1This directory contains partial re-implementations of some C++ standard library 2utilities. They are for use with internal LLVM libc code and tests. 3 4More utilities can be added on an as needed basis. There are certain rules to 5be followed for future changes and additions: 6 71. Only two kind of headers can be included: Other headers from this directory, 8and free standing C headers. 92. Free standing C headers are to be included as C headers and not as C++ 10headers. That is, use `#include <stddef.h>` and not `#include <cstddef>`. 113. The utilities should be defined in the namespace `LIBC_NAMESPACE::cpp`. The 12higher level namespace should have a `__` prefix to avoid symbol name pollution 13when the utilities are used in implementation of public functions. 14