rnk added a comment.
I'm not sure your example is in scope for -Wshadow, though. Any function call
that takes a non-const reference to the parameter could modify it. I guess I'm
thinking something like:
void trim_in_place(std::string &s);
struct A {
std::string s;
A(std::string s) : s(s) { trim_in_place(s); }
};
I think if we try to match that we'll have too many false positives.
I think your example would be better caught by something like -Wconsumed that
looks for uses of objects that have been moved-from. That warning won't be
confused by shadowing and will give a better diagnostic anyway.
http://reviews.llvm.org/D18271
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