The SwiftStdint.h header is used in the compiler as well. The compiler may be
built with cl (Visual Studio) on Windows, which does not define
`__INTPTR_TYPE__` nor does it define `__INTPTR_WIDTH__`. Simply define the
`__swift_{,u}intptr_t` typedefs as Microsoft does on that platform when building
with Visual Studio.
The standard library has grown significantly, and we need a new
directory structure that clearly reflects the role of the APIs, and
allows future growth.
See stdlib/{public,internal,private}/README.txt for more information.
Swift SVN r25876