public Task <bool> Start(ILua lua, GetILuaFromLuaStatePointer lua_extructor, ModuleAssemblyLoadContext _)
{
TaskCompletionSource <bool> taskCompletion = new TaskCompletionSource <bool>();
try
{
/*
* //Test PushUserData
* lua.PushUserData((IntPtr)this.RandomInt);
*
* if(lua.GetUserType(-1, (int)TYPES.USERDATA) != (IntPtr)this.RandomInt)
* {
* throw new Exception("GetUserType returned incorrect pointer after PushUserData");
* }
*
* lua.Pop(1);
*/
//Test PushUserType
this.Type_Id = lua.CreateMetaTable("UserDataTestType");
lua.Pop(1);
lua.PushUserType((IntPtr)RandomInt2, this.Type_Id);
if (lua.GetUserType(-1, this.Type_Id) != (IntPtr)this.RandomInt2)
{
throw new Exception("GetUserType returned incorrect pointer after PushUserType");
}
//Test SetUserType
lua.SetUserType(-1, (IntPtr)this.RandomInt3);
if (lua.GetUserType(-1, this.Type_Id) != (IntPtr)this.RandomInt3)
{
throw new Exception("GetUserType returned incorrect pointer after SetUserType");
}
//Additional test for GetType and IsType
if (lua.GetType(-1) != this.Type_Id)
{
throw new Exception("GetType returned incorrect type id on usertype");
}
if (!lua.IsType(-1, this.Type_Id))
{
throw new Exception("IsType returned false on usertype");
}
lua.Pop(1);
taskCompletion.TrySetResult(true);
}
catch (Exception e)
{
taskCompletion.TrySetException(new Exception[] { e });
}
return(taskCompletion.Task);
}
public Task <bool> Start(ILua lua, GetILuaFromLuaStatePointer lua_extructor, ModuleAssemblyLoadContext _)
{
TaskCompletionSource <bool> taskCompletion = new TaskCompletionSource <bool>();
try
{
lua.PushNumber(1);
lua.PushString("Dima is the best boy.");
lua.PushBool(true);
lua.PushNil();
if (!lua.IsType(-4, TYPES.NUMBER))
{
throw new Exception("IsType returned false on NUMBER type");
}
if (!lua.IsType(-3, TYPES.STRING))
{
throw new Exception("IsType returned false on STRING type");
}
if (!lua.IsType(-2, TYPES.BOOL))
{
throw new Exception("IsType returned false on BOOL type");
}
if (!lua.IsType(-1, TYPES.NIL))
{
throw new Exception("IsType returned false on NIL type");
}
lua.Pop(4);
taskCompletion.TrySetResult(true);
}
catch (Exception e)
{
taskCompletion.TrySetException(new Exception[] { e });
}
return(taskCompletion.Task);
}
public void Load(ILua lua, bool is_serverside, ModuleAssemblyLoadContext assembly_context)
{
// create usertype identifier
UserType_Id = lua.CreateMetaTable("Example_UserType");
// set meta-methods
// see http://www.tutorialspoint.com/lua/lua_metatables.htm for all meta-methods
// also checkout https://www.lua.org/pil/13.html for explanation about meta-methods/tables
// __index method
// __index is called when you trying to index usertype ex:
// MyCSString.Length
// MyCSString:ToCharArray()
// FindMetaTable("Example_UserType").ToCharArray(MyCSString)
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
string indexingname = lua.GetString(2);
switch (indexingname)
{
// pushing simple number
case "Length":
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.PushNumber(csString.Length);
break;
// pushing function
case "ToCharArray":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.CreateTable();
char[] charArray = csString.ToCharArray();
for (int i = 0; i < charArray.Length; i++)
{
lua.PushNumber(i);
lua.PushString(charArray[i].ToString());
lua.SetTable(-3);
}
return(1);
});
break;
case "Clone":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr1 = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle1 = GCHandle.FromIntPtr(ptr1);
string csString1 = (string)gCHandle1.Target;
string csString2 = (string)csString1.Clone();
GCHandle gCHandle2 = GCHandle.Alloc(csString2, GCHandleType.Weak);
IntPtr ptr2 = GCHandle.ToIntPtr(gCHandle2);
lua.PushUserType(ptr2, UserType_Id);
return(1);
});
break;
case "IndexOf":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
string toFind;
if (lua.IsType(2, TYPES.STRING))
{
toFind = lua.GetString(2);
}
else if (lua.IsType(2, UserType_Id))
{
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
toFind = (string)gCHandle2.Target;
}
else
{
return(0);
}
int indexOf = csString.IndexOf(toFind);
lua.PushNumber(indexOf);
return(1);
});
break;
case "Contains":
lua.PushManagedFunction((lua) =>
{
IntPtr ptr = lua.GetUserType(1, UserType_Id);
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
string toFind;
if (lua.IsType(2, TYPES.STRING))
{
toFind = lua.GetString(2);
}
else if (lua.IsType(2, UserType_Id))
{
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
toFind = (string)gCHandle2.Target;
}
else
{
return(0);
}
bool contains = csString.Contains(toFind);
lua.PushBool(contains);
return(1);
});
break;
default:
lua.PushNil();
break;
}
}
else
{
Console.WriteLine("nil passed to __index");
lua.PushNil();
}
// function will return 1 result
return(1);
});
lua.SetField(-2, "__index");
lua.PushManagedFunction((lua) =>
{
// 1 - stands for 1st passed to function argument
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
lua.PushString(csString);
}
else
{
Console.WriteLine("nil passed to __tostring");
lua.PushNil();
}
return(1);
});
lua.SetField(-2, "__tostring");
// equal (==) method
lua.PushManagedFunction((lua) =>
{
IntPtr ptr1 = lua.GetUserType(1, UserType_Id);
IntPtr ptr2 = lua.GetUserType(2, UserType_Id);
// if we have same pointers, then objects are same
if (ptr1 == ptr2)
{
lua.PushBool(true);
}
// check if both pointers not zero
else if (ptr1 != IntPtr.Zero && ptr2 != IntPtr.Zero)
{
GCHandle gCHandle1 = GCHandle.FromIntPtr(ptr1);
GCHandle gCHandle2 = GCHandle.FromIntPtr(ptr2);
string csString1 = (string)gCHandle1.Target;
string csString2 = (string)gCHandle2.Target;
lua.PushBool(csString1 == csString2);
}
// some of pointers is Zero, we'll not compare them
else
{
lua.PushBool(false);
}
return(1);
});
lua.SetField(-2, "__eq");
// Dispose() in lua
lua.PushManagedFunction((lua) =>
{
// 1 - stands for 1st passed to function argument
IntPtr ptr = lua.GetUserType(1, UserType_Id);
if (ptr != IntPtr.Zero)
{
GCHandle gCHandle = GCHandle.FromIntPtr(ptr);
string csString = (string)gCHandle.Target;
Console.WriteLine($"csString ({csString}) is garbage collected");
gCHandle.Free();
}
else
{
Console.WriteLine("nil passed to __gc");
}
return(0);
});
lua.SetField(-2, "__gc");
lua.Pop();
// now we need to somehow create it
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.PushManagedFunction((lua) =>
{
string csString = lua.GetString(1);
GCHandle gCHandle = GCHandle.Alloc(csString, GCHandleType.Weak);
IntPtr ptr = GCHandle.ToIntPtr(gCHandle);
lua.PushUserType(ptr, UserType_Id);
return(1);
});
lua.SetField(-2, "CreateCSString");
lua.Pop();
}