From 7f6d7391cfff6a444e5e15d1de9be429ff1d9edd Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Fri, 27 Jun 2025 22:07:34 -0700
Subject: [Basic] Use StringRef::drop_back (NFC) (#146195)

---
 clang/lib/Basic/FileManager.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'clang/lib/Basic/FileManager.cpp')

diff --git a/clang/lib/Basic/FileManager.cpp b/clang/lib/Basic/FileManager.cpp
index 3bd7e0c..fc4ec78 100644
--- a/clang/lib/Basic/FileManager.cpp
+++ b/clang/lib/Basic/FileManager.cpp
@@ -141,7 +141,7 @@ FileManager::getDirectoryRef(StringRef DirName, bool CacheFailure) {
   if (DirName.size() > 1 &&
       DirName != llvm::sys::path::root_path(DirName) &&
       llvm::sys::path::is_separator(DirName.back()))
-    DirName = DirName.substr(0, DirName.size()-1);
+    DirName = DirName.drop_back();
   std::optional<std::string> DirNameStr;
   if (is_style_windows(llvm::sys::path::Style::native)) {
     // Fixing a problem with "clang C:test.c" on Windows.
-- 
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