The Parle\Lexer class

    (PECL parle >= 0.5.1)

    Einführung

    Single state lexer class. Lexemes can be defined on the fly. If the particular lexer instance is meant to be used with Parle\Parser, the token IDs need to be taken from there. Otherwise, arbitrary token IDs can be supplied. This lexer can give a certain performance advantage over Parle\RLexer, if no multiple states are required. Note, that Parle\RParser is not compatible with this lexer.

    Klassenbeschreibung

    classParle\Lexer {
    constintICASE = 1;
    constintDOT_NOT_LF = 2;
    constintDOT_NOT_CRLF = 4;
    constintSKIP_WS = 8;
    constintMATCH_ZERO_LEN = 16;
    publicbool$bol = false;
    publicint$flags = 0;
    publicint$state = 0;
    publicint$marker = 0;
    publicint$cursor = 0;
    publicadvance(): void
    publicbuild(): void
    publiccallout(int$id, callable$callback): void
    publicconsume(string$data): void
    publicdump(): void
    publicgetToken(): Parle\Token
    publicinsertMacro(string$name, string$regex): void
    publicpush(string$regex, int$id): void
    publicreset(int$pos): void
    }

    Eigenschaften

    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.

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