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Tag Archives: C++20
C++20 Coroutine Iterators
Associate Instructor at Feabhas Ltd
An independent IT trainer Martin has over 40 years academic and commercial experience in open systems software engineering. He has worked with a range of technologies from real time process controllers, through compilers, to large scale parallel processing systems; and across multiple sectors including industrial systems, semi-conductor manufacturing, telecomms, banking, MoD, and government.
Latest posts by Martin Bond (see all)
- CMake Presets - August 1, 2023
- C++20 Coroutine Iterators - September 23, 2021
- C++20 Coroutines - September 16, 2021
In my first blog post about C++20 Coroutines I introduced the concepts behind a synchronous or generator style coroutine and developed a template class to support coroutines for any data type.
In this post I’ll add an iterator to the template to support the range-for loop and iterative algorithms. You may want to review that post before reading this one but the following code should act as a reminder about how to write and use a coroutine to read two floating […]
C++20 Coroutines
Associate Instructor at Feabhas Ltd
An independent IT trainer Martin has over 40 years academic and commercial experience in open systems software engineering. He has worked with a range of technologies from real time process controllers, through compilers, to large scale parallel processing systems; and across multiple sectors including industrial systems, semi-conductor manufacturing, telecomms, banking, MoD, and government.
Latest posts by Martin Bond (see all)
- CMake Presets - August 1, 2023
- C++20 Coroutine Iterators - September 23, 2021
- C++20 Coroutines - September 16, 2021
C++20 Coroutines
There seems to be a lot of confusion around the implementation of C++20 coroutines, which I think is due to the draft technical specification for C++20 stating that coroutines are a work in progress so we can’t expect full compiler and library support at this point in time.
A lot of the problems probably arise from the lack of official documentation about working with coroutines. We have been given C++ syntax support for coroutines (the co_yield and co_return) but without […]
C++20 modules with GCC11
Director at Feabhas Limited
Co-Founder and Director of Feabhas since 1995.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.
Latest posts by Niall Cooling (see all)
- Navigating Memory in C++: A Guide to Using std::uintptr_t for Address Handling - February 22, 2024
- Embedded Expertise: Beyond Fixed-Size Integers; Exploring Fast and Least Types - January 15, 2024
- Disassembling a Cortex-M raw binary file with Ghidra - December 20, 2022
Introduction
One of the headline changes of the C++20 standard is the inclusion of modules. Modules promise to significantly change the structure of C++ codebases and possibly signal headers’ ultimate demise (but probably not in my lifetime). It also opens the door to potentially have a unified build system and package manager, similar to Rust’s Cargo package manager; though I imaging standardising a unified build system would be one bloody battle.
Pre-C++20 builds
If you want to start a heated debate on any […]
Contract killing (in Modern C++)
Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
If you work in high-integrity or safety-critical software then you have a duty-of-care to:
Ensure your code does what it should
Ensure your code doesn’t do what it’s not supposed to.
Moreover, you’re typically required to both demonstrate and document how you’ve achieved this duty-of-care. Typical mechanisms for demonstrating compliance include unit testing and static analysis; documentation usually includes function specifications and test results. The amount of testing, static analysis and documentation you (have to) do depends on the integrity level of your […]
Posted in C/C++ Programming
Tagged assert, attributes, C++11, C++14, C++17, C++20, C++2a, Contracts, deprecated, ensures, expects, maybe_unused, Modern C++, nodiscard, noreturn
3 Comments
Thanks for the memory (allocator)
Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
One of the design goals of Modern C++ is to find new ways – better, more effective – of doing things we could already do in C++. Some might argue this is one of the more frustrating aspects of Modern C++ – if it works, don’t fix it (alternatively: why use lightbulbs when we have perfectly good candles?!)
This time we’ll look at a new aspect of Modern C++: the Allocator model for dynamic containers. This is currently experimental, but has […]
A brief introduction to Concepts – Part 2
Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
In part 1 of this article we looked at adding requirements to parameters in template code to improve the diagnostic ability of the compiler. (I’d recommend reading this article first, if you haven’t already)
Previously, we looked at a simple example of adding a small number of requirements on a template parameter to introduce the syntax and semantics. In reality, the constraints imposed on a template parameter could consist of any combination of
Type traits
Required type aliases
Required member attributes
Required member functions
Explicitly listing […]
Posted in C/C++ Programming
Tagged C++, C++20, C++2a, concepts, generic programming, Modern C++, requires, Templates
4 Comments
A brief introduction to Concepts – Part 1
Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
He specialises in C++, UML, software modelling, Systems Engineering and process development.
Latest posts by Glennan Carnie (see all)
- Practice makes perfect, part 3 – Idiomatic kata - February 27, 2020
- Practice makes perfect, part 2– foundation kata - February 13, 2020
- Practice makes perfect, part 1 – Code kata - January 30, 2020
Templates are an extremely powerful – and terrifying – element of C++ programs. I say “terrifying” – not because templates are particularly hard to use (normally), or even particularly complex to write (normally) – but because when things go wrong the compiler’s output is a tsunami of techno-word-salad that can overwhelm even the experienced programmer.
The problem with generic code is that it isn’t completely generic. That is, generic code cannot be expected to work on every possible type we could […]
Posted in C/C++ Programming
Tagged C++, C++20, C++2a, concepts, generic programming, Modern C++, requires, Templates
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