source: doc/theses/andrew_beach_MMath/code/cond-match-r.cfa@ b7d94ac5

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

EHM_EXCEPTION(empty_exception)();

EHM_VIRTUAL_TABLE(empty_exception, empty_vt);

bool should_catch = false;

void throw_exception() {
        throw (empty_exception){&empty_vt};
}

void cond_catch() {
        try {
                throw_exception();
        } catch (empty_exception * exc ; should_catch) {
                // ...
        }
}

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

        Time start_time = time();
        for (unsigned int count = 0 ; count < times ; ++count) {
                try {
                        cond_catch();
                } catch (empty_exception * exc) {
                        // ...
                }
        }
        Time end_time = time();
        sout | "Run-Time (ns): " | (end_time - start_time)`ns;
}