cpp basic syntax question

bkelly · 04-12-2018, 01:59 PM

Near the top of this cpp file is found:

Code:

BEGIN_APS( “the app name in all caps” );
BEGIN_STATUS();
   INT32 ( GOOD_COUNT, UNITS_NONE,OPTIONAL);
   INT32( BAD_COUNT, UNITS_NONE, OPTIONAL );
// repeat for multiple lines
END_STATUS();

Further down is found:

Code:

GOOD_COUNT ++;

These look like simple declarations, but UNITS_NONE and OPTIONAL are repeated. Structures? But the semicolon at end of BEGIN_STATUS(); surprises me.

Please enlighten me.
Edit: It occurs to me that macros may be in use here. I have never written any? Is that a possibility?

ntubski · 04-12-2018, 05:38 PM

Those are likely macros. Somewhere in that file, or in files it #includes, there is some #define BEGIN_APS(appname) statement. So you have to see what the macro definitions are in order to decide what they're doing.

AnanthaP · 04-12-2018, 07:40 PM

Earlier, it was conventional wisdom that #defines do not end with a semi colon.. This is because the semi colon marks the end of a statement and when the definition is used, that might not be the case.

Looks more like a header.

Further, the name INT32 (as opposed to int32) looks like a custom name.

OK