gcc/testsuite/g++.dg/coroutines/torture/lambda-01-co-ret-parm.C

//  { dg-do run }

// Lambda with parm

#include "../coro.h"

// boiler-plate for tests of codegen
#include "../coro1-ret-int-yield-int.h"

int main ()
{
  auto f = [](int x) -> coro1
  {
    if (x > 30)
     {
	PRINT ("coro1: about to return k");
	co_return 6174;
     }
    else if (x > 20)
     {
	PRINT ("coro1: about to return the answer");
	co_return 42;
     }
    else
     {
	PRINT ("coro1: about to return 0");
	co_return 0;
     }
  };

  PRINT ("main: create coro1");
  coro1 x = f (25);
  PRINT ("main: got coro1 - resuming");
  if (x.handle.done())
    abort();
  x.handle.resume();
  PRINT ("main: after resume");
  int y = x.handle.promise().get_value();
  if ( y != 42 )
    abort ();
  if (!x.handle.done())
    {
      PRINT ("main: apparently not done...");
      abort ();
    }
  PRINT ("main: returning");
  return 0;
}