## C++: Template Meta-Programming 2.0

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I was amazed after I had converted only the first few portions of the TypeList from the C++98 implementation to Modern C++. I have decided to convert my Alchemy API to use Modern C++ in order to truly learn the nuances by application of acquired knowledge. The code of these meta-programs are very elegant and completely readable. This really does feel like a new language, and an entirely new version of meta-programming.

The elegance enabled by the new constructs will allow me to present a complete TypeList implementation for Modern C++ in this entry.

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## C++: Rvalue References

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Rvalue references were introduced with C++11, and they are used to implement move semantics and perfect-forwarding. Both of these techniques are ways to eliminate copies of data parameters for efficiency. There is much confusion around this new feature that uses the && operator, because its meaning is often based on the context it is used. It is important to understand the subtleties around rvalue references in order for them to be effective. This entry will teach you how to use the rvalue reference with plenty of live-demonstrations.

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## Why Does a CS Degree Require So Much Math?

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Over the years I have heard this question or criticism many times:

Why is so much math required for a computer science degree?

I never questioned the amount of math that was required to earn my degree. I enjoy learning, especially math and science. Although, a few of the classes felt like punishment. I remember the latter part of the semester in Probability was especially difficult at the time. Possibly because I was challenged with a new way of thinking that is required for these problems, which can be counter-intuitive.

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## Accidental Complexity

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Accidental complexity is the entropy that exists in your system that is possible to eliminate. The opposite of this is essential complexity; the parts of a system that are required and cannot be simplified. These two concepts were discussed by Fred Brooks in his essay No Silver Bullet -- Essence and Accidents of Software Engineering.. Many systems today are extremely complex, and any effort that can be done to eliminate complexity, should be.

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## C++: auto

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The keyword auto has been given a new behavior since the C++11 Standard was ratified. Instantly I could appreciate the value of its new function when I considered things like declaring an iterator for a container. However, I was skeptical of any value that auto could provide for general purpose use.

Now that I have had a chance to study this new keyword I believe that it is quite a valuable addition to Modern C++. While there are situations that could still cause some grief, they are not difficult to detect, and the solutions to the problem are straight-forward to apply

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There are many different philosophies with regards to how source code should be commented. The gamut of these philosophies range from "Every single statement must have a comment." to "Comments are useless; avoid them at all costs!" I am not even going to attempt to explain the disparity of range. However, I will attempt to address and suggest potential solutions the reasons that are often cited for these extreme approaches to commenting code.

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## Preparing to Know Modern C++

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"To know and not do, is to not yet know"

This Zen mantra has been the signature that I have placed at the end of every entry since I started this blog. This mantra is the impetus of this entry, my decision to know how to use Modern C++.

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## When are we gonna learn?

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As you gain expertise you begin to realize how little you actually know and understand. I have found this to be true of most skills. It’s easy to fall into the trap where you believe that you continue to grow your expertise each year, and thus have less and less to learn. Read on and I will demonstrate what I mean.

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## Unit Testing a Singleton in C++

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I have written about the Singleton[^] before. As a quick review from what I previously stated, I don't think the Singleton is misunderstood, I think it is the only software design pattern that most people do understand. Those that call the Singleton an anti-pattern believe that it is overused. It's simple enough in concept compared to the other patterns, that itself may explain why it is used so often. Another criticism that I hear is that it is difficult to unit-test, or at least unit-test properly with a fresh fixture for each test. No, it's not, and I will demonstrate how.

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## Alchemy: Benchmarks and Optimizations

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A continuation of a series of blog entries that documents the design and implementation process of a library. The library is called, Network Alchemy[^]. Alchemy performs automated data serialization with compile-time reflection. It is written in C++ using template meta-programming.

Benchmark testing and code profiling is a phase that can often be avoided for the majority of development. That is, if you develop wisely. Selecting appropriate data structures and algorithms for the task at hand. Avoiding pre-mature optimization is about not getting caught up on the minute details before you even have a working system. That doesn’t mean to through out good decision making altogether. Well I have reached the point in Alchemy, where I have a feature-set that is rich enough to make this a useful library. This entry chronicles my discoveries for how well Alchemy performs and the steps I have taken to find and improve the areas where improvement has been required.

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