In https://bugzilla.mozilla.org/show_bug.cgi?id=1353187 I just landed a patch that gives frame properties (which act like extended member variables) the semantics of member variables, so that if you have a |const nsIFrame*| you can still Get a property, but you can't Set or Remove it.
This required a pretty small number of adjustments to existing code. (I did this so that the primary patch in that bug wouldn't need to const_cast in order to set a frame state bit when a frame has properties, but it seemed like a good thing to do anyway.) -David -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla https://www.mozilla.org/ 𝄂 Before I built a wall I'd ask to know What I was walling in or walling out, And to whom I was like to give offense. - Robert Frost, Mending Wall (1914)
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