  HepLib is a C++ Library for computations in High Energy Physics, it works on
top of GiNaC, a well-established C++ library used to perform symbolic
computations. HepLib combines serval well-known packages to get high
efficiency, including Qgraf to generate Feynman aptitudes, FORM to perform
Dirac/Color matrix related computations, and FIRE or KIRA for
integration-by-parts (IBP) reduction. Another core feature of HepLib lies in
the numerical evaluation of master integrals using sector decomposition, which
is a general method widely used in high-order numerical computation and has
been implemented in many public packages in many different languages, and we
present another implementation in the language of C++ with many new features.
We use GiNaC to handle the symbolic operations, and export the corresponding
integrand into an optimized C++ code, that will be compiled internally and
linked dynamically, a customizable numerical integrator is selected to perform
the numerical integration, while the integrand can be evaluated in different
float precisions, including the arbitrary precision supported by MPFR.
