sm::cem

constexpr maths functions 

#include <sm/constexpr_math>

Header file: <sm/constexpr_math>.

Table of Contents

Summary

constexpr capable basic maths functions that will work in your C++20 and C++23 programs. Eventually, these functions will all be superceded by C++26 functions in the std namespace.

This file is about 700 lines of cherry-picked code from Keith O’Hara’s GCE Math library (thanks Keith!).

Usage

Use the functions just like their std:: equivalents, but optionally in your constexpr functions.

The functions provided are:

  • sm::cem::abs maps to std::abs
  • sm::cem::isinf maps to std::isinf
  • sm::cem::isfinite maps to std::isfinite
  • sm::cem::sqrt maps to std::sqrt
  • sm::cem::pow maps to std::pow
  • sm::cem::exp maps to std::exp
  • sm::cem::log maps to std::log
  • sm::cem::log10 maps to std::log10
  • sm::cem::signbit maps to std::signbit
  • sm::cem::sgn is the signum function (bonus)
  • sm::cem::ceil maps to std::ceil (already constexpr in C++23)
  • sm::cem::floor maps to std::floor (already constexpr in C++23)
  • sm::cem::trunc maps to std::trunc (already constexpr in C++23)
  • sm::cem::round maps to std::round (already constexpr in C++23)
  • sm::cem::sin maps to std::sin
  • sm::cem::cos maps to std::cos
  • sm::cem::tan maps to std::tan
  • sm::cem::asin maps to std::asin
  • sm::cem::acos maps to std::acos
  • sm::cem::atan maps to std::atan
  • sm::cem::atan2 maps to std::atan2