带有in修饰参数的方法，被编译成ref。

[sunyujia-rakuten]

1.环境

xlua 版本 v2.1.15 Editor 2021.3.3f1c1

2.复现步骤

• a.新建一个测试类

namespace TestIn
{
    public static class InClass
    {
        public static void InMethod(in string name)
        {
        }
    }
} 

• b. GenConfig.cs中加入配置

[LuaCallCSharp] public static List<Type> LuaCallCSharp = new()
    {
          
            typeof(TestIn.InClass)
   };

• c.点击Xlua -> Clear Generated Code -> Generate Code
• d.编译报错 Assets/XLua/Gen/TestIn_InClassWrap.cs(69,50): error CS1615: Argument 1 may not be passed with the 'ref' keyword

报错指向这一行： TestIn.InClass.InMethod(ref _name);

3.报错文件

using LuaAPI = UniLua.Lua;
using RealStatePtr = UniLua.ILuaState;
using LuaCSFunction = UniLua.CSharpFunctionDelegate;
#else
using LuaAPI = XLua.LuaDLL.Lua;
using RealStatePtr = System.IntPtr;
using LuaCSFunction = XLua.LuaDLL.lua_CSFunction;
#endif

using XLua;
using System.Collections.Generic;


namespace XLua.CSObjectWrap
{
    using Utils = XLua.Utils;

    public class TestInInClassWrap
    {
        public static void __Register(RealStatePtr L)
        {
            ObjectTranslator translator = ObjectTranslatorPool.Instance.Find(L);
            System.Type type = typeof(TestIn.InClass);
            Utils.BeginObjectRegister(type, L, translator, 0, 0, 0, 0);
            Utils.EndObjectRegister(type, L, translator, null, null,
                null, null, null);
            Utils.BeginClassRegister(type, L, __CreateInstance, 2, 0, 0);
            Utils.RegisterFunc(L, Utils.CLS_IDX, "InMethod", _m_InMethod_xlua_st_);
            Utils.EndClassRegister(type, L, translator);
        }

        [MonoPInvokeCallbackAttribute(typeof(LuaCSFunction))]
        static int __CreateInstance(RealStatePtr L)
        {
            return LuaAPI.luaL_error(L, "TestIn.InClass does not have a constructor!");
        }


        [MonoPInvokeCallbackAttribute(typeof(LuaCSFunction))]
        static int _m_InMethod_xlua_st_(RealStatePtr L)
        {
            try
            {
                {
                    string _name = LuaAPI.lua_tostring(L, 1);

                    TestIn.InClass.InMethod(ref _name);
                    LuaAPI.lua_pushstring(L, _name);
                    return 1;
                }
            }
            catch (System.Exception gen_e)
            {
                return LuaAPI.luaL_error(L, "c# exception:" + gen_e);
            }
        }
    }
}

[AutoMaintyc]

把in换成ref

[Lubei-1115]

找到 LuaClassWrap.tpl.txt 文件。其中有一句： if pi ~= 0 then %>, <% end; if parameter.IsOut and parameter.ParameterType.IsByRef then %>out <% elseif parameter.ParameterType.IsByRef then %>ref <% end %><%=LocalName(parameter.Name)%><% end) %> ); 修改为： if pi ~= 0 then %>, <% end; if parameter.IsOut and parameter.ParameterType.IsByRef then %>out <% elseif parameter.IsIn and parameter.ParameterType.IsByRef then %>in <% elseif parameter.ParameterType.IsByRef then %>ref <% end %><%=LocalName(parameter.Name)%><% end) %> ); 然后重新生成试试

[iwrbcn]

委托生成文件：LuaDelegateBridge.tpl.txt，可以试着这样修改 修改1： if parameter.IsOut and parameter.ParameterType.IsByRef then %>out <% elseif parameter.ParameterType.IsByRef then %>ref <% end 修改为： if parameter.IsOut and parameter.ParameterType.IsByRef then %>out <% elseif parameter.IsIn and parameter.ParameterType.IsByRef then %>in <% elseif parameter.ParameterType.IsByRef then %>ref <% end 修改2： <%ForEachCsList(parameters, function(parameter, pi) if parameter.IsOut or parameter.ParameterType.IsByRef then %><%=GetCasterStatement(parameter.ParameterType, "errFunc" .. (" + "..out_idx), 'p' .. pi)%>; <% out_idx = out_idx + 1 end end) %> 修改为： <%ForEachCsList(parameters, function(parameter, pi) if parameter.IsOut or (parameter.ParameterType.IsByRef and not parameter.IsIn) then %><%=GetCasterStatement(parameter.ParameterType, "errFunc" .. (" + "..out_idx), 'p' .. pi)%>; <% out_idx = out_idx + 1 end end) %>