[ library(COLIBRI_DOC) | ]

X and Y

X is true and Y is true.
X
A "boolean" integer term (range 0..1).
Y
A "boolean" integer term (range 0..1).

Description

This constraints exists also in a reified form, (X and Y) #= Bool, where Bool is an int variable ranging in 0..1.

Fail Conditions

Fails if the domains of the two terms cannot satisfy the logical operator.

Resatisfiable

no

Examples

Success:
    int_vars(int,[X,Y]), X and Y.
    (gives X = 1, Y = 1)

    int_vars(int,[X,Y,B]), X and Y #= B, X #\= B.
    (gives X = 1, Y = 0, B = 0)

Fail:
    int_vars(int,[X,Y,B]), X and Y #= B, X #= Y, X #\= B.

See Also

neg / 1, or / 2, xor / 2, => / 2, ite / 3