random.h

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#ifndef _BBM_RANDOM_BACKBONE_CONCEPT_H_
#define _BBM_RANDOM_BACKBONE_CONCEPT_H_
 
#include <concepts>
 
/************************************************************************/
/*! \file random.h
 
  \brief Random number generator
*************************************************************************/
 
namespace bbm {
  namespace concepts {
    namespace backbone {
 
      /******************************************************************/
      /*! \brief Concept to check a randum number generator
 
        Each rng contains:
        + typedef type: basis type 
        + type operator(): generates a random number between lower and upper
        *****************************************************************/
      template<typename RNG>
        concept is_rng = requires(RNG& rng)
      {
        typename std::decay_t<RNG>::type;
        { rng() } -> std::same_as<typename std::decay_t<RNG>::type>;
      };
      
    } // end backbone namespace
  } // end concepts namespace
} // end bbm namespace
 
#endif /* _BBM_RANDOM_BACKBONE_CONCEPT_H_ */