Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
namespace boost { namespace math { template < typename IntegerType > class gcd_evaluator; template < typename IntegerType > class lcm_evaluator; template < typename IntegerType > IntegerType gcd( IntegerType const &a, IntegerType const &b ); template < typename IntegerType > IntegerType lcm( IntegerType const &a, IntegerType const &b ); typedef see-below static_gcd_type; template < static_gcd_type Value1, static_gcd_type Value2 > struct static_gcd; template < static_gcd_type Value1, static_gcd_type Value2 > struct static_lcm; } }