[clang-tidy] Ignore implicit casts in modernize-use-default-member-init

Summary:
Initialising a pointer from nullptr involves an implicit cast.
Ignore it after getting initialiser from InitListExpr.

Fixes: PR44440

Reviewers: aaron.ballman, alexfh, JonasToth

Reviewed By: JonasToth

Subscribers: xazax.hun, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D72630

1 files changed, 1 insertions, 1 deletions

diff --git a/clang-tools-extra/clang-tidy/modernize/UseDefaultMemberInitCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseDefaultMemberInitCheck.cpp
index 1e59acb1ff1..e99a90ffba5 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseDefaultMemberInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseDefaultMemberInitCheck.cpp
@@ -137,7 +137,7 @@ static const Expr *ignoreUnaryPlus(const Expr *E) {
 static const Expr *getInitializer(const Expr *E) {
   auto *InitList = dyn_cast<InitListExpr>(E);
   if (InitList && InitList->getNumInits() == 1)
-    return InitList->getInit(0);
+    return InitList->getInit(0)->IgnoreParenImpCasts();
   return E;
 }