C++WinRT中的.Net Double.PositiveInfinity等价物是什么？

Question

If at all there is. And if not, what should be passed to functions like

var tb = new TextBlock { Text = "Text", FontSize = 10 };
tb.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));

Answer 1

The purpose of the C++/WinRT projection is to let you use Windows Runtime APIs from 'Standard C++'. Always start with who the C++17 Standard would have you do it.

#include <cmath>

// std::numeric_limits<float>::infinity();
// std::numeric_limits<double>::infinity();

See cppreference

There is a drop-list on many Microsoft Doc pages which let you set the examples to C++/WinRT instead of C#: