Forward declares boost::hana::lazy.  
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| Classes | |
| struct | boost::hana::lazy< implementation_defined > | 
| hana::lazyimplements superficial laziness via a monadic interface.  More... | |
| struct | boost::hana::lazy_tag | 
| Tag representing hana::lazy.  More... | |
| Namespaces | |
| boost::hana | |
| Namespace containing everything in the library. | |
Forward declares boost::hana::lazy.