
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pub offset: TextSize,
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}
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#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
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pub struct FileRange {
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pub file_id: FileId,
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pub range: TextRange,
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}
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pub const DEFAULT_PARSE_LRU_CAP: usize = 128;
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pub trait FileLoader {
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/// Text of the file.
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fn file_text(&self, file_id: FileId) -> Arc<str>;
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fn resolve_path(&self, path: AnchoredPath<'_>) -> Option<FileId>;
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fn relevant_crates(&self, file_id: FileId) -> Arc<FxHashSet<CrateId>>;
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}
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/// Database which stores all significant input facts: source code and project
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/// model. Everything else in rust-analyzer is derived from these queries.
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#[salsa::query_group(SourceDatabaseStorage)]
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pub trait SourceDatabase: FileLoader + std::fmt::Debug {
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/// Parses the file into the syntax tree.
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fn parse(&self, file_id: FileId) -> Parse<ast::SourceFile>;
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/// The crate graph.
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#[salsa::input]
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fn crate_graph(&self) -> Arc<CrateGraph>;
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}
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fn parse(db: &dyn SourceDatabase, file_id: FileId) -> Parse<ast::SourceFile> {
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let _p = profile::span("parse_query").detail(|| format!("{file_id:?}"));
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let text = db.file_text(file_id);
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SourceFile::parse(&text)
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}
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/// We don't want to give HIR knowledge of source roots, hence we extract these
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/// methods into a separate DB.
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#[salsa::query_group(SourceDatabaseExtStorage)]
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pub trait SourceDatabaseExt: SourceDatabase {
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#[salsa::input]
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fn file_text(&self, file_id: FileId) -> Arc<str>;
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/// Path to a file, relative to the root of its source root.
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/// Source root of the file.
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#[salsa::input]
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fn file_source_root(&self, file_id: FileId) -> SourceRootId;
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/// Contents of the source root.
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#[salsa::input]
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fn source_root(&self, id: SourceRootId) -> Arc<SourceRoot>;
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fn source_root_crates(&self, id: SourceRootId) -> Arc<FxHashSet<CrateId>>;
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}
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fn source_root_crates(db: &dyn SourceDatabaseExt, id: SourceRootId) -> Arc<FxHashSet<CrateId>> {
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let graph = db.crate_graph();
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let res = graph
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.iter()
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.filter(|&krate| {
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let root_file = graph[krate].root_file_id;
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db.file_source_root(root_file) == id
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})
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.collect();
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Arc::new(res)
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}
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/// Silly workaround for cyclic deps between the traits
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pub struct FileLoaderDelegate<T>(pub T);
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impl<T: SourceDatabaseExt> FileLoader for FileLoaderDelegate<&'_ T> {
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fn file_text(&self, file_id: FileId) -> Arc<str> {
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SourceDatabaseExt::file_text(self.0, file_id)
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}
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fn resolve_path(&self, path: AnchoredPath<'_>) -> Option<FileId> {
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// FIXME: this *somehow* should be platform agnostic...
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let source_root = self.0.file_source_root(path.anchor);
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let source_root = self.0.source_root(source_root);
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source_root.resolve_path(path)
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}
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fn relevant_crates(&self, file_id: FileId) -> Arc<FxHashSet<CrateId>> {
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let _p = profile::span("relevant_crates");
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let source_root = self.0.file_source_root(file_id);
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self.0.source_root_crates(source_root)
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}
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}
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