[PATCH] D81156: [Support] Create a tied stream class and use it for errs()

[James Henderson via Phabricator via llvm-commits]

jhenderson created this revision.
jhenderson added reviewers: labath, dblaikie, probinson, JDevlieghere, ikudrin, MaskRay.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

errs() is now tied to outs() so that if something prints to errs(), outs() will be flushed before the printing occurs. This avoids interleaving output between the two.

Other clients can use the tied_raw_ostream class to achieve the same effect for other combinations of streams.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D81156

Files:
  llvm/include/llvm/Support/raw_ostream.h
  llvm/lib/Support/raw_ostream.cpp
  llvm/unittests/Support/raw_ostream_test.cpp

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