1556 lines
44 KiB
C#
1556 lines
44 KiB
C#
using System;
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using System.Linq;
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using System.Reflection;
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using System.Diagnostics;
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using System.Collections.Generic;
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using NLua.Exceptions;
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using NLua.Extensions;
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using NLua.Method;
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using NLua.Native;
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namespace NLua
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{
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internal class MetaFunctions
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{
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public static readonly LuaNativeFunction GcFunction = CollectObject;
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public static readonly LuaNativeFunction IndexFunction = GetMethod;
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public static readonly LuaNativeFunction NewIndexFunction = SetFieldOrProperty;
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public static readonly LuaNativeFunction BaseIndexFunction = GetBaseMethod;
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public static readonly LuaNativeFunction ClassIndexFunction = GetClassMethod;
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public static readonly LuaNativeFunction ClassNewIndexFunction = SetClassFieldOrProperty;
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public static readonly LuaNativeFunction ExecuteDelegateFunction = RunFunctionDelegate;
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public static readonly LuaNativeFunction CallConstructorFunction = CallConstructor;
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public static readonly LuaNativeFunction ToStringFunction = ToStringLua;
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public static readonly LuaNativeFunction CallDelegateFunction = CallDelegate;
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public static readonly LuaNativeFunction AddFunction = AddLua;
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public static readonly LuaNativeFunction SubtractFunction = SubtractLua;
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public static readonly LuaNativeFunction MultiplyFunction = MultiplyLua;
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public static readonly LuaNativeFunction DivisionFunction = DivideLua;
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public static readonly LuaNativeFunction ModulosFunction = ModLua;
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public static readonly LuaNativeFunction UnaryNegationFunction = UnaryNegationLua;
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public static readonly LuaNativeFunction EqualFunction = EqualLua;
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public static readonly LuaNativeFunction LessThanFunction = LessThanLua;
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public static readonly LuaNativeFunction LessThanOrEqualFunction = LessThanOrEqualLua;
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internal readonly Dictionary<object, Dictionary<object, object>> _memberCache = new();
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internal readonly ObjectTranslator _translator;
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/// <summary>
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/// __index metafunction for CLR objects. Implemented in Lua.
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/// </summary>
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public const string LuaIndexFunction = @"local a={}local function b(c,d)local e=getmetatable(c)local f=e.cache[d]if f~=nil then if f==a then return nil end;return f else local g,h=get_object_member(c,d)if h then if g==nil then e.cache[d]=a else e.cache[d]=g end end;return g end end;return b";
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//@"local fakenil = {}
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// local function index(obj, name)
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// local meta = getmetatable(obj)
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// local cached = meta.cache[name]
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// if cached ~= nil then
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// if cached == fakenil then
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// return nil
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// end
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// return cached
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// else
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// local value, isCached = get_object_member(obj, name)
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// if isCached then
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// if value == nil then
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// meta.cache[name] = fakenil
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// else
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// meta.cache[name] = value
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// end
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// end
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// return value
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// end
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// end
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// return index";
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public MetaFunctions(ObjectTranslator translator)
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{
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_translator = translator;
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}
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/// <summary>
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/// __call metafunction of CLR delegates, retrieves and calls the delegate.
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/// </summary>
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private static int RunFunctionDelegate(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var func = (LuaNativeFunction)translator.GetRawNetObject(state, 1);
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if (func == null)
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{
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return state.Error();
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}
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state.Remove(1);
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var result = func(luaState);
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if (translator.GetObject(state, -1) is LuaScriptException)
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{
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return state.Error();
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}
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if (state != state.MainThread)
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{
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if (translator.GetObject(state.MainThread, -1) is LuaScriptException)
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{
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return state.Error();
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}
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}
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return result;
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}
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/// <summary>
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/// __gc metafunction of CLR objects.
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/// </summary>
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private static int CollectObject(IntPtr state)
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{
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var luaState = LuaState.FromIntPtr(state);
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var translator = ObjectTranslatorPool.Instance.Find(luaState);
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return CollectObject(luaState, translator);
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}
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private static int CollectObject(LuaState luaState, ObjectTranslator translator)
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{
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var udata = luaState.RawNetObj(1);
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if (udata != -1)
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{
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translator.CollectObject(udata);
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}
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return 0;
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}
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/// <summary>
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/// __tostring metafunction of CLR objects.
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/// </summary>
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private static int ToStringLua(IntPtr state)
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{
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var luaState = LuaState.FromIntPtr(state);
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var translator = ObjectTranslatorPool.Instance.Find(luaState);
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return ToStringLua(luaState, translator);
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}
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private static int ToStringLua(LuaState luaState, ObjectTranslator translator)
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{
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var obj = translator.GetRawNetObject(luaState, 1);
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if (obj != null)
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{
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translator.Push(luaState, obj + ": " + obj.GetHashCode());
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}
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else
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{
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luaState.PushNil();
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}
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return 1;
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}
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/// <summary>
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/// __add metafunction of CLR objects.
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/// </summary>
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internal static int AddLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Addition", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __sub metafunction of CLR objects.
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/// </summary>
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internal static int SubtractLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Subtraction", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __mul metafunction of CLR objects.
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/// </summary>
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internal static int MultiplyLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Multiply", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __div metafunction of CLR objects.
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/// </summary>
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internal static int DivideLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Division", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __mod metafunction of CLR objects.
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/// </summary>
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internal static int ModLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Modulus", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __unm metafunction of CLR objects.
