Class: PHP_ParserGenerator_ActionTable

Source Location: /ParserGenerator/ActionTable.php

Class PHP_ParserGenerator_ActionTable

Class Overview

The state of the yy_action table under construction is an instance of

the following structure

Located in /ParserGenerator/ActionTable.php [line 58]

Author(s):

Gregory Beaver <cellog@php.net>

Information Tags:

Since:	Class available since Release 0.1.0
Version:	@package_version@
License:	New BSD License
Copyright:	2006 Gregory Beaver

Properties

Methods

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Property Summary

array	$aAction	The $yy_action table under construction.
array	$aLookahead	A single new transaction set.
int	$mnAction	The action associated with the smallest lookahead token.
int	$mnLookahead	The smallest (minimum) value of any lookahead token in $aLookahead
int	$mxLookahead	The largest (maximum) value of any lookahead token in $aLookahead
int	$nAction	Number of used slots in $aAction
int	$nLookahead	The number of slots used in $aLookahead.

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Method Summary

void	acttab_action()	Add a new action to the current transaction set
int	acttab_insert()	Add the transaction set built up with prior calls to acttab_action() into the current action table. Then reset the transaction set back to an empty set in preparation for a new round of acttab_action() calls.

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Properties

array $aAction = array(array(
'lookahead' => -1,
'action' => -1
)) [line 78]

The $yy_action table under construction.

Each entry is of format:

array(
'lookahead' => -1, // Value of the lookahead token (symbol index)
'action' => -1 // Action to take on the given lookahead (action index)
);

API Tags:

Access:	public
See:	PHP_ParserGenerator_Data::compute_action()

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array $aLookahead = array(array(
'lookahead' => 0,
'action' => 0
)) [line 89]

A single new transaction set.

API Tags:

Access:	public
See:	$aAction format of the internal array is described here

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int $mnAction = 0 [line 107]

The action associated with the smallest lookahead token.

API Tags:

Access:	public
See:	PHP_ParserGenerator_ActionTable::$mnLookahead

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int $mnLookahead = 0 [line 101]

The smallest (minimum) value of any lookahead token in $aLookahead

The lowest non-terminal is always introduced earlier in the parser file, and is therefore a more significant token.

API Tags:

Access:

public

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int $mxLookahead = 0 [line 112]

The largest (maximum) value of any lookahead token in $aLookahead

API Tags:

Access:

public

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int $nAction = 0 [line 64]

Number of used slots in $aAction

API Tags:

Access:

public

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int $nLookahead = 0 [line 121]

The number of slots used in $aLookahead.

This is the same as count($aLookahead), but there was no pressing reason to change this when porting from C.

API Tags:

Access:	public
See:	PHP_ParserGenerator_ActionTable::$mnLookahead

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Methods

acttab_action [line 128]

void acttab_action(
int
$lookahead, int
$action 
)

Add a new action to the current transaction set

Parameters:

int	$lookahead:
int	$action:

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acttab_insert [line 161]

int acttab_insert(
)

Add the transaction set built up with prior calls to acttab_action() into the current action table. Then reset the transaction set back to an empty set in preparation for a new round of acttab_action() calls.

Return the offset into the action table of the new transaction.

API Tags:

Return:

Return the offset that should be added to the lookahead in order to get the index into $yy_action of the action. This will be used in generation of $yy_ofst tables (reduce and shift)

Information Tags:

Throws:

Exception

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Documentation generated on Sun, 02 Jul 2006 09:10:57 -0400 by phpDocumentor 1.3.0

	PHP_ParserGenerator

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