From e3b557809604d036af6e00c60f012c2025b59a5e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sat, 11 Feb 2023 13:38:04 +0100
Subject: Vendor import of llvm-project main
 llvmorg-16-init-18548-gb0daacf58f41, the last commit before the upstream
 release/17.x branch was created.

---
 clang/lib/AST/ParentMapContext.cpp | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

(limited to 'clang/lib/AST/ParentMapContext.cpp')

diff --git a/clang/lib/AST/ParentMapContext.cpp b/clang/lib/AST/ParentMapContext.cpp
index e0d4700e4b10..21cfd5b1de6e 100644
--- a/clang/lib/AST/ParentMapContext.cpp
+++ b/clang/lib/AST/ParentMapContext.cpp
@@ -99,7 +99,7 @@ class ParentMapContext::ParentMap {
       return llvm::ArrayRef<DynTypedNode>();
     }
     if (const auto *V = I->second.template dyn_cast<ParentVector *>()) {
-      return llvm::makeArrayRef(*V);
+      return llvm::ArrayRef(*V);
     }
     return getSingleDynTypedNodeFromParentMap(I->second);
   }
@@ -252,7 +252,7 @@ public:
       const auto *S = It->second.dyn_cast<const Stmt *>();
       if (!S) {
         if (auto *Vec = It->second.dyn_cast<ParentVector *>())
-          return llvm::makeArrayRef(*Vec);
+          return llvm::ArrayRef(*Vec);
         return getSingleDynTypedNodeFromParentMap(It->second);
       }
       const auto *P = dyn_cast<Expr>(S);
@@ -265,16 +265,6 @@ public:
   }
 };
 
-template <typename Tuple, std::size_t... Is>
-auto tuple_pop_front_impl(const Tuple &tuple, std::index_sequence<Is...>) {
-  return std::make_tuple(std::get<1 + Is>(tuple)...);
-}
-
-template <typename Tuple> auto tuple_pop_front(const Tuple &tuple) {
-  return tuple_pop_front_impl(
-      tuple, std::make_index_sequence<std::tuple_size<Tuple>::value - 1>());
-}
-
 template <typename T, typename... U> struct MatchParents {
   static std::tuple<bool, DynTypedNodeList, const T *, const U *...>
   match(const DynTypedNodeList &NodeList,
@@ -285,10 +275,11 @@ template <typename T, typename... U> struct MatchParents {
       if (NextParentList.size() == 1) {
         auto TailTuple = MatchParents<U...>::match(NextParentList, ParentMap);
         if (std::get<bool>(TailTuple)) {
-          return std::tuple_cat(
-              std::make_tuple(true, std::get<DynTypedNodeList>(TailTuple),
-                              TypedNode),
-              tuple_pop_front(tuple_pop_front(TailTuple)));
+          return std::apply(
+              [TypedNode](bool, DynTypedNodeList NodeList, auto... TupleTail) {
+                return std::make_tuple(true, NodeList, TypedNode, TupleTail...);
+              },
+              TailTuple);
         }
       }
     }
-- 
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