private static CreateInstanceMethod GenerateCreateInstanceMethod(ConstructorInfo constructor) { var objectType = constructor.DeclaringType; DynamicMethod method = new DynamicMethod(string.Format("CreateInstanceByConstructor_{0}", Guid.NewGuid().ToString("n")) , typeof(object) , new Type[] { typeof(object[]) } , true); MethodGenerator g = new MethodGenerator(method); //以下代码把数组参数转成,new T(arg0,arg1)的形式 var result = g.Declare(objectType, "result"); var objs = g.Declare <object[]>(); g.Assign(objs, () => { g.LoadParameter(0); }); g.Assign(result, () => { g.NewObject(constructor, () => { var index = g.Declare <int>(); var prms = constructor.GetParameters(); for (var i = 0; i < prms.Length; i++) { g.Assign(index, () => { g.Load(i); }); g.LoadElement(objs, index); g.Cast(prms[i].ParameterType); } }); }); g.LoadVariable("result"); g.Cast(typeof(object)); g.Return(); var invoke = method.CreateDelegate(typeof(Func <object[], object>)); return(new CreateInstanceMethod(invoke)); }
private IrisType ProcessArrayAccess(FilePosition fp, Symbol symbol, SymbolLoadMode mode) { IrisType symbolType = symbol.Type; IrisType resultType = IrisType.Invalid; if (symbolType != IrisType.Invalid) { if (!symbolType.IsArray) { AddError(fp, string.Format("Symbol '{0}' is not an array, but is being used as an array.", _lexeme)); } else { EmitLoadSymbol(symbol, SymbolLoadMode.Dereference); resultType = symbol.Type.GetElementType(); } } FilePosition indexerPosition = _lexer.TokenStartPosition; IrisType indexerType = ParseExpression(); if (indexerType != IrisType.Integer) { AddError(indexerPosition, "Expecting integer value as array index."); } Expect(Token.ChrCloseBracket); if (resultType != IrisType.Invalid) { if (mode == SymbolLoadMode.ElementAddress) { MethodGenerator.LoadElementAddress(resultType); resultType = resultType.MakeByRefType(); } else if (mode == SymbolLoadMode.Element) { MethodGenerator.LoadElement(resultType); } } return(resultType); }