[clang-tools-extra] [clang] Default-construct values with DenseMap::try_emplace (NFC) (PR #141373)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/141373

try_emplace can default-construct values, so we do not need to do so
on our own.


>From c4590156c4dab5a70edca1056bc533a073f615e3 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 24 May 2025 11:24:36 -0700
Subject: [PATCH] [clang] Default-construct values with DenseMap::try_emplace
 (NFC)

try_emplace can default-construct values, so we do not need to do so
on our own.
---
 clang-tools-extra/clangd/index/SymbolCollector.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang-tools-extra/clangd/index/SymbolCollector.cpp b/clang-tools-extra/clangd/index/SymbolCollector.cpp
index 3f5633357073d..6bdb1080fb294 100644
--- a/clang-tools-extra/clangd/index/SymbolCollector.cpp
+++ b/clang-tools-extra/clangd/index/SymbolCollector.cpp
@@ -1201,7 +1201,7 @@ void SymbolCollector::addRef(SymbolID ID, const SymbolRef &SR) {
 }
 
 SymbolID SymbolCollector::getSymbolIDCached(const Decl *D) {
-  auto It = DeclToIDCache.try_emplace(D, SymbolID{});
+  auto It = DeclToIDCache.try_emplace(D);
   if (It.second)
     It.first->second = getSymbolID(D);
   return It.first->second;
@@ -1210,7 +1210,7 @@ SymbolID SymbolCollector::getSymbolIDCached(const Decl *D) {
 SymbolID SymbolCollector::getSymbolIDCached(const llvm::StringRef MacroName,
                                             const MacroInfo *MI,
                                             const SourceManager &SM) {
-  auto It = MacroToIDCache.try_emplace(MI, SymbolID{});
+  auto It = MacroToIDCache.try_emplace(MI);
   if (It.second)
     It.first->second = getSymbolID(MacroName, MI, SM);
   return It.first->second;