unqiue_ptr＜void＞

谁践踏了优雅 2023-01-03 04:16 141阅读 0赞

#include <iostream>
    #include <string.h>
    #include <unordered_map>
    #include <chrono>
    #include <vector>
    using std::string;
    string handle_;
    void set_handle(string handle) { 
      handle_ = std::move(handle);
    }
    
    #include <iostream>
    using namespace std;
    
    auto func = [](int x, int y) { 
      return x + y;
    };
    
    inline void test(){ 
      printf("this is a inlint test");
    }
    
    struct A { 
      int a[10];
    };
    
    struct B { 
      int *b [10];
    };
    
    enum T { 
      A=12,
      B=13
    };
    
    template<T A>
    struct EnumToDataType { 
    
    };
    
    
    void deleter (void const * data) { 
      int64_t const * p = static_cast<int64_t const*>(data);
      std::cout << *p << " located at " << p <<  " is being deleted";
      delete p;
    }
    
    int main() { 
      void * b =  malloc(8);
      int64_t c = 12;
      memcpy(b, &c, sizeof(c));
      std::unordered_map<std::string, std::unique_ptr<void, void(*)(void const*)> > a ;
    // a.insert(std::pair<std::string, unique_ptr<void>>{"12", static_cast<void*>(&b)});
    //
    // a.emplace("13", static_cast<void*>(&b));
    // { 
    
    // std::unique_ptr<void, void(*)(void const*)> d(b, deleter);
    
        typedef std::unique_ptr<void, void(*)(void const*)> UniqueV;
    // auto e = std::pair<std::string, UniqueV>("12", {b, deleter});
    // a.emplace(
    // "12", d);
        std::vector<UniqueV> uni_vec;
        uni_vec.push_back(UniqueV{ b, &deleter});
        auto it  = uni_vec.begin();
        std::cout << "it:" << *static_cast<uint64_t*>(it->get());
        uni_vec.erase(it);
    // uni_vec.pop_back();
    // }
    
      std::cout << "\n*b" << *static_cast<uint64_t*>(b);
      return 0;
    }

unqiue_ptr＜void＞

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