是否有可能reinter preT指针作为标注尺寸数组引用? [英] Is it possible to reinterpret pointer as dimensioned array reference?
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问题描述
假设我有一些指针,这是我想reinter preT静态二维数组引用:
Suppose I have some pointer, which I want to reinterpret as static dimension array reference:
double *p;
double (&r)[4] = ?(p); // some construct?
// clarify
template< size_t N> void function(double (&a)[N]);
...
double *p;
function(p); // this will not work.
// I would like to cast p as to make it appear as double[N]
是否可以这样做呢?
我该怎么办呢?
Is it possible to do so? how do I do it?
推荐答案
这是丑陋的:
double arr[4];
double* d = arr;
double (&a)[4] = *static_cast<double(*)[4]>(static_cast<void*>(d));
请务必数组类型相匹配什么指针最初是从哪里来的。
Be sure the array type matches what the pointer originally came from.
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