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Message: [QUOTE="James Kanze, post: 3524676"] I don't understand your reasoning. There's not a single const object in my example. The template constructor is chosen when the argument is a non-const lvalue, because the instantiation of the template (C::C(C&)) is a better match. The compiler generated copy constructor has the signature C::C( C const& ) (in this case), and will be called when the argument is const, or isn't an lvalue---both case in which the template constructor couldn't be called. Note that the compiler generated copy constructor doesn't always take a const reference---if the class contains a member or has a base whose copy constructor (user provided) takes a non-const reference, the the compiler generated copy constructor will also take a non-const reference. Such cases are (hopefully) rare, however. [/QUOTE]