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    copied!<p>This is a place where C++03 and C++11 are different from each other. The relevant part of the standard is <code>[temp.local]/1</code>. In C++03, this states:</p> <blockquote> <p>Like normal (non-template) classes, class templates have an injected-class-name (clause 9). The injected-class-name can be used with or without a template-argument-list. When it is used without a template- argument-list, it is equivalent to the injected-class-name followed by the template-parameters of the class template enclosed in &lt;>. When it is used with a template-argument-list, it refers to the specified class template specialization, which could be the current specialization or another specialization.</p> </blockquote> <p>This means that <code>child</code> (without any template arguments) refers to the specialization <code>child&lt;V&gt;</code>. In C++11, it was changed to:</p> <blockquote> <p>Like normal (non-template) classes, class templates have an injected-class-name (Clause 9). The injected- class-name can be used as a template-name or a type-name. When it is used with a template-argument-list, as a template-argument for a template template-parameter, or as the final identifier in the elaborated-type-specifier of a friend class template declaration, it refers to the class template itself. Otherwise, it is equivalent to the template-name followed by the template-parameters of the class template enclosed in &lt;>.</p> </blockquote> <p>Note in particular <code>When it is used ... as a template-argument for a template template-parameter ... it refers to the class template itself.</code>. This means that in C++11, your code would be correct.</p>
 

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