了解VisualStudio 2010中的Watch窗口 [英] Understanding Watch window in VisualStudio 2010

问题描述

我不明白方括号内的对象部分是什么意思（[bsm :: Material]见下图）。我希望类型MaterialLayer的对象ml只能由Object（基类）+两个字段的厚度和材质（指向Material）的一部分组成。

I cannot understand what the part of the object within square bracket means ( [bsm::Material] see pic below ). I would expect the object ml of type MaterialLayer to be composed only of a part of type Object (base class) + two fields thickness and material (a pointer to Material).

那么，Visual Studio 2010在其监视窗口中显示的方括号之间的部分是什么？

So, what is the part between square brackets, shown by Visual Studio 2010 in its Watch window?

以下是Material，Object和MaterialLayer类的定义：

Here is the definition of the Material, Object, and MaterialLayer classes:

class Object
{

public:
    // Methods
};


class Material : public Object
{
    int type;
    std::string name;
    std::vector<Property *> properties;

public:
    // Methods
};


class MaterialLayer : public Object
{
    double thickness;
    Material * material;

public:
    // Methods
};

推荐答案

看起来像 ml 被声明为 bsm :: MaterialLayer * ，但是类型为 bsm :: Material * 通过类型转换分配给它：

It looks like ml is declared as bsm::MaterialLayer*, but a pointer of type bsm::Material* was assigned to it by typecasting:

bsm::MaterialLayer *ml;
bsm::Material *foo;
ml = (bsm::MaterialLayer *)foo;

这不会在编译时产生类型转换错误，但几乎肯定会导致错误，如废话值在厚度和材料。

This does not generate a typecast error in compile-time but will almost certainly lead to errors like nonsense values in thickness and material.

然而，由于他们两人分享一个共同的父母，Watch在方括号中显示其真正的孩子。

However, since they both share a common parent, Watch shows its real child in square brackets.

这篇关于了解VisualStudio 2010中的Watch窗口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！