索引到在C＃中的任意级别的阵列 [英] Indexing into arrays of arbitrary rank in C#

问题描述

我需要遍历任意秩的数组。这是阅读和写作两个，所以的GetEnumerator 将无法工作。

I need to iterate over an array of arbitrary rank. This is for both reading and writing, so GetEnumerator will not work.

Array.SetValue（对象，INT）不多维数组。
Array.SetValue（对象，则params INT []）将需要通过多维空间进行迭代运算过多。这还需要动态调用，以绕过 PARAMS签名部分。

Array.SetValue(object, int) doesn't work on multidimensional arrays. Array.SetValue(object, params int[]) would require excessive arithmetic for iterating through the multidimensional space. It would also require dynamic invocation to get around the params part of the signature.

我很想针阵列并遍历它的指针，但我找不到，指出多维数组保证是连续的任何文件。如果他们在一个维度到底有填充那么将无法工作。我也preFER避免不安全code。

I'm tempted to pin the array and iterate over it with a pointer, but I can't find any documentation that says that multidimensional arrays are guaranteed to be contiguous. If they have padding at the end of a dimension then that won't work. I'd also prefer to avoid unsafe code.

有没有一种简单的方法只使用一个索引顺序地址多维数组？

Is there an easy way to sequentially address a multidimensional array using only a single index?

推荐答案

多维数组保证是连续的。从ECMA-335：

Multidimensional arrays are guaranteed to be contiguous. From ECMA-335:

数组元素应在数组对象中的行主顺序（从最低到最高指数即最右边的数组维的关联的元素应奠定了连续）布局。

Array elements shall be laid out within the array object in row-major order (i.e., the elements associated with the rightmost array dimension shall be laid out contiguously from lowest to highest index).

所以这个作品：

int[,,,] array = new int[10, 10, 10, 10];

fixed (int* ptr = array)
{
    ptr[10] = 42;
}

int result = array[0, 0, 1, 0];  // == 42

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