program volatile_doctest use stringifor_string_t type(string) :: astring type(string) :: anotherstring character(len=:), allocatable :: acharacter integer :: istart integer :: iend logical :: test_passed(5) astring = '<test> <first> hello </first> <first> not the first </first> </test>' anotherstring = astring%search(tag_start='<first>', tag_end='</first>') test_passed(1) = anotherstring//''=='<first> hello </first>' astring = '<test> <a> <a> <a> the nested a </a> </a> </a> </test>' anotherstring = astring%search(tag_start='<a>', tag_end='</a>') test_passed(2) = anotherstring//''=='<a> <a> <a> the nested a </a> </a> </a>' call astring%free anotherstring = '<test> <a> <a> <a> the nested a </a> </a> </a> </test>' astring = astring%search(in_string=anotherstring, tag_start='<a>', tag_end='</a>') test_passed(3) = astring//''=='<a> <a> <a> the nested a </a> </a> </a>' call astring%free acharacter = '<test> <a> <a> <a> the nested a </a> </a> </a> </test>' astring = astring%search(in_character=acharacter, tag_start='<a>', tag_end='</a>') test_passed(4) = astring//''=='<a> <a> <a> the nested a </a> </a> </a>' acharacter = '<test> <first> hello </first> <sec> <sec>not the first</sec> </sec> </test>' astring = astring%search(in_character=acharacter, tag_start='<sec>', tag_end='</sec>', istart=istart, iend=iend) test_passed(5) = astring//''==acharacter(31:67) print '(L1)', all(test_passed) endprogram volatile_doctest