So this probably has been done, but I'm wondering if there was a better way to do this. I wrote a global templated function that allows you to use it as the pointing function for any class's constructor reference. Looking at the stringD code I saw there are 2 ways to go about doing this: Usinging asIScriptGeneric, and Calling it natively using a typed member object pointer. 

Below is some code that does both based on the as_max_portiblity preprocessor define that I created (i assume there is one natively in the engine but I didn't see it):

asERRORCHECK(r) assert(r < 0) //I have a much more complex error message system, so this is just to cover for that

#define as_max_portiblity 0
#if as_max_portiblity
template<class C, typename ...Args> void __constructor__(asIScriptGeneric *gen)
{
	int i = 0, max = sizeof ...(Args);
	new (gen->GetObject()) C(*static_cast<Args *>(gen->GetAddressOfArg(*std::make_unique<int>((max-(++i)))))...);
}
#else
template<class C, typename ...Args> void __constructor__(C *gen, Args... args)
{

	new (gen) C(Args(args)...);
}
#endif

Once you have defined the type of function you want to use then you need to register this inside of a function like this:

void registermyobjects(asIScriptEngine *asEngine)
{
int r;
...
//we have an object registered under the name vec2
...
#if as_max_portiblity
	r = asEngine->RegisterObjectBehaviour("vec2", asBEHAVE_CONSTRUCT, "void f()", asFUNCTION(__constructor__<vec2>), asCALL_GENERIC); asERRORCHECK(r);
	r = asEngine->RegisterObjectBehaviour("vec2", asBEHAVE_CONSTRUCT, "void f(float, float)", asFUNCTION((__constructor__<vec2, float, float>)), asCALL_GENERIC); asERRORCHECK(r);
#else
	r = asEngine->RegisterObjectBehaviour("vec2", asBEHAVE_CONSTRUCT, "void f()", asFUNCTIONPR((__constructor__<vec2>), (vec2 *), void), asCALL_CDECL_OBJFIRST); asERRORCHECK(r);
	r = asEngine->RegisterObjectBehaviour("vec2", asBEHAVE_CONSTRUCT, "void f(float, float)", asFUNCTIONPR((__constructor__<vec2, float,float>),(vec2 *,float, float), void), asCALL_CDECL_OBJFIRST); asERRORCHECK(r);
#endif
...
}

This should be fairly self explanatory but i have a class vec2 which can take either (void) or (float,float) as its constructor types. So this should in theory be able to take anytype and pass it into the __constructor__() and it will create an object for you. Let me know what you think.

Im curious if anyone has done something like this, or if any one sees a potential problem with this code. In theory I could do the same thing for operator types and maybe even factory functions.

chasester

@edit 1: Made a mistake where the new int(++i) was passing maxargs ... 0 rather than 0 .... maxargs. Fixed by reversing the numbers with a formula (((++i) - maxargs)*-1).

@edit 2: Made max - (++i) so that we dont have to multiply by -1. Also replace *new int() with *std::make_unique<int>() so that we dont run into a memory leak.

well i found a few improvements when talking to my brother which i will update but i was concerned with:

(*new int(max - (i++)))

creating a  memory leak so im looking into using an auto_pointer to fix this issue. Ill look at the auto wrapper. I haven't looked at much of the add on code, most of it looks very tedious so i was trying to find a more portable solution since i have a lare number of classes I want to add to the library.

Also i've not seen a good geom libray written in the addon (like vec, matrix etc) is there one? I feel like every time I look there are more add-ons which i've never seen for some reason (im probably just blind).

I appreciate your quick response as always

chasester

@edit

I dont really understand what this header does, maybe seeing a short example would help, but it looks very confusing for what I'm presuming is something very simple. A lot of copy and pasted code with very little changes. Or maybe this is just way over my head.

@Geom library.

I have a library already. I was wondering if you want a version of it with it added as a script object in angelscript. 

@Wrapper

I was more asking what exactly would you want in the wrapper. I have macros for globalFunctions globalVaribles, objectMethods, objectProperties, asFuncitonto/C++Template, Operators, etc If you give me some build specs I can make something since im already doing something very simpler.

@Generic

How useful is generic, is it something that people have to use often. I mostly ask for my person project, I want to know if I should always include a generic form for all of the defined functions?

@Inline Definitions

Technically there is a way of defining global functions and varibles out side of a function (I assume im using the wrong name for this) using a macro. 

#define asCOMMAND(ret, name, prefab) static bool __DUMMY__##ret##name = \
  addcommand(str( str(#ret) + str(#name) + str(#prefab)), asFUNCTIONPR(ret, name, prefab));

void addcommand(str def, void *(f)(void)); 
//This would basically store the definition and the string name so that after all of the objects
//have been defined by script##name##.h it would run adding all of the underlying globals.

int hello(int a) {cout << "hello: " << a;} asCOMMAND(int, hello, (int));

Basically the goal would be to make it easier to define things in angel script by letting you define them inline where the function definition is and then have them automatically added later.

chasester