list - 滑动文档错误？？？ [乐]

Question

在类 Slip ( https://docs.raku.org/type/Slip ) 的 raku 文档以及“列表、序列和数组”文档(幻灯片部分: https://docs.raku.org/language/list )中，声明“滑动”、“滑动(方法)”和“|(前缀)”可用于创建单据，但它们的行为 略 “不同的”。

问题是我试图确认上述声明，但结果令人失望。

我运行以下测试以找出差异:

my $l = (1, 2, 3);

say (0, slip($l, 4)).perl;
say (0, ($l, 4).Slip).perl;
say (0, |($l, 4)).perl;

say '------------------------------';

say (slip($l, 4)).perl;
say (($l, 4).Slip).perl;
say (|($l, 4)).perl;

say '------------------------------';

say (0, slip($l)).perl;
say (0, ($l).Slip).perl;
say (0, |($l)).perl;

say '------------------------------';

say (0, slip $l).perl;
say (0, $l.Slip).perl;
say (0, |$l).perl;

say '------------------------------';

say (slip $l).perl;
say ($l.Slip).perl;
say (|$l).perl;

他们三个的结果都是一样的:

(0, $(1, 2, 3), 4)
(0, $(1, 2, 3), 4)
(0, $(1, 2, 3), 4)
------------------------------
slip($(1, 2, 3), 4)
slip($(1, 2, 3), 4)
slip($(1, 2, 3), 4)
------------------------------
(0, 1, 2, 3)
(0, 1, 2, 3)
(0, 1, 2, 3)
------------------------------
(0, 1, 2, 3)
(0, 1, 2, 3)
(0, 1, 2, 3)
------------------------------
slip(1, 2, 3)
slip(1, 2, 3)
slip(1, 2, 3)

有问题还是文档错误？

Answer 1

再往下一点，您会发现 ( a? ) 差异的示例:

Please note that prefix:<|> will also apply parameters in a slippy manner to a routine call. It does not forward a Slip to the called routine, that includes return and take.

my \l = gather for 1..10 -> $a, $b { take |($a, $b) }; say l.perl;
# OUTPUT: «((1, 2), (3, 4), (5, 6), (7, 8), (9, 10)).Seq
my \m= gather for 1..10 -> $a, $b { take ($a, $b).Slip }; say m.perl;
# OUTPUT: «(1, 2, 3, 4, 5, 6, 7, 8, 9, 10).Seq