C++20 Modules

A detailed overview of C++20 modules - the modern alternative to #include directives. We cover import and export statements, partitions, submodules, how to integrate modules with legacy code, and more.

Ryan McCombe
Updated
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Questions & Answers

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Benefits of C++20 Modules
What are the main benefits of using C++20 modules over traditional #include directives?
Circular Dependencies in Modules
How do you handle circular dependencies when using modules in C++?
Module Interface vs Implementation
Can you explain the difference between a module interface file and an implementation file in C++?
Issues Migrating to Modules
What are some common issues you might face when migrating a large codebase to use C++20 modules?
Performance Benefits of Modules
Are there any performance benefits to using C++20 modules over header files?
Module Partitions vs Submodules
What are module partitions, and how do they differ from submodules?
Templates in Modules
Can you use template classes and functions within C++20 modules?
Header Units
What are header units, and how do they work in C++20?
Mixing import and include
Can you mix #include directives and import statements in the same file?
Handling Third-Party Libraries
How do you handle third-party libraries that do not use C++20 modules?