gcc/testsuite/gfortran.dg/deferred_type_param_5.f90

   1 ! { dg-do compile }
   2 !
   3 ! PR fortran/49110
   4 ! PR fortran/52843
   5 !
   6 ! Based on a contributed code by jwmwalrus@gmail.com
   7 !
   8 ! Before, character(len=:) result variable were rejected in PURE functions.
   9 !
  10 module mod1
  11     use iso_c_binding
  12     implicit none
  13
  14 contains
  15     pure function c_strlen(str)
  16       character(KIND = C_CHAR), intent(IN) :: str(*)
  17       integer :: c_strlen,i
  18
  19       i = 1
  20       do
  21         if (i < 1) then
  22           c_strlen = 0
  23           return
  24         end if
  25         if (str(i) == c_null_char) exit
  26         i = i + 1
  27       end do
  28       c_strlen = i - 1
  29     end function c_strlen
  30     pure function c2fstring(cbuffer) result(string)
  31         character(:), allocatable :: string
  32         character(KIND = C_CHAR), intent(IN) :: cbuffer(*)
  33         integer :: i
  34
  35     continue
  36         string = REPEAT(' ', c_strlen(cbuffer))
  37
  38         do i = 1, c_strlen(cbuffer)
  39             if (cbuffer(i) == C_NULL_CHAR) exit
  40             string(i:i) = cbuffer(i)
  41         enddo
  42
  43         string = TRIM(string)
  44     end function
  45 end module mod1
  46
  47 use mod1
  48 character(len=:), allocatable :: str
  49 str = c2fstring("ABCDEF"//c_null_char//"GHI")
  50 if (len(str) /= 6 .or. str /= "ABCDEF") STOP 1
  51 end