滑动文档错误？？？ [乐]

Question

在 class Slip (https://docs.raku.org/type/Slip) and also in "Lists, sequences, and arrays" documentation (slips section: https://docs.raku.org/language/list) 的 raku 文档中，指出 "slip"、"Slip (method)" 和“|（前缀）”可用于创建滑倒，但他们表现得轻微 "different".

问题是我试图证实上述说法，但结果令人失望。

我运行进行了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;

三个结果都一样：

(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

在文档的更下方，您会找到 (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

滑动文档错误？？？ [乐]

Slip documentation bug ??? [ RAKU ]

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