/*
 *  JavaSMT is an API wrapper for a collection of SMT solvers.
 *  This file is part of JavaSMT.
 *
 *  Copyright (C) 2007-2016  Dirk Beyer
 *  All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.sosy_lab.java_smt.api;

/** An arbitrary SMT formula. */
public interface Formula {}

@@ -126,9 +126,9 @@
 -201
-6
+8
   Di
@@ -772,65 +772,1114 @@
 i;%0A%0A
-/** An arbitrary SMT formula. */%0Apublic interface Formula %7B
+import org.sosy_lab.java_smt.api.visitors.FormulaVisitor;%0A%0A/** An arbitrary SMT formula. */%0Apublic interface Formula %7B%0A%0A  /**%0A   * returns an arbitrary representation of the formula, might be human- or machine-readable.%0A   *%0A   * %3Cp%3EWe do not guarantee that the returned String is in any way related to the formula. The%0A   * solver might apply escaping or even un-escaping. A user should not use the returned String for%0A   * further processing. For analyzing formulas, we recommend to use a %7B@link FormulaVisitor%7D.%0A   */%0A  @Override%0A  String toString();%0A%0A  /**%0A   * checks whether the other object is a formula of the same structure. Does not apply an expensive%0A   * SAT-check to check equisatisfiability.%0A   *%0A   * %3Cp%3ETwo formulas that are structured in the same way, are determined as %22equal%22. Due to%0A   * transformations and simplifications, two equisatisfiable formulas with different structure%0A   * might not be determined as %22equal%22.%0A   */%0A  @Override%0A  boolean equals(Object other);%0A%0A  /** returns a valid hashCode satisfying the constraints given by %7B@link #equals%7D. */%0A  @Override%0A  int hashCode();%0A
 %7D%0A

add some documentation on Formula-interface.