/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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.jetbrains.annotations;

import java.lang.annotation.*;

/**
 * Specifies some aspects of the method behavior depending on the arguments. Can be used by tools for advanced data flow analysis.
 * Note that this annotation just describes how the code works and doesn't add any functionality by means of code generation.<p>
 * 
 * Method contract has the following syntax:<br/>
 *  contract ::= (clause ';')* clause<br/>
 *  clause ::= args '->' effect<br/>
 *  args ::= ((arg ',')* arg )?<br/>
 *  arg ::= value-constraint<br/>
 *  value-constraint ::= 'any' | 'null' | '!null' | 'false' | 'true'<br/>
 *  effect ::= value-constraint | 'fail' <p/>
 *  
 * The constraints denote the following:<br/>
 * <ul>
 * <li> _ - any value
 * <li> null - null value
 * <li> !null - a value statically proved to be not-null
 * <li> true - true boolean value
 * <li> false - false boolean value
 * <li> fail - the method throws an exception, if the arguments satisfy argument constraints
 * </ul>
 * Examples:<p/>
 * <code>@Contract("_, null -> null")</code> - method returns null if its second argument is null<br/>
 * <code>@Contract("_, null -> null; _, !null -> !null")</code> - method returns null if its second argument is null and not-null otherwise<br/>
 * <code>@Contract("true -> fail")</code> - a typical assertFalse method which throws an exception if <code>true</code> is passed to it<br/> 
 * 
 * @author peter
 */
@Documented
@Retention(RetentionPolicy.CLASS)
@Target(ElementType.METHOD)
public @interface Contract {
  String value();
}

@@ -2002,29 +2002,12 @@
  * %0A
- * @author peter%0A
  */%0A
+
 @Doc
@@ -2111,22 +2111,413 @@
 %7B%0A  
-String value()
+/**%0A   * Contains the contract clauses describing causal relations between call arguments and the returned value %0A   */%0A  String value() default %22%22;%0A%0A  /**%0A   * Specifies if this method is pure, i.e. has no visible side effects. This may be used for more precise data flow analysis, and %0A   * to check that the method's return value is actually used in the call place.%0A   */%0A  boolean pure() default false
 ;%0A%7D%0A

add "pure" attribute to @Contract (IDEA-107864)