Archon::Utilities::LrParserBase Class Reference

An abstract base class for LR parsers. More...

#include <archon/util/lr_parser_base.H>

Inheritance diagram for Archon::Utilities::LrParserBase:

[legend]Collaboration diagram for Archon::Utilities::LrParserBase:

[legend]List of all members.

Public Member Functions
virtual	~LrParserBase ()
void	parse (LexerBase &lexer, Logger *l=0) const
	Use this method if you want to do syntax checking only.
void	parse (LexerBase &lexer, Context &c, Logger *l=0) const
	Use this method if your result becomes available through the context object.
template<class R>
void	parse (LexerBase &lexer, Context &c, Ref< const R > &result, Logger *l=0)
	Use this method if your result is the value of the start symbol of the grammar.
Protected Member Functions
	LrParserBase (CFG &, const ActorBase *, const Printer *)
virtual int	getAction (int state, int terminal) const =0
	The end of input (EOI) is represented by a terminal value of -1.
virtual int	getGoto (int state, int nonterminal) const =0
	Returns: i > -1 => goto state i i <= -1 => error.
Protected Attributes
CFG	grammar
vector< Production >	productions
Classes
class	Actor
struct	ActorBase
struct	AttributeTypeException
struct	CallException
	For internal use only. More...
struct	Context
struct	Printer
struct	Production

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Detailed Description

An abstract base class for LR parsers.

Todo:

Considder including "lr_parser_methods.H" in this file.

It is not obvious to the user when it has to be included.

Definition at line 86 of file lr_parser_base.H.

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Member Function Documentation

virtual int Archon::Utilities::LrParserBase::getAction (  int  state, int  terminal )  const [protected, pure virtual]

The end of input (EOI) is represented by a terminal value of -1. Actions are represented by one integer where: i > -1 => shift and goto state i i = -1 => error i = -2 => accept i < -2 => reduce by production -3-i

template<class R> void Archon::Utilities::LrParserBase::parse (  LexerBase &  lexer, Context &  c, Ref< const R > &  result, Logger *  l = 0 )  [inline]

Use this method if your result is the value of the start symbol of the grammar. Todo: Parser errors must be handled properly. Definition at line 306 of file lr_parser_base.H. References Archon::Utilities::Ref< T >::get().

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

• archon/util/lr_parser_base.H
• archon/util/lr_parser_base.C

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