[ library(fd_sets) | The ECLiPSe Libraries | Reference Manual | Alphabetic Index ]

# 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.