/interpreter/tags/at2-build190607/src/edu/vub/at/objects/grammar/ATImport.java
Java | 66 lines | 8 code | 6 blank | 52 comment | 0 complexity | 84e45ed7a8357131cc7906f2032c8611 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * ATImport.java created on 6-mrt-2007 at 21:17:12 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.grammar; 29 30import edu.vub.at.exceptions.InterpreterException; 31import edu.vub.at.objects.ATTable; 32 33/** 34 * The public interface to a native AST component of the form 35 * 'import <expression> (alias (symbol := symbol)+)? (exclude symbol (, symbol)*)?' 36 * 37 * Examples: 38 * 'import o' => (import (symbol o) (table) (table)) 39 * 'import o alias foo := bar' => (import (symbol o) (table (table (symbol foo) (symbol bar))) (table)) 40 * 'import o exclude foo, bar:' => (import (symbol o) (table) (table (symbol foo) (symbol bar:))) 41 * 'import o alias a: := b, c := d: exclude e, f => 42 * (import (symbol o) (table (table (sym a:) (sym b)) (table (sym c) (sym d:))) (table (sym e) (sym f))) 43 * 44 * @author tvcutsem 45 */ 46public interface ATImport extends ATStatement { 47 48 /** 49 * Example: <code>`{ import o }.statements[1].importedObjectExpression == `o</code> 50 * @return the expression that should evaluate to the object to import. 51 */ 52 public ATExpression base_getImportedObjectExpression() throws InterpreterException; 53 54 /** 55 * Example: <code>`{ import o alias foo := bar }.statements[1].aliasedSymbols == `[[foo, bar]]</code> 56 * @return a table of pairs (tables of size two) of symbols that defines the mapping of symbols to alias. 57 */ 58 public ATTable base_getAliasedSymbols() throws InterpreterException; 59 60 /** 61 * Example: <code>`{ import o exclude a, b }.statements[1].excludedSymbols == `[a,b]</code> 62 * @return a table of symbols that represent the symbols to be excluded from the imported object. 63 */ 64 public ATTable base_getExcludedSymbols() throws InterpreterException; 65 66}