move-fail.cpp

#include <stdio.h>
#include <vector>
#include <set>

static bool s_log = false;
void message( const char* what )
{
	if( s_log )
	{
		printf( "%s\n", what );
	}
}

struct Something
{
	Something() { message( "default ctor" ); }
	Something( const Something& ) { message( "copy ctor" ); }
	Something( Something&& ) noexcept { message( "move ctor" ); }

	bool operator==( const Something& that ) const
	{
		return this == &that;
	}
	bool operator<( const Something& that ) const
	{
		return this < &that;
	}
};

int main()
{
	std::set<Something> set;
	set.insert( Something{} );

	s_log = true;

	std::vector<Something> vec(
		std::make_move_iterator( set.begin() ),
		std::make_move_iterator( set.end() ) );

	return 0;
}