From bac27b1c17d169fe09715b71fe42736b8112e01d Mon Sep 17 00:00:00 2001
From: ASVLCII <308706627+ASVLCII@users.noreply.github.com>
Date: Mon, 31 Aug 2026 21:06:42 +0700
Subject: [PATCH] Add formatter check for backtick line continuation

Co-authored-by: OpenAI Codex <noreply@openai.com>
---
 .../CheckBacktickLineContinuation.ps1         | 35 +++++++++++++++++++
 .build/Invoke-CodeFormatterOnFiles.ps1        |  2 ++
 2 files changed, 37 insertions(+)
 create mode 100644 .build/CodeFormatterChecks/CheckBacktickLineContinuation.ps1

diff --git a/.build/CodeFormatterChecks/CheckBacktickLineContinuation.ps1 b/.build/CodeFormatterChecks/CheckBacktickLineContinuation.ps1
new file mode 100644
index 0000000000..ef899ce02e
--- /dev/null
+++ b/.build/CodeFormatterChecks/CheckBacktickLineContinuation.ps1
@@ -0,0 +1,35 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+function CheckBacktickLineContinuation {
+    [CmdletBinding()]
+    [OutputType([boolean])]
+    param (
+        [Parameter()]
+        [System.IO.FileInfo]
+        $FileInfo,
+
+        [Parameter()]
+        [boolean]
+        $Save
+    )
+
+    if ($FileInfo.Extension -ne ".ps1" -and $FileInfo.Extension -ne ".psm1") {
+        return $false
+    }
+
+    $content = Get-Content -Path $FileInfo.FullName -Raw
+    $errorsReturned = $null
+    $tokens = [System.Management.Automation.PSParser]::Tokenize($content, [ref]$errorsReturned)
+    if ($errorsReturned.Count -gt 0) {
+        Write-Warning "Failed to tokenize script: $($FileInfo.FullName)."
+        return $true
+    }
+
+    $lineContinuations = @($tokens | Where-Object { $_.Type -eq "LineContinuation" })
+    foreach ($token in $lineContinuations) {
+        Write-Warning "Backtick line continuation at line $($token.StartLine) in file $($FileInfo.FullName)."
+    }
+
+    return $lineContinuations.Count -gt 0
+}
diff --git a/.build/Invoke-CodeFormatterOnFiles.ps1 b/.build/Invoke-CodeFormatterOnFiles.ps1
index ecdfead484..22fa37e8cc 100644
--- a/.build/Invoke-CodeFormatterOnFiles.ps1
+++ b/.build/Invoke-CodeFormatterOnFiles.ps1
@@ -5,6 +5,7 @@
 
 . $PSScriptRoot\Load-Module.ps1
 . $PSScriptRoot\CodeFormatterChecks\CheckContainsCurlyQuotes.ps1
+. $PSScriptRoot\CodeFormatterChecks\CheckBacktickLineContinuation.ps1
 . $PSScriptRoot\CodeFormatterChecks\CheckFileHasNewlineAtEndOfFile.ps1
 . $PSScriptRoot\CodeFormatterChecks\CheckMarkdownFileHasNoBOM.ps1
 . $PSScriptRoot\CodeFormatterChecks\CheckMultipleEmptyLines.ps1
@@ -59,6 +60,7 @@ function Invoke-CodeFormatterOnFiles {
         $errorCount += (CheckTokenTypeCasing $fileInfo $Save "Operator") ? 1 : 0
         $errorCount += (CheckMultipleEmptyLines $fileInfo $Save) ?  1 : 0
         $errorCount += (CheckContainsCurlyQuotes $fileInfo $Save) ? 1 : 0
+        $errorCount += (CheckBacktickLineContinuation $fileInfo $Save) ? 1 : 0
 
         $results = @(CheckScriptFormat $fileInfo $Save)
         if ($results.Length -gt 0 -and $results[0] -eq $true) {