The Parle\Parser class

Introduction

(PECL parle >= 0.5.1)

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

Class synopsis

public advance ( ) : void

public build ( ) : void

public consume ( string $data , Parle\Lexer $lexer ) : 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\Lexer $lexer ) : bool

Predefined Constants

Parle\Parser::ACTION_ERROR

Parle\Parser::ACTION_SHIFT

Parle\Parser::ACTION_REDUCE

Parle\Parser::ACTION_GOTO

Parle\Parser::ACTION_ACCEPT

Parle\Parser::ERROR_SYNTAX

Parle\Parser::ERROR_NON_ASSOCIATIVE

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