IDL42 — IDL should have aliases/typedefs for integer that disambiguate representation size

IDL uses the keywords short, long, and long long to designate integer types of sizes 16, 32, and 64 bits, respectively.

In IDL the size of these integer types is well specified. However these names confuse users familiar with languages such as C and C++ where the size of these integers is platform specific. As a result many users end-up defining their own typedefs for different size integers (e.g. INT16, or Int16) resulting in IDLs that are non-uniform do not leverage the built-in types.

To avoid this, IDL should follow the approach taken in C/C++ and introduce typedefs whose name unambiguously indicates the size of the representation.

Proposed "builtin typedefs" would be:

typedef               short              int16; 
typedef               unsigned short     uint16;
typedef               long               int32;
typedef               unsigned long      uint32;
typedef               long long          int64;
typedef               unsigned long long uint64;

Add new keywords for the integer types

Add new keywords for int16, int32, int64, uint16, uint32, and uint64. This should go in the "Building Block Extended Data Types" so that it does not impact existing applications.