The Parle\RLexer class

(PECL parle >= 0.5.1)

はじめに

Multistate lexer class. Lexemes can be defined on the fly. If the particular lexer instance is meant to be used with Parle\RParser, the token IDs need to be taken from there. Otherwise, arbitrary token IDs can be supplied. Note, that Parle\Parser is not compatible with this lexer.

クラス概要

class Parle\RLexer {

/* 定数 */

const int ICASE = 1;

const int DOT_NOT_LF = 2;

const int DOT_NOT_CRLF = 4;

const int SKIP_WS = 8;

const int MATCH_ZERO_LEN = 16;

/* プロパティ */

public bool $bol = false;

public int $flags = 0;

public int $state = 0;

public int $marker = 0;

public int $cursor = 0;

/* メソッド */

public function advance(): void

public function build(): void

public function callout(int $id, callable $callback): void

public function consume(string $data): void

public function dump(): void

public function getToken(): Parle\Token

public function insertMacro(string $name, string $regex): void

public function push(string $regex, int $id): void

public function push(
    string $state,
    string $regex,
    int $id,
    string $newState
): void

public function push(string $state, string $regex, string $newState): void

public function pushState(string $state): int

public function reset(int $pos): void

}

定義済み定数

Parle\RLexer::ICASE
Parle\RLexer::DOT_NOT_LF
Parle\RLexer::DOT_NOT_CRLF
Parle\RLexer::SKIP_WS
Parle\RLexer::MATCH_ZERO_LEN

プロパティ

bol: Start of input flag.
flags: Lexer flags.
state: Current lexer state, readonly.
marker: Position of the latest token match, readonly.
cursor: Current input offset, readonly.

Parle\RLexer::advance — Process next lexer rule
Parle\RLexer::build — Finalize the lexer rule set
Parle\RLexer::callout — Define token callback
Parle\RLexer::consume — Pass the data for processing
Parle\RLexer::dump — Dump the state machine
Parle\RLexer::getToken — Retrieve the current token
Parle\RLexer::insertMacro — Insert regex macro
Parle\RLexer::push — Add a lexer rule
Parle\RLexer::pushState — Push a new start state
Parle\RLexer::reset — Reset lexer

関連キーワード:

Parle RLexer lexer state token regex push reset advance flags readonly rule Lexer 定数プロパティ marker cursor build callout callback consume dump getToken insertMacro newState

The Parle\RLexer class

はじめに

クラス概要

定義済み定数

プロパティ

目次