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            Finds the first element within a sequence with a type for which a given
            MPL
            Lambda Expression evaluates to boost::mpl::true_.
          
template< typename F, typename Sequence > typenameresult_of::find_if<Sequence const, F>::type find_if(Sequence const& seq); template< typename F, typename Sequence > typenameresult_of::find_if<Sequence, F>::type find_if(Sequence& seq);
Table 1.56. Parameters
| Parameter | Requirement | Description | 
|---|---|---|
| 
                       | A model of Forward Sequence | The sequence to search | 
| 
                       | A unary MPL Lambda Expression | The search predicate | 
find_if<F>(seq)
            Return type: An iterator of the same
            iterator category as the iterators of seq.
          
            Semantics: Returns the first element
            of seq for which MPL
            Lambda Expression F
            evaluates to boost::mpl::true_, or end(seq)
            Linear. At most result_of::size<Sequence>::value
#include <boost/fusion/algorithm/query/find_if.hpp> #include <boost/fusion/include/find_if.hpp>
constvector<double,int> vec(1.0,2); assert(*find_if<is_integral<mpl::_> >(vec) == 2); assert(find_if<is_class<mpl::_> >(vec) ==end(vec));