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/// </summary>
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internal static int UnaryNegationLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = UnaryNegationLua(state, translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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internal static int UnaryNegationLua(LuaState luaState, ObjectTranslator translator) //-V3009
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{
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var obj1 = translator.GetRawNetObject(luaState, 1);
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if (obj1 == null)
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{
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translator.ThrowError(luaState, "Cannot negate a nil object");
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return 1;
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}
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var type = obj1.GetType();
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var opUnaryNegation = type.GetMethod("op_UnaryNegation");
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if (opUnaryNegation == null)
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{
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translator.ThrowError(luaState, "Cannot negate object (" + type.Name + " does not overload the operator -)");
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return 1;
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}
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obj1 = opUnaryNegation.Invoke(obj1, new[] { obj1 });
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translator.Push(luaState, obj1);
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return 1;
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}
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/// <summary>
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/// __eq metafunction of CLR objects.
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/// </summary>
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internal static int EqualLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_Equality", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __lt metafunction of CLR objects.
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/// </summary>
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internal static int LessThanLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_LessThan", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// __le metafunction of CLR objects.
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/// </summary>
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internal static int LessThanOrEqualLua(IntPtr luaState)
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{
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var state = LuaState.FromIntPtr(luaState);
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var translator = ObjectTranslatorPool.Instance.Find(state);
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var result = MatchOperator(state, "op_LessThanOrEqual", translator);
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return translator.GetObject(state, -1) is LuaScriptException ? state.Error() : result;
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}
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/// <summary>
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/// Called by the __index metafunction of CLR objects in case the
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/// method is not cached or it is a field/property/event.
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/// Receives the object and the member name as arguments and returns
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/// either the value of the member or a delegate to call it.
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/// If the member does not exist returns nil.
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/// </summary>
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private static int GetMethod(IntPtr state)
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{
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var luaState = LuaState.FromIntPtr(state);
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var translator = ObjectTranslatorPool.Instance.Find(luaState);
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var instance = translator.MetaFunctionsInstance;
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var result = instance.GetMethodInternal(luaState);
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return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
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}
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private int GetMethodInternal(LuaState luaState)
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{
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var obj = _translator.GetRawNetObject(luaState, 1);
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if (obj == null)
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{
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_translator.ThrowError(luaState, "Trying to index an invalid object reference");
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return 1;
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}
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var index = _translator.GetObject(luaState, 2);
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var methodName = index as string; // will be null if not a string arg
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var objType = obj.GetType();
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var proxyType = new ProxyType(objType);
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// Handle the most common case, looking up the method by name.
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// CP: This will fail when using indexers and attempting to get a value with the same name as a property of the object,
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// ie: xmlelement['item'] <- item is a property of xmlelement
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if (!string.IsNullOrEmpty(methodName) && IsMemberPresent(proxyType, methodName))
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{
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return GetMember(luaState, proxyType, obj, methodName, BindingFlags.Instance);
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}
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// Try to access by array if the type is right and index is an int (lua numbers always come across as double)
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if (TryAccessByArray(luaState, objType, obj, index))
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{
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return 1;
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}
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var fallback = GetMethodFallback(luaState, objType, obj, methodName);
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if (fallback != 0)
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{
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return fallback;
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}
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if (!string.IsNullOrEmpty(methodName) || index != null)
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{
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if (string.IsNullOrEmpty(methodName))
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{
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methodName = index.ToString();
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}
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return PushInvalidMethodCall(luaState, objType, methodName);
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}
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luaState.PushBoolean(false);
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return 2;
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}
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private int PushInvalidMethodCall(LuaState luaState, Type type, string name)
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{
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SetMemberCache(type, name, null);
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_translator.Push(luaState, null);
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_translator.Push(luaState, false);
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return 2;
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}
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private bool TryAccessByArray(LuaState luaState, Type objType, object obj, object index)
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{
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if (!objType.IsArray)
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{
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return false;
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}
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var intIndex = index switch
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{
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long l => (int)l,
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double d => (int)d,
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_ => -1
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};
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if (intIndex == -1)
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{
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return false;
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}
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var type = objType.UnderlyingSystemType;
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if (type == typeof(long[]))
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{
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var arr = (long[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(float[]))
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{
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var arr = (float[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(double[]))
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{
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var arr = (double[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(int[]))
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{
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var arr = (int[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(byte[]))
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{
