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This is a slightly modified version of the patch attached to PR33558 which was posted to gcc-patches but apparently never reviewed. I don't know if the author of the original patch, Giovanni, has a copyright assignment but I think the change is obvious and I hope is sufficiently small to not need an assignment. I was in the process of making the same change when I found his patch on the PR and copied the wording of his diagnostic and testcase. Sun CC and g++ both incorrectly accept mutable references, so it might not be uncommon in the wild (I found a use in some production code yesterday.) This version of the patch allows mutable on reference members when -fpermissive is used, giving old code a transition path. I'll add a note to changes.html if this is approved. tested x86_64-linux, OK for trunk? cp/ChangeLog entry: 2010-12-18 Giovanni Funchal <gafunchal@gmail.com> Jonathan Wakely <jwakely.gcc@gmail.com> PR c++/33558 * decl.c (grokdeclarator): Reject mutable reference members. testsuite/ChangeLog entry: 2010-12-18 Giovanni Funchal <gafunchal@gmail.com> Jonathan Wakely <jwakely.gcc@gmail.com> PR c++/33558 * testsuite/g++.dg/other/pr33558.C: New. * testsuite/g++.dg/other/pr33558-2.C: New.
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