gistfile1.cpp

#include <string>
int main()
{
    std::string *sp = new std::string("hehe");
    sp->~string();//expected class-name before ‘(’ token
    operator delete (sp);
    return 0;
}
//----------file1-----------
#include <string>
using std::string;
int main()
{
    string *sp = new string("hehe");
    sp->~string();//通过
    operator delete (sp);
    return 0;
}
//--------file2---------
struct Ints {
    int ival;
    int ival1;
};

int main()
{
    Ints* p = new Ints{1,2};
    p->~Ints();
    operator delete (p);
    return 0;
}