content: /* 
   * Kodkod -- Copyright (c) 2005-present, Emina Torlak
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  package kodkod.ast;
  
  
  import kodkod.ast.visitor.ReturnVisitor;
  import kodkod.ast.visitor.VoidVisitor;
  
  /**
   * An integer constant (literal).
   * @specfield value: int
   * @invariant no children
   * @author Emina Torlak
   */
  public final class IntConstant extends IntExpression {
  	private final int value;
  	
  	/**
  	 * Constructs an int constant.
  	 * @ensures this.value' = value 
  	 */
  	private IntConstant(int value) {
  		this.value = value;
  	}
  
  	/**
  	 * Returns an IntConstant corresponding to the given value.
  	 * @return {c: IntConstant | c.value = value}
  	 */
  	public static IntConstant constant(int value) {
  		return new IntConstant(value);
  	}
  	
  	/**
  	 * Returns this.value.
  	 * @return this.value
  	 */
  	public int value() {
  		return value;
  	}
  	
  	/**
  	 * Return true if o is an IntConstant with the same value as this.
  	 * @return o in IntConstant && o.value = this.value
  	 */
  	public boolean equals(Object o) {
  		if (o==this) 
  			return true;
  		else if (o instanceof IntConstant) 
  			return value==((IntConstant) o).value;
  		else 
  			return false;
  	}
  	
  	/**
  	 * Return this.value
  	 * @return this.value
  	 */
  	public int hashCode() { 
  		return value;
  	}
  	
  	/**
  	 * {@inheritDoc}
  	 * @see kodkod.ast.IntExpression#accept(kodkod.ast.visitor.ReturnVisitor)
  	 */
  	@Override
  	public <E, F, D, I> I accept(ReturnVisitor<E, F, D, I> visitor) {
  		return visitor.visit(this);
  	}
  
  	/**
  	 * {@inheritDoc}
  	 * @see kodkod.ast.IntExpression#accept(kodkod.ast.visitor.VoidVisitor)
  	 */
  	@Override
  	public void accept(VoidVisitor visitor) {
  		visitor.visit(this);
  	}
  	
  	/**
  	 * {@inheritDoc}
  	 * @see kodkod.ast.Node#toString()
  	 */
  	public String toString() {
  		return String.valueOf(value);
  	}
  	
  }
  