http://www.stlchina.org/twiki/bin/view.pl/Main/BoostSource_any ppLiu写的关于这个的文章
下面是实例代码
1.
int main(){ boost::any a; a = std::string("aaaa"); try { int val = boost::any_cast<int>(a); std::cout<<val<<std::endl; } catch(boost::bad_any_cast& b) { std::cout<<"error!"<<std::endl; } }
2.
#include <iostream>#include <string>#include <utility>#include <vector>#include <boost/any.hpp>class A {public: void some_function() {std::cout<<"A::some_function()"<<std::endl;}};class B {public: void some_function() {std::cout<<"B::some_function()"<<std::endl;} };class C {public: void some_function() {std::cout<<"C::some_function()"<<std::endl;}};void print_any(boost::any& a){ if(A* pA = boost::any_cast<A>(&a)) { pA->some_function(); } else if(B* pB = boost::any_cast<B>(&a)) { pB->some_function(); } else if(C* pC = boost::any_cast<C>(&a)) { pC->some_function(); } else { try { std::cout<<boost::any_cast<std::string>(a)<<std::endl; } catch(boost::bad_any_cast& b) { std::cout<<"Oops!"<<std::endl; } }}int main(){ std::vector<boost::any> store_anything; store_anything.push_back(A()); store_anything.push_back(B()); store_anything.push_back(C()); store_anything.push_back(std::string("love")); store_anything.push_back(3); store_anything.push_back(std::make_pair(true, 7.92)); std::for_each(store_anything.begin(), store_anything.end(), print_any);}
3.
