Jordan Rose 771ac70aed Add an emplace(...) method to llvm::Optional<T>. ... This can be used for in-place initialization of non-moveable types. For compilers that don't support variadic templates, only up to four arguments are supported. We can always add more, of course, but this should be good enough until we move to a later MSVC that has full support for variadic templates. Inspired by std::experimental::optional from the "Library Fundamentals" C++ TS. Reviewed by David Blaikie. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218732 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-01 02:12:35 +00:00
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ADT	Add an emplace(...) method to llvm::Optional<T>.	2014-10-01 02:12:35 +00:00
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