Netbeans中错误的“无法解析标识符”

Question

My program compiles fine, but Netbeans tells me "Unable to resolve identifier to_string."

I tried everything in " Netbeans 7.2 shows "Unable to resolve identifier" , although build is successful " and I set the "C++ standard" to "C++11" in the code assistance options.

This is the only function giving this problem so far. It is however also the first C++11 feature I am using, which leads me to believe it has something to do with Netbeans not understanding that I am using C++11, although I specify it explicitly in the code assistance menu.

Minimal example:

#include <string>
int main() {
    std::to_string(1);
}

EDIT: the same problem arises where using nullptr

EDIT2: I suddenly realized it might be important to mention that I do not use a generated Makefile, but SCons.

Answer 1

I know this question is seven months old but since it came up as the second result to a google search I'll tell the answer I came up with. For Netbeans at least. Go to your project properties and make sure you have you "C Compiler"->"C Standard" set to C11, and your "C++ compiler"->"C++ Standard" set to C++11. You have to set BOTH or it will still give false errors!

Answer 2

Autocomplete and sometimes even syntax highlighting are always faulty with C++. The more you go in depth with C++ and C++11, the more Eclipse and Netbeans will start underlining everything with a red wavy line. Some of my (correct and perfectly compiling) programs are a huge red wavy line. I suggest you disable error markers altogether and you keep autocomplete, but in many cases it just won't work and you have to make the best of it.

Answer 3

I had the same situation. This was occurred because I used .c file instead of .cpp

Answer 4

This will solve the problem:

1. Right click on " Project ".
2. Select " Code Assistance ".
3. Clean C/C++ cache.
4. Restart IDE.

Answer 5

对于Netbeans 8.2（在Linux上），只有以下工作对我__cplusplus=199711L ：工具 - >选项 - >代码帮助 - >宏定义：更改： __cplusplus=199711L到： __cplusplus=201402L用于C ++ 14或到__cplusplus=201103L用于C + +11

Answer 6

我做了以上所有但是对我来说诀窍是认识到Makefile有g ++而不是g ++ -std = c ++ 11。

Answer 7

要在最新的netbeans 8.2或9版本中解决与c ++ 17相关的“无法解析标识符”，可能需要将宏定义__cplusplus = 201703L设置为默认的C ++ 14标准宏定义，无法解决出现的那些意外错误消息在编辑器中。