Forward declares boost::hana::is_a and boost::hana::is_an.  
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| Namespaces | |
| boost::hana | |
| Namespace containing everything in the library. | |
| Variables | |
| template<typename Tag , typename optional_T > | |
| constexpr auto | boost::hana::is_a = see-documentation | 
| Returns whether the tag of an object matches a given tag.  More... | |
| template<typename Tag , typename ... T> | |
| constexpr auto | boost::hana::is_an = is_a<Tag, T...> | 
| Equivalent to is_a; provided for consistency with the rules of the English language. | |
Forward declares boost::hana::is_a and boost::hana::is_an.