在Lua中注册C ++函数? [英] Register C++ function in Lua?
问题描述
我试图在Lua中注册一个c ++函数。
但遇到此错误:
CScript.cpp |错误:类型的参数'int(CScript ::)(lua_State *)'不匹配'int(*)(lua_State *)'|
编辑:
code> int CApp :: SetDisplayMode(int Width,int Height,int Depth)
{
this-> Screen_Width = Width;
this-> Screen_Height = Height;
this-> Screen_Depth = Depth;
return 0;
}
int CScript :: Lua_SetDisplayMode(lua_State * L)
{
//我们需要至少一个参数
int n = lua_gettop );
if(n< 0)
{
lua_pushstring(L,Not enough parameter。
lua_error(L);
}
int width = lua_tointeger(L,1);
int height = lua_tointeger(L,2);
int depth = lua_tointeger(L,3);
lua_pushinteger(L,App-> SetDisplayMode(width,height,depth));
return 0;
}
而在主要:
lua_register(L,setDisplayMode,Lua_SetDisplayMode);
然而,存在的用于容易地将C ++代码与Lua相关联的任何各种机制将允许在Lua中使用仅仅基本的Lua C API的Lua中的C ++非静态成员函数。
<你这样做。 toLua ++ , SWIG , Luabind 等。如果您认真对待使用C ++对象与Lua,我建议挑选其中之一,并使用它,而不是编写自己的版本。我个人使用Luabind(大多数时候; SWIG在工具箱中的位置),因为它是没有某种形式的代码生成的。它完全是在C ++中完成的,因此没有生成C ++源文件的预传递步骤。
I am trying to register a c++ function in Lua.
But getting this error:
CScript.cpp|39|error: argument of type 'int (CScript::)(lua_State*)' does not match 'int (*)(lua_State*)'|
EDIT:
int CApp::SetDisplayMode(int Width, int Height, int Depth)
{
this->Screen_Width = Width;
this->Screen_Height = Height;
this->Screen_Depth = Depth;
return 0;
}
int CScript::Lua_SetDisplayMode(lua_State* L)
{
// We need at least one parameter
int n = lua_gettop(L);
if(n < 0)
{
lua_pushstring(L, "Not enough parameter.");
lua_error(L);
}
int width = lua_tointeger(L, 1);
int height = lua_tointeger(L, 2);
int depth = lua_tointeger(L, 3);
lua_pushinteger(L, App->SetDisplayMode(width, height, depth));
return 0;
}
And in main:
lua_register(L, "setDisplayMode", Lua_SetDisplayMode);
You cannot directly register a C++ non-static member function in Lua using just the basic Lua C API.
However, any of the various mechanisms that exist for easily associating C++ code with Lua will allow you to do so. toLua++, SWIG, Luabind, etc. If you're serious about using C++ objects with Lua, I suggest picking one of those and using it, rather than writing your own version. I personally use Luabind (most of the time; SWIG has its place in the toolbox), as it is the one that doesn't have some form of code generation. It's all done purely in C++, so there's no pre-pass step that generates a C++ source file.
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