[Bug c++/43663] Can't take a const-ref to a bit field

[james.dennett at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43663

James Dennett <james.dennett at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |james.dennett at gmail dot
                   |                            |com

--- Comment #6 from James Dennett <james.dennett at gmail dot com> 2011-05-15 11:52:01 UTC ---
Here's a quick hack that causes a temporary to be generated when binding a
bit-field to a reference-to-const.

$ svn diff
Index: call.c
===================================================================
--- call.c    (revision 173769)
+++ call.c    (working copy)
@@ -8594,7 +8594,7 @@
     expr = error_mark_node;
       else
     {
-      if (!lvalue_or_rvalue_with_address_p (expr))
+      if (is_bitfield_expr_with_lowered_type (expr) ||
!lvalue_or_rvalue_with_address_p (expr))
         {
           tree init;
           var = set_up_extended_ref_temp (decl, expr, cleanup, &init);

I'll try to make time to clean that up and add regression tests before running
it by someone with stronger gcc-fu.