我试图发出一个实例化System.Lazy的方法,但在行newobj instance void class [mscorlib]System.Lazy`1<class Example.ExpensiveType>::.ctor(class [mscorlib]System.Func`1<class Example.ExpensiveType>)
时失败,并出现PEVerify错误"Invalid token"。
在使用ILDasm查看其他地方时,我发现正确的调用应该是这样的:
newobj instance void class [mscorlib]System.Lazy`1<class Example.IHeater>::.ctor(class [mscorlib]System.Func`1<!0>)
很遗憾,我不知道如何使用Mono.Cecil API来复现这个问题。有人可以帮忙处理泛型吗?
到目前为止,这是我拥有的:
var get = new MethodDefinition(
"Get",
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.Virtual,
ModuleDefinition.TypeSystem.Object);
var funcType = new GenericInstanceType(ImportedTypes.FuncOfT);
funcType.GenericArguments.Add(lazyElementType);
var funcTypeCtor = new MethodReference(".ctor", ModuleDefinition.TypeSystem.Void, funcType);
funcTypeCtor.Parameters.Add(new ParameterDefinition(ModuleDefinition.TypeSystem.Object));
funcTypeCtor.Parameters.Add(new ParameterDefinition(ModuleDefinition.TypeSystem.IntPtr));
funcTypeCtor.HasThis = true;
funcTypeCtor = ModuleDefinition.Import(funcTypeCtor);
var lazyTypeCtor = new MethodReference(".ctor", ModuleDefinition.TypeSystem.Void, lazyType);
var parameterDefinition = new ParameterDefinition(funcType);
lazyTypeCtor.Parameters.Add(parameterDefinition);
lazyTypeCtor.HasThis = true;
lazyTypeCtor = ModuleDefinition.Import(lazyTypeCtor);
il = get.Body.GetILProcessor();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldftn, getTypedValue);
il.Emit(OpCodes.Newobj, funcTypeCtor);
il.Emit(OpCodes.Newobj, lazyTypeCtor); // This leads to the invalid token
il.Emit(OpCodes.Ret);
lazyBinding.Methods.Add(get);
任何帮助都将不胜感激——我束手无策!