Thank you, I wasnt checking the return from find, The assert helped me
locate the actual problem which was in another call.
On Wed, Jan 14, 2009 at 11:30 PM,
Ramesh escribió:
Hello.
I am using projection technique & modify_key in one of my member functions:
Assuming I have the following data in the container:
ObjId ObjIp ObjIndex pMyObj
------------------------------------------------------------------------------------- ID1 10.10.1.2 1 0x10239032 ID2 10.10.1.3 2 0x23423423 ID3 10.10.1.4 3 0x23132423
The member function 'UpdateKeyObjId' accepts the value on column 3 as key & changes the corresponding value for the field in Column 1.
My code seems to work fine for all rows except the last row. When I use modify key on the last record, the app crashes at the highlighted line. I am not sure if my usage of project & modify_key right, could someone please point out if there are any errors in the usage?
Hello Ramesh,
At first sight your code appears correct. The only plausible way that I can figure out the offending statement can crash:
return MyContainer.get<0>().modify_key(ObjIdit, ll::_1 = param_ObjId);
happens if ObjIdit==MyContainer.end(). You can check this by placing an assertion before that:
typedef tMyObjMap::index<ObjIndex>::type tMyObjMapByIndex; tMyObjMapByIndex& ObjIndex_index = MyContainer.get<ObjIndex>();
tMyObjMap::index_iterator<ObjIndex>::type it = ObjIndex_index.find(param_ObjIndex);
assert(it!=ObjIndex_index.end());
...
If the assertion fails then there's simply no element with the given param_ObjIndex, which I guess you can trace back to some problem elsewhere in your program.
HTH,
Joaquín M López Muñoz Telefónica, Investigación y Desarrollo _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users