E0020 ошибка visual studio
When a Source Control Plug-in API function returns an error, it is expected to be one of the following error codes. All errors are negative, warnings or informational error codes are positive, and success is 0.
Error Code | Value | Description |
---|---|---|
SCC_I_SHARESUBPROJOK | 7 | Plug-in supports adding files from source control in two steps. For more information, see SccSetOption. |
SCC_I_FILEDIFFERS | 6 | The local file is different from the file in the source control database (for example, SccDiff may return this value). |
SCC_I_RELOADFILE | 5 | Local file was changed during the source control operation; the IDE should reload the file if possible. |
SCC_I_FILENOTAFFECTED | 4 | The file is not affected. |
SCC_I_PROJECTCREATED | 3 | The Project was created during the source control operation (for example, during a call to SccOpenProject when SCC_OP_CREATEIFNEW flag is specified). |
SCC_I_OPERATIONCANCELED | 2 | Operation was cancelled. |
SCC_I_ADV_SUPPORT | 1 | Plug-in supports advanced options for the specified command. For more information, see SccGetCommandOptions. |
SCC_OK | 0 | Success. |
SCC_E_INITIALIZEFAILED | -1 | Error: initialization failed. |
SCC_E_UNKNOWNPROJECT | -2 | Error: project is unknown. |
SCC_E_COULDNOTCREATEPROJECT | -3 | Error: project could not be created. |
SCC_E_NOTCHECKEDOUT | -4 | Error: the file is not checked out. |
SCC_E_ALREADYCHECKEDOUT | -5 | Error: the file is already checked out. |
SCC_E_FILEISLOCKED | -6 | Error: the file is locked. |
SCC_E_FILEOUTEXCLUSIVE | -7 | Error: the file is exclusively checked out. |
SCC_E_ACCESSFAILURE | -8 | There was a problem accessing the source control system, probably due to network or contention issues. A retry is recommended. |
SCC_E_CHECKINCONFLICT | -9 | Error: there was a conflict during check in. |
SCC_E_FILEALREADYEXISTS | -10 | Error: the file already exists. |
SCC_E_FILENOTCONTROLLED | -11 | Error: the file is not under source control. |
SCC_E_FILEISCHECKEDOUT | -12 | Error: the file is checked out. |
SCC_E_NOSPECIFIEDVERSION | -13 | Error: there is no specified version. |
SCC_E_OPNOTSUPPORTED | -14 | Error: the operation is not supported. |
SCC_E_NONSPECIFICERROR | -15 | Nonspecific error. |
SCC_E_OPNOTPERFORMED | -16 | Error, the operation was not performed. |
SCC_E_TYPENOTSUPPORTED | -17 | Error: the type of the file, for example, binary, is not supported by the source code control system. |
SCC_E_VERIFYMERGE | -18 | File has been auto-merged but has not been checked because it is pending user verification. |
SCC_E_FIXMERGE | -19 | File has been auto-merged but has not been checked in due to a merge conflict that must be manually resolved. |
SCC_E_SHELLFAILURE | -20 | Error due to a shell failure. |
SCC_E_INVALIDUSER | -21 | Error: the user is invalid. |
SCC_E_PROJECTALREADYOPEN | -22 | Error: the project is already open. |
SCC_E_PROJSYNTAXERR | -23 | Project syntax error. |
SCC_E_INVALIDFILEPATH | -24 | Error: the file path is invalid. |
SCC_E_PROJNOTOPEN | -25 | Error: the project is not open. |
SCC_E_NOTAUTHORIZED | -26 | Error: the user is not authorized to perform this operation. |
SCC_E_FILESYNTAXERR | -27 | File syntax error. |
SCC_E_FILENOTEXIST | -28 | Error, the local file does not exist. |
SCC_E_CONNECTIONFAILURE | -29 | Error: there was a connection failure. |
SCC_E_UNKNOWNERROR | -30 | Unknown error. |
SCC_E_BACKGROUNDGETINPROGRESS | -31 | Background get operation is currently in progress. |
Macros provided for quick checking
Remarks
All Source Control Plug-in API functions (except the SccAdd, SccCheckin, and SccDiff) are expected to succeed when the local files that are passed as arguments do not exist in the working folder. For example, the IDE may issue a call to the SccCheckout or SccUncheckout on a file that does not exist in the working folder, but exists in the source control system. This call would succeed. Only when there is no file in the working folder or in the source control system is the function expected to fail.
