[Support] Add Error::errorForOutParameter helper.

This helper method creates a pre-checked Error suitable for use as an out
parameter in a constructor. This avoids the need to have the constructor
check a known-good error before assigning to it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264467 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed