grammar_to_parser::basic_choice< E, A > Class Template Reference

#include <choice.h>

Inheritance diagram for grammar_to_parser::basic_choice< E, A >:

List of all members.

Public Types
typedef basic_parser< E >::parser_list	parser_list
typedef basic_parser< E >::parser_list_iterator	parser_list_iterator
Public Member Functions
	basic_choice ()
	Default constructor.
	basic_choice (const basic_choice &rhs)
	Copy constructor.
	basic_choice (const A &obj)
	Constructor taking a compound object.
virtual	~basic_choice ()
	Destructor.
virtual unsigned long	parse (const E *buf, const unsigned long buf_length)
virtual unsigned long	parse (const E *buf, const unsigned long buf_length, basic_parser_strategy< E > &strategy)
virtual std::basic_istream< E > &	parse (std::basic_istream< E > &is)

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Detailed Description

template<typename E, typename A>
class grammar_to_parser::basic_choice< E, A >

Choice as special case of nonterminal_type - parsed if one of symbols is parsed - this template class can be replaced by universal_non_terminal<> and by definition of strategy parsing one of symbols

• I decided to define new class, as this will be often used in grammar definitions.

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Member Function Documentation

template<typename E, typename A> std::basic_istream< E > & grammar_to_parser::basic_choice< E, A >::parse (  std::basic_istream< E > &  is  )  [virtual]

The method tries to parse any of the symbols, stops when finds the first successive parser Reimplemented from grammar_to_parser::basic_non_terminal< E, A >.

template<typename E, typename A> unsigned long grammar_to_parser::basic_choice< E, A >::parse (  const E *  buf, const unsigned long  buf_length, basic_parser_strategy< E > &  strategy )  [virtual]

The method calls the proper strategy method - parse_choice. Reimplemented from grammar_to_parser::basic_non_terminal< E, A >.

template<typename E, typename A> unsigned long grammar_to_parser::basic_choice< E, A >::parse (  const E *  buf, const unsigned long  buf_length )  [virtual]

The method tries to parse any of the symbols, stops when finds the first successive parser Parameters: *buf  Buffer containing the word to be parsed buf_length  The length of word, size of buffer Returns: The length of succesfully parsed word Reimplemented from grammar_to_parser::basic_non_terminal< E, A >.

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The documentation for this class was generated from the following file:

• choice.h

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