Merge pull request #29218 from uniqueiniquity/jsdocSpanForVarStatement

Jsdoc span for var statement

src/compiler/utilities.ts

@@ -2121,7 +2121,7 @@ namespace ts {
             : undefined;
     }
 
-    function getSingleInitializerOfVariableStatementOrPropertyDeclaration(node: Node): Expression | undefined {
+    export function getSingleInitializerOfVariableStatementOrPropertyDeclaration(node: Node): Expression | undefined {
         switch (node.kind) {
             case SyntaxKind.VariableStatement:
                 const v = getSingleVariableOfVariableStatement(node);

src/services/outliningElementsCollector.ts

@@ -37,6 +37,10 @@ namespace ts.OutliningElementsCollector {
                 addOutliningForLeadingCommentsForNode(n, sourceFile, cancellationToken, out);
             }
 
+            if (isFunctionExpressionAssignedToVariable(n)) {
+                addOutliningForLeadingCommentsForNode(n.parent.parent.parent, sourceFile, cancellationToken, out);
+            }
+
             const span = getOutliningSpanForNode(n, sourceFile);
             if (span) out.push(span);
 
@@ -54,6 +58,14 @@ namespace ts.OutliningElementsCollector {
             }
             depthRemaining++;
         }
+
+        function isFunctionExpressionAssignedToVariable(n: Node) {
+            if (!isFunctionExpression(n) && !isArrowFunction(n)) {
+                return false;
+            }
+            const ancestor = findAncestor(n, isVariableStatement);
+            return !!ancestor && getSingleInitializerOfVariableStatementOrPropertyDeclaration(ancestor) === n;
+        }
     }
 
     function addRegionOutliningSpans(sourceFile: SourceFile, out: Push<OutliningSpan>): void {

tests/cases/fourslash/getOutliningForBlockComments.ts

@@ -99,6 +99,17 @@
 ////    return 1;
 ////  }|]
 ////}|]
+////
+////// Over a function expression assigned to a variable
+//// [|/**
+////  * Return a sum
+////  * @param {Number} y
+////  * @param {Number} z
+////  * @returns {Number} the sum of y and z
+////  */|]
+//// const sum2 = (y, z) =>[| {
+////     return y + z;
+//// }|];
 
 verify.outliningSpansInCurrentFile(test.ranges());