Kazu Hirata 6ba4b62af8 Return None instead of Optional<T>() (NFC) ... This patch replaces: return Optional<T>(); with: return None; to make the migration from llvm::Optional to std::optional easier. Specifically, I can deprecate None (in my source tree, that is) to identify all the instances of None that should be replaced with std::nullopt. Note that "return None" far outnumbers "return Optional<T>();". There are more than 2000 instances of "return None" in our source tree. All of the instances in this patch come from functions that return Optional<T> except Archive::findSym and ASTNodeImporter::import, where we return Expected<Optional<T>>. Note that we can construct Expected<Optional<T>> from any parameter convertible to Optional<T>, which None certainly is. 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 Differential Revision: https://reviews.llvm.org/D138464		2022-11-21 19:06:42 -08:00
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CMakeLists.txt	[llvm][lldb] use FindLibEdit.cmake everywhere	2022-05-12 15:59:41 -07:00
LineEditor.cpp	Return None instead of Optional<T>() (NFC)	2022-11-21 19:06:42 -08:00