// basic test to ensure contracts work pre-c++2a
// { dg-do run { target c++11 } }
// { dg-additional-options "-fcontracts -fcontract-continuation-mode=on" }

int f(int n)
  [[ pre: n > 0 ]]
  [[ post r: r < 0 ]]
{
  [[ assert: n > 0 ]];
  return -n;
}

int main()
{
  f(-5);
  return 0;
}

// { dg-skip-if "requires hosted libstdc++ for stdc++exp" { ! hostedlib } }
// { dg-output "contract violation in function f at .*\\.C:6: .*(\n|\r\n|\r)" }
// { dg-output "contract violation in function f at .*\\.C:9: .*(\n|\r\n|\r)" }
// { dg-output "contract violation in function f at .*\\.C:7: .*(\n|\r\n|\r)" }