Certain functions, such as SccAdd and SccCheckin , should specifically return SCC_E_FILENOTEXIST when the file in the working folder does not exist. Other functions are expected to succeed when the working file does not exist, if the functions operate on a valid file name in the source control system.
The source control plug-in should make no assumptions regarding privileges on a file in the working folder, even if the plug-in had marked the file read-only during some operation. A file in the working folder can be moved, deleted, and changed outside the plug-in's control.
Когда функция API подключаемого модуля системы управления версиями возвращает ошибку, ожидается один из следующих кодов ошибок. Все ошибки отрицательны, предупреждения или информационные коды ошибок являются положительными, а успешно — 0.
Код ошибки | Значение | Описание |
---|---|---|
SCC_I_SHARESUBPROJOK | 7 | Подключаемый модуль поддерживает добавление файлов из системы управления версиями в два этапа. Дополнительные сведения см. в разделе скксетоптион. |
SCC_I_FILEDIFFERS | 6 | Локальный файл отличается от файла в базе данных системы управления версиями (например, сккдифф может вернуть это значение). |
SCC_I_RELOADFILE | 5 | Локальный файл был изменен во время операции системы управления версиями; по возможности интегрированная среда разработки должна перезагрузить файл. |
SCC_I_FILENOTAFFECTED | 4 | На этот файл не влияет. |
SCC_I_PROJECTCREATED | 3 | Project был создан во время операции системы управления версиями (например, во время вызова сккопенпрожект , когда SCC_OP_CREATEIFNEW указан флаг). |
SCC_I_OPERATIONCANCELED | 2 | Операция отменена. |
SCC_I_ADV_SUPPORT | 1 | Подключаемый модуль поддерживает дополнительные параметры для указанной команды. Дополнительные сведения см. в разделе SccGetCommandOptions. |
SCC_OK | 0 | Успешно. |
SCC_E_INITIALIZEFAILED | -1 | Ошибка: сбой инициализации. |
SCC_E_UNKNOWNPROJECT | -2 | Ошибка: проект неизвестен. |
SCC_E_COULDNOTCREATEPROJECT | –3 | Ошибка: не удалось создать проект. |
SCC_E_NOTCHECKEDOUT | –4 | Ошибка: файл не извлечен. |
SCC_E_ALREADYCHECKEDOUT | -5 | Ошибка: файл уже извлечен. |
SCC_E_FILEISLOCKED | –6 | Ошибка: файл заблокирован. |
SCC_E_FILEOUTEXCLUSIVE | -7 | Ошибка: файл извлечен в монопольном режиме. |
SCC_E_ACCESSFAILURE | –8 | Возникла проблема при доступе к системе управления версиями, возможно, из-за проблем с сетью или состязаниями. Рекомендуется повторить попытку. |
SCC_E_CHECKINCONFLICT | –9 | Ошибка: при возврате возник конфликт. |
SCC_E_FILEALREADYEXISTS | –10 | Ошибка: файл уже существует. |
SCC_E_FILENOTCONTROLLED | -11 | Ошибка: файл не находится в системе управления версиями. |
SCC_E_FILEISCHECKEDOUT | -12 | Ошибка: файл извлечен. |
SCC_E_NOSPECIFIEDVERSION | -13 | Ошибка: указанная версия отсутствует. |
SCC_E_OPNOTSUPPORTED | -14 | Ошибка: операция не поддерживается. |
SCC_E_NONSPECIFICERROR | – 15 | Неспецифическая ошибка. |
SCC_E_OPNOTPERFORMED | -16 | Ошибка. операция не была выполнена. |
SCC_E_TYPENOTSUPPORTED | -17 | Ошибка: тип файла, например binary, не поддерживается системой управления исходным кодом. |
SCC_E_VERIFYMERGE | –18 | Файл был успешно объединен, но не проверен, так как он ожидает проверки пользователя. |
