From 034d77ef6f0cb40a6d87b733fbcf5f802a878623 Mon Sep 17 00:00:00 2001
From: Andrew Branch <andrew@wheream.io>
Date: Wed, 27 May 2020 17:22:57 -0700
Subject: [PATCH] Update tuple rule for new AST

---
 .vscode/launch.json                       | 20 --------------------
 src/rules/noSingleElementTupleTypeRule.ts |  2 +-
 2 files changed, 1 insertion(+), 21 deletions(-)
 delete mode 100644 .vscode/launch.json

diff --git a/.vscode/launch.json b/.vscode/launch.json
deleted file mode 100644
index ca79fc9..0000000
--- a/.vscode/launch.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "type": "node",
-            "request": "attach",
-            "name": "Attach",
-            "port": 9229,
-            "sourceMaps": true
-        },
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Launch Program",
-            "program": "${workspaceRoot}/test/test.js",
-            "outFiles": ["${workspaceRoot}/bin"]
-        }
-    ]
-}
\ No newline at end of file
diff --git a/src/rules/noSingleElementTupleTypeRule.ts b/src/rules/noSingleElementTupleTypeRule.ts
index f627c8d..4c591e3 100644
--- a/src/rules/noSingleElementTupleTypeRule.ts
+++ b/src/rules/noSingleElementTupleTypeRule.ts
@@ -21,7 +21,7 @@ export class Rule extends Lint.Rules.AbstractRule {
 function walk(ctx: Lint.WalkContext<void>): void {
     const { sourceFile } = ctx;
     sourceFile.forEachChild(function cb(node) {
-        if (ts.isTupleTypeNode(node) && node.elementTypes.length === 1) {
+        if (ts.isTupleTypeNode(node) && (node.elements ?? (node as any).elementTypes).length === 1) {
             ctx.addFailureAtNode(node, failure(
                 Rule.metadata.ruleName,
                 "Type [T] is a single-element tuple type. You probably meant T[]."));