The first example's second case won't compile (complains it expected a class after ~) but the second one through the template does. Anyone know what I'm doing wrong?

int_doesnt_work.cpp

#include <string>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <malloc/malloc.h>


using namespace std;

int main()
{
	void *p = malloc(sizeof(std::string));
	
	std::string *a = new(p) std::string();
	
	a->~string();

	size_t size = malloc_size(p);
	
	printf("after destructing size = %ld\n", size);
	
	void *q = malloc(sizeof(int));
	
	int *i = new (q) int();
	
	i->~int();

	size = malloc_size(q);
	
	printf("after destructing size = %ld\n", size);
	
	return 0;
	
}

int_works_through_template.cpp

#include <string>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <malloc/malloc.h>


using namespace std;

template <class T>
void DeleteIt(T *x) { x->~T(); }

int main()
{
	void *p = malloc(sizeof(std::string));
	
	std::string *a = new(p) std::string();
	
	DeleteIt(a);
	
	size_t size = malloc_size(p);
	
	printf("after destructing size = %ld\n", size);
	
	void *q = malloc(sizeof(int));
	
	int *i = new (q) int();
	
	DeleteIt(i);

	size = malloc_size(q);
	
	printf("after destructing size = %ld\n", size);
	
	return 0;
	
}