locus.h

Go to the documentation of this file.

 
#if !defined(VITA_LOCUS_H)
#define      VITA_LOCUS_H
 
#include <iostream>
#include <limits>
 
#include "kernel/common.h"
 
namespace vita
{
using index_t = std::size_t;
 
static_assert(sizeof(index_t) <= sizeof(std::size_t),
              "index_t size expected to be <= std::size_t");
static_assert(sizeof(category_t) <= sizeof(std::size_t),
              "category_t size expected to be <= std::size_t");
 
struct locus
{
  index_t       index;
  category_t category;
 
  static constexpr locus npos()
  {
    return {std::numeric_limits<index_t>::max(),
            std::numeric_limits<category_t>::max()};
  }
};
 
inline bool operator==(const locus &l1, const locus &l2)
{
  return l1.index == l2.index && l1.category == l2.category;
}
 
inline bool operator!=(const locus &l1, const locus &l2)
{
  return l1.index != l2.index || l1.category != l2.category;
}
 
inline bool operator<(const locus &l1, const locus &l2)
{
  return l1.index < l2.index ||
         (l1.index == l2.index && l1.category < l2.category);
}
 
inline locus operator+(const locus &l, index_t i)
{
  return {l.index + i, l.category};
}
 
inline std::ostream &operator<<(std::ostream &s, const locus &l)
{
  return s << '[' << l.index << ',' << l.category << ']';
}
}  // namespace vita
 
#endif  // include guard