From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Tue, 10 Oct 2017 07:21:34 +0000 (+0000)
Subject: [ASTMatchers] Don't create a copy of a std::set when iterating over it.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d89b5f87c94eef6e83389be238f3473f51649c30;p=clang

[ASTMatchers] Don't create a copy of a std::set when iterating over it.

This is a bit awkward because lookup returns a copy instead of a
reference. No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315276 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/ASTMatchers/ASTMatchFinder.cpp b/lib/ASTMatchers/ASTMatchFinder.cpp
index 49b15ee685..02aee4b46d 100644
--- a/lib/ASTMatchers/ASTMatchFinder.cpp
+++ b/lib/ASTMatchers/ASTMatchFinder.cpp
@@ -734,7 +734,10 @@ private:
                             BoundNodesTreeBuilder *Builder) {
     const Type *const CanonicalType =
       ActiveASTContext->getCanonicalType(TypeNode);
-    for (const TypedefNameDecl *Alias : TypeAliases.lookup(CanonicalType)) {
+    auto Aliases = TypeAliases.find(CanonicalType);
+    if (Aliases == TypeAliases.end())
+      return false;
+    for (const TypedefNameDecl *Alias : Aliases->second) {
       BoundNodesTreeBuilder Result(*Builder);
       if (Matcher.matches(*Alias, this, &Result)) {
         *Builder = std::move(Result);