HP aC++/HP C A.06.28 Programmer's Guide Integrity servers (769150-001, March 2014)

int i1 = 3, i2 = 3;
printf("Distance from macro : %d\n",
distance1(i1,i2) )
; printf("Distance from inline function : %d\n",
distance2(i1,i2) );
}
Predefined Macros
In addition to __LINE__ and __FILE__, HP aC++ provides the following predefined macros.
The list describes the complete set of predefined macros that produce special information. They
cannot be undefined nor changed.
• __cplusplus produces the decimal constant 199707L, indicating that the implementation
supports ANSI/ISO C++ International Standard features. For example,
#if (__cplusplus >= 199711L)
#include
#else
#include
• __DATE__ produces the date of compilation in the form Mmm dd yyyy.
• __FILE__ produces the name of the file being compiled.
• __HP_aCC identifies the HP aC++ compiler driver version. It is represented as a 6-digit number
in the format mmnnxx, where mm is the major version number, nn is the minor version number,
and xx is any extension. For example, for version A.01.21, __HP_aCC=012100.
• __hpux is defined.
• __ia64 is defined.
• __LINE__ produces the current source line number.
• __LP64__ is defined for +DD64.
• _ILP32 is defined for +DD32.
• _LP64 is defined for +DD64.
• __STDCPP__ produces the decimal constant 1, indicating that the preprocessor is in ANSI
C/C++ mode.
• __TIME__ produces the time of compilation in the form hh:mm:ss.
• __unix is defined.
To use some HP-UX system functions you may need to define the symbol __HPUX_SOURCE.
See stdsyms(5) manpage or the HP-UX Reference Manual for more information.
Assertions (#assert, #unassert)
Use #assert and #unassert to set a predicate name or predicate name and token to be tested
with a #if directive. Note that you must also specify the -ext option at compile and link time.
Syntax
#assertpredicate-name[token-name]
#unassertpredicate-name[token-name]
Description
#assert sets the predicate-name [token-name] to true. #unassert sets the
predicate-name [token-name] to false.
Note that when testing a predicate, it must be preceded by the # character.
Overview of the Preprocessor 125