[clang][syntax] Replace `std::vector<bool>` use

LLVM Programmer’s Manual strongly discourages the use of `std::vector<bool>` and suggests `llvm::BitVector` as a possible replacement.

This patch replaces `std::vector<bool>` with `llvm::BitVector` in the Syntax library and replaces range-based for loop with regular for loop. This is necessary due to `llvm::BitVector` not having `begin()` and `end()` (D117116).

Reviewed By: dexonsmith, dblaikie

Differential Revision: https://reviews.llvm.org/D118109

diff --git a/clang/lib/Tooling/Syntax/Tree.cpp b/clang/lib/Tooling/Syntax/Tree.cpp
index c813865..981bac5 100644 (file)
--- a/clang/lib/Tooling/Syntax/Tree.cpp
+++ b/clang/lib/Tooling/Syntax/Tree.cpp
@@ -9,6 +9,7 @@
 #include "clang/Basic/TokenKinds.h"
 #include "clang/Tooling/Syntax/Nodes.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Casting.h"
 #include <cassert>
@@ -202,7 +203,7 @@ static void dumpLeaf(raw_ostream &OS, const syntax::Leaf *L,
 }
 
 static void dumpNode(raw_ostream &OS, const syntax::Node *N,
-                     const SourceManager &SM, std::vector<bool> IndentMask) {
+                     const SourceManager &SM, llvm::BitVector IndentMask) {
   auto DumpExtraInfo = [&OS](const syntax::Node *N) {
     if (N->getRole() != syntax::NodeRole::Unknown)
       OS << " " << N->getRole();
@@ -228,8 +229,8 @@ static void dumpNode(raw_ostream &OS, const syntax::Node *N,
   OS << "\n";
 
   for (const syntax::Node &It : T->getChildren()) {
-    for (bool Filled : IndentMask) {
-      if (Filled)
+    for (unsigned Idx = 0; Idx < IndentMask.size(); ++Idx) {
+      if (IndentMask[Idx])
         OS << "| ";
       else
         OS << "  ";