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Struct template fold

boost::proto::fold — A PrimitiveTransform that invokes the fusion::fold<> algorithm to accumulate a value.

Synopsis

// In header: <boost/proto/transform/fold.hpp>

template<typename Sequence, typename State0, typename Fun> 
struct fold :  proto::transform<  {
  // member classes/structs/unions
  template<typename Expr, typename State, typename Data> 
  struct impl :  proto::transform_impl<  {
    // types
    typedef when<_,                                         ;            // For exposition only
    typedef when<_,                                           ;            // For exposition only
    typedef     ;          // A Fusion sequence, for exposition only
    typedef     ;       // An initial state for the fold, for exposition only
    typedef                                               ;          // fun(d)(s,e) == when<_,Fun>()(e,s,d)
    typedef  ;

    // public member functions
     (, 
                           , 
                           ) ;
  };
};

Description

For the complete description of the behavior of the proto::fold<> transform, see the documentation for the nested proto::fold::impl<> class template.


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