program volatile_doctest use stringifor_string_t type(string) :: astring logical :: test_passed(5) astring = 'Hello WorLD!' test_passed(1) = astring%end_with(suffix='LD!').eqv..true. test_passed(2) = astring%end_with(suffix='lD!').eqv..false. test_passed(3) = astring%end_with(suffix='orLD!', start=5).eqv..true. test_passed(4) = astring%end_with(suffix='orLD!', start=8, end=12).eqv..true. test_passed(5) = astring%end_with(suffix='!').eqv..true. print '(L1)', all(test_passed) endprogram volatile_doctest