Jason Rhinelander 793726014d Detect std::pair non-copyability ... Pre-C++17, std::pair can technically have an copy constructor even though it can't actually be invoked without a compilation failure (due to the underlying types being non-copyable). Most stls, including libc++ since ~3.4, use the C++17 behaviour of not exposing an uncallable copy constructor, but FreeBSD deliberately broke their libc++ to preserve the nonsensical behaviour (https://svnweb.freebsd.org/base?view=revision&revision=261801). This updates pybind's internal `is_copy_constructible` to also detect the std::pair case under pre-C++17. This also everything (except for a couple cases in the internal version) to use the internal `is_copy_constructible` rather than `std::is_copy_constructible`.		2017-07-28 20:37:45 -04:00
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pybind11	Detect std::pair non-copyability	2017-07-28 20:37:45 -04:00