RE: using Lua and toLua

["Peter Prade" <prade@...>]

A typical pkg file in our project looks like this:

--- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< ---
// include another package file which declares some basic types
$<Typedef.pkg>

// specify headerfiles that are needed for the cpp that tolua will produce
// (tolua reproduces these lines 1:1)
$#include "Math.hpp"
$#include "Terrain.hpp"
// ...

// scan these files for tolua interfaces:
${../Drw/Camera.hpp}
${../Drw/Terrain.hpp}
// ...
--- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< --- 8< ---

in files that you specify for scanning, all you need is to enclose the code
that you want to be exposed to tolua between a TOLUA_BEGIN and a TOLUA_END,
like this:

// TOLUA_BEGIN
enum {
	one,
	two,
	three
};
// TOLUA_END

with classes that you don't want to expose completely, this can become ugly:

// TOLUA_BEGIN
class Camera : public Object
{
// TOLUA_END
public:
	Camera();
private:
      int SomeInternalFunction();

public:
	// TOLUA_BEGIN
	// now the functions that i want exposed follow:
	void SwitchMode(int i);
	Vector3D GetPosition();
	// TOLUA_END

protected:
	int i,j,k;
	Vector3D Position;
// TOLUA_BEGIN
}
// TOLUA_END

thats why i hacked tolua and added another statement: TOLUA_CLASS
to avoid the cluttering with // TOLUA_BEGIN/END

Cheers,
Peter

> -----Original Message-----
> From: owner-lua-l@tecgraf.puc-rio.br
> [mailto:owner-lua-l@tecgraf.puc-rio.br]On Behalf Of Nick Trout
> Sent: Wednesday, July 10, 2002 5:44 PM
> To: Multiple recipients of list
> Subject: RE: using Lua and toLua
>
>
>
> > >From my own experiences i've found using tolua's built in
> > parsing to work
> > much better than using separate pkg files. I find it much much easier
> > maintaining your header files with some ToLUA commends than
> > to remember to
> > maintain another tolua package file.  Especially once the
> > project gets quite
> > large.
>
> I'm sorry, I feel like I've missed something here. Are you saying
> toLua has
> a preprocessor, you have one or you just get toLua to parse your C++ .h
> files instead of creating .pkg files? Perhaps you could expand on what you
> do?
>
> n
>