findAllRefs: Support anonymous default export (#19302)

Author: Andy

src/services/findAllReferences.ts

@@ -377,19 +377,26 @@ namespace ts.FindAllReferences.Core {
 
         const result: SymbolAndEntries[] = [];
         const state = new State(sourceFiles, /*isForConstructor*/ node.kind === SyntaxKind.ConstructorKeyword, checker, cancellationToken, searchMeaning, options, result);
-        const search = state.createSearch(node, symbol, /*comingFrom*/ undefined, { allSearchSymbols: populateSearchSymbolSet(symbol, node, checker, options.implementations) });
 
-        // Try to get the smallest valid scope that we can limit our search to;
-        // otherwise we'll need to search globally (i.e. include each file).
-        const scope = getSymbolScope(symbol);
-        if (scope) {
-            getReferencesInContainer(scope, scope.getSourceFile(), search, state);
+        if (node.kind === SyntaxKind.DefaultKeyword) {
+            addReference(node, symbol, node, state);
+            searchForImportsOfExport(node, symbol, { exportingModuleSymbol: symbol.parent, exportKind: ExportKind.Default }, state);
         }
         else {
-            // Global search
-            for (const sourceFile of state.sourceFiles) {
-                state.cancellationToken.throwIfCancellationRequested();
-                searchForName(sourceFile, search, state);
+            const search = state.createSearch(node, symbol, /*comingFrom*/ undefined, { allSearchSymbols: populateSearchSymbolSet(symbol, node, checker, options.implementations) });
+
+            // Try to get the smallest valid scope that we can limit our search to;
+            // otherwise we'll need to search globally (i.e. include each file).
+            const scope = getSymbolScope(symbol);
+            if (scope) {
+                getReferencesInContainer(scope, scope.getSourceFile(), search, state);
+            }
+            else {
+                // Global search
+                for (const sourceFile of state.sourceFiles) {
+                    state.cancellationToken.throwIfCancellationRequested();
+                    searchForName(sourceFile, search, state);
+                }
             }
         }
 

tests/cases/fourslash/findAllRefsDefaultImportThroughNamespace.ts

@@ -15,7 +15,7 @@
 
 const [r0, r1, r2, r3, r4] = test.ranges();
 
-verify.referenceGroups([r0], [{ definition: "function f(): void", ranges: [r1, r2] }]);
+verify.referenceGroups([r0], [{ definition: "function f(): void", ranges: [r0, r2] }]);
 verify.singleReferenceGroup("function f(): void", [r1, r2]);
 verify.singleReferenceGroup("(property) default: number", [r3, r4]);
 

tests/cases/fourslash/findAllRefsForDefaultExport_anonymous.ts

@@ -0,0 +1,13 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: /a.ts
+////export [|{| "isDefinition": true, "isWriteAccess": true |}default|] 1;
+
+// @Filename: /b.ts
+////import [|{| "isDefinition": true, "isWriteAccess": true |}a|] from "./a";
+
+const [r0, r1] = test.ranges();
+verify.referenceGroups(r0, [
+    { definition: "(property) default: 1", ranges: [r0] },
+    { definition: "import a", ranges: [r1] },
+]);

tests/cases/fourslash/findAllRefsForDefaultExport_reExport.ts

@@ -10,8 +10,6 @@
 // @Filename: /re-export-dep.ts
 ////import [|{| "isWriteAccess": true, "isDefinition": true |}fooDefault|] from "./re-export";
 
-verify.noErrors();
-
 const [r0, r1, r2, r3] = test.ranges();
 verify.referenceGroups([r0, r1], [
     { definition: "const foo: 1", ranges: [r0, r1] },