Map's erase () frees memory

The map in the STL calls Erase (IT), and when the value is a pointer, the memory is freed:

1#include <iostream>2#include <map>3#include <string>4 5 using  namespacestd;6 structvalue{7     inti;8STD::stringtest;9 };Ten  One intMain () A { -std::map<int, value*>Test_map; -      for(intI=0; i<Ten; ++i) { thevalue* tmp =Newvalue (); -Tmp->i =i; -Tmp->test ="Test"; - Test_map.insert (Make_pair (i, TMP)); +     }    -  +      for(std::map<int, Value*>::iterator It=test_map.begin (); it!=test_map.end ();) { AStd::cout <<" First"<< It->first <<"Second"<< (it->second)->i <<" "<< (it->second)->test <<Std::endl; at         DeleteIt->second; -It->second =NULL; -         //test_map.erase (IT); Iterator invalidation; -      test_map.erase (it++); Prevent iterators from failing, remember and remember -     }   28/* Common Errors

     for (Std::map<int, Value*>::iterator it=test_map.begin (); it!=test_map.end (); ++it) {         std:: cout << "First" << It->first << "Second" << (it->second)->i << "" << (IT-&G T;second)->test << std::endl;23         Delete it->second;24         it->second = null;25         Test_map.erase (it);     The iterator fails         , and//erase iterator points to the content, the iterator direct invalidation, the next loop inside the ++it and so on any operation its results are undefined. Errors can be detected using Valgrind: Invalid read of size 8    }  
       */

 in     return 0; - } to  +[Email protected]:~/cp/test# g++ map3.cpp-g-Wall -[Email protected]:~/cp/test# ls-lt A. out the-rwxr-xr-x1Root root87224Jul9  One:xxA. out *[Email protected]:~/cp/test# valgrind--tool=memcheck--leak-check=full./A. out $==28426==Memcheck, a memory error detectorPanax Notoginseng==28426Copyright (C)2002- ., and GNU GPL'd, by Julian Seward et al. -==28426= = Using valgrind-3.7.0and Libvex; Rerun With-h forCopyright Info the==28426= = Command:./A. out +==28426== AFirst0Second0Test theFirst1Second1Test +First2Second2Test -First3Second3Test $First4Second4Test $First5Second5Test -First6Second6Test -First7Second7Test theFirst8Second8Test -First9Second9TestWuyi==28426== the==28426==HEAP SUMMARY: -==28426==inchUse at exit:0bytesinch 0blocks Wu==28426= = Total Heap Usage: -Allocs, -Frees,930Bytes Allocated -==28426== About==28426= = All heap blocks were freed--no leaks is possible $==28426== -==28426= = Counts of detected and suppressed errors, rerun with:-v -==28426= = ERROR SUMMARY:0Errors from 0Contexts (suppressed:2  from 2)

Map's erase () frees memory