.net - C++/CLI 引用变量

Question

void f(cli::array<PointF> ^points){
    PointF& a = points[0];
    // and so on...
}

第 2 行出现编译错误。

.\ndPanel.cpp(52) : error C2440: 'initializing' : cannot convert from 'System::Drawing::PointF' to 'System::Drawing::PointF &'
        An object from the gc heap (element of a managed array) cannot be converted to a native reference

声明引用变量的托管方式是什么？

Answer 1

如果您只想声明对数组中第一个 PointF 的引用，那么您需要使用 tracking reference (%):

void f(cli::array<PointF>^ points)
{    
    PointF% a = points[0];
}