Class: Gecode::Constraints::Int::Domain::EnumDomainConstraint

Inherits:
ReifiableConstraint show all
Defined in:
lib/gecoder/interface/constraints/int/domain.rb

Overview

Enum domain constraints specify that an integer variable must be contained in an enumeration of integers. Supports reification and negation.

Examples

# +x+ must be in the enumeration [3,5,7].
x.must_be.in [3,5,7]

# +x+ must not be in the enumeration [5,6,7,17].
x.must_not_be.in [5,6,7,17]

# Specifies the above, but but reifies the constraint with the boolean 
# variable +bool+ and specified +value+ as strength.
x.must_not_be.in(-[5,6,7,17], :reify => bool, :strength => :value)

Instance Method Summary collapse

Methods inherited from ReifiableConstraint

#&, #reification_var, #reification_var=, #|

Methods inherited from Constraint

#initialize

Constructor Details

This class inherits a constructor from Gecode::Constraints::Constraint

Instance Method Details

#post ⇒ Object 



64
65
66
67
68
69
70
71
72
73
 
# File 'lib/gecoder/interface/constraints/int/domain.rb', line 64

def post
  var, domain, reif_var = @params.values_at(:lhs, :domain, :reif)
  
  (params = []) << var.bind
  params << Gecode::Constraints::Util.constant_set_to_int_set(domain)
  params << reif_var.bind if reif_var.respond_to? :bind
  params.concat propagation_options
  
  Gecode::Raw::dom(@model.active_space, *params)
end