/*
 * Custom basic_string::operator new() - does not work yet
 *
 * $ g++ -std=gnu++11 -g std_string_custom_new1.cpp 
 * std_string_custom_new1.cpp:12:7: error: ?template<class _CharT, class _Traits, class _Alloc> class std::__cxx11::basic_string? used without template arguments
 *  12 | void *basic_string::operator new(size_t size)
 *     |       ^~~~~~~~~~~~
 */

#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

using namespace std;

char mymemoryarena[65536];
size_t mymemoryarena_index = 0;

void *basic_string::operator new(size_t size)
{
	write(1, "#mark", 5);
	void *ptr = &mymemoryarena[mymemoryarena_index];
	
	mymemoryarena_index += size;

	return ptr;
}

int main(int ac, char *av[])
{
	(void)puts("#start.");
	
	string *x1 = new string("hello");
	string *x2 = new string("world");
	
	string x3 = *x1 + string(" ") + *x2;
	
	cout << x3 << endl;


	(void)puts("#done.");
	return EXIT_SUCCESS;
}