zhililab
commented
3 years ago 智能指针
void my_func()
{
int* valuePtr = new int(15);
int x = 45;
// ...
if (x == 45)
return; // here we have a memory leak, valuePtr is not deleted
// ...
delete valuePtr;
}
int main()
{
}using the unique_prt<> template:
#include <memory>
void my_func()
{
std::unique_ptr<int> valuePtr(new int(15));
int x = 45;
// ...
if (x == 45)
return; // no memory leak anymore!
// ...
}
int main()
{
}对比
unique_ptr vs shared_ptr vs weak_ptr vs auto_ptr
-- 参考资料： https://en.cppreference.com/book/intro/smart_pointers https://juejin.cn/post/6844903993055920141
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