C ++ 11枚举头文件 [英] C++11 enums in a header file

问题描述

最后编辑：我是最新的人物

我抬头看看，在Qt-Creator中你必须指定你想在配置文件中包含C ++ 11 .pro文件。我这样做，一切都很好。我很抱歉，

很明显，我在Google上很糟糕，或者我错过了我非常想要的建议。

我一直在尝试在标题中放入一个范围的枚举，使其可用于我当前项目中的其他文件。

  // Drawing.h 
枚举类图{Line，Square，Triangle}; 
 
 //action.cpp 
 #includeDrawing.h
 
绘制analyzeStuff（VertexArray顶点）{
绘制theDrawing; //这可以。 
 if（...）
 theDrawing = Drawing :: Line; //这会引发错误。 
 //...其他else-ifs使用相同的东西。 
 return theDrawing; //这也没关系
} 
  

编辑：提到我在这个标题中有一个第二课很重要文件？我怀疑，但这真的是这个代码与我自己之间唯一的区别。

解决方案

不，这里没有问题。

确保你真的编译为C ++ 11，编译器支持范围枚举。

请注意，C ++不太在乎头文件。您可以将头文件内容复制并粘贴到源文件（替换 #include 指令）中，以生成工作测试用例。

FINAL EDIT: I AM THE WORST PERSON

I looked up and apparently in Qt-Creator you have to specify you want to include C++11 in the config .pro file. I did that, everything works fine. I apologize.

So clearly either I'm terrible at Googling or I'm missing the advice I so desperately want.

I've been trying to put in a scoped enum in a header to make it available to other files in my current project.

//Drawing.h
enum class Drawing {Line, Square, Triangle};

//action.cpp
#include "Drawing.h"

Drawing analyzeStuff(VertexArray vertices){
    Drawing theDrawing; //This is fine. 
    if(...)
        theDrawing = Drawing::Line; //This brings up an error.
    //...Other else-ifs using the same thing.
    return theDrawing; //This is also fine.
}

EDIT: Is it important to mention that I have a second class within this header file? I doubt it, but that's really the only variation between this code and my own.

解决方案

Nope, there's no problem here.

Make sure you're really compiling as C++11, with a compiler that has support for scoped enums.

Note that C++ doesn't really care about header files. You can literally copy-and-paste your header file contents into the source file (replacing the #include directive) to produce your working testcase.

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