fun/examples/defer.fn at main · omdxp/fun · GitHub

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imp std.c.io;

fun logLine(str msg) {
  printf("%s\n", msg);
}

fun main() num {
  logLine("enter main");

  defer logLine("first defer (runs last)");
  defer logLine("second defer (runs first)");

  num x = 42;
  if x == 42 {
    defer logLine("defer inside if");
  }

  defer {
    logLine("defer block line 1");
    logLine("defer block line 2");
  }

  logLine("about to return");
  demoDeferBlockA();
  demoDeferBlockB();
  ret 0;
}

fun demoDeferBlockA() {
  logLine("demo A start");
  defer {
    logLine("demo A defer block");
  }
  logLine("demo A end");
}

fun demoDeferBlockB() {
  logLine("demo B start");
  defer {
    logLine("demo B defer block 1");
    logLine("demo B defer block 2");
  }
  logLine("demo B end");
}