c++ - Unusual behaviour with std::list<myclass*>::iterator comparison -


i'm seeing unusual behavior when compare 2 iterators.

vector<list<myclass*>>   vlwatchers(10); list<myclass*>::iterator itcurrent, itend;  (int i(0); <= 9; ++i) {     itcurrent = vlwatchers[i].begin();     itend = vlwatchers[i].end();     while (itcurrent != itend)     {         //code     } }

will cause liste iterators incompatible error on while() line, , appears happen when = 0, although of time.

upon further investigation after error called, itend , itcurrent both equal 0xcdcdcdcd. weird part when step != compare operator, "this" pointer becomes 0xcdcdcdcd. shouldn't 0xcdcdcdcd value that's stored in iterators, not address of iterators themselves? or there sort of iterator black magic iterator both stores value , value? part of larger project, error repeatable.

thank in advance help!

let's follow logic chain (assuming first few lines of for loop described):

  • itcurrent->this == 0xcdcdcdcd, therefore ...
  • itcurrent == 0xcdcdcdcd, therefore ...
  • vlwatchers[i].begin() returned 0xcdcdcdcd, therefore ...
  • vlwatchers[i] invalid, therefore perhaps ...
    • i >= vlwatches.size(), or
    • vlwatchers invalid

i vote vlwatchers.size() == 0 somehow. can add check method detect case?


Comments

Post a Comment

Popular posts from this blog

c# - SharpSVN - How to get the previous revision? -

i trying find efficient way previous revision of file text comparison using sharpsvn. using (svnclient c = new svnclient()) { c.authentication.defaultcredentials = new networkcredential( configurationmanager.appsettings.get("svnserviceusername") , configurationmanager.appsettings.get("svnservicepassword") , configurationmanager.appsettings.get("svnservicedomain") ); c.authentication.sslservertrusthandlers += new eventhandler<svnsslservertrusteventargs>(authentication_sslservertrusthandlers); collection<svnfileversioneventargs> fileversioncollection = new collection<svnfileversioneventargs>(); svnrevisionrange range = new svnrevisionrange(0, this.hooks.revision); svnfileversionsargs args = new svnfileversionsargs(); args.retrieveproperties = true; args.range = range; foreach (svnchangeitem item in log.changedpaths) { string path = this.repositorypath + it...
Read more

c++ - Is it possible to compile a VST on linux? -

for class project i'm attempting write vst plugin backed cuda. current cuda workflow on linux box, i'd prefer compile , link there. according wikipedia , should possible (i couldn't find steinberg documentation relevant linux) can't find makefile or instructions on how build if aren't using xcode or visual studio. i'm vst 3 sdk doesn't support linux. when try compile plugin under linux, error: ./base/source/fatomic.cpp:39:30: fatal error: libkern/osatomic.h: no such file or directory this issue caused following code in "vst3 sdk/base/source/fatomic.cpp" #if mac #include <libkern/osatomic.h> #if mac_os_x_version_min_required > mac_os_x_version_10_4 #define native_atomic_type (volatile int32_t*) #else #define native_atomic_type (int32_t*) #endif #elif windows #include <windows.h> #endif but hope compiling under linux work vst sdk 2.4. reading. jvstwrapper seems run on lin...
Read more

url - Querystring manipulation of email Address in PHP -

i using third party application (email2http) send me emailid, body , message. unable retrieve email id due name appended on , enclosed < , >. here querystring getting. test.php?from=ajay+reddy &subject=cx&body=somebody when print variable in php returns name , not email id. $from = $_get['from']; echo $from; //output ajay reddy please suggest me how can emailid also. i dont want use post method due testing , debugging. it's working fine. forgot use htmlentities() in debugging.
Read more