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

class 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 sigilCount (): int

public sigilName (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.

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::sigilCount — Number of elements in matched rule
Parle\RParser::sigilName — Retrieve a rule or token name
Parle\RParser::token — Declare a token
Parle\RParser::tokenId — Get token id
Parle\RParser::trace — Trace the parser operation
Parle\RParser::validate — Validate input

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