How do I use C++20 modules instead of headers?

With the introduction of C++20, modules provide a modern alternative to traditional header files, enabling better encapsulation and faster compilation times. Instead of including headers, you define modules that can be imported by other translation units, thus promoting better code organization and reducing dependencies.

Basic Structure of a C++20 Module

Here’s a simple example of how to define and use a module in C++20:


        // my_module.cppm
        export module my_module;

        export int add(int a, int b) {
            return a + b;
        }


        // main.cpp
        import my_module;

        #include 

        int main() {
            std::cout << "Sum: " << add(5, 3) << std::endl;
            return 0;
        }

In this example, we define a module named my_module that contains a simple function add(). We can then import this module in our main program and use its functionality directly.

How do I use C++20 modules instead of headers?

Basic Structure of a C++20 Module

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How do I use C++20 modules instead of headers?

Basic Structure of a C++20 Module

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