shared_ptr放入set和vector中
#include <vector> #include <set> #include <iostream> #include <algorithm> #include <boost/shared_ptr.hpp> using namespace std; struct Foo{Foo(int _x) : x(_x){}~Foo(){cout<<"~Foo()"<<endl;}int x; }; typedef boost::shared_ptr<Foo> FooPtr; struct FooPtrOps{void operator() ( const FooPtr & a ){cout<< a->x <<endl;} bool operator()( const FooPtr & a, const FooPtr & b ){ return a->x > b->x; }};int main(){vector<FooPtr> foo_vector;set<FooPtr, FooPtrOps> foo_set;FooPtr foo_ptr(new Foo(2));foo_vector.push_back(foo_ptr);foo_set.insert(foo_ptr);foo_ptr.reset(new Foo(1));foo_vector.push_back(foo_ptr);foo_set.insert(foo_ptr);foo_ptr.reset(new Foo(3));foo_vector.push_back(foo_ptr);foo_set.insert(foo_ptr);foo_ptr.reset(new Foo(2));foo_vector.push_back(foo_ptr);foo_set.insert(foo_ptr);foo_ptr.reset(new Foo(4));foo_vector.push_back(foo_ptr);foo_set.insert(foo_ptr);cout<<"foo_vector"<<endl;for_each(foo_vector.begin(), foo_vector.end(), FooPtrOps() );cout<<"foo_set"<<endl;for_each(foo_set.begin(), foo_set.end(), FooPtrOps() );return 0;}
，谦受益，满招损。
