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A special sentinel type and singular value that can be used to "finalize" a composing type. More...
#include <valueComposeOver.h>
A special sentinel type and singular value that can be used to "finalize" a composing type.
For example, VtArrayEdit<T> can compose over VtBackground. It does so by applying its edits to an empty VtArray<T> to produce a final array. Using a single-typed sentinel lets type-agnostic code "finalize" composing values uniformly. The name "background" is by analogy to image compositing.
Definition at line 59 of file valueComposeOver.h.