Replace HasSource usages with Semantics equivalent

Author: Veykril

crates/hir/src/has_source.rs

@@ -16,6 +16,9 @@ use crate::{
 
 pub trait HasSource {
     type Ast;
+    /// Fetches the definition's source node.
+    /// Using [`crate::Semantics::source`] is preferred when working with [`crate::Semantics`],
+    /// as that caches the parsed file in the semantics' cache.
     fn source(self, db: &dyn HirDatabase) -> Option<InFile<Self::Ast>>;
 }
 

crates/hir/src/semantics.rs

@@ -443,17 +443,15 @@ impl<'db> SemanticsImpl<'db> {
     fn expand(&self, macro_call: &ast::MacroCall) -> Option<SyntaxNode> {
         let sa = self.analyze_no_infer(macro_call.syntax());
         let file_id = sa.expand(self.db, InFile::new(sa.file_id, macro_call))?;
-        let node = self.db.parse_or_expand(file_id)?;
-        self.cache(node.clone(), file_id);
+        let node = self.parse_or_expand(file_id)?;
         Some(node)
     }
 
     fn expand_attr_macro(&self, item: &ast::Item) -> Option<SyntaxNode> {
         let src = self.find_file(item.syntax()).with_value(item.clone());
         let macro_call_id = self.with_ctx(|ctx| ctx.item_to_macro_call(src))?;
         let file_id = macro_call_id.as_file();
-        let node = self.db.parse_or_expand(file_id)?;
-        self.cache(node.clone(), file_id);
+        let node = self.parse_or_expand(file_id)?;
         Some(node)
     }
 
@@ -750,9 +748,8 @@ impl<'db> SemanticsImpl<'db> {
     }
 
     fn diagnostics_display_range(&self, src: InFile<SyntaxNodePtr>) -> FileRange {
-        let root = self.db.parse_or_expand(src.file_id).unwrap();
+        let root = self.parse_or_expand(src.file_id).unwrap();
         let node = src.value.to_node(&root);
-        self.cache(root, src.file_id);
         src.with_value(&node).original_file_range(self.db.upcast())
     }
 

crates/ide_completion/src/completions/trait_impl.rs

@@ -31,7 +31,7 @@
 //! }
 //! ```
 
-use hir::{self, HasAttrs, HasSource};
+use hir::{self, HasAttrs};
 use ide_db::{path_transform::PathTransform, traits::get_missing_assoc_items, SymbolKind};
 use syntax::{
     ast::{self, edit_in_place::AttrsOwnerEdit},
@@ -151,7 +151,7 @@ fn add_function_impl(
 
     let range = replacement_range(ctx, fn_def_node);
 
-    if let Some(source) = func.source(ctx.db) {
+    if let Some(source) = ctx.sema.source(func) {
         let assoc_item = ast::AssocItem::Fn(source.value);
         if let Some(transformed_item) = get_transformed_assoc_item(ctx, assoc_item, impl_def) {
             let transformed_fn = match transformed_item {
@@ -189,7 +189,7 @@ fn get_transformed_assoc_item(
         target_scope,
         source_scope,
         trait_,
-        impl_def.source(ctx.db)?.value,
+        ctx.sema.source(impl_def)?.value,
     );
 
     transform.apply(assoc_item.syntax());
@@ -227,7 +227,7 @@ fn add_const_impl(
     let const_name = const_.name(ctx.db).map(|n| n.to_smol_str());
 
     if let Some(const_name) = const_name {
-        if let Some(source) = const_.source(ctx.db) {
+        if let Some(source) = ctx.sema.source(const_) {
             let assoc_item = ast::AssocItem::Const(source.value);
             if let Some(transformed_item) = get_transformed_assoc_item(ctx, assoc_item, impl_def) {
                 let transformed_const = match transformed_item {

crates/ide_completion/src/render/macro_.rs

@@ -1,8 +1,8 @@
 //! Renderer for macro invocations.
 
 use either::Either;
-use hir::{db::HirDatabase, Documentation, HasSource};
-use ide_db::SymbolKind;
+use hir::{Documentation, HasSource, InFile, Semantics};
+use ide_db::{RootDatabase, SymbolKind};
 use syntax::{
     display::{fn_as_proc_macro_label, macro_label},
     SmolStr,
@@ -30,8 +30,6 @@ fn render(
     macro_: hir::MacroDef,
     import_to_add: Option<ImportEdit>,
 ) -> CompletionItem {
-    let db = completion.db;
-
     let source_range = if completion.is_immediately_after_macro_bang() {
         cov_mark::hit!(completes_macro_call_if_cursor_at_bang_token);
         completion.token.parent().map_or_else(|| ctx.source_range(), |it| it.text_range())
@@ -54,7 +52,7 @@ fn render(
         label(&ctx, needs_bang, bra, ket, &name),
     );
     item.set_deprecated(ctx.is_deprecated(macro_))
-        .set_detail(detail(db, macro_))
+        .set_detail(detail(&completion.sema, macro_))
         .set_documentation(docs);
 
     if let Some(import_to_add) = import_to_add {
@@ -104,9 +102,11 @@ fn banged_name(name: &str) -> SmolStr {
     SmolStr::from_iter([name, "!"])
 }
 
-fn detail(db: &dyn HirDatabase, macro_: hir::MacroDef) -> Option<String> {
+fn detail(sema: &Semantics<RootDatabase>, macro_: hir::MacroDef) -> Option<String> {
     // FIXME: This is parsing the file!
-    let detail = match macro_.source(db)?.value {
+    let InFile { file_id, value } = macro_.source(sema.db)?;
+    let _ = sema.parse_or_expand(file_id);
+    let detail = match value {
         Either::Left(node) => macro_label(&node),
         Either::Right(node) => fn_as_proc_macro_label(&node),
     };