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#ifndef INCLUDED_BOBCAT_CLOCKTYPES_
#define INCLUDED_BOBCAT_CLOCKTYPES_
#include <chrono>
// assignning a later value to an earlier value is OK
// (minutes min = 1h -> min = 60
//
// nanoseconds duration<int64_t, nano> 1ns
// microseconds duration<int64_t, micro> 1us
// milliseconds duration<int64_t, milli> 1ms
// seconds duration<int64_t> 1s
// minutes duration<int64_t, ratio<60>> 1min
// hours duration<int64_t, ratio<3600>> 1h
//
// members: count()
// static members: zero(), min(), max()
//
// Duration types: =, -, +(=) -(=)
namespace FBB
{
using nanoseconds = std::chrono::nanoseconds;
using microseconds = std::chrono::microseconds;
using milliseconds = std::chrono::milliseconds;
using seconds = std::chrono::seconds;
using minutes = std::chrono::minutes;
using hours = std::chrono::hours;
template <typename Dest, typename Src> // less precise to more precise
Dest toDuration(Src const &src);
template <typename Dest, typename Src>
auto toClock(Src const &src);
template <typename Dest, typename Src>
double toDouble(Src const &src);
struct ClockTypes
{
using Duration = std::chrono::duration<int64_t, std::nano>;
using Period = Duration::period;
using DenType = decltype(Period::den);
using NumType = decltype(Period::num);
static Period period(); // .f
static DenType den(); // .f
static NumType num(); // .f
static Duration zero(); // .f
template <typename TimePoint>
static Duration elapsed(TimePoint const &tp);
template <typename TimePoint>
static size_t count(TimePoint const &tp);
};
#include "clocktypes.f"
} // FBB
#endif
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