Supported new features from the 1999 standard, Type sizes, C++ style comments – Zilog ZUSBOPTS User Manual
Page 197: Trailing comma in enum, Empty macro arguments, Long long int type
UM017105-0511
Type Sizes
Zilog Developer Studio II – ZNEO™
User Manual
169
Supported New Features from the 1999 Standard
The ZNEO compiler implements four new features introduced in the ANSI 1999 standard,
also known as ISO/IEC 9899:1999; each is described below.
C++ Style Comments
Comments preceded by
//
and terminated by the end of a line, as in C++, are supported.
Trailing Comma in Enum
A trailing comma in
enum
declarations is allowed. This essentially allows a common syn-
tactic error that does no harm. Thus, a declaration such as:
enum color {red, green, blue,} col;
is allowed (note the extra comma after
blue
).
Empty Macro Arguments
Preprocessor macros that take arguments are allowed to be invoked with one or more
arguments empty, as in this example:
#define cat3(a,b,c) a b c
printf("%s\n", cat3("Hello ", ,"World"));
// ^ Empty arg
Long Long Int Type
The
long long int
type is allowed. (In the ZNEO C-Compiler, this type is treated as
the same as
long
, which is allowed by the standard.)
Type Sizes
The type sizes for basic data types on the ZNEO C-Compiler are:
The type sizes for the pointer data types on the ZNEO C-Compiler are:
int
32 bits
short int
16 bits
char
8 bits
long
32 bits
float
32 bits
double
32 bits