readme.md

Real-Time-C++ - Code Snippets

These are the code snippets from the chapters of the book C.M. Kormanyos, Real-Time C++: Efficient Object-Oriented and Template Microcontroller Programming, Fourth Edition (Springer, Heidelberg, 2021) ISBN 9783662629956.

Summary of the Code Snippets

The code snippets are organized according to chapter and section.

Each code snippet in intended to be a complete standalone C++ project that compiles and runs on a PC host using the host's compiler system such as MSVC on Win* or GCC on *nix.

The code snippets correspond to individual code samples in the book but extend these in rudimentary ways to include a main subroutine and usually some sensible short messages to the output console.

Consider, for instance, the code snippet chapter03_11-001_array.cpp.

// chapter03_11-001_array.cpp

#include <array>
#include <cstdint>
#include <cstddef>
#include <format>
#include <iostream>
#include <string>

using login_key_array_type = std::array<std::uint8_t, std::size_t { UINT8_C(3) }>;

// A login key stored in an std::array.

constexpr login_key_array_type
  login_key
  {
    UINT8_C(0x01),
    UINT8_C(0x02),
    UINT8_C(0x03)
  };

auto main() -> int
{
  std::string str_login_key { "login_key is: " };

  for(const auto& value : login_key)
  {
    str_login_key += std::format("{:#x},", value);
  }

  std::cout << str_login_key << std::endl;
}

This code snippet portrays a straightforward use of std::array. An array named login_key is created and initialized with the data bytes 0x1,0x2,0x3. The bytes are printed to the output console. The formatted output is collected in an standard library std::string object with help from std::format.

The expected output message text is

login_key is: 0x1,0x2,0x3,

Testing and CI

The code snippets have been tested locally on GCC, clang and MSVC. CI for the code snippets runs with GCC and clang on *nix using (at the moment) build-only.

Try it at godbolt

Use this [short link]https://godbolt.org/z/9MYejn7cT) to godbolt in order to further explore this program.

In the afore-mentioned link, the file chapter03_11-001_array.cpp is, in fact, compiled with a modern GCC host-compiler.

This is an example of compiling, linking and running on a PC host.

To clearly reiterate: The file is actually compiled, linked and also executed. This provides keen insight into both this particular code-snippet as well as potential code and compiler exploration in your own domain(s).

In todays fast-paced, modern coding world, it is fun, educational, exciting and effective to try out and share code-snippets at godbolt