1 files changed, 83 insertions, 0 deletions

diff --git a/crates/ra_analysis/src/db/input.rs b/crates/ra_analysis/src/db/input.rs
new file mode 100644
index 000000000..957d082f9
--- /dev/null
+++ b/crates/ra_analysis/src/db/input.rs
@@ -0,0 +1,83 @@
+use std::{
+    sync::Arc,
+    hash::{Hasher, Hash},
+};
+
+use salsa;
+use rustc_hash::FxHashSet;
+
+use crate::{FileId, FileResolverImp, CrateGraph, symbol_index::SymbolIndex};
+
+salsa::query_group! {
+    pub(crate) trait FilesDatabase: salsa::Database {
+        fn file_text(file_id: FileId) -> Arc<String> {
+            type FileTextQuery;
+            storage input;
+        }
+        fn file_source_root(file_id: FileId) -> SourceRootId {
+            type FileSourceRootQuery;
+            storage input;
+        }
+        fn source_root(id: SourceRootId) -> Arc<SourceRoot> {
+            type SourceRootQuery;
+            storage input;
+        }
+        fn libraries() -> Arc<Vec<SourceRootId>> {
+            type LibrarieseQuery;
+            storage input;
+        }
+        fn library_symbols(id: SourceRootId) -> Arc<SymbolIndex> {
+            type LibrarySymbolsQuery;
+            storage input;
+        }
+        fn crate_graph() -> Arc<CrateGraph> {
+            type CrateGraphQuery;
+            storage input;
+        }
+    }
+}
+
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub(crate) struct SourceRootId(pub(crate) u32);
+
+#[derive(Clone, Default, Debug, Eq)]
+pub(crate) struct SourceRoot {
+    pub(crate) file_resolver: FileResolverImp,
+    pub(crate) files: FxHashSet<FileId>,
+}
+
+impl PartialEq for SourceRoot {
+    fn eq(&self, other: &SourceRoot) -> bool {
+        self.file_resolver == other.file_resolver
+    }
+}
+
+impl Hash for SourceRoot {
+    fn hash<H: Hasher>(&self, hasher: &mut H) {
+        self.file_resolver.hash(hasher);
+    }
+}
+
+pub(crate) const WORKSPACE: SourceRootId = SourceRootId(0);
+
+
+#[derive(Default, Debug, Eq)]
+pub(crate) struct FileSet {
+    pub(crate) files: FxHashSet<FileId>,
+    pub(crate) resolver: FileResolverImp,
+}
+
+impl PartialEq for FileSet {
+    fn eq(&self, other: &FileSet) -> bool {
+        self.files == other.files && self.resolver == other.resolver
+    }
+}
+
+impl Hash for FileSet {
+    fn hash<H: Hasher>(&self, hasher: &mut H) {
+        let mut files = self.files.iter().cloned().collect::<Vec<_>>();
+        files.sort();
+        files.hash(hasher);
+    }
+}
+