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Diffstat (limited to 'RenderScript/include/LuaFunctionBinding.h')
| -rw-r--r-- | RenderScript/include/LuaFunctionBinding.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/RenderScript/include/LuaFunctionBinding.h b/RenderScript/include/LuaFunctionBinding.h new file mode 100644 index 0000000..a51a7b9 --- /dev/null +++ b/RenderScript/include/LuaFunctionBinding.h @@ -0,0 +1,100 @@ +/* Copyright 2015 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 + } + }; +} |
