From zefram@fysh.org

Coercing from List to Set, where the List contains a Pair element​:

(​:a,3).perl
(​:a, 3)
(​:a,3).Set.perl
set("a",3)
(​:!a,3).perl
(​:!a, 3)
(​:!a,3).Set.perl
set(3)

I'd expect the coercion to yield a Set that contains a Pair element.
(Such a Set can readily be constructed by other means.) Instead it's
either replacing the Pair with its key or ignoring the Pair entirely.

-zefram

From @smls

Not a bug, and explained in the docs​:

https://docs.perl6.org/type/Set#Creating_Set_objects

Use set() or Set.new() to get the behavior you want.

The RT System itself - Status changed from 'new' to 'open'

From zefram@fysh.org

Sam S. via RT wrote​:

Not a bug, and explained in the docs​:

Fair enough. For the record, I didn't think to look at that bit of the
documentation​: I looked at the List class, which is silent about coercion
to Set, and at its superclass Any, which has a cryptic description that
I found difficult to interpret but which definitely doesn't say anything
about special behaviour for Pairs. Some description of coercing behaviour
on the source-type side would be useful; at least a pointer to the Set
doc section that describes the Pair thing.

-zefram

From @AlexDaniel

There are some tests for it here​: https://github.com/perl6/roast/blob/master/S02-types/set.t#L62-L72

However, Bools are not tested. Not sure if it is a reasonable assumption that bools will be covered by these tests, so I'd say we add to extra tests before closing this just in case.

Zefram, can you open a corresponding doc issue for the problem?

On 2017-03-12 04​:20​:30, zefram@​fysh.org wrote​:

Sam S. via RT wrote​:

Not a bug, and explained in the docs​:

Fair enough. For the record, I didn't think to look at that bit of the
documentation​: I looked at the List class, which is silent about coercion
to Set, and at its superclass Any, which has a cryptic description that
I found difficult to interpret but which definitely doesn't say anything
about special behaviour for Pairs. Some description of coercing behaviour
on the source-type side would be useful; at least a pointer to the Set
doc section that describes the Pair thing.

-zefram

From @zoffixznet

Tests added​: Raku/roast@1e20619853

@zoffixznet - Status changed from 'open' to 'resolved'