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weight(?Set, ++ElementWeights, ?Weight)

According to the array of element weights, the weight of set Set is Weight

Set: a set, set variable or set expression
ElementWeights: an array (structure) of non-negative integers
Weight: an integer variable or integer

Description

Set is constrained to be a set of integers between 1 and the size of the array ElementWeights. Weight is an integer domain variable which is constrained to the sum of the weights of Set's elements. The weight of a set element is determined by the array element in ElementWeights whose index corresponds to the set element.

Changes to the set domain will affect the domain of Weight. There is currently no reverse propagation. This may change in a future release.