[llvm-dev] Upcoming removal of std::auto_ptr (in C++1z)

[Marshall Clow via llvm-dev]

The upcoming C++1z (probably C++17) standard will not contain several
things - most notably auto_ptr.

Soon, libc++ will not be providing auto_ptr by default when building in
C++1z mode.
You'll be able to get it back with a
"-D_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR" on your command line, or "#define
_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR" before including any libc++ header
files.

Grepping through the LLVM code base, I found several references to auto_ptr
that should be investigated.  Most, if not all of them are in test cases.

# Tests that reference auto_ptr
llvm/test/CodeGen/X86/negate-add-zero.ll
llvm/test/Transforms/DeadStoreElimination/2011-09-06-EndOfFunction.ll
llvm/test/Transforms/MemCpyOpt/loadstore-sret.ll

# Things that define their own auto_ptr
llvm/tools/clang/test/Analysis/diagnostics/Inputs/include/report-issues-within-main-file.h
llvm/tools/clang/test/Analysis/diagnostics/report-issues-within-main-file.cpp
llvm/tools/clang/test/CodeGenCXX/2010-07-23-DeclLoc.cpp

# clang-tidy bits that reference auto_ptr
llvm/tools/clang/tools/extra/clang-tidy/modernize/ReplaceAutoPtrCheck.cpp
llvm/tools/clang/tools/extra/clang-tidy/modernize/ReplaceAutoPtrCheck.h
llvm/tools/clang/tools/extra/docs/clang-tidy/checks/modernize-use-emplace.rst
llvm/tools/clang/tools/extra/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
llvm/tools/clang/tools/extra/test/clang-tidy/Inputs/modernize-replace-auto-ptr/memory.h
llvm/tools/clang/tools/extra/test/clang-tidy/modernize-replace-auto-ptr.cpp
llvm/tools/clang/www/analyzer/potential_checkers.html


The first three files should be investigated.
I believe that the second group should not be affected by this change.
The third group (the clang-tidy changes) probably will not be affected.

-- Marshall
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