From 58f6f3daf27d612ec12a45d3bf02c2bd161f7285 Mon Sep 17 00:00:00 2001
From: kingwl <kingwenlu@gmail.com>
Date: Wed, 22 Jul 2020 19:21:12 +0800
Subject: [PATCH] merge helper function

---
 src/compiler/checker.ts | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 7265057fa8e63..8c7bf1f6b20c0 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -27536,30 +27536,23 @@ namespace ts {
 
         function checkDeprecatedSignature(signature: Signature, node: CallLikeExpression) {
             if (signature.declaration && signature.declaration.flags & NodeFlags.Deprecated) {
-                const suggestionNode = getSignatureSuggestionNode(node);
+                const suggestionNode = getDeprecatedSuggestionNode(node);
                 errorOrSuggestion(/*isError*/ false, suggestionNode, Diagnostics._0_is_deprecated, signatureToString(signature));
             }
         }
 
-        function getSignatureSuggestionNode(node: CallLikeExpression): Node {
+        function getDeprecatedSuggestionNode(node: Node): Node {
+            node = skipParentheses(node);
             switch (node.kind) {
                 case SyntaxKind.CallExpression:
                 case SyntaxKind.Decorator:
                 case SyntaxKind.NewExpression:
-                    return getDeprecatedSuggestionNode(node.expression);
+                    return getDeprecatedSuggestionNode((<Decorator | CallExpression | NewExpression>node).expression);
                 case SyntaxKind.TaggedTemplateExpression:
-                    return getDeprecatedSuggestionNode(node.tag);
+                    return getDeprecatedSuggestionNode((<TaggedTemplateExpression>node).tag);
                 case SyntaxKind.JsxOpeningElement:
                 case SyntaxKind.JsxSelfClosingElement:
-                    return getDeprecatedSuggestionNode(node.tagName);
-                default:
-                    return Debug.assertNever(node);
-            }
-        }
-
-        function getDeprecatedSuggestionNode(node: Node): Node {
-            node = skipParentheses(node);
-            switch (node.kind) {
+                    return getDeprecatedSuggestionNode((<JsxOpeningLikeElement>node).tagName);
                 case SyntaxKind.ElementAccessExpression:
                     return (<ElementAccessExpression>node).argumentExpression;
                 case SyntaxKind.PropertyAccessExpression: