[ library(gfd) | Reference Manual | Alphabetic Index ]

<ConsistencyModule:> all_ne(?Collection,?Y)

Constrains Collection to be not equal to Y.
Collection
Collection of integers or (domain) variables
Y
An integer or (domain) variable (array notation accepted)

Description

Constrains every element in Collection to be greater than or equal to Y. ConsistencyModule is the optional module specification to give the consistency level for the propagation for this constraint: gfd_bc for bounds consistency, and gfd_gac for domain (generalised arc) consistency.

This constraint is known as arith (with the not equal to relation) in the Global Constraint Catalog, and is implemented using Gecode's rel() constraint.

Examples

[eclipse 45]:  X :: 1..10, all_ne([1,3,4,5], X).

X = X{[2, 6 .. 10]}

[eclipse 46]: all_ne([1,3,4,5], 2).       % succeed

[eclipse 47]: all_ne([1,3,4,5], 4).       % fail

See Also

#=< / 2, all_le / 2, all_gt / 2, all_ge / 2, all_lt / 2, all_eq / 2