source: doc/theses/andrew_beach_MMath/code/cond-catch.cfa@ 6c121eed

// Conditional Match (or Re-Raise)
#include <clock.hfa>
#include <exception.hfa>
#include <fstream.hfa>
#include <stdlib.hfa>                                                                   // strto

exception empty_exception;
vtable(empty_exception) empty_vt;

bool should_catch = false;

int main(int argc, char * argv[]) {
        unsigned int times = 1;
        if (1 < argc) {
                times = strto(argv[1], 0p, 10);
        }
        if (2 < argc) {
                should_catch = (unsigned int)strto(argv[2], 0p, 2);
        }

        Time start_time = timeHiRes();
        for (unsigned int count = 0 ; count < times ; ++count) {
                try {
                        throw (empty_exception){&empty_vt};
                } catch (empty_exception * exc ; should_catch) {
                        asm volatile ("# catch block (conditional)");
                } catch (empty_exception * exc) {
                        asm volatile ("# catch block (unconditional)");
                }
        }
        Time end_time = timeHiRes();
        sout | "Run-Time (s): " | wd(0,1, (end_time - start_time)`ns / 1_000_000_000.);
}