From c7093cb3e4a02dd3e8510eb3a4d9911737134b2c Mon Sep 17 00:00:00 2001
From: Lucas Duailibe <lucasds@gmail.com>
Date: Sat, 13 Oct 2018 20:03:51 -0300
Subject: [PATCH] Add ASI protection for TSNonNullExpression (#5262)

---
 src/language-js/printer-estree.js             |  3 ++-
 .../__snapshots__/jsfmt.spec.js.snap          | 22 +++++++++++++++++++
 tests/no-semi-typescript/non-null.ts          |  3 +++
 3 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 tests/no-semi-typescript/non-null.ts

diff --git a/src/language-js/printer-estree.js b/src/language-js/printer-estree.js
index 5d56bda8..068df10e 100644
--- a/src/language-js/printer-estree.js
+++ b/src/language-js/printer-estree.js
@@ -5461,7 +5461,8 @@ function hasNakedLeftSide(node) {
     node.type === "SequenceExpression" ||
     node.type === "TaggedTemplateExpression" ||
     node.type === "BindExpression" ||
-    (node.type === "UpdateExpression" && !node.prefix)
+    (node.type === "UpdateExpression" && !node.prefix) ||
+    node.type === "TSNonNullExpression"
   );
 }
 
diff --git a/tests/no-semi-typescript/__snapshots__/jsfmt.spec.js.snap b/tests/no-semi-typescript/__snapshots__/jsfmt.spec.js.snap
index b75f2ba1..73324dfb 100644
--- a/tests/no-semi-typescript/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/no-semi-typescript/__snapshots__/jsfmt.spec.js.snap
@@ -49,3 +49,25 @@ class A {
 }
 
 `;
+
+exports[`non-null.ts - typescript-verify 1`] = `
+// the 2nd line needs ASI protection
+const el = ReactDOM.findDOMNode(ref)
+;(el as HTMLElement)!.style.cursor = 'pointer'
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// the 2nd line needs ASI protection
+const el = ReactDOM.findDOMNode(ref);
+(el as HTMLElement)!.style.cursor = "pointer";
+
+`;
+
+exports[`non-null.ts - typescript-verify 2`] = `
+// the 2nd line needs ASI protection
+const el = ReactDOM.findDOMNode(ref)
+;(el as HTMLElement)!.style.cursor = 'pointer'
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// the 2nd line needs ASI protection
+const el = ReactDOM.findDOMNode(ref)
+;(el as HTMLElement)!.style.cursor = "pointer"
+
+`;
diff --git a/tests/no-semi-typescript/non-null.ts b/tests/no-semi-typescript/non-null.ts
new file mode 100644
index 00000000..df503c0d
--- /dev/null
+++ b/tests/no-semi-typescript/non-null.ts
@@ -0,0 +1,3 @@
+// the 2nd line needs ASI protection
+const el = ReactDOM.findDOMNode(ref)
+;(el as HTMLElement)!.style.cursor = 'pointer'