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var arr = (byte[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(short[]))
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{
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var arr = (short[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(ushort[]))
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{
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var arr = (ushort[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(ulong[]))
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{
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var arr = (ulong[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(uint[]))
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{
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var arr = (uint[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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if (type == typeof(sbyte[]))
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{
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var arr = (sbyte[])obj;
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_translator.Push(luaState, arr[intIndex]);
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return true;
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}
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var array = (Array)obj;
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var element = array.GetValue(intIndex);
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_translator.Push(luaState, element);
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return true;
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}
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private int GetMethodFallback(LuaState luaState, Type objType, object obj, string methodName)
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{
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if (!string.IsNullOrEmpty(methodName) && TryGetExtensionMethod(objType, methodName, out var method))
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{
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return PushExtensionMethod(luaState, objType, obj, methodName, method);
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}
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// Try to use get_Item to index into this .net object
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var methods = objType.GetMethods();
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var res = TryIndexMethods(luaState, methods, obj);
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if (res != 0)
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{
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return res;
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}
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// Fallback to GetRuntimeMethods
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methods = objType.GetRuntimeMethods().ToArray();
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res = TryIndexMethods(luaState, methods, obj);
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if (res != 0)
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{
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return res;
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}
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res = TryGetValueForKeyMethods(luaState, methods, obj);
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if (res != 0)
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{
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return res;
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}
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// Try find explicity interface implementation
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var explicitInterfaceMethod = objType.GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
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.FirstOrDefault(m => m.Name == methodName && m.IsPrivate && m.IsVirtual && m.IsFinal);
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if (explicitInterfaceMethod != null)
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{
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var proxyType = new ProxyType(objType);
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var methodWrapper = new LuaMethodWrapper(_translator, obj, proxyType, explicitInterfaceMethod);
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var invokeDelegate = new LuaNativeFunction(methodWrapper.InvokeFunction);
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SetMemberCache(proxyType, methodName, invokeDelegate);
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_translator.PushFunction(luaState, invokeDelegate);
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_translator.Push(luaState, true);
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return 2;
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}
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return 0;
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}
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private int TryGetValueForKeyMethods(LuaState luaState, IEnumerable<MethodInfo> methods, object obj)
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{
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foreach (var methodInfo in methods)
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{
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if (methodInfo.Name != "TryGetValueForKey")
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{
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continue;
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}
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// Check if the signature matches the input
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if (methodInfo.GetParameters().Length != 2)
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{
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continue;
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}
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var actualParams = methodInfo.GetParameters();
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// Get the index in a form acceptable to the getter
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var index = _translator.GetAsType(luaState, 2, actualParams[0].ParameterType);
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// If the index type and the parameter doesn't match, just skip it
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if (index == null)
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{
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break;
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}
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// Just call the indexer - if out of bounds an exception will happen
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var args = new[] { index, null };
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try
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{
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var found = (bool)methodInfo.Invoke(obj, args);
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if (!found)
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{
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_translator.ThrowError(luaState, "key not found: " + index);
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return 1;
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}
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_translator.Push(luaState, args[1]);
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return 1;
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}
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catch (TargetInvocationException e)
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{
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// Provide a more readable description for the common case of key not found
|
|
if (e.InnerException is KeyNotFoundException)
|
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{
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_translator.ThrowError(luaState, "key '" + index + "' not found ");
|
|
}
|
|
else
|
|
{
|
|
_translator.ThrowError(luaState, "exception indexing '" + index + "' " + e.Message);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
private int TryIndexMethods(LuaState luaState, IEnumerable<MethodInfo> methods, object obj)
|
|
{
|
|
foreach (var methodInfo in methods)
|
|
{
|
|
if (methodInfo.Name != "get_Item")
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Check if the signature matches the input
|
|
if (methodInfo.GetParameters().Length != 1)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
var actualParams = methodInfo.GetParameters();
|
|
|
|
// Get the index in a form acceptable to the getter
|
|
var index = _translator.GetAsType(luaState, 2, actualParams[0].ParameterType);
|
|
|
|
// If the index type and the parameter doesn't match, just skip it
|
|
if (index == null)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Just call the indexer - if out of bounds an exception will happen
|
|
var args = new[] { index };
|
|
try
|
|
{
|
|
var result = methodInfo.Invoke(obj, args);
|
|
_translator.Push(luaState, result);
|
|
return 1;
|
|
}
|
|
catch (TargetInvocationException e)
|
|
{
|
|
// Provide a more readable description for the common case of key not found
|
|
if (e.InnerException is KeyNotFoundException)
|
|
{
|
|
_translator.ThrowError(luaState, "key '" + index + "' not found ");
|
|
}
|
|
else
|
|
{
|
|
_translator.ThrowError(luaState, "exception indexing '" + index + "' " + e.Message);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// __index metafunction of base classes (the base field of Lua tables).
|
|
/// Adds a prefix to the method name to call the base version of the method.
|
|
/// </summary>
|
|
private static int GetBaseMethod(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.GetBaseMethodInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
private int GetBaseMethodInternal(LuaState luaState)
|
|
{
|
|
var obj = _translator.GetRawNetObject(luaState, 1);
|
|
if (obj == null)
|
|
{
|
|
_translator.ThrowError(luaState, "Trying to index an invalid object reference");
|
|
return 1;
|
|
}
|
|
|
|
var methodName = luaState.ToString(2, false);
|
|
if (string.IsNullOrEmpty(methodName))
|
|
{
|
|
luaState.PushNil();
|
|
luaState.PushBoolean(false);
|
|
return 2;
|
|
}
|
|
|
|
GetMember(luaState, new(obj.GetType()), obj, "__luaInterface_base_" + methodName, BindingFlags.Instance);
|
|
luaState.SetTop(-2);
|
|
|
|
if (luaState.Type(-1) == LuaType.Nil)
|
|
{
|
|
luaState.SetTop(-2);
|
|
return GetMember(luaState, new(obj.GetType()), obj, methodName, BindingFlags.Instance);
|
|
}
|
|
|
|
luaState.PushBoolean(false);
|
|
return 2;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Does this method exist as either an instance or static?
