How-to guides

This section provides detailed instructions for various common tasks that come up in the course of using the library. Here’s a summary of what you’ll find.

• Quantity template parameters. How to use a Quantity value as a template parameter, emulating C++20’s expanded support for new kinds of “non-type template parameters” (NTTPs).

• New units. How to add a new unit of measure that the library doesn’t include.

• New constants. How to add a custom physical constant.

• New dimensions. How to add a new, independent base dimension.

• Forward declarations. How to use the forward declarations provided by the library.

• Inter-library Interoperation. How to set up automatic correspondence between equivalent types in Au and any other units library.

  • nholthaus/units. How to use the ready-made interoperability with the nholthaus/units library.