![]() The idea behind header units is that most header files are sufficiently self-contained so that instead of including them they can be imported as stand-alone modules. In order to make the transition easier, C++20 provides a way to use existing header files as modules through header units. Making the switch to named modules in your projects could be a daunting task. We recommend going through the “Named modules tutorial in C++” to learn more about using named modules in Visual C++. ![]() Moreover, there’s no need for the compiler to parse the source code of the module each time it is imported, which has the potential to improve compilation times. This means that preprocessor definitions in the translation unit that imports a module do not affect the imported module. The main benefit of the new approach is that modules are compiled independently of the code that imports them. This interface description in the binary format is used by the compiler to import a module into another translation unit. Additionally, there can be one or several module implementation units.Īfter you build a module, the compiler produces a special metadata file that uses the IFC format and describes the public interface of the module. A named module defines its interface through module interface units, which by convention use the. ReSharper C++ supports both of the main ways to introduce modules into your codebase: named modules and header units. Let’s take a closer look at how ReSharper C++ helps you work with C++20 modules. You can download the EAP builds from our website or via the Toolbox App.
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