Fix formatting of index containing brackets string in parentheses

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Fix formatting of index containing brackets string in parentheses ([#992](https://github.com/JohnnyMorganz/StyLua/pull/992))
+
 ## [2.1.0] - 2025-04-21
 
 ### Added

src/formatters/expression.rs

@@ -369,6 +369,7 @@ pub fn is_brackets_string(expression: &Expression) -> bool {
                 ..
             }
         ),
+        Expression::Parentheses { expression, .. } => is_brackets_string(expression),
         #[cfg(feature = "luau")]
         Expression::TypeAssertion { expression, .. } => is_brackets_string(expression),
         _ => false,

tests/inputs-luau/string-brackets-index.lua

@@ -1,5 +1,9 @@
 local foo = {
 	[ [[test]] :: test ] = true,
+	[ ([[foo]]) :: test ] = true,
+	[ ( [[bar]] ) :: test ] = true,
 }
 
 foo[ [[test]] :: test ] = false
+foo[ ([[foo]]) :: test ] = false
+foo[ ( [[bar]] ) :: test ] = false

tests/inputs/string-brackets-index.lua

@@ -1,5 +1,11 @@
 local foo = {
 	[ [[test]] ] = true,
+	[([[foo]])] = true,
+	[( [[bar]] )] = true,
+	[ ([[baz]]) ] = true,
 }
 
 foo[ [[test]] ] = false
+foo[([[foo]])] = true
+foo[( [[bar]] )] = true
+foo[ ([[baz]]) ] = true

tests/snapshots/tests__luau@string-brackets-index.lua.snap

@@ -5,7 +5,11 @@ input_file: tests/inputs-luau/string-brackets-index.lua
 ---
 local foo = {
 	[ [[test]] :: test ] = true,
+	[ ([[foo]]) :: test ] = true,
+	[ ([[bar]]) :: test ] = true,
 }
 
 foo[ [[test]] :: test ] = false
+foo[ ([[foo]]) :: test ] = false
+foo[ ([[bar]]) :: test ] = false
 

tests/snapshots/tests__standard@string-brackets-index.lua.snap

@@ -4,7 +4,13 @@ expression: format(&contents)
 ---
 local foo = {
 	[ [[test]] ] = true,
+	[ [[foo]] ] = true,
+	[ [[bar]] ] = true,
+	[ [[baz]] ] = true,
 }
 
 foo[ [[test]] ] = false
+foo[ [[foo]] ] = true
+foo[ [[bar]] ] = true
+foo[ [[baz]] ] = true