SCC_E_FIXMERGE | -19 | Файл был автоматически объединен, но не был возвращен из-за конфликта слияния, который необходимо разрешить вручную. |
SCC_E_SHELLFAILURE | –20 | Ошибка из-за сбоя оболочки. |
SCC_E_INVALIDUSER | -21 | Ошибка: недопустимый пользователь. |
SCC_E_PROJECTALREADYOPEN | -22 | Ошибка: проект уже открыт. |
SCC_E_PROJSYNTAXERR | -23 | синтаксическая ошибка Project. |
SCC_E_INVALIDFILEPATH | – 24 | Ошибка: недопустимый путь к файлу. |
SCC_E_PROJNOTOPEN | -25 | Ошибка: проект не открыт. |
SCC_E_NOTAUTHORIZED | – 26 | Ошибка: пользователь не имеет права на выполнение этой операции. |
SCC_E_FILESYNTAXERR | -27 | Синтаксическая ошибка в файле. |
SCC_E_FILENOTEXIST | -28 | Ошибка, локальный файл не существует. |
SCC_E_CONNECTIONFAILURE | -29 | Ошибка. произошла ошибка подключения. |
SCC_E_UNKNOWNERROR | –30 | Неизвестная ошибка. |
SCC_E_BACKGROUNDGETINPROGRESS | -31 | Фоновая операция получения сейчас выполняется. |
Предоставлены макросы для быстрой проверки
Remarks
Все функции API подключаемого модуля системы управления версиями (за исключением сккадд, сккчеккини сккдифф) должны выполняться успешно, если локальные файлы, передаваемые в качестве аргументов, не существуют в рабочей папке. Например, интегрированная среда разработки может выдать вызов сккчеккаут или сккунчеккаут для файла, который не существует в рабочей папке, но существует в системе управления версиями. Этот вызов будет выполнен. Если в рабочей папке нет файла или в системе управления версиями, то ожидается сбой функции.
Некоторые функции, такие как SccAdd и SccCheckin , должны возвращать, SCC_E_FILENOTEXIST Если файл в рабочей папке не существует. Другие функции должны выполняться, если рабочий файл не существует, если функции работают с допустимым именем файла в системе управления версиями.
Подключаемый модуль системы управления версиями не должен делать никаких предположений о правах доступа к файлу в рабочей папке, даже если во время некоторой операции подключаемый модуль пометил файл как доступный только для чтения. Файл в рабочей папке можно перемещать, удалять и изменять вне управления подключаемым модулем.
Why when i literally copy paste some code, there is always so many errors. I checked semantics and everything is correct. I will link my source code and source i got it from. Btw c++ is backwards compatible right? Or it would compile using older ISO standard no? So i don't think that's it. And i am using VS community 19, so not having newest standard is not problem either.
Following is source code in my program:
I tried to google: c++ error code E0020, with description from VS: identifier "while" is undefined. And google literally didn't find any result. So whole search would be like: c++ error code E0020 "identifier "while" is undefined"
And nothing was found. Wait what. How does something basic like that not even finds?
while, lower case, not While with an upper case w.
Too many youtube coding videos are garbage.
While I agree, the capital W is not the youtube channel's fault. It's lowercase in both the video and the pastebin link.
Compiler error message give line numbers to point to where the error is, so next time you run into something like this, look around the line number it tells you to spot typos.
