From e2fe7ef7ea0458de56bed4e4c3d5f71aaebd3f28 Mon Sep 17 00:00:00 2001
From: Yosuke Ota <otameshiyo23@gmail.com>
Date: Sun, 21 Nov 2021 14:22:31 +0900
Subject: [PATCH] feat: support for private-in syntax (fixes #14811) (#15060)

---
 lib/rules/utils/ast-utils.js       |  4 ++++
 tests/lib/rules/space-unary-ops.js | 18 ++++++++++++++++++
 tests/lib/rules/utils/ast-utils.js |  5 ++++-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/lib/rules/utils/ast-utils.js b/lib/rules/utils/ast-utils.js
index 17ab533b366..16d7b811571 100644
--- a/lib/rules/utils/ast-utils.js
+++ b/lib/rules/utils/ast-utils.js
@@ -1833,6 +1833,10 @@ module.exports = {
             return true;
         }
 
+        if (rightToken.type === "PrivateIdentifier") {
+            return true;
+        }
+
         return false;
     },
 
diff --git a/tests/lib/rules/space-unary-ops.js b/tests/lib/rules/space-unary-ops.js
index c56e0135d5e..ccee19c663d 100644
--- a/tests/lib/rules/space-unary-ops.js
+++ b/tests/lib/rules/space-unary-ops.js
@@ -250,6 +250,11 @@ ruleTester.run("space-unary-ops", rule, {
             code: "function *foo () { yield(0) }",
             options: [{ words: false, overrides: { yield: false } }],
             parserOptions: { ecmaVersion: 6 }
+        },
+        {
+            code: "class C { #x; *foo(bar) { yield#x in bar; } }",
+            options: [{ words: false }],
+            parserOptions: { ecmaVersion: 2022 }
         }
     ],
 
@@ -805,6 +810,19 @@ ruleTester.run("space-unary-ops", rule, {
                 line: 1,
                 column: 24
             }]
+        },
+        {
+            code: "class C { #x; *foo(bar) { yield #x in bar; } }",
+            output: "class C { #x; *foo(bar) { yield#x in bar; } }",
+            options: [{ words: false }],
+            parserOptions: { ecmaVersion: 2022 },
+            errors: [{
+                messageId: "unexpectedAfterWord",
+                data: { word: "yield" },
+                type: "YieldExpression",
+                line: 1,
+                column: 27
+            }]
         }
     ]
 });
diff --git a/tests/lib/rules/utils/ast-utils.js b/tests/lib/rules/utils/ast-utils.js
index 0d2954f5b6c..7789de7742c 100644
--- a/tests/lib/rules/utils/ast-utils.js
+++ b/tests/lib/rules/utils/ast-utils.js
@@ -1495,7 +1495,10 @@ describe("ast-utils", () => {
             [["(", "123invalidtoken"], false],
             [["(", "1n"], true],
             [["1n", "+"], true],
-            [["1n", "in"], false]
+            [["1n", "in"], false],
+            [["return", "#x"], true],
+            [["yield", "#x"], true],
+            [["get", "#x"], true]
         ]);
 
         CASES.forEach((expectedResult, tokenStrings) => {