private static Func MakeFastPropertyGetter()

in src/WebJobs.Extensions.Http/PropertyHelper.cs [210:251]
31 lines of code
2 McCabe index (conditional complexity)

        private static Func<object, object> MakeFastPropertyGetter(
            PropertyInfo propertyInfo,
            MethodInfo propertyGetterWrapperMethod,
            MethodInfo propertyGetterByRefWrapperMethod)
        {
            Debug.Assert(propertyInfo != null);

            // Must be a generic method with a Func<,> parameter
            Debug.Assert(propertyGetterWrapperMethod != null);
            Debug.Assert(propertyGetterWrapperMethod.IsGenericMethodDefinition);
            Debug.Assert(propertyGetterWrapperMethod.GetParameters().Length == 2);

            // Must be a generic method with a ByRefFunc<,> parameter
            Debug.Assert(propertyGetterByRefWrapperMethod != null);
            Debug.Assert(propertyGetterByRefWrapperMethod.IsGenericMethodDefinition);
            Debug.Assert(propertyGetterByRefWrapperMethod.GetParameters().Length == 2);

            var getMethod = propertyInfo.GetMethod;
            Debug.Assert(getMethod != null);
            Debug.Assert(!getMethod.IsStatic);
            Debug.Assert(getMethod.GetParameters().Length == 0);

            // Instance methods in the CLR can be turned into static methods where the first parameter
            // is open over "target". This parameter is always passed by reference, so we have a code
            // path for value types and a code path for reference types.
            if (getMethod.DeclaringType.GetTypeInfo().IsValueType)
            {
                // Create a delegate (ref TDeclaringType) -> TValue
                return MakeFastPropertyGetter(
                    typeof(ByRefFunc<,>),
                    getMethod,
                    propertyGetterByRefWrapperMethod);
            }
            else
            {
                // Create a delegate TDeclaringType -> TValue
                return MakeFastPropertyGetter(
                    typeof(Func<,>),
                    getMethod,
                    propertyGetterWrapperMethod);
            }
        }