func run_test[x: String] : I64
    printf("Building %s...", x)
    let cmd: String = concat("./target/release/zern examples/", x)

    let build_start_time: I64 = time()
    if system(cmd) != 0
        exit(1)
    let build_end_time: I64 = time()

    free(cmd)
    printf(" %ldms\n", build_end_time - build_start_time)

    let run_start_time: I64 = time()
    if system("./out") != 0
        exit(1)
    let run_end_time: I64 = time()
    
    printf("Running %s... %ldms\n", x, run_end_time - run_start_time)

func main[] : I64
    system("cargo build --release")

    // TODO
    run_test("euler1.zr")
    run_test("euler2.zr")
    run_test("euler3.zr")
    run_test("euler4.zr")
    run_test("euler5.zr")
    run_test("euler6.zr")
    run_test("euler7.zr")
    run_test("euler8.zr")
    run_test("euler9.zr")
    run_test("euler10.zr")
    run_test("euler12.zr")
    run_test("euler13.zr")
    run_test("euler14.zr")
    run_test("euler15.zr")
    run_test("fib.zr")
    run_test("hello.zr")
    run_test("strings.zr")