Forward declares boost::hana::front.  
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| Namespaces | |
| boost::hana | |
| Namespace containing everything in the library. | |
| Variables | |
| constexpr auto | boost::hana::front | 
| Returns the first element of a non-empty iterable.Given a non-empty Iterable xswith a linearization of[x1, ..., xN],front(xs)is equal tox1. Ifxsis empty, it is an error to use this function. Equivalently,front(xs)must be equivalent toat_c<0>(xs), and that regardless of the value category ofxs(frontmust respect the reference semantics ofat).  More... | |
Forward declares boost::hana::front.