[PATCH] D74383: Use C++14-style return type deduction in LLVM.

[Justin Lebar via Phabricator via llvm-commits]

jlebar created this revision.
Herald added subscribers: llvm-commits, dexonsmith.
Herald added a project: LLVM.
jlebar added a reviewer: bkramer.

Simplifies the C++11-style "-> decltype(...)" return-type deduction.

Note that you have to be careful about whether the function return type
is `auto` or `decltype(auto)`.  The difference is that bare `auto`
strips const and reference, just like lambda return type deduction.  In
some cases that's what we want (or more likely, we know that the return
type is a value type), but whenever we're wrapping a templated function
which might return a reference, we need to be sure that the return type
is decltype(auto).

No functional change.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D74383

Files:
  llvm/include/llvm/ADT/STLExtras.h
  llvm/include/llvm/ADT/fallible_iterator.h
  llvm/include/llvm/DebugInfo/PDB/PDBSymbol.h
  llvm/include/llvm/ExecutionEngine/Orc/Core.h
  llvm/include/llvm/ExecutionEngine/Orc/ThreadSafeModule.h
  llvm/include/llvm/Support/Casting.h
  llvm/include/llvm/Support/Errno.h
  llvm/tools/llvm-exegesis/lib/SnippetGenerator.cpp
  llvm/unittests/ADT/STLExtrasTest.cpp
  llvm/unittests/Support/FormatVariadicTest.cpp
  llvm/utils/unittest/googletest/include/gtest/internal/custom/raw-ostream.h

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