Support services for @typedef (#16087)

* Support services for @typedef

* Ensure JSDocTypeReference has SemanticMeaning.Type

* Get SemanticMeaning right

src/compiler/types.ts

@@ -2102,6 +2102,7 @@ namespace ts {
     }
 
     export interface JSDocTag extends Node {
+        parent: JSDoc;
         atToken: AtToken;
         tagName: Identifier;
         comment: string | undefined;
@@ -2132,6 +2133,7 @@ namespace ts {
     }
 
     export interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
+        parent: JSDoc;
         kind: SyntaxKind.JSDocTypedefTag;
         fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;
@@ -2140,6 +2142,7 @@ namespace ts {
     }
 
     export interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        parent: JSDoc;
         kind: SyntaxKind.JSDocPropertyTag;
         name: Identifier;
         typeExpression: JSDocTypeExpression;

src/compiler/utilities.ts

@@ -288,6 +288,14 @@ namespace ts {
         return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
     }
 
+    export function isJSDoc(node: Node): node is JSDoc {
+        return node.kind === SyntaxKind.JSDocComment;
+    }
+
+    export function isJSDocTypedefTag(node: Node): node is JSDocTypedefTag {
+        return node.kind === SyntaxKind.JSDocTypedefTag;
+    }
+
     export function isJSDocTag(node: Node) {
         return node.kind >= SyntaxKind.FirstJSDocTagNode && node.kind <= SyntaxKind.LastJSDocTagNode;
     }
@@ -1551,6 +1559,10 @@ namespace ts {
     }
 
    export function getJSDocs(node: Node): (JSDoc | JSDocTag)[] {
+        if (isJSDocTypedefTag(node)) {
+            return [node.parent];
+        }
+
         let cache: (JSDoc | JSDocTag)[] = node.jsDocCache;
         if (!cache) {
             getJSDocsWorker(node);

src/services/findAllReferences.ts

@@ -784,7 +784,8 @@ namespace ts.FindAllReferences.Core {
             return;
         }
 
-        for (const position of getPossibleSymbolReferencePositions(sourceFile, search.text, container, /*fullStart*/ state.options.findInComments || container.jsDoc !== undefined)) {
+        const fullStart = state.options.findInComments || container.jsDoc !== undefined || forEach(search.symbol.declarations, d => d.kind === ts.SyntaxKind.JSDocTypedefTag);
+        for (const position of getPossibleSymbolReferencePositions(sourceFile, search.text, container, fullStart)) {
             getReferencesAtLocation(sourceFile, position, search, state);
         }
     }

src/services/goToDefinition.ts

@@ -8,7 +8,7 @@ namespace ts.GoToDefinition {
             if (referenceFile) {
                 return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
             }
-            return undefined;
+            // Might still be on jsdoc, so keep looking.
         }
 
         // Type reference directives

src/services/utilities.ts

@@ -39,13 +39,14 @@ namespace ts {
             case SyntaxKind.TypeLiteral:
                 return SemanticMeaning.Type;
 
+            case SyntaxKind.JSDocTypedefTag:
+                // If it has no name node, it shares the name with the value declaration below it.
+                return (node as JSDocTypedefTag).name === undefined ? SemanticMeaning.Value | SemanticMeaning.Type : SemanticMeaning.Type;
+
             case SyntaxKind.EnumMember:
             case SyntaxKind.ClassDeclaration:
                 return SemanticMeaning.Value | SemanticMeaning.Type;
 
-            case SyntaxKind.EnumDeclaration:
-                return SemanticMeaning.All;
-
             case SyntaxKind.ModuleDeclaration:
                 if (isAmbientModule(<ModuleDeclaration>node)) {
                     return SemanticMeaning.Namespace | SemanticMeaning.Value;
@@ -57,6 +58,7 @@ namespace ts {
                     return SemanticMeaning.Namespace;
                 }
 
+            case SyntaxKind.EnumDeclaration:
             case SyntaxKind.NamedImports:
             case SyntaxKind.ImportSpecifier:
             case SyntaxKind.ImportEqualsDeclaration:
@@ -70,7 +72,7 @@ namespace ts {
                 return SemanticMeaning.Namespace | SemanticMeaning.Value;
         }
 
