A Physical Units Library For the Next C++
summary
mp-units is a header-only C++20 library (release 0.6.0, available on Conan and Compiler Explorer) that encodes units as types to guarantee compile-time safety and human-friendly errors, supports SI/FPS/CGS and custom systems, and uses concepts, class-type NTTPs and quantity_cast for zero-overhead conversions. Benchmarks show fewer instructions than naive double code and often one division instead of extra converts, comparing favorably to Boost.Units and Nick Holthaus’s units. It prints formatted units, works with vector/matrix reps, and targets standardization (GCC10+/MSVC16.7).
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chapters (6)
- 0:00Introduction to physical units
- 12:50Strong interfaces in the library
- 27:41Runtime performance comparison
- 39:21Framework basics and concepts
- 53:11C++20 concepts benefits
- 1:01:21Environment compatibility and next steps
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