/interpreter/tags/at_build150307/src/edu/vub/at/objects/ATMethod.java
http://ambienttalk.googlecode.com/ · Java · 93 lines · 11 code · 7 blank · 75 comment · 0 complexity · 40ea94e0cc0366d7bfc19670078b2261 MD5 · raw file
- /**
- * AmbientTalk/2 Project
- * ATMethod.java created on Jul 24, 2006 at 9:42:24 PM
- * (c) Programming Technology Lab, 2006 - 2007
- * Authors: Tom Van Cutsem & Stijn Mostinckx
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
- package edu.vub.at.objects;
- import edu.vub.at.exceptions.InterpreterException;
- import edu.vub.at.objects.grammar.ATBegin;
- import edu.vub.at.objects.grammar.ATSymbol;
- /**
- * ATMethods are ambienttalk's representation of methods as named functions. These
- * functions do not close over an environment allowing for them to be shared between
- * different clones. The environment is to be supplied during lookup (which wraps
- * ATMethods into ATClosures). As a consequence it is not possible to
- * get hold of an ATMethod at the base-level (since lookup implies wrapping)
- *
- * TODO: turn base_getxxx into meta_getxxx?
- *
- * @author smostinc
- * @author tvcutsem
- */
- public interface ATMethod extends ATObject {
- /**
- * Applies the method to the given arguments in the given context.
- * The context is usually supplied by a closure and is necessary in order to
- * pair a method with its current receiver (its 'self')
- *
- * The method itself is responsible for creating the appropriate 'call frame'
- * or activation record in which to define temporary variables and parameter bindings.
- *
- * @param arguments the actual arguments, already eagerly evaluated
- * @param ctx the context in which to evaluate the method body, call frame not yet inserted
- * @return the value of evaluating the method body in a context derived from the given context
- */
- public ATObject base_apply(ATTable arguments, ATContext ctx) throws InterpreterException;
-
- /**
- * Applies the method to the given arguments in the given context.
- * The context is usually supplied by a closure and is necessary in order to
- * pair a method with its current receiver (its 'self')
- *
- * The method will use the given context 'as-is', and will *not* insert an additional call frame.
- *
- * @param arguments the actual arguments, already eagerly evaluated
- * @param ctx the context in which to evaluate the method body, to be used without inserting a call frame
- * @return the value of evaluating the method body in the given context
- */
- public ATObject base_applyInScope(ATTable arguments, ATContext ctx) throws InterpreterException;
-
- /**
- * Structural access to the name of the method. Note that all methods (defined
- * using def name( ...args... ) { ... } of def foo: arg bar: arg { ... }) retain
- * the name with which they were first bound. Literal blocks which may be created
- * outside of a definition are implicitly named 'lambda'.
- */
- public ATSymbol base_getName() throws InterpreterException;
-
- /**
- * Structural access to the parameter list of the method,
- * which is normally a table of symbols.
- */
- public ATTable base_getParameters() throws InterpreterException;
-
- /**
- * Structural access to the body of the method.
- */
- public ATBegin base_getBodyExpression() throws InterpreterException;
- }