-        return SemanticMeaning.Value | SemanticMeaning.Type | SemanticMeaning.Namespace;
+        return SemanticMeaning.All;
     }
 
     export function getMeaningFromLocation(node: Node): SemanticMeaning {
@@ -78,7 +80,7 @@ namespace ts {
             return SemanticMeaning.Value;
         }
         else if (node.parent.kind === SyntaxKind.ExportAssignment) {
-            return SemanticMeaning.Value | SemanticMeaning.Type | SemanticMeaning.Namespace;
+            return SemanticMeaning.All;
         }
         else if (isInRightSideOfImport(node)) {
             return getMeaningFromRightHandSideOfImportEquals(node);
@@ -162,10 +164,22 @@ namespace ts {
             node = node.parent;
         }
 
-        return node.parent.kind === SyntaxKind.TypeReference ||
-            (node.parent.kind === SyntaxKind.ExpressionWithTypeArguments && !isExpressionWithTypeArgumentsInClassExtendsClause(<ExpressionWithTypeArguments>node.parent)) ||
-            (node.kind === SyntaxKind.ThisKeyword && !isPartOfExpression(node)) ||
-            node.kind === SyntaxKind.ThisType;
+        switch (node.kind) {
+            case SyntaxKind.ThisKeyword:
+                return !isPartOfExpression(node);
+            case SyntaxKind.ThisType:
+                return true;
+        }
+
+        switch (node.parent.kind) {
+            case SyntaxKind.TypeReference:
+            case SyntaxKind.JSDocTypeReference:
+                return true;
+            case SyntaxKind.ExpressionWithTypeArguments:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(<ExpressionWithTypeArguments>node.parent);
+        }
+
+        return false;
     }
 
     export function isCallExpressionTarget(node: Node): boolean {

tests/cases/fourslash/jsdocTypedefTagSemanticMeaning0.ts

@@ -0,0 +1,16 @@
+///<reference path="fourslash.ts" />
+
+// @allowJs: true
+// @Filename: a.js
+
+/////** @typedef {number} [|{| "isWriteAccess": true, "isDefinition": true |}T|] */
+
+////const [|{| "isWriteAccess": true, "isDefinition": true |}T|] = 1;
+
+/////** @type {[|T|]} */
+////const n = [|T|];
+
+const [t0, v0, t1, v1] = test.ranges();
+
+verify.singleReferenceGroup("type T = number\nconst T: 1", [t0, t1]);
+verify.singleReferenceGroup("type T = number\nconst T: 1", [v0, v1]);

tests/cases/fourslash/jsdocTypedefTagSemanticMeaning1.ts

@@ -0,0 +1,12 @@
+///<reference path="fourslash.ts" />
+
+// @allowJs: true
+// @Filename: a.js
+
+/////** @typedef {number} */
+////const [|{| "isWriteAccess": true, "isDefinition": true |}T|] = 1;
+
+/////** @type {[|T|]} */
+////const n = [|T|];
+
+verify.singleReferenceGroup("type T = number\nconst T: 1");

tests/cases/fourslash/jsdocTypedefTagServices.ts

@@ -0,0 +1,28 @@
+///<reference path="fourslash.ts" />
+
+// @allowJs: true
+// @Filename: a.js
+
+/////**
+//// * Doc comment
+//// * @typedef /*def*/[|{| "isWriteAccess": true, "isDefinition": true |}Product|]
+//// * @property {string} title
+//// */
+
+/////**
+//// * @type {/*use*/[|Product|]}
+//// */
+////const product = null;
+
+const desc = `type Product = {
+    title: string;
+}`;
+
+verify.quickInfoAt("use", desc, "Doc comment");
+
+verify.goToDefinition("use", "def");
+
+verify.rangesAreOccurrences();
+verify.rangesAreDocumentHighlights();
+verify.singleReferenceGroup(desc);
+verify.rangesAreRenameLocations();