XCode 15.0 Feature dropped?

Question

abizeauMaxon OP

Created Jun ’24

Replies 2

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I had code compiling with C++20 using XCode 14.3.

I now updated to XCode 15.4, and that feature is not available anymore...

No member named 'join' in namespace 'std::ranges::views'

Why is join got dropped?

Answered by Steven Behnke - Zynga in 793306022

Define _LIBCPP_ENABLE_EXPERIMENTAL and you should get it. See <__ranges/join_view.h> for the explanation:

// Note: `join_view` is still marked experimental because there is an ABI-breaking change that affects `join_view` in
// the pipeline (https://isocpp.org/files/papers/D2770R0.html).
// TODO: make `join_view` non-experimental once D2770 is implemented.
#if _LIBCPP_STD_VER >= 20 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)

Funnily enough, the URL in the header file appears to be incorrect, but P2770R0 https://isocpp.org/files/papers/P2770R0.html correct.

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Answer 1

Steven Behnke - Zynga OP

Jun ’24

Accepted Answer

Define _LIBCPP_ENABLE_EXPERIMENTAL and you should get it. See <__ranges/join_view.h> for the explanation:

// Note: `join_view` is still marked experimental because there is an ABI-breaking change that affects `join_view` in
// the pipeline (https://isocpp.org/files/papers/D2770R0.html).
// TODO: make `join_view` non-experimental once D2770 is implemented.
#if _LIBCPP_STD_VER >= 20 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)

Funnily enough, the URL in the header file appears to be incorrect, but P2770R0 https://isocpp.org/files/papers/P2770R0.html correct.

1

Answer 2

abizeauMaxon OP

Jul ’24

Thanks, it work as expected, it weird that XCode 14.3 did implemented it directly, and then they revert that back to experimental.

Im using this compile-time only, so I should be safe for the really small usage Im doing from it.

Thanks again!

0