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P5chr zef:lizmat last updated on 2023-08-07
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Raku port of Perl's chr() / ord() built-ins


    use P5chr; # exports chr() and ord()

    my $a = 65;
    say chr $a;

    $_ = 65;
    say chr();   # bare chr may be compilation error to prevent P5isms in Raku

    my $a = "A";
    say ord $a;

    $_ = "A";
    say ord();   # bare ord may be compilation error to prevent P5isms in Raku


This module tries to mimic the behaviour of Perl's `chr` and `ord` built-ins as closely as possible in the Raku Programmming Language.


    chr NUMBER
    chr     Returns the character represented by that NUMBER in the character
            set. For example, "chr(65)" is "A" in either ASCII or Unicode, and
            chr(0x263a) is a Unicode smiley face.

            Negative values give the Unicode replacement character
            (chr(0xfffd)), except under the bytes pragma, where the low eight
            bits of the value (truncated to an integer) are used.

            If NUMBER is omitted, uses $_.

            For the reverse, use "ord".

            Note that characters from 128 to 255 (inclusive) are by default
            internally not encoded as UTF-8 for backward compatibility

    ord EXPR
    ord     Returns the numeric value of the first character of EXPR. If EXPR
            is an empty string, returns 0. If EXPR is omitted, uses $_. (Note
            character, not byte.)

            For the reverse, see "chr".


In future language versions of Raku, it will become impossible to access the `$_` variable of the caller's scope, because it will not have been marked as a dynamic variable. So please consider changing:


to either:


or, using the subroutine as a method syntax, with the prefix `.` shortcut to use that scope's `$_` as the invocant:



Elizabeth Mattijsen <[email protected]>

If you like this module, or what I’m doing more generally, committing to a [small sponsorship]( would mean a great deal to me!

Source can be located at: . Comments and Pull Requests are welcome.


Copyright 2018, 2019, 2020, 2021 Elizabeth Mattijsen

Re-imagined from Perl as part of the CPAN Butterfly Plan.

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.