|
|
/// </summary>
|
|
/// <param name="objType"></param>
|
|
/// <param name="methodName"></param>
|
|
/// <returns></returns>
|
|
internal bool IsMemberPresent(ProxyType objType, string methodName)
|
|
{
|
|
var cachedMember = CheckMemberCache(objType, methodName);
|
|
if (cachedMember != null)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
var members = objType.GetMember(methodName, BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public);
|
|
return members.Length > 0;
|
|
}
|
|
|
|
internal bool TryGetExtensionMethod(Type type, string name, out object method)
|
|
{
|
|
var cachedMember = CheckMemberCache(type, name);
|
|
if (cachedMember != null)
|
|
{
|
|
method = cachedMember;
|
|
return true;
|
|
}
|
|
|
|
var found = _translator.TryGetExtensionMethod(type, name, out var methodInfo);
|
|
method = methodInfo;
|
|
return found;
|
|
}
|
|
|
|
internal int PushExtensionMethod(LuaState luaState, Type type, object obj, string name, object method)
|
|
{
|
|
if (method is LuaNativeFunction cachedMember)
|
|
{
|
|
_translator.PushFunction(luaState, cachedMember);
|
|
_translator.Push(luaState, true);
|
|
return 2;
|
|
}
|
|
|
|
var methodInfo = (MethodInfo)method;
|
|
var methodWrapper = new LuaMethodWrapper(_translator, obj, new(type), methodInfo);
|
|
var invokeDelegate = new LuaNativeFunction(methodWrapper.InvokeFunction);
|
|
|
|
SetMemberCache(type, name, invokeDelegate);
|
|
|
|
_translator.PushFunction(luaState, invokeDelegate);
|
|
_translator.Push(luaState, true);
|
|
return 2;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Pushes the value of a member or a delegate to call it, depending on the type of
|
|
/// the member. Works with static or instance members.
|
|
/// Uses reflection to find members, and stores the reflected MemberInfo object in
|
|
/// a cache (indexed by the type of the object and the name of the member).
|
|
/// </summary>
|
|
internal int GetMember(LuaState luaState, ProxyType objType, object obj, string methodName, BindingFlags bindingType)
|
|
{
|
|
while (true)
|
|
{
|
|
var implicitStatic = false;
|
|
MemberInfo member = null;
|
|
var cachedMember = CheckMemberCache(objType, methodName);
|
|
|
|
if (cachedMember is LuaNativeFunction function)
|
|
{
|
|
_translator.PushFunction(luaState, function);
|
|
_translator.Push(luaState, true);
|
|
return 2;
|
|
}
|
|
|
|
if (cachedMember != null)
|
|
{
|
|
member = (MemberInfo)cachedMember;
|
|
}
|
|
else
|
|
{
|
|
var members = objType.GetMember(methodName, bindingType | BindingFlags.Public);
|
|
|
|
if (members.Length > 0)
|
|
{
|
|
member = members[0];
|
|
}
|
|
else
|
|
{
|
|
// If we can't find any suitable instance members, try to find them as statics - but we only want to allow implicit static
|
|
members = objType.GetMember(methodName, bindingType | BindingFlags.Static | BindingFlags.Public);
|
|
|
|
if (members.Length > 0)
|
|
{
|
|
member = members[0];
|
|
implicitStatic = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (member != null)
|
|
{
|
|
switch (member.MemberType)
|
|
{
|
|
case MemberTypes.Field:
|
|
{
|
|
var field = (FieldInfo)member;
|
|
|
|
if (cachedMember == null)
|
|
{
|
|
SetMemberCache(objType, methodName, member);
|
|
}
|
|
|
|
try
|
|
{
|
|
var value = field.GetValue(obj);
|
|
_translator.Push(luaState, value);
|
|
}
|
|
catch
|
|
{
|
|
Debug.WriteLine("[Exception] Fail to get field value");
|
|
luaState.PushNil();
|
|
}
|
|
|
|
break;
|
|
}
|
|
case MemberTypes.Property:
|
|
{
|
|
var property = (PropertyInfo)member;
|
|
if (cachedMember == null)
|
|
{
|
|
SetMemberCache(objType, methodName, member);
|
|
}
|
|
|
|
try
|
|
{
|
|
var value = property.GetValue(obj, null);
|
|
_translator.Push(luaState, value);
|
|
}
|
|
catch (ArgumentException)
|
|
{
|
|
// If we can't find the getter in our class, recurse up to the base class and see
|
|
// if they can help.
|
|
if (objType.UnderlyingSystemType != typeof(object))
|
|
{
|
|
return GetMember(luaState, new ProxyType(objType.UnderlyingSystemType.BaseType), obj, methodName, bindingType);
|
|
}
|
|
|
|
luaState.PushNil();
|
|
}
|
|
catch (TargetInvocationException e)
|
|
{
|
|
// Convert this exception into a Lua error
|
|
ThrowError(luaState, e);
|
|
luaState.PushNil();
|
|
}
|
|
|
|
break;
|
|
}
|
|
case MemberTypes.Event:
|
|
{
|
|
var eventInfo = (EventInfo)member;
|
|
if (cachedMember == null)
|
|
{
|
|
SetMemberCache(objType, methodName, member);
|
|
}
|
|
|
|
_translator.Push(luaState, new RegisterEventHandler(_translator.PendingEvents, obj, eventInfo));
|
|
break;
|
|
}
|
|
case MemberTypes.All:
|
|
case MemberTypes.Constructor:
|
|
case MemberTypes.Custom:
|
|
case MemberTypes.Method:
|
|
case MemberTypes.NestedType:
|
|
case MemberTypes.TypeInfo:
|
|
default:
|
|
{
|
|
if (!implicitStatic)
|
|
{
|
|
if (member.MemberType == MemberTypes.NestedType && member.DeclaringType != null)
|
|
{
|
|
if (cachedMember == null)
|
|
{
|
|
SetMemberCache(objType, methodName, member);
|
|
}
|
|
|
|
// Find the name of our class
|
|
var name = member.Name;
|
|
var decType = member.DeclaringType;
|
|
|
|
// Build a new long name and try to find the type by name
|
|
var longName = decType.FullName + "+" + name;
|
|
var nestedType = _translator.FindType(longName);
|
|
_translator.PushType(luaState, nestedType);
|
|
}
|
|
else
|
|
{
|
|
// Member type must be 'method'
|
|
var methodWrapper = new LuaMethodWrapper(_translator, objType, methodName, bindingType);
|
|
var wrapper = methodWrapper.InvokeFunction;
|
|
|
|
if (cachedMember == null)
|
|
{
|
|
SetMemberCache(objType, methodName, wrapper);
|
|
}
|
|
|
|
_translator.PushFunction(luaState, wrapper);
|
|
_translator.Push(luaState, true);
|
|
return 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If we reach this point we found a static method, but can't use it in this context because the user passed in an instance
|
|
_translator.ThrowError(luaState, "Can't pass instance to static method " + methodName);
|
|
return 1;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (objType.UnderlyingSystemType != typeof(object))
|
|
{
|
|
objType = new(objType.UnderlyingSystemType.BaseType);
|
|
continue;
|
|
}
|
|
|
|
// We want to throw an exception because merely returning 'nil' in this case
|
|
// is not sufficient. valid data members may return nil and therefore there must be some
|
|
// way to know the member just doesn't exist.
