[PATCH] D42234: [ADT] Add PropagateConst from LFTS2

[Jonathan B Coe via Phabricator via llvm-commits]

jbcoe created this revision.
jbcoe added reviewers: mclow.lists, aaron.ballman.
Herald added subscribers: llvm-commits, mgorny.

PropagateConst wraps a pointer-type and allows only const access to the pointee when the pointer is accessed through a const-access path. PropagateConst is useful when writing const-correct component-based classes.

PropagateConst is part of Library Fundamentals Technical Specification 2 and has been implemented in libcxx and libstdcxx. The implementation in this patch is based on my implementation from libcxx.


Repository:
  rL LLVM

https://reviews.llvm.org/D42234

Files:
  llvm/include/llvm/ADT/PropagateConst.h
  llvm/unittests/ADT/CMakeLists.txt
  llvm/unittests/ADT/PropagateConstTest.cpp

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