org.cpsolver.ifs.constant

## Interface ConstantVariable<T extends Value<?,T>>

- Type Parameters:
    `T` - Value
  All Known Implementing Classes:
    Lecture

      public interface ConstantVariable<T extends Value<?,T>>

  Extension of a variable with the possibility to have a constant value. Such variables are excluded from the solver process, however, they can be included in constraints.
  Version:
    IFS 1.3 (Iterative Forward Search)
    Copyright (C) 2006 - 2014 Tomáš Müller
    muller@unitime.org
    http://muller.unitime.org
    This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
    This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    You should have received a copy of the GNU Lesser General Public License along with this library; if not see http://www.gnu.org/licenses.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `T` | `getConstantValue()` Return assignment if constant
    `boolean` | `isConstant()` True, if the variable is constant.

- - ### Method Detail

    - #### isConstant

          boolean isConstant()

      True, if the variable is constant.
      Returns:
        true if constant

    - #### getConstantValue

          T getConstantValue()

      Return assignment if constant
      Returns:
        constant value (if `isConstant()` is true)