Chapter Overview
Explore significant new features introduced in C++20's Standard Template Library. Understand how to use the format library, compile-time constexpr vectors, the spaceship operator for comparisons, concepts for safer templates, and ranges for container views. This lesson prepares you to apply modern C++20 improvements in your projects and codebases.
We'll cover the following...
This chapter concentrates on some of the more compelling features that C++20 adds to the STL. We can use some of these right away. Others may need to wait for implementation in your favorite compiler. There are a lot of new additions to the C++20 standard, far more than we could cover here. We'll cover the additions that are most likely to have long-term impact.
In this chapter, we will cover the following recipes:
- Format text with the new
formatlibrary - Use compile-time vectors and strings with
constexpr - Safely compare integers of different types
- Use the spaceship operator
<=>for three-way comparisons - Easily find feature test macros with the
<version>header - Create safer templates with concepts and constraints
- Avoid re-compiling template libraries with modules
- Create views into containers with ranges
