| Home | Libraries | People | FAQ | More

## Class value_semantic_codecvt_helper<char>

boost::program_options::value_semantic_codecvt_helper<char>

## Synopsis

    // In header: <boost/program_options/value_semantic.hpp>

    class value_semantic_codecvt_helper<char> :
      public boost::program_options::value_semantic
    {
    public:

      // private member functions
      virtual void
      parse(boost::any &, const std::vector< std::string > &, bool) const;

      // protected member functions
      virtual void
      xparse(boost::any &, const std::vector< std::string > &) const = 0;
    };

## Description

Helper conversion class for values that accept ascii strings as input. Overrides the 'parse' method and defines new 'xparse' method taking std::string. Depending on whether input to parse is ascii or UTF8, will pass it to xparse unmodified, or with UTF8->ascii conversion.

### `value_semantic_codecvt_helper` private member functions

1.     virtual void
       parse(boost::any & value_store, const std::vector< std::string > & new_tokens,
             bool utf8) const;

   Parses a group of tokens that specify a value of option. Stores the result in 'value_store', using whatever representation is desired. May be be called several times if value of the same option is specified more than once.

### `value_semantic_codecvt_helper` protected member functions

1.     virtual void
       xparse(boost::any & value_store,
              const std::vector< std::string > & new_tokens) const = 0;