private static void GenerateInvokeMethodIl(MethodDefinition method,
Type[] paramTypes,
ParameterInfo[] parameters,
MethodInfo proxyOnGetMethod)
{
var il = method.GetILGenerator();
var argsLocal = il.DeclareLocal(typeof(object[]));
il.Emit(OpCodes.Ldc_I4, paramTypes.Length);
il.Emit(OpCodes.Newarr, typeof(object));
il.Emit(OpCodes.Stloc, argsLocal);
foreach (var param in parameters)
{
il.Emit(OpCodes.Ldloc, argsLocal);
il.Emit(OpCodes.Ldc_I4, param.Position);
il.Emit(OpCodes.Ldarg, param.Position + 1); // +1 since Ldarg0 means this
if (param.ParameterType.IsValueType)
il.Emit(OpCodes.Box, param.ParameterType);
il.Emit(OpCodes.Stelem_Ref);
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(MethodBase).GetMethod("GetCurrentMethod"));
il.Emit(OpCodes.Castclass, typeof(MethodInfo));
//il.Emit(OpCodes.Ldstr, targetMethod.Name);
il.Emit(OpCodes.Ldloc_0);
il.Emit(OpCodes.Callvirt, proxyOnGetMethod);
if (method.ReturnType == typeof(void))
il.Emit(OpCodes.Pop);
else if (method.ReturnType.IsValueType)
il.Emit(OpCodes.Unbox_Any, method.ReturnType);
else if (method.ReturnType != typeof(object))
il.Emit(OpCodes.Castclass, method.ReturnType);
il.Emit(OpCodes.Ret);
}
private static bool BaseTypeHasMatchingPublicMethod(Type baseDef, MethodInfo targetMethod)
{
return baseDef.GetMethods()
.Any(
x =>
x.Name == targetMethod.Name &&
x.ReturnType == targetMethod.ReturnType &&
x.GetParameters()
.Select(y => y.ParameterType)
.SequenceEqual(targetMethod.GetParameters().Select(y => y.ParameterType)));
}
private static void CopyGenericMethodParameters(MethodInfo targetMethod,
MethodDefinition method,
Dictionary<Type, Type> genArgMapping,
Func<Type, Type> typeReplacer)
{
if (targetMethod.IsGenericMethodDefinition)
{
var targetGenArgs = targetMethod.GetGenericArguments();
var items =
method.DefineGenericParameters(targetGenArgs.Select(x => x.Name).ToArray()).Zip(targetGenArgs,
(paramBuilder,
target) =>
new
{
paramBuilder,
target
})
.ToList();
foreach (var arg in items)
{
arg.paramBuilder.SetGenericParameterAttributes(arg.target.GenericParameterAttributes);
genArgMapping[arg.target] = arg.paramBuilder;
}
foreach (var arg in items)
{
IEnumerable<Type> interfaceConstraints =
arg.target.GetGenericParameterConstraints().Select(typeReplacer).ToList();
if (arg.target.BaseType != null)
{
var baseTypeFixed = typeReplacer(arg.target.BaseType);
if (!baseTypeFixed.IsInterface)
arg.paramBuilder.SetBaseTypeConstraint(baseTypeFixed);
else
{
//arg.paramBuilder.SetBaseTypeConstraint(typeof(object));
interfaceConstraints = interfaceConstraints.Append(baseTypeFixed);
}
//if (arg.target.BaseType.IsGenericParameter)
//{
// interfaceConstraints = interfaceConstraints.Except(arg.target.BaseType.GetInterfaces());
//}
}
arg.paramBuilder.SetInterfaceConstraints(interfaceConstraints.ToArray());
}
}
}