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#(?SetExpression, ?Cardinality)

Cardinality of a set expression
SetExpression
A Set expression.
Cardinality
An integer or an FD variable.

Description

Cardinality is the cardinality of SetExpression, a set term possibly including set operators `/\, `\/ and `\ (or \).

SetExpression is first evaluated into a ground set or a set variable and then its Cardinality is applied as in cardinality/2.

Fail Conditions

Fails if Cardinality can not be the cardinality of SetExpression.

Resatisfiable

No.

Examples

?- S `::[]..[a,b], #(S,C).
?- S `::[]..[a,b], #(S `/\ [b,c],1).
?- S `::[]..[a,b], #([b,c] `\/ S `\ [a,z] `/\ [g], C).
C = 2,
?- S `::[]..[a,b], #(([b,c] `\/ S `\ [a,z]) `/\ [g], C).
C = 0
?- S1 `::[]..[a,b], S2 `::[]..[b,c,d], #(S1 `/\ S2, 2).
no

See Also

cardinality / 2, `= / 2