提升日期时间捕获异常(boost date time catching exception)

提升日期时间捕获异常(boost date time catching exception)

我正在尝试使用boost date_time检查日期是否有效。 文档说如果日期无效，它将抛出异常。 现在我一直在尝试使用try-catch如果日期确实无效但不知何故我的程序仍被抛出并停止..

简单的测试代码：

#include "boost/date_time/gregorian/gregorian.hpp" #include <iostream> int main() { int year = 2013; int month = 1; int day = 50; try { boost::gregorian::date d(year, month, day); throw 20; } catch (int e) { std::cout << "error! date does not excist!" << std::endl; std::cout << "error no: " << e << std::endl; } return 0; }

最后一个问题：使用date_time验证日期的正确方法是什么？

I'm trying to check if a date is valid using boost date_time. The documentation says it will throw an exception if the date is invalid. Now I've been trying to use try-catch if the date is indeed invalid but somehow my program still gets thrown out and stops..

simple test code:

#include "boost/date_time/gregorian/gregorian.hpp" #include <iostream> int main() { int year = 2013; int month = 1; int day = 50; try { boost::gregorian::date d(year, month, day); throw 20; } catch (int e) { std::cout << "error! date does not excist!" << std::endl; std::cout << "error no: " << e << std::endl; } return 0; }

final question: what is the proper way using date_time to validate a date?

最满意答案

boost::gregorian::date在日，月或年超出范围时抛出std::out_of_range类型异常。 catch块捕获int类型的异常。 您需要使用类型为std::out_of_range的catch块来捕获特定的异常。

此外，您不需要在try块中使用throw(20)语句。

boost::gregorian::date throws std::out_of_range type exceptions when day, month or year are out of range. Your catch block catches exception of int type. You need to use a catch block with type std::out_of_range to catch the specific exception.

Also, there is no need to use a throw(20) statement in your try block.