Once again I've become a perl beginner (do you ever stop?), except this time it's in perl6. Starting from ideas that I know well, I chose to redesign a portion of previous code of mine, in this case a chessboard. The first two classes went well (or at least worked, I know so little that I can't speak to their correctness…) but I'm stuck with the third. Here is the code:

#!/home/hsmyers/rakudo741/bin/perl6
# board.p6 - Beginnings of a PGN toolset. And place to start learning
#            Perl 6/Raku.
use v6d;

#!____________________________________________________________________
+_________

constant $size = 4;

class Piece {
    my Str @namesOfPieces[$size] = <
        white-rook white-knight white-bishop white-queen
    >;
    my Str @abrevsOfPieces[$size] = <
        R N B Q K B N R
    >;
    my Str @symbolsOfPieces[$size] = <
        &#9814; &#9816; &#9815; &#9813; &#9812; &#9815; &#9816; &#9814
+;
    >;
    my Str @codeptsOfPieces[$size] = (
        "\x2656", "\x2658", "\x2657", "\x2655",
    );
    has Str $.name;
    has Str $.abrev;
    has Str $.symbol;
    has Uni $.codept;

    submethod BUILD( :$i ) {
        $!name   = @namesOfPieces[$i];
        $!abrev  = @abrevsOfPieces[$i];
        $!symbol = @symbolsOfPieces[$i];
        $!codept = @codeptsOfPieces[$i].NFC;
    }
}

class Square {
    my Int @colors[$size] = <
        1 0 1 0 1 0 1 0
    >;
    my Str @names[$size] = <
        a1 b1 c1 d1 e1 f1 g1 h1
    >;
    has Int   $.color;
    has Int   $.index;
    has Str   $.name;
    has Piece $.piece;

    submethod BUILD( :$i ) {
        $!color = @colors[$i];
        $!index = $i;
        $!name  = @names[$i];
        $!piece = Piece.new(:i($i));
    }
}

class Board is Array {
}

my $p = Piece.new(:i(0));
$p.say;
my $s = Square.new(:i(0));
$s.say;

#!____________________________________________________________________
+_________
my @b := Board.new(
    Square.new(:i(0)),
    Square.new(:i(1)),
    Square.new(:i(2))
);
say @b;
say @b.WHAT;

[download]

The Board class (empty as it is) is all that is left from my attempts so far. Amazingly (at least to me) it provides a degree of workability!. It has variously had a "new" and a "BUILD", neither provided a working solution. Obviously the current approach doesn't work considering that the actual count will be 64 and not 4.

My current notion is that I need to build an array of 64 Squares which in turn will create the needed pieces. I've tried to add to self with nothing working. Suggestions?

--hsm

"Never try to teach a pig to sing...it wastes your time and it annoys the pig."

In reply to [raku] How to use an object array in perl6 by hsmyers

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