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(C++) patch for casts to cv-qualified class type


We were failing to propagate the cv-quals to the TARGET_EXPR.  Fixes
g++.other/overcnv2.C.

1999-05-20  Jason Merrill  <jason@yorick.cygnus.com>

	* tree.c (lvalue_p_1): A NOP_EXPR can be an lvalue.
	(build_cplus_new): Make sure that what we return is of the right type.

Index: tree.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/cp/tree.c,v
retrieving revision 1.113
diff -c -p -r1.113 tree.c
*** tree.c	1999/05/20 10:44:42	1.113
--- tree.c	1999/05/20 19:15:01
*************** lvalue_p_1 (ref, treat_class_rvalues_as_
*** 71,76 ****
--- 71,77 ----
      case WITH_CLEANUP_EXPR:
      case REALPART_EXPR:
      case IMAGPART_EXPR:
+     case NOP_EXPR:
        return lvalue_p_1 (TREE_OPERAND (ref, 0),
  			 treat_class_rvalues_as_lvalues);
  
*************** build_cplus_new (type, init)
*** 193,199 ****
    tree rval;
  
    if (TREE_CODE (init) != CALL_EXPR && TREE_CODE (init) != AGGR_INIT_EXPR)
!     return init;
  
    slot = build (VAR_DECL, type);
    DECL_ARTIFICIAL (slot) = 1;
--- 194,200 ----
    tree rval;
  
    if (TREE_CODE (init) != CALL_EXPR && TREE_CODE (init) != AGGR_INIT_EXPR)
!     return convert (type, init);
  
    slot = build (VAR_DECL, type);
    DECL_ARTIFICIAL (slot) = 1;


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