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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

Parle\Parser {
/* 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\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

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https://www.php.net/manual/en/class.parle-parser.php