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f5e27edc7b
I tried making these private & friended to the BitVector, but that didn't work - there's one use of BitVector::reference in Clang that actually copies it into a local variable & uses it from there, rather than just using the result of op[] in a temporary expression. Whether or not this is desired is debatable (we could just fix that one use in Clang) & it's not clear which way the C++ standard falls on this for std::bitset's reference type (it has the same bug at least in libstdc++, but Clang's -Wdeprecated doesn't flag it, because it's in a standard header) While it was only BitVector::reference's copy ctor that was referenced by user code, I made SmallBitVector::reference's copy ctor public too, for consistency. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231099 91177308-0d34-0410-b5e6-96231b3b80d8
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