ptr_stack.h

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#ifndef PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#define PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66

#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
#pragma once
#endif

#include "yaml-cpp-pm/noncopyable.h"
#include <cstddef>
#include <cstdlib>
#include <memory>
#include <vector>

template <typename T>
class ptr_stack: private YAML_PM::noncopyable
{
public:
        ptr_stack() {}
        ~ptr_stack() { clear(); }
        
        void clear() {
                for(unsigned i=0;i<m_data.size();i++)
                        delete m_data[i];
                m_data.clear();
        }
        
        std::size_t size() const { return m_data.size(); }
        bool empty() const { return m_data.empty(); }
        
        void push(std::auto_ptr<T> t) {
                m_data.push_back(NULL);
                m_data.back() = t.release();
        }
        std::auto_ptr<T> pop() {
                std::auto_ptr<T> t(m_data.back());
                m_data.pop_back();
                return t;
        }
        T& top() { return *m_data.back(); }
        const T& top() const { return *m_data.back(); }
        
private:
        std::vector<T*> m_data;
};

#endif // PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66