Subj : Re: spidermonkey - wrapper code generator
To   : netscape.public.mozilla.jseng
From : Jens Thiele <karme@unforgettable.com>
Date : Fri Mar 26 2004 01:31 pm

> Well, personally, I'd recommend jsgen. ;)
> 
> If you have well-formed C++ classes, it works rather effectively.  In my
> case, if I have any problems or need any changes, I just pop into the
> source and fix 'em up.  I would suggest checking out the
> source/generated source to see if it suits your tastes.
> 
> Marcello

the test app is crashing
../test test.js

using debian package of spidermonkey - 1.5rc6-1

debug info:

GNU gdb 5.3-debian
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...
Vector2dChild(0xbffff5d4)
JSTest()=0xbffff5b0
Vector2dChild(0xbffff594)
JSTest()=0xbffff570
JSTestChild(0xbffff570)
Vector2dChild(0xbffff554)
JSTest()=0xbffff530
JSTestChild(0xbffff530)
JSTestChild2(0xbffff530)
Vector2dChild(0x8062444)
JSTest(0, argv)=0x8062420
Vector2dChild(0x80624a4)
JSTest(2)=0x8062480
Vector2dChild(0x806d85c)
JSTest(3, argv)=0x806d838
yo

yo

JSTest::test1()
test1=undefined
JSTest::test2()
test2=2
JSTest::test4(1,2)
test4=undefined
JSTest::test5(1,2,3)
test5=5

JSTest::test6(1) type is int!
test6=1
JSTest::test6(1) type is int!
test6=1
JSTest::test6(1.2) type is double!
test6=1.2
JSTest::test6(1) type is boolean!
test6=true
JSTest::test6(0) type is boolean!
test6=false
JSTest::test6(hello) type is string!
test6=hello
JSTest::test6(?) type is something else!
test6=[object JSTest]
JSTest::test6(?) type is something else!
test6=
function f() {
    return 1;
}

JSTest::test6(null) type is null!
test6=null

JSTest::test8(3)
test8=undefined
JSTest::test8(4)
test8=undefined

test=[object JSTest]
[object JSTest]
[object Vector2d]
new v=0,0
new v=2,3
v=2,3
t.pos=0,4.484155085839415e-44
v=3,4
t.pos=0,4.484155085839415e-44
v=4,5
t.pos=0,4.484155085839415e-44
Objects can be passed into a function by reference:
JSTest::test8(Vector2d(100,100))
JSTest::test8(Vector2d(100,100))
Classes can be inspected:
   JSTest['TEST']=4
   JSTest['TEST2']=5
   JSTest['TEST3']=6
   JSTest['visible']=false

Static variables can be retrieved:
   test.visible=false
   test.TEST=4
   test.TEST2=5
   test.TEST3=6
And modified:
   test.visible=false
   test2.visible=false
   test.visible=true
   test2.visible=true

Static variables can be retrieved by their classname:
   JSTest.visible=true
   JSTest.TEST=4
   JSTest.TEST2=5
   JSTest.TEST3=6

Static functions can be called on the class name or an instance:
JSTest::test3(1)
   JSTest.test3(1)=undefined
JSTest::test3(1)
   test.test3(1)=undefined

Subclasses are also supported:
   Making a JSTestChild
Vector2dChild(0x806adcc)
JSTest()=0x806ada8
JSTestChild(2)=0x806ada8
   running an overridden function from the child class:
JSTestChild::test1()
   running a function from the parent class:
JSTest::test3(1)
t.child.prototype=undefined
t=[object JSTest]
test=[object JSTest]
test2=[object JSTestChild]
JSTestChild=
function JSTestChild() {
    [native code]
}

Vector2dChild(0x807067c)
JSTest(0, argv)=0x8070658
new JSTest=[object JSTest]
Vector2dChild(0x8070754)
JSTest()=0x8070730
JSTestChild(1)=0x8070730
new JSTestChild(1)=[object JSTestChild]
Vector2dChild(0x80708c0)
new Vector2dChild=[object Vector2dChild]
t.child=[object Vector2dChild]

JSExec result
-------------
undefined
~JSTestChild2(0xbffff530)
[New Thread 16384 (LWP 20365)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 20365)]
0x4006f335 in js_SetSlotThreadSafe () from /usr/lib/libsmjs.so.1
$1 = "--- Stack: ---"
#0  0x4006f335 in js_SetSlotThreadSafe () from /usr/lib/libsmjs.so.1
#1  0x4003c05f in JS_SetPrivate () from /usr/lib/libsmjs.so.1
#2  0x0804d47d in ~_JSinternalStruct (this=0xbffff56c) at
JSTestChild2JS.h:43
#3  0x0804d0f0 in ~JSTestChild2 (this=0xbffff530) at
example/JSTestChild2.cpp:11
#4  0x08049d11 in main (argc=2, argv=0xbffffb84) at example/test.cpp:119
#1  0x4003c05f in JS_SetPrivate () from /usr/lib/libsmjs.so.1
#2  0x0804d47d in ~_JSinternalStruct (this=0xbffff56c) at
JSTestChild2JS.h:43
43		~_JSinternalStruct() { if (o) JS_SetPrivate(NULL,o, NULL); };
$2 = "----- The source: ----"
38	
39	///// JavaScript Object Linking
40	struct _JSinternalStruct {
41		JSObject *o;
42		_JSinternalStruct() : o(NULL) {};
43		~_JSinternalStruct() { if (o) JS_SetPrivate(NULL,o, NULL); };
44	};
45	_JSinternalStruct _JSinternal;
46	JSObject *getJSObject(JSContext *cx);
47	static JSObject *newJSObject(JSContext *cx);
$3 = "---- o: ---- "
$4 = (JSObject *) 0x8059e70
#3  0x0804d0f0 in ~JSTestChild2 (this=0xbffff530) at
example/JSTestChild2.cpp:11
11		cout << "~JSTestChild2(" << this << ")" << endl;
6	
7	JSTestChild2::JSTestChild2() : JSTestChild() {
8		cout << "JSTestChild2(" << this << ")" << endl;
9	}
10	JSTestChild2::~JSTestChild2() {
11		cout << "~JSTestChild2(" << this << ")" << endl;
12	}
13	JSTestChild2::JSTestChild2(int i) {
14		cout << "JSTestChild2(" << i << ")=" << this << endl;
15	}

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