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vtk-m/docs/changelog/vtkm-vec-operator-constexpr.md
Robert Maynard a529b90c73 vtkm::Vec const& operator[] is now constexpr 
This allows for developers to do things such as the following
as constexpr's:
```cxx
constexpr vtkm::Id2 dims(16,16);
constexpr vtkm::Float64 dx = vtkm::Float64(4.0 * vtkm::Pi()) / vtkm::Float64(dims[0] - 1);
```
2019-08-22 08:34:25 -04:00

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vtkm::Vec const& operator[] is now constexpr

This was done to allow for developers to write normal operations on vtkm::Vec but have the resolved at compile time, allowing for both readible code and no runtime cost.

Now you can do things such as:

  constexpr vtkm::Id2 dims(16,16);
  constexpr vtkm::Float64 dx = vtkm::Float64(4.0 * vtkm::Pi()) / vtkm::Float64(dims[0] - 1);