gcc/testsuite/gfortran.fortran-torture/execute/st_function.f90

   1 ! Program to test STATEMENT function
   2 program st_fuction
   3    call simple_case
   4    call with_function_call
   5    call with_character_dummy
   6    call with_derived_type_dummy
   7    call with_pointer_dummy
   8    call multiple_eval
   9
  10 contains
  11    subroutine simple_case
  12       integer st1, st2
  13       integer c(10, 10)
  14       st1 (i, j) = i + j
  15       st2 (i, j) = c(i, j)
  16
  17       if (st1 (1, 2) .ne. 3) call abort
  18       c = 3
  19       if (st2 (1, 2) .ne. 3 .or. st2 (2, 3) .ne. 3) call abort
  20    end subroutine
  21
  22    subroutine with_function_call
  23       integer fun, st3
  24       st3 (i, j) = fun (i) + fun (j)
  25
  26       if (st3 (fun (2), 4) .ne. 16) call abort
  27    end subroutine
  28
  29    subroutine with_character_dummy
  30       character (len=4) s1, s2, st4
  31       character (len=10) st5, s0
  32       st4 (i, j) = "0123456789"(i:j)
  33       st5 (s1, s2) = s1 // s2
  34
  35       if (st4 (1, 4) .ne. "0123" ) call abort
  36       if (st5 ("01", "02") .ne. "01  02    ") call abort ! { dg-warning "Character length of actual argument shorter" }
  37    end subroutine
  38
  39    subroutine with_derived_type_dummy
  40       type person
  41          integer age
  42          character (len=50) name
  43       end type person
  44       type (person) me, p, tom
  45       type (person) st6
  46       st6 (p) = p
  47
  48       me%age = 5
  49       me%name = "Tom"
  50       tom = st6 (me)
  51       if (tom%age .ne. 5) call abort
  52       if (tom%name .gt. "Tom") call abort
  53    end subroutine
  54
  55    subroutine with_pointer_dummy
  56       character(len=4), pointer:: p, p1
  57       character(len=4), target:: i
  58       character(len=6) a
  59       a (p) = p // '10'
  60
  61       p1 => i
  62       i = '1234'
  63       if (a (p1) .ne. '123410') call abort
  64    end subroutine
  65
  66    subroutine multiple_eval
  67       integer st7, fun2, fun
  68
  69       st7(i) = i + fun(i)
  70
  71       if (st7(fun2(10)) .ne. 3) call abort
  72    end subroutine
  73 end
  74
  75 ! This functon returns the argument passed on the previous call.
  76 integer function fun2 (i)
  77   integer i
  78   integer, save :: val = 1
  79
  80   fun2 = val
  81   val = i
  82 end function
  83
  84 integer function fun (i)
  85    integer i
  86    fun = i * 2
  87 end function