我很确定这是可能的,因为我确定我已经看到了它。我认为这是真棒,但我会很乐意接受这是一个可怕的想法,因为____的答案。
I'm pretty sure this is possible, because I'm pretty sure I've seen it done. I think it is awesome, but I will gladly accept answers along the lines of "this is a terrible idea because ____".
假设我们有一个基本的结构。 p>
Say we have a basic struct.
struct vertex { float x, y, z; };现在,我想对这些变量实现别名。
Now, I want to implement aliases on these variables.
vertex pos; vertex col; vertex arr; pos.x = 0.0f; pos.y = 0.5f; pos.z = 1.0f; col.r = 0.0f; col.g = 0.5f; col.b = 1.0f; arr[0] = 0.0f; arr[1] = 0.5f; arr[2] = 1.0f;理想情况下,第三种语法与数组不可区分。也就是说,如果我发送 arr 作为参数参数到一个函数,期望一个浮点数组,它将存储数据(例如许多OpenGL glGet 函数),它会工作得很好。
Ideally the third syntax would be indistinguishable from an array. That is, if I sent arr as a reference parameter to a function expecting an array of floats into which it will store data (eg many of the OpenGL glGet functions), it would work fine.
你觉得怎么样?可能?
What do you think? Possible? Possible but stupid?
推荐答案我会做的是让访问者:
struct Vertex { float& r() { return values[0]; } float& g() { return values[1]; } float& b() { return values[2]; } float& x() { return values[0]; } float& y() { return values[1]; } float& z() { return values[2]; } float operator [] (unsigned i) const { return this->values_[i]; } float& operator [] (unsigned i) { return this->values_[i]; } operator float*() const { return this->values_; } private: float[3] values_; }更多推荐
C ++成员变量别名?
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