Lexer Class Reference

#include <Lexer.hpp>

Inheritance diagram for Lexer:

[legend]

List of all members.

Public Types
typedef std::map< const char *, int, Lexer::eqstr >	KeyWordList
Public Member Functions
	Lexer (std::istream &In, std::ostream &Out=std::cout, const size_t WMaxL=255)
	Constructs a Lexer.
virtual	~Lexer ()
	Destructor.
virtual int	yylex ()=0
	Interface with parser.
const size_t &	lineno () const
	Read-only access to the current line number.
const char *	YYText () const
	Read-only access to the current Word.
Protected Attributes
std::istream &	in
	The input std::istream.
std::ostream &	out
	The output std::istream.
size_t	linenumber
	The current number line.
std::string	yytext
	The current "word".
KeyWordList	__keyWordList
int	declarationToken
Private Attributes
size_t	WordMaxLenght
	The maximum autorized length for a "word".
Classes
struct	eqstr

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Detailed Description

This class is the base class for all lexers.

Remarks:

It has been written to replace the use of flex which did not worked under MS-Windows (using cygwin). This should make the porting of the code easier.

Author:

Stéphane Del Pino.

Definition at line 44 of file Lexer.hpp.

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Member Typedef Documentation

typedef std::map<const char*, int, Lexer::eqstr> Lexer::KeyWordList

a list of known Keyword.

Definition at line 75 of file Lexer.hpp.

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Constructor & Destructor Documentation

Lexer::Lexer	(	std::istream &	In,
		std::ostream &	Out = std::cout,
		const size_t	WMaxL = 255
	)			[inline]

Constructs a Lexer.

Definition at line 87 of file Lexer.hpp.

References linenumber.

    : WordMaxLenght(WMaxL),
      in(In),
      out(Out)      
  {
    //    yytext = new char[WMaxL+1];
    linenumber = 1;
  }

virtual Lexer::~Lexer

(

)

[inline, virtual]

Destructor.

Definition at line 99 of file Lexer.hpp.

  {
    ;
  }

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Member Function Documentation

virtual int Lexer::yylex

(

)

[pure virtual]

Interface with parser.

Implemented in FFLexer, POVLexer, and XMLLexer.

const size_t& Lexer::lineno

(

)

const [inline]

Read-only access to the current line number.

Definition at line 108 of file Lexer.hpp.

References linenumber.

  {
    return linenumber;
  }

const char* Lexer::YYText

(

)

const [inline]

Read-only access to the current Word.

Definition at line 114 of file Lexer.hpp.

References yytext.

  {
    return yytext.c_str();
  }

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Member Data Documentation

size_t Lexer::WordMaxLenght [private]

The maximum autorized length for a "word".

Definition at line 48 of file Lexer.hpp.

std::istream& Lexer::in [protected]

The input std::istream.

Definition at line 60 of file Lexer.hpp.

Referenced by XMLLexer::XMLLexer(), XMLLexer::yylex(), POVLexer::yylex(), and FFLexer::yylex().

std::ostream& Lexer::out [protected]

The output std::istream.

Definition at line 63 of file Lexer.hpp.

size_t Lexer::linenumber [protected]

The current number line.

Definition at line 66 of file Lexer.hpp.

Referenced by Lexer(), lineno(), XMLLexer::yylex(), POVLexer::yylex(), and FFLexer::yylex().

std::string Lexer::yytext [protected]

The current "word".

Definition at line 69 of file Lexer.hpp.

Referenced by XMLLexer::yylex(), POVLexer::yylex(), FFLexer::yylex(), and YYText().

KeyWordList Lexer::__keyWordList [protected]

Definition at line 78 of file Lexer.hpp.

Referenced by FFLexer::FFLexer(), POVLexer::isKeyword(), FFLexer::isKeyword(), POVLexer::POVLexer(), and FFLexer::switchToContext().

int Lexer::declarationToken [protected]

This contains the token associated to a type. This is used for variables declaration to know its type.

Definition at line 83 of file Lexer.hpp.

Referenced by FFLexer::yylex().

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

• Lexer.hpp