* g++.old-deja/g++.other/cast3.C: New test.

From-SVN: r31035

gcc/testsuite/ChangeLog

+1999-12-20  Nathan Sidwell  <nathan@acm.org>
+
+	* g++.old-deja/g++.other/cast3.C: New test.
+
 1999-12-14  Bernd Schmidt  <bernds@cygnus.co.uk>
 
 	* gcc.dg/991214-1.c: Use "__asm__", not "asm".

gcc/testsuite/g++.old-deja/g++.other/cast3.C

+// Build don't link:
+// Copyright (C) 1999 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 12 Dec 1999 <nathan@acm.org>
+
+// static_cast should not cast _away_ constness ([expr.static.cast]/6),
+// but nothing bans _adding_ constness. [expr.static.cast]/10 states that a
+// pointer of type cv void can be cast to pointer to object type.
+
+struct X;
+struct Y {};
+struct Z : Y {};
+
+void fn (void *p, void const *cp, Y *yp, Y const *ycp, Z *zp, Z const *zcp)
+{
+  static_cast <X *> (p);
+  static_cast <X const *> (p);
+  static_cast <int *> (p);
+  static_cast <int const *> (p);
+  static_cast <int **> (p);
+  static_cast <int const **> (p);
+  static_cast <int *const *> (p);
+  static_cast <int const *const *> (p);
+  
+  static_cast <X *> (cp);           // ERROR - lose const
+  static_cast <X const *> (cp);
+  static_cast <int *> (cp);         // ERROR - lose const
+  static_cast <int const *> (cp);
+  static_cast <int **> (cp);        // ERROR - lose const
+  static_cast <int const **> (cp);  // ERROR - lose const
+  static_cast <int *const *> (cp);
+  static_cast <int const *const *> (cp);
+  
+  static_cast <Z *> (yp);
+  static_cast <Z const *> (yp);
+
+  static_cast <Z *> (ycp);          // ERROR - lose const
+  static_cast <Z const *> (ycp);
+
+  static_cast <Y *> (zp);
+  static_cast <Y const *> (zp);
+
+  static_cast <Y *> (zcp);          // ERROR - lose const
+  static_cast <Y const *> (zcp);
+}