|
|
_translator.ThrowError(luaState, "Unknown member name " + methodName);
|
|
return 1;
|
|
}
|
|
|
|
// Push false because we are NOT returning a function (see luaIndexFunction)
|
|
_translator.Push(luaState, false);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Checks if a MemberInfo object is cached, returning it or null.
|
|
/// </summary>
|
|
internal object CheckMemberCache(Type objType, string memberName)
|
|
=> CheckMemberCache(new ProxyType(objType), memberName);
|
|
|
|
internal object CheckMemberCache(ProxyType objType, string memberName)
|
|
{
|
|
if (!_memberCache.TryGetValue(objType, out var members))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (members == null || !members.TryGetValue(memberName, out var memberValue))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
return memberValue;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stores a MemberInfo object in the member cache.
|
|
/// </summary>
|
|
internal void SetMemberCache(Type objType, string memberName, object member)
|
|
=> SetMemberCache(new ProxyType(objType), memberName, member);
|
|
|
|
internal void SetMemberCache(ProxyType objType, string memberName, object member)
|
|
{
|
|
Dictionary<object, object> members;
|
|
|
|
if (_memberCache.TryGetValue(objType, out var memberCacheValue))
|
|
{
|
|
members = memberCacheValue;
|
|
}
|
|
else
|
|
{
|
|
members = new();
|
|
_memberCache[objType] = members;
|
|
}
|
|
|
|
members[memberName] = member;
|
|
}
|
|
|
|
/// <summary>
|
|
/// __newindex metafunction of CLR objects. Receives the object,
|
|
/// the member name and the value to be stored as arguments. Throws
|
|
/// and error if the assignment is invalid.
|
|
/// </summary>
|
|
private static int SetFieldOrProperty(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.SetFieldOrPropertyInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
private int SetFieldOrPropertyInternal(LuaState luaState)
|
|
{
|
|
var target = _translator.GetRawNetObject(luaState, 1);
|
|
if (target == null)
|
|
{
|
|
_translator.ThrowError(luaState, "trying to index and invalid object reference");
|
|
return 1;
|
|
}
|
|
|
|
// First try to look up the parameter as a property name
|
|
var type = target.GetType();
|
|
var didMember = TrySetMember(luaState, new(type), target, BindingFlags.Instance, out var detailMessage);
|
|
|
|
if (didMember)
|
|
{
|
|
return 0; // Must have found the property name
|
|
}
|
|
|
|
// We didn't find a property name, now see if we can use a [] style this accessor to set array contents
|
|
try
|
|
{
|
|
if (type.IsArray && luaState.IsNumber(2))
|
|
{
|
|
var index = (int)luaState.ToNumber(2);
|
|
var arr = (Array)target;
|
|
var val = _translator.GetAsType(luaState, 3, arr.GetType().GetElementType());
|
|
arr.SetValue(val, index);
|
|
}
|
|
else
|
|
{
|
|
// Try to see if we have a this[] accessor
|
|
var setter = type.GetMethod("set_Item");
|
|
if (setter != null)
|
|
{
|
|
var args = setter.GetParameters();
|
|
var valueType = args[1].ParameterType;
|
|
|
|
// The new value the user specified
|
|
var val = _translator.GetAsType(luaState, 3, valueType);
|
|
var indexType = args[0].ParameterType;
|
|
var index = _translator.GetAsType(luaState, 2, indexType);
|
|
|
|
// Just call the indexer - if out of bounds an exception will happen
|
|
var methodArgs = new[] { index, val };
|
|
setter.Invoke(target, methodArgs);
|
|
}
|
|
else
|
|
{
|
|
_translator.ThrowError(luaState, detailMessage); // Pass the original message from trySetMember because it is probably best
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
ThrowError(luaState, e);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tries to set a named property or field
|
|
/// </summary>
|
|
/// <param name="luaState"></param>
|
|
/// <param name="targetType"></param>
|
|
/// <param name="target"></param>
|
|
/// <param name="bindingType"></param>
|
|
/// <param name="detailMessage"></param>
|
|
/// <returns>false if unable to find the named member, true for success</returns>
|
|
internal bool TrySetMember(LuaState luaState, ProxyType targetType, object target, BindingFlags bindingType, out string detailMessage)
|
|
{
|
|
detailMessage = null; // No error yet
|
|
|
|
// If not already a string just return - we don't want to call tostring - which has the side effect of
|
|
// changing the lua typecode to string
|
|
// Note: We don't use isstring because the standard lua C isstring considers either strings or numbers to
|
|
// be true for isstring.
