/interpreter/tags/at2-build270707/src/edu/vub/at/objects/ATContext.java
Java | 76 lines | 8 code | 9 blank | 59 comment | 0 complexity | 01ffe811dbeb69a25f693c2db05ee023 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * ATContext.java created on Jul 23, 2006 at 11:35:12 AM 4 * (c) Programming Technology Lab, 2006 - 2007 5 * Authors: Tom Van Cutsem & Stijn Mostinckx 6 * 7 * Permission is hereby granted, free of charge, to any person 8 * obtaining a copy of this software and associated documentation 9 * files (the "Software"), to deal in the Software without 10 * restriction, including without limitation the rights to use, 11 * copy, modify, merge, publish, distribute, sublicense, and/or 12 * sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following 14 * conditions: 15 * 16 * The above copyright notice and this permission notice shall be 17 * included in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 */ 28package edu.vub.at.objects; 29 30import edu.vub.at.exceptions.InterpreterException; 31 32 33/** 34 * ATContext describes a triplet of scope pointers used during evaluation, namely 35 * one for the lexical scope (where the lookup starts for receiverless messages), 36 * one for the late-bound receiver and one for the parent object. 37 * 38 * @author smostinc 39 */ 40public interface ATContext extends ATObject { 41 42 /** 43 * Returns the lexical environment of the current context. 44 * 45 * @return an {@link ATObject} representing the lexical environment of the current context. 46 */ 47 public ATObject base_lexicalScope() throws InterpreterException; 48 49 /** 50 * Returns the receiver (self pseudovariable) in the current context. 51 * 52 * @return an {@link ATObject} representing the receiver in the current context. 53 */ 54 public ATObject base_self() throws InterpreterException; 55 56 /* 57 * Factory methods for creating new context objects as a delta w.r.t. the receiver context object. 58 */ 59 60 /** 61 * Returns a new context object for a given scope. 62 * 63 * @param scope a scope. 64 * @return a new context for the given scope. 65 */ 66 public ATContext base_withLexicalEnvironment(ATObject scope) throws InterpreterException; 67 68 /** 69 * Returns a new context object for the given dynamic receiver. 70 * 71 * @param self representing the receiver (self pseudovariable). 72 * @return a new context for the given dynamic receiver. 73 */ 74 public ATContext base_withDynamicReceiver(ATObject self) throws InterpreterException; 75 76}