Annex C (informative) Compatibility [diff]

C.4 C++ and ISO C++ 2014 [diff.cpp14]

C.4.9 Clause [utilities]: general utilities library [diff.cpp14.utilities]

[func.wrap]
Change: Constructors taking allocators removed.

Rationale: No implementation consensus.

Effect on original feature: Valid C++ 2014 code may fail to compile or may change meaning in this International Standard.
Specifically, constructing a std​::​function with an allocator is ill-formed and uses-allocator construction will not pass an allocator to std​::​function constructors in this International Standard.
[util.smartptr.shared]
Change: Different constraint on conversions from unique_­ptr.

Rationale: Adding array support to shared_­ptr, via the syntax shared_­ptr<T[]> and shared_­ptr<T[N]>.

Effect on original feature: Valid C++ 2014code may fail to compile or may change meaning in this International Standard.
For example:
#include <memory>
std::unique_ptr<int[]> arr(new int[1]);
std::shared_ptr<int> ptr(std::move(arr)); // error: int(*)[] is not compatible with int*