Anywho, C++ is case-sensitive, so be aware of that.
Btw c++ is backwards compatible right? |
This isn’t standard c++ anyway. conio.h is a windows extension.
But you clearly DIDN’T copy-paste the code, or it wouldn’t have suffered an uppercase/lowercase malfunction.
Hmm i could swear i saw big W, i can't explain it now as i look on the video. But i don't think that's it usually. Than probably it was incorrect code many times. I couldn't paste code from video. I should say, i written it myself according to the video. But i double checked it, before post.
Yeah i know about line number, which shows where is the error, it usually doesn't help me. I try to find error in a context of code, but i don't find anything in 99% of cases. I know it is case sensitive. I really don't know why i wrote large W in this case and i don't think semantics are usually the problem.
And because it is not completely backwards compatible as Ganado say i guess. Or some extension.
Anyway, i really don't know why even description doesn't find any results on google. And usually: even if i try include context with it and error code.
It is so annoying, i am trying to create simple c++ program, which detects a keypress and googling keeps finding solutions, which using extensions, or deprecated functions. Should i create new post, or ask in this for help ? I am reading rules, but i don't even know, if this forums is meant for posting questions: about how to make a program.
c++ is only somewhat portable and backwards compatible, even if you ignore all libraries outside the language (eg, cstdlib is ok but conio isnt). Really old code that may have depended on integers being 32 bit or 16 bit instead of 64, for example, could be unfixable to get working today -- all it takes is one line that assumes the size of a type that has since changed and it can break badly.
These issues can be addressed now, with precisely named types (eg int64_t) but back when, those did not exist and the coder just did what made sense.
this is just a gap in the language. Keypress isnt easy to do in c++ without operating system extensions, because of how the I/O part is handled at both ends (both by the c++ compiler/language and by the OS/hardware). Its doable, but its not simple at all, and many a coder has found this to be an aggravation. Just use the extension for your compiler/os, and if its portable, code it for each and put a compiler flag around it to use the right one for the target.
For windows specifically, getch is an option but visual studio lets you pull in keypress as well, which is a little more powerful and smart. Either one is the way to go. If you can't get getch working, . there should be a way to help you through that, post new errors after you fix the while etc.
Yes, ask here for help. There should be some examples of both getch and keypress in these forums as well, if you search old posts. When asking here, post your code, what you want to do, and what is wrong with your own code if any (error messages? bug info eg I put in x, I get y, and I wanted z)
I am getting below errors while trying to compile the code in vs.
How can I fix it? Should I use _WIN32 instead of WIN32?
E1696 cannot open source file "sys/socket.h"
E1696 cannot open source file "netinet/in.h"
E1696 cannot open source file "unistd.h"
E1696 cannot open source file "netdb.h"
E1696 cannot open source file "arpa/inet.h"
E0020 identifier "sockaddr_in" is undefined
E0020 identifier "gethostbyname" is undefined
E0020 identifier "AF_INET" is undefined
Should I download the pthreads from the below link and add all .h files, .lib files and .dll to visual studio project path?
Below are new errors, I see now.
Error C4996 'strerror': This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
Error C4996 'gethostbyname': Use getaddrinfo() or GetAddrInfoW() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings
Error C4996 'inet_ntoa': Use inet_ntop() or InetNtop() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings
But after I change the code to the below, its gone.
Any idea what is the below error?
Error C4996 'strerror': This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
After I add the below line, the above error is gone.
But i got the below error codes in my cout, as shown below. Any idea what it means? How to overcome this errors?
Since issue seen only with pthread, I suspect in pthread.h, should below struct be changed? is it VS2019 compiler bug in windows? is there any other way to get the thread id of a pthread in c++ windows?
I actually followed steps mentioned in below link to add pthread to vs2019. should i revert back these changes?
Refactoring to use std::thread is a solution. But your error is that it doesn't know how to use the << operator with cout (std::ostream&) and a pthread_t.
