private Func <object[], object> GetConstructorDelegate(ConstructorInfo constructorInfo)
{
var targetParExp = Expression.Parameter(typeof(object), "s");
var argsParExp = Expression.Parameter(typeof(object[]), "args");
var callExp = InvokerBuilder.BuildMethodCall(constructorInfo, typeof(object), targetParExp, argsParExp);
var lambdaExp = Expression.Lambda(typeof(Func <object[], object>), callExp, argsParExp);
return((Func <object[], object>)lambdaExp.Compile());
/*
* var dm = new DynamicMethod("CreateInstance", typeof(object),
* new Type[] { typeof(object[]) }, constructorInfo.DeclaringType, true);
*
* var parameters = constructorInfo.GetParameters();
* var emiter = new EmitHelper(dm.GetILGenerator());
* emiter.nop
* .For(0, parameters.Length, (e, i) => e.ldarg_1.ldc_i4(i).ldelem_ref
* .Assert(parameters[i].ParameterType.IsValueType,
* e1 => e1.unbox_any(parameters[i].ParameterType),
* e1 => e1.castclass(parameters[i].ParameterType)))
* .newobj(constructorInfo)
* .ret();
*
* return (Func<object[], object>)dm.CreateDelegate(typeof(Func<object[], object>));
*/
}
private static Func <object, object[], object> CreateInvokeDelegate(MethodInfo methodInfo)
{
var targetParExp = Expression.Parameter(typeof(object), "s");
var argsParExp = Expression.Parameter(typeof(object[]), "args");
var callExp = InvokerBuilder.BuildMethodCall(methodInfo, typeof(object), targetParExp, argsParExp);
var lambdaExp = Expression.Lambda(typeof(Func <object, object[], object>), callExp, targetParExp, argsParExp);
return((Func <object, object[], object>)lambdaExp.Compile());
}
private Func <object[], object> InitializeInvoker(ConstructorInfo constructorInfo)
{
var targetParameterExpression = Expression.Parameter(typeof(object), "s");
var argsParameterExpression = Expression.Parameter(typeof(object[]), "args");
var callExpression = InvokerBuilder.BuildMethodCall(constructorInfo, typeof(object), targetParameterExpression, argsParameterExpression);
var lambdaExpression = Expression.Lambda(typeof(Func <object[], object>), callExpression, argsParameterExpression);
var compiled = (Func <object[], object>)lambdaExpression.Compile();
return(compiled);
}