cfor 1.1.0

A macro that gives Rust a C-style for loop, with initialisation, condition and step. This correctly handles control-flow like continue and break.
Documentation
int main(int argc, char** argv) {
    int tick = 0;
    for (int a = argc - 1, b = 0; a + b < 20; a++, b++) {
        tick++;
    }
    printf("%d", tick);
}