[COFF] Use std::optional in Driver.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sun, 27 Nov 2022 04:53:26 +0000 (20:53 -0800)
committerKazu Hirata <kazu@google.com>
Sun, 27 Nov 2022 04:53:26 +0000 (20:53 -0800)
commitfd8d0b03c9ee2b65d49badd4644ac58e8c80d8be
tree7324f7204f673d11c0f035ad50d8c6e468102466
parentf63a19baf0a3ffa62cfb48cc42f9ced1cbd39b5c
[COFF] Use std::optional in Driver.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
lld/COFF/Driver.cpp