Archive for category: Blog

RainerGrimmSmall

Which pdf bundle do you want? Make your choice!

August 23, 2021

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Now, it's time to choose the next pdf bundle? Get all the material to your chosen topic. I…

templates

More about Variadic Templates …

August 13, 2021

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There is a lot of power in the strange-looking three dots that are heavily used in the Standard Template…

templates

Variadic Templates or the Power of Three Dots

August 6, 2021

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A variadic template is a template that can have an arbitrary number of template parameters. If you see…

templatesInstantiation

Template Instantiation

July 29, 2021

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Template instantiation is creating a concrete function or a concrete class out of a function or class…

roth cleancpp20 cover

And the Winners for the Five Vouchers for Stephan’s Book “Clean C++20” are

July 28, 2021

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I'm happy to present the five winners in this post including their answers. I was happy…

timelineParallelSTL

Performance of the Parallel STL Algorithms

July 22, 2021

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In my last post, "Parallel Algorithms of the STL with the GCC Compiler", I presented the necessary theory…

timelineParallelSTL

Parallel Algorithms of the STL with the GCC Compiler

July 16, 2021

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GCC supports my favorite C++17 feature: the Standard Template Library (STL) parallel algorithms. I recognized…

roth cleancpp20 cover

Five Vouchers for Stephan Roth’s Book “Clean C++20” to Win

July 13, 2021

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I give away five vouchers for Stephan Roth's book "Clean C++20", sponsored by the book's publisher Apress. There…

TemplateSpecialization

Full Specialization of Function Templates

July 9, 2021

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As you may know from my previous post, Template Specialization, a function template can only be full…

TemplateSpecialization

Template Specialization – More Details About Class Templates

June 29, 2021

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After I presented in my last post Template Specialization, the basics about template specialization,…

Latest news

Small Safety Improvements in the C++ 26 Core LanguageSeptember 22, 2025 - 10:16 am
Safety is an important concern in C++26. Contracts are probably the most important feature for safety. But C++26 has much more to offer. Today, I would like to introduce three small but important improvements in C++26 that solve typical safety issues in C++. Disallow binding a returned reference to a temporary A safety issue can be […]
Contracts: Evaluation SemanticSeptember 8, 2025 - 9:49 am
After briefly presenting the details of contracts in my last article, “Contracts: A Deep Dive“, I would like to take a closer look at the very interesting Evaluation Semantic in today’s article. If a contract assertion occurs, one of the four evaluation semantics is applied: ignore, observe, enforce, or quick-enforce. The table provides an overview […]
Contracts: A Deep DiveAugust 25, 2025 - 9:35 am
I already introduced contracts in the article “Contracts in C++26”. In this article and the next ones, I will dive deeper into the details. In this article, I refer mainly to the excellent proposal “Contracts for C++”. Unfortunately, proposal P2900R14 exceeds 100 pages in length. I will therefore try to summarize the most important points […]
Data-Parallel Types: AlgorithmsAugust 11, 2025 - 8:45 am
The data-parallel types library has four special algorithms for SIMD vectors. The four special algorithms are min, max, minmax, and clamp. min, max, and minmax The two algorithms min and max have in common that they each accept two SIMD vectors and return a SIMD vector. This contains the element-wise minimum or maximum of the […]
Data-Parallel Types: ReductionJuly 28, 2025 - 10:10 am
In this article, I will discuss reduction and mask reduction for data-parallel types. Reduction A reduction reduces the SIMD vector to a single element. The library provides three functions for this purpose: reduce, hmin, and hmax.The following program shows how these functions are used. // reduction.cpp #include <array> #include <experimental/simd> #include <functional> #include <iostream> #include […]
Data-Parallel Types: simd_maskJuly 14, 2025 - 9:16 am
Thanks to simd_mask, conditional execution of operations on data-parallel types is possible. Unfortunately, in my last article, Data-Parallel Types – A First Example, I forgot to introduce one of the new library functions. I will make up for that in this article. Where Expression The new keyword where creates a so-called where expression. This allows […]