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2020-07-03Cleanup: Use trailing underscore for non-public data membersJacques Lucke
This makes the code conform better with our style guide.
2020-06-09BLI: rename ArrayRef to SpanJacques Lucke
This also renames `MutableArrayRef` to `MutableSpan`. The name "Span" works better, because `std::span` will provide similar functionality in C++20. Furthermore, a shorter, more concise name for a common data structure is nice.
2020-06-09BLI: put C++ data structures in "blender" namespace instead of "BLI"Jacques Lucke
We plan to use the "blender" namespace in other modules as well.
2020-06-08Functions: Run-time type system and index maskJacques Lucke
This adds a new `CPPType` that encapsulates information about how to handle instances of a specific data type. This is necessary for the function evaluation system, which will be used to evaluate most of the particle node trees. Furthermore, this adds an `IndexMask` class which offers a surprisingly useful abstraction over an array containing unsigned integers. It makes two assumptions about the underlying integer array: * The integers are in ascending order. * There are no duplicates. `IndexMask` will be used to "select" certain particles that will be processed in a data-oriented way. Sometimes, operations don't have to be applied to all particles, but only some, those that are in the indexed by the `IndexMask`. The two limitations imposed by an `IndexMask` allow for better performance. Reviewers: brecht Differential Revision: https://developer.blender.org/D7957