Merge pull request #10407 from zhengbli/fixJsDocSyntacticClassification

Return non-JsDocComment children for syntactic classification

src/compiler/utilities.ts

@@ -301,6 +301,10 @@ namespace ts {
         return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
     }
 
+    export function isJSDocTag(node: Node) {
+        return node.kind >= SyntaxKind.FirstJSDocTagNode && node.kind <= SyntaxKind.LastJSDocTagNode;
+    }
+
     export function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
         if (nodeIsMissing(node) || !node.decorators) {
             return getTokenPosOfNode(node, sourceFile);

src/services/services.ts

@@ -299,6 +299,10 @@ namespace ts {
                         processNode(jsDocComment);
                     }
                 }
+                // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
+                // For that to work, the jsdoc comments should still be the leading trivia of the first child. 
+                // Restoring the scanner position ensures that. 
+                pos = this.pos;
                 forEachChild(this, processNode, processNodes);
                 if (pos < this.end) {
                     this.addSyntheticNodes(children, pos, this.end);
@@ -7596,6 +7600,10 @@ namespace ts {
              * False will mean that node is not classified and traverse routine should recurse into node contents.
              */
             function tryClassifyNode(node: Node): boolean {
+                if (isJSDocTag(node)) {
+                    return true;
+                }
+
                 if (nodeIsMissing(node)) {
                     return true;
                 }

tests/cases/fourslash/syntacticClassificationsDocComment4.ts

@@ -0,0 +1,24 @@
+/// <reference path="fourslash.ts"/>
+
+//// /** @param {number} p1 */
+//// function foo(p1) {}
+
+var c = classification;
+verify.syntacticClassificationsAre(
+    c.comment("/** "),
+    c.punctuation("@"),
+    c.docCommentTagName("param"),
+    c.comment(" "),
+    c.punctuation("{"),
+    c.keyword("number"),
+    c.punctuation("}"),
+    c.comment(" "),
+    c.parameterName("p1"),
+    c.comment(" */"),
+    c.keyword("function"),
+    c.identifier("foo"),
+    c.punctuation("("),
+    c.parameterName("p1"),
+    c.punctuation(")"),
+    c.punctuation("{"),
+    c.punctuation("}"));