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[英]How to document a struct within a struct in XCode (Swift or Obj-C)
[英]C struct representation in Swift
用 C 語言思考:我有包含數百萬個Object
結構的內存緩沖區(平面 3D),我想重新計算鄰居:
typedef struct Object {
vector_int3 coords;
struct Object *neighbours[6]; // Neighbouring objects in 6 directions
int prop1;
} Object;
能夠稍后訪問例如chunk->neighbours[TOP]->prop1;
我試圖用 Swift 實現同樣的事情,我試過:
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 中擁有 6 個指向Object
指針的緩沖區,以便能夠通過索引訪問它。 提到的 C 結構最接近的 Swift 實現是什么? 不,這不是過早的優化。
相當於 C 結構的看起來像
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。
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