public void userdata()
{
var L = Melua.luaL_newstate();
Melua.melua_opensafelibs(L);
var n1 = 0;
// Ctor
Melua.luaL_register(L, "Test", new[]
{
new MeluaLib.Melua.LuaLib("new", NL =>
{
var test = new UserDataTest()
{
N1 = 1234
};
var size = Marshal.SizeOf(test);
var ptr = Melua.lua_newuserdata(L, size);
Melua.luaL_getmetatable(L, "Melua.Test");
Melua.lua_setmetatable(L, -2);
Marshal.StructureToPtr(test, ptr, true);
return(1);
})
});
// Meta table for test userdata type
Melua.luaL_newmetatable(L, "Melua.Test");
Melua.lua_pushstring(L, "__index");
Melua.lua_pushvalue(L, -2);
Melua.lua_settable(L, -3);
Melua.luaL_register(L, null, new[]
{
new MeluaLib.Melua.LuaLib("setN1", _ =>
{
var ptr = Melua.luaL_checkudata(L, 1, "Melua.Test");
var val = Melua.luaL_checkinteger(L, 2);
// Either marshal back and forth or use unsafe
var test = (UserDataTest)Marshal.PtrToStructure(ptr, typeof(UserDataTest));
test.N1 = val;
Marshal.StructureToPtr(test, ptr, true);
//unsafe
//{
// var test = (UserDataTest*)ptr;
// test->N1 = val;
//}
return(0);
}),
new MeluaLib.Melua.LuaLib("getN1", _ =>
{
var ptr = Melua.luaL_checkudata(L, 1, "Melua.Test");
var test = (UserDataTest)Marshal.PtrToStructure(ptr, typeof(UserDataTest));
Melua.lua_pushinteger(L, test.N1);
return(1);
})
});
// Test method
Melua.melua_register(L, "testgetn1", _ =>
{
n1 = Melua.lua_tointeger(L, -1);
return(0);
});
var result = Melua.luaL_dostring(L, @"
local t = Test.new()
t:setN1(5678)
testgetn1(t:getN1())
");
if (result != 0)
{
throw new Exception(Melua.lua_tostring(L, -1));
}
Assert.Equal(n1, 5678);
}