C++ Stopwatch

stopwatch.hpp

#ifndef STOPWATCH_HPP
#define STOPWATCH_HPP

#include <chrono>

namespace detail {

using namespace std::chrono;
using hrc = high_resolution_clock;

class Stopwatch {
protected:
	hrc::time_point _start, _last_lap;

public:
	void start() {
		_start = hrc::now();
		_last_lap = _start;
	}

	float lap() {
		auto d = duration<float>(hrc::now() - _last_lap);
		_last_lap = hrc::now();
		return d.count();
	}
	
	float reset() {
		auto d = duration<float>(hrc::now() - _start);
		start();
		return d.count();
	}
};

}

using Stopwatch = detail::Stopwatch;

#endif