Developer Network >> Visual C++ & C++ Programming >> C++ (Non Visual C++ Issues)

deleting entries from the map using iterator

map<string, string> drrInternalUserStatusMap;
map<string , string>::iterator drrMapIter;
char caFleet[23];

...............
some where in the code drrInternelUserStatusMap got some entries
...............
...............

for (drrMapIter = drrInternalUserStatusMap.begin(); drrMapIter != drrInternalUserStatusMap.end(); )
{

getFleetFromUfmi(drrMapIter->second.c_str() , caFleet );
if ( !strcmp ( fleet.c_str() , caFleet ) )
{
LOG_L5 (( "\nCFL: Fleet Entry is found and deleting that fleet: %s" , caFleet ));
drrInternalUserStatusMap.erase ( tmpDrrMapIter++ );
}
else
{
drrMapIter++;
}
}

Above code is dumping core: following is that info:

#0 0x080667b9 in std::_Rb_tree_base_iterator::_M_increment (this=0xb68753b0)
at stl_tree.h:137
#1 0x08090695 in std::_Rb_tree_iterator<std::pair<std::string const, std::string>, std::pair<std::string const, std::string>&, std::pair<std::string const, std::string>*>::operator++ (
this=0xb68753b0) at stl_tree.h:207

Help me in resolving this issue.

[1225 byte] By [adapanaidu] at [2007-11-20 6:32:16]

«« [RESOLVED] Using a List control to update yes/no fields on a table in access usi
»» Any work in eLearning domain on Windows platform?

# 1 Re: deleting entries from the map using iterator

The problem is here:
drrInternalUserStatusMap.erase ( tmpDrrMapIter++ );

You need to do this:
tmpDrrMapIter = drrInternalUserStatusMap.erase (tmpDrrMapIter);

:)

http://msdn2.microsoft.com/en-us/library/z2f3cb7h(VS.71).aspx

Zaccheus at 2007-11-9 1:16:12 >

# 2 Re: deleting entries from the map using iterator

sorry gurus,

Small correction: it is not

drrInternalUserStatusMap.erase ( tmpDrrMapIter++ );

it is

drrInternalUserStatusMap.erase ( drrMapIter++ );

i am running this program on linux OS , using g++ compiler.

adapanaidu at 2007-11-9 1:17:17 >

# 3 Re: deleting entries from the map using iterator

Then it needs to be:

drrMapIter = drrInternalUserStatusMap.erase ( drrMapIter );

Zaccheus at 2007-11-9 1:18:16 >

# 4 Re: deleting entries from the map using iterator

that is not the error. Still it is dumping. What can be reason. Help me to rectify that bug.

adapanaidu at 2007-11-9 1:19:24 >

# 5 Re: deleting entries from the map using iterator

What error are you getting now ?

Zaccheus at 2007-11-9 1:20:23 >

# 6 Re: deleting entries from the map using iterator

same coredump.

adapanaidu at 2007-11-9 1:21:19 >

# 7 Re: deleting entries from the map using iterator

Strange. I can't see anything else wrong with your code.

Is it possible that getFleetFromUfmi is corrupting the stack ?

Zaccheus at 2007-11-9 1:22:23 >

# 8 Re: deleting entries from the map using iterator

that is not the error. Still it is dumping. What can be reason. Help me to rectify that bug.Without seeing the other parts of your code (the part where you do this -- "..........."), and all of those unknown functions, and we don't have any idea of anything else in your program except you're using a map and a loop, your bug could be anywhere.

Regards,

Paul McKenzie

Paul McKenzie at 2007-11-9 1:23:28 >

Visual C++ & C++ Programming

All Classified

Visual C++ & C++ Programming New Topic

Visual C++ & C++ Programming Hot Topic