Class: Gecode::Constraints::SetEnum::Channel::IntChannelConstraint

Inherits:
Constraint
  • Object
show all
Defined in:
lib/gecoder/interface/constraints/set_enum/channel.rb

Overview

Describes a channel constraint which “channels” one enumeration of integer variables with one enumeration of set variables. The i:th set in the enumeration of set variables is constrainde to includes the value of the j:th integer variable.

Neither reification nor negation is supported.

Examples

# +set_enum+ is constrained to channel +int_enum+.
int_enum.must.channel set_enum

# This is another way of saying the above.
set_enum.must.channel int_enum

Instance Method Summary collapse

Methods inherited from Constraint

#initialize

Constructor Details

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

Instance Method Details

#post ⇒ Object 



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# File 'lib/gecoder/interface/constraints/set_enum/channel.rb', line 42

def post
  lhs, rhs = @params.values_at(:lhs, :rhs)
  Gecode::Raw::channel(@model.active_space, rhs.to_int_var_array, 
    lhs.to_set_var_array)
end