C++ Eclipse 索引器无法解析 shared_ptr
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Eclipse indexer can't resolve shared_ptr
提问by Dylan Klomparens
After researching this on the internet, I've been unable to get the Eclipse indexer to resolve "shared_ptr" from the C++0x additions that come with GCC 4.4.4. I made sure to create my project with the proper includes for Eclipse, so it's definitely looking in the the 4.4.4 include folders.
在 Internet 上对此进行研究后，我一直无法让 Eclipse 索引器从 GCC 4.4.4 附带的 C++0x 添加项中解析“shared_ptr”。我确保使用适当的 Eclipse 包含创建我的项目，因此它肯定会在 4.4.4 包含文件夹中查找。
The program compiles and runs just fine. To access shared_ptr I'm using "#include <memory>".
该程序编译并运行得很好。要访问 shared_ptr，我正在使用“#include <memory>”。
Any idea what's breaking the indexer?
知道是什么破坏了索引器吗？
回答by Dave S
You need to set the pre-processor symbol '__GXX_EXPERIMENTAL_CXX0X__' to the eclipse project. g++ automatically adds that when you use '-std=c++0x', but eclipse is not aware of that, so it treats those sections of the relevant headers as disabled.
您需要将预处理器符号 ' __GXX_EXPERIMENTAL_CXX0X__' 设置为 eclipse 项目。g++ 会在您使用“-std=c++0x”时自动添加，但 eclipse 不知道这一点，因此它将相关标题的那些部分视为已禁用。
回答by Dean Hill
I experienced this problem under Windows with Eclipse 4.5.1 (Mars.1) and Cygwin 2.3.0 (GCC 4.9.3).
我在使用 Eclipse 4.5.1 (Mars.1) 和 Cygwin 2.3.0 (GCC 4.9.3) 的 Windows 下遇到了这个问题。
The indexer can't find shared_ptr because of lines like this in the <memory> header. The __cplusplus macro is evaluating to something other than C++ 11 (aka 201103) so the older auto_ptr.h is being included instead of shared_ptr.h. Why? The below screen shot of the project properties shows that C++ 98 (199711) is being detected under CDT GCC Build-in Compiler Settings.
由于 <memory> 标头中的类似行，索引器无法找到 shared_ptr。__cplusplus 宏正在评估 C++ 11（又名 201103）以外的内容，因此包含较旧的 auto_ptr.h 而不是 shared_ptr.h。为什么？下面的项目属性屏幕截图显示在 CDT GCC 内置编译器设置下检测到 C++ 98 (199711)。
#if __cplusplus >= 201103L
# include <bits/shared_ptr.h>
#else
# include <backward/auto_ptr.h>
#endif
There are two possible solutions to tell Eclipse to use C++ :
有两种可能的解决方案告诉 Eclipse 使用 C++：
On the same Preprocessor Include Paths screen, scroll to the top of the Setting Entries area. Expand CDT User Setting Entries. Add a new Preprocessor Macro for __cplusplus=201103L. Do this for both the Release and Debug Configurations. Then rebuild the index.
If you want to default the CDT GCC Build-in Compiler Settings to use 201103 for all projects, then edit the language.settings.xml file (under Windows this is c:\Users\deanhill\workspace\.metadata\.plugins\org.eclipse.cdt.core\language.settings.xml). Set __cplusplus=201103L. Restart Eclipse and rebuild the index.
在同一个 Preprocessor Include Paths 屏幕上，滚动到 Setting Entries 区域的顶部。展开 CDT 用户设置条目。为 __cplusplus=201103L 添加一个新的预处理器宏。为发布和调试配置执行此操作。然后重建索引。
如果要默认 CDT GCC 内置编译器设置为所有项目使用 201103，请编辑 language.settings.xml 文件（在 Windows 下，这是 c:\Users\deanhill\workspace\.metadata\.plugins\org .eclipse.cdt.core\language.settings.xml）。设置 __cplusplus=201103L。重新启动 Eclipse 并重建索引。
回答by Makketronix
Although I am late to the game, this is what worked for me:
虽然我玩游戏迟到了，但这对我有用：
Right-Click on Project->Properties->C/C++ General->Preprocessor Include Paths, Macros, etc. --> Click "Providers" tab --> CDT GCC Built-in Compiler Settings
右键Project->Properties->C/C++ General->Preprocessor Include Paths、Macros等-->点击“Providers”选项卡--> CDT GCC Built-in Compiler Settings
Uncheck "Use global provider shared between projects"
取消选中“使用项目之间共享的全局提供程序”
Add -std=c++0x
添加 -std=c++0x
It will then look something like this:
然后它看起来像这样：
${COMMAND} ${FLAGS} -E -P -v -dD -std=c++0x "${INPUTS}"
Rebuild index.
重建索引。
Using Debian Jessie + Eclipse Kepler Build id: 20140224-0627
使用 Debian Jessie + Eclipse Kepler 构建 ID：20140224-0627
回答by da-na
I experienced the same problem. I have added the GXX_EXPERIMENTAL_CXX0Xas well as -std=c++11to compiler options in workspace. However it did not solve my problem.
我遇到了同样的问题。我在工作区中添加了GXX_EXPERIMENTAL_CXX0X以及-std=c++11编译器选项。然而它并没有解决我的问题。
I was missing one more step:
Right-Click on Project->Properties->C/C++ Build->Settings->Cross G++ Compiler->Miscellaneous->Other flags
I changed
-c -fmessage-length=0to
-c -fmessage-length=0 -std=c++11
我又错过了一个步骤：右键单击项目-> 属性-> C/C++ 构建-> 设置-> 交叉 G++ 编译器-> 杂项-> 我更改-c -fmessage-length=0为的
其他标志
-c -fmessage-length=0 -std=c++11
Now Eclipse sees std::shared_ptr and indexes it correctly.
现在 Eclipse 看到 std::shared_ptr 并正确索引它。
回答by Sarmo Fdmusik
For me it worked by setting other dialect flags = -std=c++11under:
对我来说，它通过设置other dialect flags = -std=c++11在：
Preferences -> C++ Build -> Settings -> GCC C++ Compiler -> Dialect,
首选项 -> C++ 构建 -> 设置 -> GCC C++ 编译器 -> 方言，
as well as adding -std=c++11under:
以及在下面添加-std=c++11：
Preferences -> C++ General -> Preprocessor Include Path -> Providers -> CDT GCC Build-in Compiler Settings -> command to get compiler specs.
Preferences -> C++ General -> Preprocessor Include Path -> Providers -> CDT GCC Build-in Compiler Settings -> command to get compiler specs。
Do not forget to clean and rebuild your Project/Index.
不要忘记清理和重建您的项目/索引。
