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/******************************************************************************\
* This example is a simple dictionary implemented * using composable states. *
\******************************************************************************/
// This file is partially included in the manual, do not modify
// without updating the references in the *.tex files!
// Manual references: lines 22-44 (Actor.tex)
#include <string>
#include <iostream>
#include <unordered_map>
#include "caf/all.hpp"
using std::cout;
using std::endl;
using std::string;
using namespace caf;
namespace {
using dict = typed_actor<reacts_to<put_atom, string, string>,
replies_to<get_atom, string>::with<string>>;
class dict_behavior : public composable_behavior<dict> {
public:
result<string> operator()(get_atom, param<string> key) override {
auto i = values_.find(key);
if (i == values_.end())
return "";
return i->second;
}
result<void> operator()(put_atom, param<string> key,
param<string> value) override {
if (values_.count(key) != 0)
return unit;
values_.emplace(key.move(), value.move());
return unit;
}
protected:
std::unordered_map<string, string> values_;
};
} // namespace
void caf_main(actor_system& system) {
auto f = make_function_view(system.spawn<dict_behavior>());
f(put_atom::value, "CAF", "success");
cout << "CAF is the key to " << f(get_atom::value, "CAF") << endl;
}
CAF_MAIN()
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