gcc/testsuite/gfortran.dg/recursive_statement_functions.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-std=legacy" }
   3 !
   4 ! PR20866 - A statement function cannot be recursive.
   5 ! Contributed by Joost VandeVondele <jv244@cam.ac.uk>
   6 !
   7 ! Modified 20051110 to check that regressions PR24655 and PR24755
   8 ! are fixed. Thanks to pavarini@pv.infn.it and tdeutsch@cea.fr for
   9 ! the tests.
  10 !
  11   INTEGER :: i, st1, st2, st3, lambda, n
  12   REAL :: x, z(2,2)
  13   character(8) :: ch
  14   real(8)   :: fi, arg, sigma, dshpfunc
  15   real(8), parameter :: one=1d0
  16 !
  17 ! Test check for recursion via other statement functions, string
  18 ! length references, function actual arguments and array index
  19 ! references.
  20 !
  21   st1 (i) = len (ch(st2 (1):8))
  22   st2 (i) = max (st3 (1), 4)
  23   st3 (i) = 2 + cos (z(st1 (1), i)) ! { dg-error "is recursive" }
  24 !
  25 ! Test the two regressions.
  26 !
  27   fi (n) = n *one
  28   dshpfunc (arg)=-lambda/sigma*(arg/sigma)**(lambda-1)*exp(-(arg/sigma)**lambda)
  29 !
  30 ! References to each statement function.
  31 !
  32   write(6,*) st1 (1), fi (2), dshpfunc (1.0_8)
  33   END