|
|
if (luaState.Type(2) != LuaType.String)
|
|
{
|
|
detailMessage = "property names must be strings";
|
|
return false;
|
|
}
|
|
|
|
// We only look up property names by string
|
|
var fieldName = luaState.ToString(2, false);
|
|
if (string.IsNullOrEmpty(fieldName) || !(char.IsLetter(fieldName[0]) || fieldName[0] == '_'))
|
|
{
|
|
detailMessage = "Invalid property name";
|
|
return false;
|
|
}
|
|
|
|
// Find our member via reflection or the cache
|
|
var member = (MemberInfo)CheckMemberCache(targetType, fieldName);
|
|
if (member == null)
|
|
{
|
|
var members = targetType.GetMember(fieldName, bindingType | BindingFlags.Public);
|
|
|
|
if (members.Length <= 0)
|
|
{
|
|
detailMessage = "field or property '" + fieldName + "' does not exist";
|
|
return false;
|
|
}
|
|
|
|
member = members[0];
|
|
SetMemberCache(targetType, fieldName, member);
|
|
}
|
|
|
|
switch (member.MemberType)
|
|
{
|
|
case MemberTypes.Field:
|
|
{
|
|
var field = (FieldInfo)member;
|
|
var val = _translator.GetAsType(luaState, 3, field.FieldType);
|
|
|
|
try
|
|
{
|
|
field.SetValue(target, val);
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
detailMessage = "Error setting field: " + e.Message;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
case MemberTypes.Property:
|
|
{
|
|
var property = (PropertyInfo)member;
|
|
var val = _translator.GetAsType(luaState, 3, property.PropertyType);
|
|
|
|
try
|
|
{
|
|
property.SetValue(target, val, null);
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
detailMessage = "Error setting property: " + e.Message;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
case MemberTypes.All:
|
|
case MemberTypes.Constructor:
|
|
case MemberTypes.Custom:
|
|
case MemberTypes.Event:
|
|
case MemberTypes.Method:
|
|
case MemberTypes.NestedType:
|
|
case MemberTypes.TypeInfo:
|
|
default:
|
|
detailMessage = "'" + fieldName + "' is not a .net field or property";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Writes to fields or properties, either static or instance. Throws an error
|
|
/// if the operation is invalid.
|
|
/// </summary>
|
|
private int SetMember(LuaState luaState, ProxyType targetType, object target, BindingFlags bindingType)
|
|
{
|
|
var success = TrySetMember(luaState, targetType, target, bindingType, out var detail);
|
|
if (!success)
|
|
{
|
|
_translator.ThrowError(luaState, detail);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert a C# exception into a Lua error
|
|
/// </summary>
|
|
/// <param name="e"></param>
|
|
/// <param name="luaState"></param>
|
|
/// We try to look into the exception to give the most meaningful description
|
|
internal void ThrowError(LuaState luaState, Exception e)
|
|
{
|
|
// If we got inside a reflection show what really happened
|
|
if (e is TargetInvocationException te)
|
|
{
|
|
e = te.InnerException;
|
|
}
|
|
|
|
_translator.ThrowError(luaState, e);
|
|
}
|
|
|
|
/// <summary>
|
|
/// __index metafunction of type references, works on static members.
|
|
/// </summary>
|
|
private static int GetClassMethod(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.GetClassMethodInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
private int GetClassMethodInternal(LuaState luaState)
|
|
{
|
|
if (_translator.GetRawNetObject(luaState, 1) is not ProxyType klass)
|
|
{
|
|
_translator.ThrowError(luaState, "Trying to index an invalid type reference");
|
|
return 1;
|
|
}
|
|
|
|
if (luaState.IsNumber(2))
|
|
{
|
|
var size = (int)luaState.ToNumber(2);
|
|
_translator.Push(luaState, Array.CreateInstance(klass.UnderlyingSystemType, size));
|
|
return 1;
|
|
}
|
|
|
|
var methodName = luaState.ToString(2, false);
|
|
if (string.IsNullOrEmpty(methodName))
|
|
{
|
|
luaState.PushNil();
|
|
return 1;
|
|
}
|
|
|
|
return GetMember(luaState, klass, null, methodName, BindingFlags.Static);
|
|
}
|
|
|
|
/// <summary>
|
|
/// __newindex function of type references, works on static members.
|
|
/// </summary>
|
|
private static int SetClassFieldOrProperty(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.SetClassFieldOrPropertyInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
private int SetClassFieldOrPropertyInternal(LuaState luaState)
|
|
{
|
|
if (_translator.GetRawNetObject(luaState, 1) is not ProxyType target)
|
|
{
|
|
_translator.ThrowError(luaState, "trying to index an invalid type reference");
|
|
return 1;
|
|
}
|
|
|
|
return SetMember(luaState, target, null, BindingFlags.Static);
|
|
}
|
|
|
|
/// <summary>
|
|
/// __call metafunction of Delegates.
