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# #::(?Vars, ?Range, ?Bool)

Reified range constraint combined with integrality constraint
*Vars*
- Variable or integer, or a list of variables or integers
*Range*
- Variable or Lo..Hi, where Lo and Hi are variables or integer expressions
*Bool*
- Variable, 0 or 1

## Description

Reified version of #::/2, i.e. the truth value of the range constraint is
reflected in the value of the 0/1 variable Bool.
This constraint suspends until its first two arguments are ground.
It then unifies Bool according to the truth value of the corresponding
#::/2 constraint.

Note: as opposed to #::/2, the first argument cannot be a list.

### Modules

This predicate is sensitive to its module context (tool predicate, see @/2).
### Exceptions

*(5) type error *
- Range contains non-integers.

## Examples

?- #::(X, 1 .. 5, B), X = 3.
B = 1
X = 3
Yes (0.00s cpu)
% range violated
?- #::(X, 1 .. 5, B), X = 6.
B = 0
X = 6
Yes (0.00s cpu)
% integrality violated
?- #::(X, 1 .. 5, B), X = 3.0.
B = 0
X = 3.0
Yes (0.00s cpu)

## See Also

#:: / 2