<>If you got rid of that cout line, see if it compiles. Then, once you get it to compile, explain what you are actually trying to print out with that line.
Ok I have tried to revert those changes mentioned in the below link. But i got the below set of errors in VS2019. what is missing here now?
how can I use C++ threads? Do i need to go to NuGet Packages..>Browse>search and find pthreads >Install? OR use Vcpkg to install and use pthread in Windows? I know that pthread is for Linux POSIX threads and is not combined with VS2019.
Severity Code Description Project File Line Suppression State
Error (active) E1696 cannot open source file "pthread.h"
Error (active) E0020 identifier "pthread_t" is undefined
Error (active) E0020 identifier "pthread_create" is undefined
Error (active) E0020 identifier "pthread_self" is undefined
Error (active) E0020 identifier "pthread_detach" is undefined
Error (active) E0020 identifier "pthread_self" is undefined
After i installed pthread using NuGet, all those above errors are gone, but I got the below error, which was resolved by adding the below line in \packages\pthreads.2.9.1.4\build\native\include\pthread.h
I just upgraded to Visual Studio 2017 Community Edition and I have trouble loading standard header files. I get 507 errors from various header files. Here are some snippets:
Some of the errors:
I never had this issue with Visual Studio 2015 Community Edition. Am I missing some component from the Installer? Any help would be appreciated. Thank you!
6 Answers 6
I got the errors to go away by installing the Windows Universal CRT SDK component, which adds support for legacy Windows SDKs. You can install this using the Visual Studio Installer:
If the problem still persists, you should change the Target SDK in the Visual Studio Project : check whether the Windows SDK version is 10.0.15063.0.
In : Project -> Properties -> General -> Windows SDK Version -> select 10.0.15063.0.
Then errno.h and other standard files will be found and it will compile.
Thanks, you save my time. Cause I build cocos2dx game from Visual Studio, and it miss file string.h, math.h. install your sugggest Window Universal CRT SDK, it works like a charm.
If the problem is not solved by above answer, check whether the Windows SDK version is 10.0.15063.0.
Project -> Properties -> General -> Windows SDK Version -> select 10.0.15063.0
After this rebuild the solution.
For some reason this was needed. In my case SDK 8.1 was selected. On changing to 10.0.15063.0 it worked.
the simple answer is keep the sdk version of your project in properties and the same installed on your machine
If anyone's still stuck on this, the easiest solution I found was to "Retarget Solution". In my case, the project was built of SDK 8.1, upgrading to VS2017 brought with it SDK 10.0.xxx.
To retarget solution: Project->Retarget Solution->"Select whichever SDK you have installed"->OK
From there on you can simply build/debug your solution. Hope it helps
I upgraded VS2017 from version 15.2 to 15.8. With version 15.8 here's what happened:
Project -> Properties -> General -> Windows SDK Version -> select 10.0.15063.0 no longer worked for me! I had to change it to 10.0.17134.0 and then everything built again. After the upgrade and without making this change, I was getting the same header file errors.
I would have submitted this as a comment on one of the other answers but I don't have enough reputation yet.
This problem may also happen if you have a unit test project that has a different C++ version than the project you want to test.
- EXE with C++ 17 enabled explicitly
- Unit Test with C++ version set to "Default"
Solution: change the Unit Test to C++17 as well.
If the instalation of Windows Universal CRT SDK as described in the acceped answer did not help. Try to check this:
In case the directory "C:\Program Files\Windows Kits" exists on your system ensure that it contains "10/Include" and "10/Lib" subdirectories. If not create hard links there to thoose present in your "C:\Program Files (x86)\Windows Kits\10"
Explanation: As you can see from C:\Program Files (x86)\Windows Kits\10\DesignTime\CommonConfiguration\Neutral\uCRT.props the path "C:\Program Files\Windows Kits" is prefered over "C:\Program Files (x86)\Windows Kits" if it exists!
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