[Support] Use std::optional in FormatVariadic.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 05:25:27 +0000 (21:25 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 05:25:27 +0000 (21:25 -0800)
commit1a20dade4d4f4ccd2383657cb638a27602ff7606
treef49ae5d8a6e6b491de2eb36258b5d51baf8bf58f
parent11b75f952cf18454b6c6f9a399697279c369d1a0
[Support] Use std::optional in FormatVariadic.cpp (NFC)

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
llvm/lib/Support/FormatVariadic.cpp