[Patch, Fortran] PR51953 - allow multiple alloc obj. with SOURCE= in allocate

[Tobias Burnus]

That's a Fortran 2008 feature.

Build and regtested on x86-64-linux.
OK for the trunk?

Tobias

2012-01-27  Tobias Burnus  <bur...@net-b.de>

	PR fortran/51953
	* match.c (gfc_match_allocate): Allow more than allocate
	object with SOURCE=.

2012-01-27  Tobias Burnus  <bur...@net-b.de>

	PR fortran/51953
	* gfortran.dg/allocate_alloc_opt_13.f90: New.
	* gfortran.dg/allocate_alloc_opt_4.f90: Add -std=f2003
	and change dg-error string.

Index: gcc/fortran/match.c
===================================================================
--- gcc/fortran/match.c	(revision 183575)
+++ gcc/fortran/match.c	(working copy)
@@ -3660,12 +3660,11 @@ alloc_opt_list:
 	      goto cleanup;
 	    }
 
-	  if (head->next)
-	    {
- 	      gfc_error ("SOURCE tag at %L requires only a single entity in "
-			 "the allocation-list", &tmp->where);
-	      goto cleanup;
-            }
+	  if (head->next
+	      && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SOURCE tag at %L"
+				 " with more than a single allocate objects",
+				 &tmp->where) == FAILURE)
+	    goto cleanup;
 
 	  source = tmp;
 	  tmp = NULL;
Index: gcc/testsuite/gfortran.dg/allocate_alloc_opt_13.f90
===================================================================
--- gcc/testsuite/gfortran.dg/allocate_alloc_opt_13.f90	(revision 0)
+++ gcc/testsuite/gfortran.dg/allocate_alloc_opt_13.f90	(working copy)
@@ -0,0 +1,25 @@
+! { dg-do compile }
+!
+! PR fortran/51953
+!
+!
+type t
+end type t
+
+class(t), allocatable :: a, c(:), e(:)
+class(t), pointer :: b, d(:)
+
+allocate (a, b, source=c(1))
+allocate (c(4), d(6), source=e)
+
+allocate (a, b, source=f())
+allocate (c(1), d(6), source=g())
+
+contains
+function f()
+  class(t), allocatable :: f
+end function
+function g()
+  class(t), allocatable :: g(:)
+end function
+end
Index: gcc/testsuite/gfortran.dg/allocate_alloc_opt_4.f90
===================================================================
--- gcc/testsuite/gfortran.dg/allocate_alloc_opt_4.f90	(revision 183575)
+++ gcc/testsuite/gfortran.dg/allocate_alloc_opt_4.f90	(working copy)
@@ -1,4 +1,5 @@
 ! { dg-do compile }
+! { dg-options "-std=f2003" }
 program a
 
   implicit none
@@ -16,7 +17,7 @@ program a
 
   allocate(integer(4) :: i(4), source=n) ! { dg-error "conflicts with the typespec" }
 
-  allocate(i(4), j(n), source=n) ! { dg-error "requires only a single entity" }
+  allocate(i(4), j(n), source=n) ! { dg-error "Fortran 2008: SOURCE tag at .1. with more than a single allocate objects" }
 
   allocate(x(4), source=n) ! { dg-error "type incompatible with" }