, s, dt, tzd);
Poco::Timestamp ts = dt.timestamp();
Poco::LocalDateTime ldt(tzd, dt);
bool ok = DateTimeParser::tryParse("2006-10-22", dt, tzd);
ok = DateTimeParser::tryParse("%e.%n.%Y", "22.10.2006", dt, tzd);
return 0;
}
8. Stopwatch类
Stopwatch用来测量时间差值，精度为微秒.下面是其定义：
[cpp]
class Foundation_API Stopwatch
/// A simple facility to measure time intervals
/// with microsecond resolution.
///
/// Note that Stopwatch is based on the Timestamp
/// class. Therefore, if during a Stopwatch run,
/// the system time is changed, the measured time
/// will not be correct.
{
public:
Stopwatch();
~Stopwatch();
void start();
/// Starts (or restarts) the stopwatch.
void stop();
/// Stops or pauses the stopwatch.
void reset();
/// Resets the stopwatch.
void restart();
/// Resets and starts the stopwatch.
Timestamp::TimeDiff elapsed() const;
/// Returns the elapsed time in microseconds
/// since the stopwatch started.
int elapsedSeconds() const;
/// Returns the number of seconds elapsed
/// since the stopwatch started.
static Timestamp::Timeva l resolution();
/// Returns the resolution of the stopwatch.
private:
Stopwatch(const Stopwatch&);
Stopwatch& operator = (const Stopwatch&);
Timestamp _start;
Timestamp::TimeDiff _elapsed;
bool _running;
};
class Foundation_API Stopwatch
/// A simple facility to measure time intervals
/// with microsecond resolution.
///
/// Note that Stopwatch is based on the Timestamp
/// class. Therefore, if during a Stopwatch run,
/// the system time is changed, the measured time
/// will not be correct.
{
public:
Stopwatch();
~Stopwatch();
void start();
/// Starts (or restarts) the stopwatch.
void stop();
/// Stops or pauses the stopwatch.
void reset();
/// Resets the stopwatch.
void restart();
/// Resets and starts the stopwatch.
Timestamp::TimeDiff elapsed() const;
/// Returns the elapsed time in microseconds
/// since the stopwatch started.
int elapsedSeconds() const;
/// Returns the number of seconds elapsed
/// since the stopwatch started.
static Timestamp::Timeva l resolution();
/// Returns the resolution of the stopwatch.
private:
Stopwatch(const Stopwatch&);
Stopwatch& operator = (const Stopwatch&);
Timestamp _start;
Timestamp::TimeDiff _elapsed;
bool _running;
};