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Parse date time string with spirit

By , 19 Mar 2008
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Introduction

This article include a sample show how to use boost spirit framework parse a date time string like "1999-01-20T00:01:22".

Background

The XML schema define the date time format like this "2000-01-30T00:10:20+1".

Using the code

First create your parser

struct myparser: public grammar<myparser>
{
  template <typename ScannerT>
  struct definition
  {
    definition(myparser const& self)
    {
      first = int_p[assign(self.date_.year_)] >> "-" >> int_p[assign(self.date_.month_)] 
      >> "-" >> int_p[assign(self.date_.day_)] >> "T" >> int_p[assign(self.date_.hour_)] 
      >> ":" >> int_p[assign(self.date_.minute_)] >> ":" >> int_p[assign(self.date_.second_)] ;
    }
    rule<ScannerT> first;
    rule<ScannerT> const&
    start() const { return first; }
  };
  myparser(date& d):date_(d){};
  date& date_;
};        

Then invoke the parser:

bool parse_date(char const* str, date& d)
{
  myparser p(d);
  return parse(str, p).full;
}      

Points of Interest

This parser can be improved to support more flexible format

History

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

ZhengPing Wang
Software Developer (Senior)
China China
Programmer live in china.
Interesting with knowledge management.
 
My home page: http://herosys.net
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Comments and Discussions

 
QuestionOverkill? PinmemberPatLeCat20-Mar-08 3:05 
AnswerRe: Overkill? PinmemberComaWhite8616-Nov-08 10:33 

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