From d176d6bce9953c1b20eff851208235ea7e7a5efa Mon Sep 17 00:00:00 2001
From: Yosuke Ota <otameshiyo23@gmail.com>
Date: Tue, 5 Jan 2021 10:29:24 +0900
Subject: [PATCH] Fix false positives for assignments in `no-ref-as-operand`
 rule (#1409)

---
 lib/rules/no-ref-as-operand.js       |  5 ++++-
 tests/lib/rules/no-ref-as-operand.js | 10 ++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/rules/no-ref-as-operand.js b/lib/rules/no-ref-as-operand.js
index fb5dc0881..00cdbed09 100644
--- a/lib/rules/no-ref-as-operand.js
+++ b/lib/rules/no-ref-as-operand.js
@@ -131,8 +131,11 @@ module.exports = {
         reportIfRefWrapped(node)
       },
       // refValue+=1, refValue-=1, foo+=refValue, foo-=refValue
-      /** @param {Identifier} node */
+      /** @param {Identifier & {parent: AssignmentExpression}} node */
       'AssignmentExpression>Identifier'(node) {
+        if (node.parent.operator === '=' && node.parent.left !== node) {
+          return
+        }
         reportIfRefWrapped(node)
       },
       // refValue || other, refValue && other. ignore: other || refValue
diff --git a/tests/lib/rules/no-ref-as-operand.js b/tests/lib/rules/no-ref-as-operand.js
index 50cfd3249..2a6293485 100644
--- a/tests/lib/rules/no-ref-as-operand.js
+++ b/tests/lib/rules/no-ref-as-operand.js
@@ -121,6 +121,16 @@ tester.run('no-ref-as-operand', rule, {
     const count = ref
     count++
     `,
+    `
+    import { ref } from 'vue'
+    const count = ref(0)
+    foo = count
+    `,
+    `
+    import { ref } from 'vue'
+    const count = ref(0)
+    const foo = count
+    `,
     {
       code: `
       <script>