dblaikie added inline comments.
================
Comment at: llvm/include/llvm/IR/BasicBlock.h:324-325
+ template <typename PHINodeU, typename BBIteratorU,
+ typename = std::enable_if_t<
+ std::is_convertible<PHINodeU *, PHINodeT *>::value>>
phi_iterator_impl(const phi_iterator_impl<PHINodeU, BBIteratorU> &Arg)
----------------
BRevzin wrote:
> dblaikie wrote:
> > What tripped over/required this SFINAE?
> There's somewhere which compared a const iterator to a non-const iterator,
> that ends up doing conversions in both directions under C++20 rules, one
> direction of which is perfectly fine and the other was a hard error. Need to
> make the non-const iterator not constructible from a const iterator.
Is this true for all iterators? Or some quirk of how this one is written/used
(that could be fixed/changed there instead)?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D78938/new/
https://reviews.llvm.org/D78938
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