1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/* Copyright 2015-2016 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#pragma once
namespace Diligent
{
class LuaFunctionCallerBase
{
public:
LuaFunctionCallerBase( lua_State *LuaState = nullptr ) :
m_LuaState( LuaState )
{
};
void SetLuaState( lua_State *LuaState )
{
m_LuaState = LuaState;
}
// We need these stubs to hide implementation details
void PushFuncStub( lua_State *L, Bool Arg );
void PushFuncStub( lua_State *L, Int32 Arg );
void PushFuncStub( lua_State *L, Uint32 Arg );
void PushFuncStub( lua_State *L, Int16 Arg );
void PushFuncStub( lua_State *L, Uint16 Arg );
void PushFuncStub( lua_State *L, Int8 Arg );
void PushFuncStub( lua_State *L, Uint8 Arg );
void PushFuncStub( lua_State *L, float Arg );
void PushFuncStub( lua_State *L, const Char *Arg );
void PushFuncStub( lua_State *L, const String &Arg );
protected:
void Run_internal( int NumArgs, const Char *FuncName );
lua_State *m_LuaState;
};
class DummyPushFuncs
{
public:
void PushFuncStub();
};
template<typename AdditionalPushFuncs = DummyPushFuncs>
class LuaFunctionCaller : public LuaFunctionCallerBase, public AdditionalPushFuncs
{
public:
void operator()()
{
operator()( nullptr );
}
template<typename... ArgsType>
void operator()( const Char *FuncName, const ArgsType&... Args )
{
Run_internal( 0, FuncName, Args... );
}
// We need to make visible these parent-class definitions here
using LuaFunctionCallerBase::PushFuncStub;
using LuaFunctionCallerBase::Run_internal;
using AdditionalPushFuncs::PushFuncStub;
protected:
template<typename ArgType>
void Run_internal( int NumArgs, const Char *FuncName, const ArgType &Arg )
{
PushFuncStub( m_LuaState, Arg );
Run_internal( NumArgs + 1, FuncName );
}
template<typename ArgType, typename... RestArgsType>
void Run_internal( int NumArgs, const Char *FuncName, const ArgType &Arg, const RestArgsType&... RestArgs )
{
PushFuncStub( m_LuaState, Arg );
Run_internal( NumArgs + 1, FuncName, RestArgs... ); // recursive call using pack expansion syntax
}
};
}
|
