From 5a3a64028c56a658623e8e877eb252b33f29a69d Mon Sep 17 00:00:00 2001
From: Waseem Ahmad <42496021+waseemahmad31@users.noreply.github.com>
Date: Sun, 5 May 2019 07:00:34 +0530
Subject: [PATCH] Deprecate no-use-before-declare rule for typescript >= 2.9.0
 (#4695)

---
 src/rules/noUseBeforeDeclareRule.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/rules/noUseBeforeDeclareRule.ts b/src/rules/noUseBeforeDeclareRule.ts
index ae3bf5deddd..bc8eb868ae0 100644
--- a/src/rules/noUseBeforeDeclareRule.ts
+++ b/src/rules/noUseBeforeDeclareRule.ts
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 
+import * as semver from "semver";
 import { isBindingElement } from "tsutils";
 import * as ts from "typescript";
 
@@ -42,6 +43,9 @@ export class Rule extends Lint.Rules.TypedRule {
         typescriptOnly: false,
         requiresTypeInfo: true,
         codeExamples,
+        deprecationMessage: semver.gte(ts.version, "2.9.0-dev.0")
+            ? "Since TypeScript 2.9. Please use the built-in compiler checks instead."
+            : undefined,
     };
     /* tslint:enable:object-literal-sort-keys */