enum FOO
  FOO_A,
  FOO_B,
  FOO_C
endenum

function bar( a := FOO_B )
  print( "a=" + a );
endfunction

bar( 1 );
bar( 2 );
bar();
bar( FOO_C );
/**** Expected Output Begins: *****
1
2
1
2
*****  Expected Output Ends   ****/