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boost::apply_visitor_delayed_t — Adapts a visitor for use as a function object.
template<typename Visitor> class apply_visitor_delayed_t { public: // types typedef typename Visitor::result_type result_type; // construct/copy/destruct explicit apply_visitor_delayed_t(Visitor &); // function object interface template<typename Variant> result_type operator()(Variant &); template<typename Variant1, typename Variant2> result_type operator()(Variant1 &, Variant2 &); };
Adapts the function given at construction for use as a function object. This is useful, for example, when one needs to operate on each element of a sequence of variant objects using a standard library algorithm such as std::for_each.
See the "visitor-only" form of apply_visitor for a simple way to create apply_visitor_delayed_t objects.
template<typename Variant> result_type operator()(Variant & operand); template<typename Variant1, typename Variant2> result_type operator()(Variant1 & operand1, Variant2 & operand2);
Invokes apply_visitor on the stored visitor using the given operands.
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