The Parle\Parser class

(PECL parle >= 0.5.1)

Introduction

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

class 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 left(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 validate(string $data, Parle\Lexer $lexer): bool

}

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.