Strengthening Firmware – Practical C++ Error Handling Methods
To ensure the proper functioning of firmware, we must handle errors from vendor-specific code, libraries that we are using in a project, and our own code. Error codes are standard error-handling mechanisms in C, and they are also used in C++. However, C++ provides us with other tools, most notably exceptions that are often avoided in embedded projects due to the large binary footprint and non-determinism. Still, we will discuss exceptions in C++ in this chapter to show their benefits in the error-handling process.
Besides exceptions, C++ offers more options for error handling that will also be discussed in this chapter. The goal of this chapter is to understand potential issues with error codes and see how to mitigate them in C++.
In this chapter, we’re going to cover the following main topics:
- Error codes and asserts
- Exceptions
std:: optionalandstd::expected
