[PATCH] D27464: Use the fallible llvm::Regex constructor in Clang.

[David L. Jones via Phabricator via llvm-commits]

dlj created this revision.
dlj added reviewers: rsmith, llvm-commits.
dlj added a subscriber: klimek.

This change updates Clang to check for an llvm::Expected<llvm::Regex>, instead
of constructing an invalid Regex and checking .isValid().

Since most of the uses already (silently) ignore invalid llvm::Regex objects,
I've not tried too hard to propagate construction-time errors.


https://reviews.llvm.org/D27464

Files:
  include/clang/ASTMatchers/ASTMatchers.h
  lib/Driver/Multilib.cpp
  lib/Format/ContinuationIndenter.cpp
  lib/Format/Format.cpp
  lib/Format/FormatTokenLexer.cpp
  lib/Frontend/CompilerInvocation.cpp
  lib/Frontend/VerifyDiagnosticConsumer.cpp
  tools/driver/driver.cpp

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