Puma::TokenProvider Class Reference

Reads tokens from a token source. More...

#include <Puma/TokenProvider.h>

Inheritance diagram for Puma::TokenProvider:

List of all members.

Public Types
typedef TokenStore::Iterator	State
	Read position.

Public Member Functions
	TokenProvider (PumaTokenSource &s)
	Constructor.
virtual	~TokenProvider ()
	Destructor.
void	init ()
	Initialize the token provider by reading the first token.
PumaTokenSource &	source () const
	Get the token source.
Token *	next ()
	Read the next token from the token source.
Token *	current () const
	Get the last token read from the token source.
State	get_state ()
	Get the current read position.
void	set_state (State restored_pos)
	Restore the read position.

Protected Types
typedef BCList< void *, 8192 >	TokenStore

Protected Member Functions
virtual void *	read ()
	Read next token.
virtual Token *	token () const
	Get the current token.

Protected Attributes
PumaTokenSource &	_source
TokenStore	_tokens
TokenStore::Iterator	_read_pos

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Detailed Description

Reads tokens from a token source.

Supports unlimited look ahead. A token source can be a file, a string, a token preprocessor, and so on.

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Member Typedef Documentation

typedef TokenStore::Iterator Puma::TokenProvider::State

Read position.

typedef BCList<void*, 8192> Puma::TokenProvider::TokenStore

protected

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Constructor & Destructor Documentation

Puma::TokenProvider::TokenProvider ( PumaTokenSource &  s )

inline

Constructor.

Parameters:

s	The token source from which to read the tokens.

virtual Puma::TokenProvider::~TokenProvider ( )

inlinevirtual

Destructor.

The compiler complains if we done define a virtual destrcutor.

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Member Function Documentation

Token* Puma::TokenProvider::current ( ) const

inline

Get the last token read from the token source.

State Puma::TokenProvider::get_state ( )

inline

Get the current read position.

void Puma::TokenProvider::init ( )

inline

Initialize the token provider by reading the first token.

Token* Puma::TokenProvider::next ( )

inline

Read the next token from the token source.

virtual void* Puma::TokenProvider::read ( )

inlineprotectedvirtual

Read next token.

Reimplemented in Puma::InstantiationTokenProvider.

void Puma::TokenProvider::set_state ( State  restored_pos )

inline

Restore the read position.

Parameters:

restored_pos

The new read position.

PumaTokenSource& Puma::TokenProvider::source ( ) const

inline

Get the token source.

virtual Token* Puma::TokenProvider::token ( ) const

inlineprotectedvirtual

Get the current token.

Reimplemented in Puma::InstantiationTokenProvider.

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Member Data Documentation

TokenStore::Iterator Puma::TokenProvider::_read_pos

protected

PumaTokenSource& Puma::TokenProvider::_source

protected

TokenStore Puma::TokenProvider::_tokens

protected