[英]How to document a struct within a struct in XCode (Swift or Obj-C)
[英]C struct representation in Swift
用 C 语言思考:我有包含数百万个Object
结构的内存缓冲区(平面 3D),我想重新计算邻居:
typedef struct Object {
vector_int3 coords;
struct Object *neighbours[6]; // Neighbouring objects in 6 directions
int prop1;
} Object;
能够稍后访问例如chunk->neighbours[TOP]->prop1;
我试图用 Swift 实现同样的事情,我试过:
struct Object {
var coords: vector_int3
// IMO this is wrong, because it allocates new heap buffer for 6 pointers
var neighbours = UnsafeMutablePointer<Chunk>.allocate(capacity: 6)
var prop1: Int
...
}
我只想在 Swift 中拥有 6 个指向Object
指针的缓冲区,以便能够通过索引访问它。 提到的 C 结构最接近的 Swift 实现是什么? 不,这不是过早的优化。
相当于 C 结构的看起来像
struct Object {
var coords: vector_int3
var neighbours: (UnsafeMutablePointer<Chunk>, UnsafeMutablePointer<Chunk>, UnsafeMutablePointer<Chunk>, UnsafeMutablePointer<Chunk>, UnsafeMutablePointer<Chunk>, UnsafeMutablePointer<Chunk>)
var prop1: Int
...
}
是的,它非常笨拙。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.