[PATCH] D39922: Create a TempFile class

[Rafael Ávila de Espíndola via Phabricator via llvm-commits]

rafael created this revision.

This just adds a TempFile class and replaces the use in FileOutputBuffer with it.

The only difference for now is better error handling. My idea is to once this is in:

- Convert other user of temporary files to it.
- Add support for automatically deleting on windows.
- Add a createUnnamed method that returns a potentially unnamed file. It would be actually unnamed on modern linux and have a unknown name on windows.


https://reviews.llvm.org/D39922

Files:
  include/llvm/Support/FileSystem.h
  lib/Support/FileOutputBuffer.cpp
  lib/Support/Path.cpp

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