Why are structs not allowed in template definitions?

Posted by nils on Stack Overflow See other posts from Stack Overflow or by nils
Published on 2010-03-25T23:18:34Z Indexed on 2010/03/25 23:23 UTC
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The following code yields an error error: ‘struct Foo’ is not a valid type for a template constant parameter:

template <struct Foo>
struct Bar {

};

Why is that so?

template <class Foo>
struct Bar {

};

works perfectly fine and even accepts an struct as argument.

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