Hi all,
According to the docs
http://www.boost.org/libs/property_map/property_map.html, "Invoking a
property map function on an /invalid/ key results in undefined behavior."
True enough; memory is corrupted. How do I prevent this if I am not
sure my key is valid. Do I have to keep a list of valid keys separately
from my property map?
Thanks,
-d
#include <iostream>
#include <map>
#include <string>
#include
template <typename AddressMap>
void foo(AddressMap address)
{
typedef typename boost::property_traits<AddressMap>::value_type value_type;
typedef typename boost::property_traits<AddressMap>::key_type key_type;
value_type old_address, new_address;
key_type fred = "Fred";
old_address = get(address, fred);
new_address = "384 Fitzpatrick Street";
put(address, fred, new_address);
key_type joe = "Joe";
value_type& joes_address = address[joe];
joes_address = "325 Cushing Avenue";
}
int
main()
{
std::map name2address;
boost::associative_property_map< std::map >
address_map(name2address);
name2address.insert(make_pair(std::string("Fred"),
std::string("710 West 13th Street")));
name2address.insert(make_pair(std::string("Joe"),
std::string("710 West 13th Street")));
foo(address_map);
for (std::map::iterator i = name2address.begin();
i != name2address.end(); ++i)
std::cout << i->first << ": " << i->second << "\n";
return EXIT_SUCCESS;
}
David Ohlemacher