package org.matheclipse.core.interfaces;

/**
 * Interface for pattern sequence objects. A pettern sequence object cannot be
 * shared between multiple rules.
 * 
 */
public interface IPatternSequence extends IPatternObject, IExpr {

	/**
	 * Get the additional pattern sequences condition expression
	 * 
	 * @return may return null;
	 */
	public IExpr getCondition();

	/**
	 * Return true, if all of the elements in the
	 * sequence fulfill the pattern sequences additional condition
	 * 
	 * @param sequence
	 * @return
	 */
	public boolean isConditionMatchedSequence(IAST sequence);

	/**
	 * Return true, if the expression is a blank sequence pattern
	 * 
	 * @return
	 */
	public boolean isBlank();

	/**
	 * Return true, if the expression is a pattern sequence with an
	 * associated default value,
	 * 
	 * @return
	 */
	public boolean isDefault();
}