[llvm] 59ac5b7 - [Support] Use llvm::to_underlying in BinaryStreamWriter.h (NFC) (#163087)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-10-12T20:49:26-07:00
New Revision: 59ac5b7eee30ad7a4860946a5e3d2c8822f9655b

URL: https://github.com/llvm/llvm-project/commit/59ac5b7eee30ad7a4860946a5e3d2c8822f9655b
DIFF: https://github.com/llvm/llvm-project/commit/59ac5b7eee30ad7a4860946a5e3d2c8822f9655b.diff

LOG: [Support] Use llvm::to_underlying in BinaryStreamWriter.h (NFC) (#163087)

llvm::to_underlying, forward ported from C++23, conveniently packages
static_cast and std::underlying_type_t like so:

  static_cast<std::underlying_type_t<EnumTy>>(E)

Added: 
    

Modified: 
    llvm/include/llvm/Support/BinaryStreamWriter.h

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/Support/BinaryStreamWriter.h b/llvm/include/llvm/Support/BinaryStreamWriter.h
index dddf53bd5483c..39ce0b6e4c110 100644
--- a/llvm/include/llvm/Support/BinaryStreamWriter.h
+++ b/llvm/include/llvm/Support/BinaryStreamWriter.h
@@ -10,6 +10,7 @@
 #define LLVM_SUPPORT_BINARYSTREAMWRITER_H
 
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/BinaryStreamArray.h"
 #include "llvm/Support/BinaryStreamError.h"
@@ -69,8 +70,7 @@ class BinaryStreamWriter {
     static_assert(std::is_enum<T>::value,
                   "Cannot call writeEnum with non-Enum type");
 
-    using U = std::underlying_type_t<T>;
-    return writeInteger<U>(static_cast<U>(Num));
+    return writeInteger(llvm::to_underlying(Num));
   }
 
   /// Write the unsigned integer Value to the underlying stream using ULEB128