|
|
/// </summary>
|
|
internal static int CallDelegate(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.CallDelegateInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
internal int CallDelegateInternal(LuaState luaState)
|
|
{
|
|
if (_translator.GetRawNetObject(luaState, 1) is not Delegate del)
|
|
{
|
|
_translator.ThrowError(luaState, "Trying to invoke a not delegate or callable value");
|
|
return 1;
|
|
}
|
|
|
|
luaState.Remove(1);
|
|
|
|
var validDelegate = new MethodCache();
|
|
MethodBase methodDelegate = del.Method;
|
|
var isOk = MatchParameters(luaState, methodDelegate, validDelegate, 0);
|
|
|
|
if (isOk)
|
|
{
|
|
try
|
|
{
|
|
var result = methodDelegate.Invoke(methodDelegate.IsStatic ? null : del.Target, validDelegate.args);
|
|
_translator.Push(luaState, result);
|
|
return 1;
|
|
}
|
|
catch (TargetInvocationException e)
|
|
{
|
|
// Failure of method invocation
|
|
if (_translator.interpreter.UseTraceback)
|
|
{
|
|
e.GetBaseException().Data["Traceback"] = _translator.interpreter.GetDebugTraceback();
|
|
}
|
|
|
|
return _translator.Interpreter.SetPendingException(e.GetBaseException());
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
return _translator.Interpreter.SetPendingException(e);
|
|
}
|
|
}
|
|
|
|
_translator.ThrowError(luaState, "Cannot invoke delegate (invalid arguments for " + methodDelegate.Name + ")");
|
|
return 1;
|
|
}
|
|
|
|
/// <summary>
|
|
/// __call metafunction of type references. Searches for and calls
|
|
/// a constructor for the type. Returns nil if the constructor is not
|
|
/// found or if the arguments are invalid. Throws an error if the constructor
|
|
/// generates an exception.
|
|
/// </summary>
|
|
private static int CallConstructor(IntPtr state)
|
|
{
|
|
var luaState = LuaState.FromIntPtr(state);
|
|
var translator = ObjectTranslatorPool.Instance.Find(luaState);
|
|
var instance = translator.MetaFunctionsInstance;
|
|
var result = instance.CallConstructorInternal(luaState);
|
|
return translator.GetObject(luaState, -1) is LuaScriptException ? luaState.Error() : result;
|
|
}
|
|
|
|
private static ConstructorInfo[] ReorderConstructors(ConstructorInfo[] constructors)
|
|
{
|
|
if (constructors.Length < 2)
|
|
{
|
|
return constructors;
|
|
}
|
|
|
|
return constructors
|
|
.GroupBy(c => c.GetParameters().Length)
|
|
.SelectMany(g => g.OrderByDescending(ci => ci.ToString()))
|
|
.ToArray();
|
|
}
|
|
|
|
private int CallConstructorInternal(LuaState luaState)
|
|
{
|
|
if (_translator.GetRawNetObject(luaState, 1) is not ProxyType klass)
|
|
{
|
|
_translator.ThrowError(luaState, "Trying to call constructor on an invalid type reference");
|
|
return 1;
|
|
}
|
|
|
|
var validConstructor = new MethodCache();
|
|
|
|
luaState.Remove(1);
|
|
var constructors = klass.UnderlyingSystemType.GetConstructors();
|
|
constructors = ReorderConstructors(constructors);
|
|
foreach (var constructor in constructors)
|
|
{
|
|
var isConstructor = MatchParameters(luaState, constructor, validConstructor, 0);
|
|
|
|
if (!isConstructor)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
try
|
|
{
|
|
_translator.Push(luaState, constructor.Invoke(validConstructor.args));
|
|
}
|
|
catch (TargetInvocationException e)
|
|
{
|
|
ThrowError(luaState, e);
|
|
return 1;
|
|
}
|
|
catch
|
|
{
|
|
luaState.PushNil();
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
if (klass.UnderlyingSystemType.IsValueType)
|
|
{
|
|
var numLuaParams = luaState.GetTop();
|
|
if (numLuaParams == 0)
|
|
{
|
|
_translator.Push(luaState, Activator.CreateInstance(klass.UnderlyingSystemType));
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
var constructorName = constructors.Length == 0 ? "unknown" : constructors[0].Name;
|
|
_translator.ThrowError(luaState, $"{klass.UnderlyingSystemType} does not contain constructor({constructorName}) argument match");
|
|
return 1;
|
|
}
|
|
|
|
internal static object GetTargetObject(LuaState luaState, string operation, ObjectTranslator translator)
|
|
{
|
|
Type t;
|
|
var target = translator.GetRawNetObject(luaState, 1);
|
|
if (target != null)
|
|
{
|
|
t = target.GetType();
|
|
if (t.HasMethod(operation))
|
|
{
|
|
return target;
|
|
}
|
|
}
|
|
|
|
target = translator.GetRawNetObject(luaState, 2);
|
|
if (target != null)
|
|
{
|
|
t = target.GetType();
|
|
if (t.HasMethod(operation))
|
|
{
|
|
return target;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
internal static int MatchOperator(LuaState luaState, string operation, ObjectTranslator translator)
|
|
{
|
|
var validOperator = new MethodCache();
|
|
|
|
var target = GetTargetObject(luaState, operation, translator);
|
|
if (target == null)
|
|
{
|
|
translator.ThrowError(luaState, "Cannot call " + operation + " on a nil object");
|
|
return 1;
|
|
}
|
|
|
|
var type = target.GetType();
|
|
var operators = type.GetMethods(operation, BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
|
|
|
|
foreach (var op in operators)
|
|
{
|
|
var isOk = translator.MatchParameters(luaState, op, validOperator, 0);
|
|
|
|
if (!isOk)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
var result = op.Invoke(op.IsStatic ? null : target, validOperator.args);
|
|
translator.Push(luaState, result);
|
|
return 1;
|
|
}
|
|
|
|
translator.ThrowError(luaState, "Cannot call (" + operation + ") on object type " + type.Name);
|
|
return 1;
|
|
}
|
|
|
|
internal static Array TableToArray(LuaState luaState, ExtractValue extractValue, Type paramArrayType, ref int startIndex, int count)
|
|
{
|
|
if (count == 0)
|
|
{
|
|
return Array.CreateInstance(paramArrayType, 0);
|
|
}
|
|
|
|
var luaParamValue = extractValue(luaState, startIndex);
|
|
startIndex++;
|
|
|
|
var paramArray = Array.CreateInstance(paramArrayType, count);
|
|
paramArray.SetValue(luaParamValue, 0);
|
|
for (var i = 1; i < count; i++)
|
|
{
|
|
var value = extractValue(luaState, startIndex);
|
|
paramArray.SetValue(value, i);
|
|
startIndex++;
|
|
}
|
|
|
|
return paramArray;
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// Matches a method against its arguments in the Lua stack. Returns
|
|
/// if the match was successful. It it was also returns the information
|
|
/// necessary to invoke the method.
