dmcallis
65a0592776
Source code drop for the Actionscript virtual machine in the Adobe Flash Player for December 2013
93 lines
3.5 KiB
ActionScript
93 lines
3.5 KiB
ActionScript
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package
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{
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//pseudo-final - no user class can extend Function
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[native(cls="FunctionClass", gc="exact", instance="FunctionObject", methods="auto", construct="instance")]
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dynamic public class Function
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{
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// Function.length = 1 per ES3
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// E262 {ReadOnly, DontDelete, DontEnum }
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public static const length:int = 1
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// E262 {DontDelete}
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// JS {DontEnum,DontDelete}
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public native function get prototype()
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public native function set prototype(p)
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// E262 {DontEnum, DontDelete, ReadOnly}
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public native function get length():int
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// called by native code to create empty functions used for
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// prototype and no-arg constructor.
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[API(CONFIG::VM_INTERNAL)]
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[cppcall]
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public static function createEmptyFunction():Function
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{
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return function() {}
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}
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/* cn: Spidermonkey returns the actual source text of the function here. The ES3
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// standard only says:
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15.3.4.2 Function.prototype.toString ( )
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An implementation-dependent representation of the function is returned. This
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representation has the syntax of a FunctionDeclaration. Note in particular
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that the use and placement of white space, line terminators, and semicolons
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within the representation string is implementation-dependent.
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The toString function is not generic; it throws a TypeError exception if its this value is not a Function object.
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Therefore, it cannot be transferred to other kinds of objects for use as a method.
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//
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// We don't have the source text, so this impl follows the letter if not the intent
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// of the spec.
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//
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// Note: we only honor the compact ES3/4 spec, which means
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// we don't support new Function(stringArg) where stringArg is the text of
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// the function to be compiled at runtime. Returning the true text of the
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// function in toString() seems to be a bookend to this feature to me, and
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// thus shouldn't be in the compact specification either. */
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prototype.toLocaleString =
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prototype.toString = function():String
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{
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var f:Function = this
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return "function Function() {}"
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}
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AS3 native function call(thisArg=void 0, ...args)
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prototype.call = function(thisArg=void 0, ...args)
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{
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var f:Function = this
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return f.AS3::apply(thisArg, args)
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}
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AS3 native function apply(thisArg=void 0, argArray=void 0)
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prototype.apply = function(thisArg=void 0, argArray=void 0)
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{
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var f:Function = this
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return f.AS3::apply(thisArg, argArray)
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}
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_dontEnumPrototype(prototype);
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}
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}
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// not dynamic
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[native(cls="MethodClosureClass", gc="exact", instance="MethodClosure", methods="auto", construct="instance")]
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final class MethodClosure extends Function
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{
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override public function get prototype()
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{
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return null
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}
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override public function set prototype(p)
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{
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Error.throwError( ReferenceError, 1074 /*kConstWriteError*/, "prototype", "MethodClosure" );
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}
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}
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