Forward declares boost::hana::pair.  
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| Classes | |
| struct | boost::hana::pair< First, Second > | 
| Generic container for two elements.  More... | |
| struct | boost::hana::pair_tag | 
| Tag representing hana::pair.  More... | |
| Namespaces | |
| boost::hana | |
| Namespace containing everything in the library. | |
Forward declares boost::hana::pair.