|
|
/// </summary>
|
|
internal bool MatchParameters(LuaState luaState, MethodBase method, MethodCache methodCache, int skipParam)
|
|
{
|
|
var paramInfo = method.GetParameters();
|
|
var currentLuaParam = 1;
|
|
var nLuaParams = luaState.GetTop() - skipParam;
|
|
var paramList = new List<object>();
|
|
var outList = new List<int>();
|
|
var argTypes = new List<MethodArgs>();
|
|
|
|
foreach (var currentNetParam in paramInfo)
|
|
{
|
|
if (!currentNetParam.IsIn && currentNetParam.IsOut) // Skips out params
|
|
{
|
|
paramList.Add(null);
|
|
outList.Add(paramList.Count - 1);
|
|
continue; // Type does not match, ignore if the parameter is optional
|
|
}
|
|
|
|
if (IsParamsArray(luaState, currentLuaParam, currentNetParam, out var extractValue))
|
|
{
|
|
var count = nLuaParams - currentLuaParam + 1;
|
|
var paramArrayType = currentNetParam.ParameterType.GetElementType();
|
|
|
|
var paramArray = TableToArray(luaState, extractValue, paramArrayType, ref currentLuaParam, count);
|
|
paramList.Add(paramArray);
|
|
|
|
var index = paramList.LastIndexOf(paramArray);
|
|
var methodArg = new MethodArgs
|
|
{
|
|
Index = index,
|
|
ExtractValue = extractValue,
|
|
IsParamsArray = true,
|
|
ParameterType = paramArrayType
|
|
};
|
|
|
|
argTypes.Add(methodArg);
|
|
continue;
|
|
}
|
|
|
|
if (currentLuaParam > nLuaParams)
|
|
{
|
|
// Adds optional parameters
|
|
if (!currentNetParam.IsOptional)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
paramList.Add(currentNetParam.DefaultValue);
|
|
continue;
|
|
}
|
|
|
|
if (IsTypeCorrect(luaState, currentLuaParam, currentNetParam, out extractValue))
|
|
{
|
|
// Type checking
|
|
var value = extractValue(luaState, currentLuaParam);
|
|
paramList.Add(value);
|
|
|
|
var index = paramList.Count - 1;
|
|
var methodArg = new MethodArgs
|
|
{
|
|
Index = index,
|
|
ExtractValue = extractValue,
|
|
ParameterType = currentNetParam.ParameterType
|
|
};
|
|
|
|
argTypes.Add(methodArg);
|
|
|
|
if (currentNetParam.ParameterType.IsByRef)
|
|
{
|
|
outList.Add(index);
|
|
}
|
|
|
|
currentLuaParam++;
|
|
continue;
|
|
}
|
|
|
|
if (currentNetParam.IsOptional)
|
|
{
|
|
paramList.Add(currentNetParam.DefaultValue);
|
|
continue;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
if (currentLuaParam != nLuaParams + 1) // Number of parameters does not match
|
|
{
|
|
return false;
|
|
}
|
|
|
|
methodCache.args = paramList.ToArray();
|
|
methodCache.CachedMethod = method;
|
|
methodCache.outList = outList.ToArray();
|
|
methodCache.argTypes = argTypes.ToArray();
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the type is set and assigns the extract value
|
|
/// </summary>
|
|
/// <param name="luaState"></param>
|
|
/// <param name="currentLuaParam"></param>
|
|
/// <param name="currentNetParam"></param>
|
|
/// <param name="extractValue"></param>
|
|
/// <returns></returns>
|
|
private bool IsTypeCorrect(LuaState luaState, int currentLuaParam, ParameterInfo currentNetParam, out ExtractValue extractValue)
|
|
{
|
|
extractValue = _translator.typeChecker.CheckLuaType(luaState, currentLuaParam, currentNetParam.ParameterType);
|
|
return extractValue != null;
|
|
}
|
|
|
|
private bool IsParamsArray(LuaState luaState, int currentLuaParam, ParameterInfo currentNetParam, out ExtractValue extractValue)
|
|
{
|
|
extractValue = null;
|
|
|
|
if (!currentNetParam.GetCustomAttributes(typeof(ParamArrayAttribute), false).Any())
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var paramElementType = currentNetParam.ParameterType.GetElementType();
|
|
extractValue = _translator.typeChecker.CheckLuaType(luaState, currentLuaParam, paramElementType);
|
|
return extractValue != null;
|
|
}
|
|
}
|
|
}
|