Php/docs/class.parle-rparser

• PHP Manual
• Parle
• The Parle\RParser class

(PECL parle >= 0.7.0)

Introduction

Parser class. Rules can be defined on the fly. Once finalized, a Parle\RLexer instance is required to deliver the token stream.

Class synopsis

Parle\RParser {

/* Constants */

const int ACTION_ERROR = 0

const int ACTION_SHIFT = 1

const int ACTION_REDUCE = 2

const int ACTION_GOTO = 3

const int ACTION_ACCEPT = 4

const int ERROR_SYNTAX = 0

const int ERROR_NON_ASSOCIATIVE = 1

const int ERROR_UNKNOWN_TOKEN = 2

/* Properties */

public int $action = 0

public int $reduceId = 0

/* Methods */

public advance ( ) : void

public build ( ) : void

public consume ( string $data , Parle\RLexer $rlexer ) : void

public dump ( ) : void

public errorInfo ( ) : Parle\ErrorInfo

public left ( string $tok ) : void

public nonassoc ( string $tok ) : void

public precedence ( string $tok ) : void

public push ( string $name , string $rule ) : int

public reset ([ int $tokenId ] ) : void

public right ( string $tok ) : void

public sigil ([ int $idx ] ) : string

public token ( string $tok ) : void

public tokenId ( string $tok ) : int

public trace ( ) : string

public validate ( string $data , Parle\RLexer $lexer ) : bool

}

Predefined Constants

Parle\RParser::ACTION_ERROR

Parle\RParser::ACTION_SHIFT

Parle\RParser::ACTION_REDUCE

Parle\RParser::ACTION_GOTO

Parle\RParser::ACTION_ACCEPT

Parle\RParser::ERROR_SYNTAX

Parle\RParser::ERROR_NON_ASSOCIATIVE

Parle\RParser::ERROR_UNKNOWN_TOKEN

Properties

action

Current parser action that matches one of the action class constants, readonly.

reduceId

Grammar rule id just processed in the reduce action. The value corresponds either to a token or to a production id. Readonly.

Table of Contents

• Parle\RParser::advance — Process next parser rule
• Parle\RParser::build — Finalize the grammar rules
• Parle\RParser::consume — Consume the data for processing
• Parle\RParser::dump — Dump the grammar
• Parle\RParser::errorInfo — Retrieve the error information
• Parle\RParser::left — Declare a token with left-associativity
• Parle\RParser::nonassoc — Declare a token with no associativity
• Parle\RParser::precedence — Declare a precedence rule
• Parle\RParser::push — Add a grammar rule
• Parle\RParser::reset — Reset parser state
• Parle\RParser::right — Declare a token with right-associativity
• Parle\RParser::sigil — Retrieve a matching part of a rule
• Parle\RParser::token — Declare a token
• Parle\RParser::tokenId — Get token id
• Parle\RParser::trace — Trace the parser operation
• Parle\RParser::validate — Validate input