[clang] [TableGen] Use range-based for loops (NFC) (PR #144250)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/144250

None

>From 570adaad1a2be7adea2c2d303505b7d7b9b67d94 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 15 Jun 2025 00:08:53 -0700
Subject: [PATCH] [TableGen] Use range-based for loops (NFC)

---
 .../utils/TableGen/ClangCommentCommandInfoEmitter.cpp | 11 +++++------
 ...ClangCommentHTMLNamedCharacterReferenceEmitter.cpp |  4 ++--
 clang/utils/TableGen/ClangDiagnosticsEmitter.cpp      |  4 ++--
 clang/utils/TableGen/ClangOpcodesEmitter.cpp          |  3 +--
 4 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/clang/utils/TableGen/ClangCommentCommandInfoEmitter.cpp b/clang/utils/TableGen/ClangCommentCommandInfoEmitter.cpp
index f15e30cd3f8f4..161dd425fbc7b 100644
--- a/clang/utils/TableGen/ClangCommentCommandInfoEmitter.cpp
+++ b/clang/utils/TableGen/ClangCommentCommandInfoEmitter.cpp
@@ -78,10 +78,10 @@ void clang::EmitClangCommentCommandInfo(const RecordKeeper &Records,
 
 static std::string MangleName(StringRef Str) {
   std::string Mangled;
-  for (unsigned i = 0, e = Str.size(); i != e; ++i) {
-    switch (Str[i]) {
+  for (char C : Str) {
+    switch (C) {
     default:
-      Mangled += Str[i];
+      Mangled += C;
       break;
     case '(':
       Mangled += "lparen";
@@ -122,9 +122,8 @@ void clang::EmitClangCommentCommandList(const RecordKeeper &Records,
      << "#endif\n";
 
   ArrayRef<const Record *> Tags = Records.getAllDerivedDefinitions("Command");
-  for (size_t i = 0, e = Tags.size(); i != e; ++i) {
-    const Record &Tag = *Tags[i];
-    std::string MangledName = MangleName(Tag.getValueAsString("Name"));
+  for (const Record *Tag : Tags) {
+    std::string MangledName = MangleName(Tag->getValueAsString("Name"));
 
     OS << "COMMENT_COMMAND(" << MangledName << ")\n";
   }
diff --git a/clang/utils/TableGen/ClangCommentHTMLNamedCharacterReferenceEmitter.cpp b/clang/utils/TableGen/ClangCommentHTMLNamedCharacterReferenceEmitter.cpp
index b8d8ac853a5c0..e5eec5e7ca8d4 100644
--- a/clang/utils/TableGen/ClangCommentHTMLNamedCharacterReferenceEmitter.cpp
+++ b/clang/utils/TableGen/ClangCommentHTMLNamedCharacterReferenceEmitter.cpp
@@ -37,9 +37,9 @@ static bool translateCodePointToUTF8(unsigned CodePoint,
 
   raw_svector_ostream OS(CLiteral);
   OS << "\"";
-  for (size_t i = 0, e = UTF8.size(); i != e; ++i) {
+  for (char C : UTF8) {
     OS << "\\x";
-    OS.write_hex(static_cast<unsigned char>(UTF8[i]));
+    OS.write_hex(static_cast<unsigned char>(C));
   }
   OS << "\"";
 
diff --git a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
index e347b89a85d46..bfc60f485cd32 100644
--- a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
+++ b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
@@ -1794,8 +1794,8 @@ static std::string getDiagCategoryEnum(StringRef name) {
   if (name.empty())
     return "DiagCat_None";
   SmallString<256> enumName = StringRef("DiagCat_");
-  for (StringRef::iterator I = name.begin(), E = name.end(); I != E; ++I)
-    enumName += isalnum(*I) ? *I : '_';
+  for (char C : name)
+    enumName += isalnum(C) ? C : '_';
   return std::string(enumName);
 }
 
diff --git a/clang/utils/TableGen/ClangOpcodesEmitter.cpp b/clang/utils/TableGen/ClangOpcodesEmitter.cpp
index 5d6d90994cf37..9d0773e1aff8f 100644
--- a/clang/utils/TableGen/ClangOpcodesEmitter.cpp
+++ b/clang/utils/TableGen/ClangOpcodesEmitter.cpp
@@ -224,8 +224,7 @@ void ClangOpcodesEmitter::EmitProto(raw_ostream &OS, StringRef N,
   auto Args = R->getValueAsListOfDefs("Args");
   Enumerate(R, N, [&OS, &Args](ArrayRef<const Record *> TS, const Twine &ID) {
     OS << "bool emit" << ID << "(";
-    for (size_t I = 0, N = Args.size(); I < N; ++I) {
-      const auto *Arg = Args[I];
+    for (const Record *Arg : Args) {
       bool AsRef = Arg->getValueAsBit("AsRef");
       auto Name = Arg->getValueAsString("Name");