From @grondilu

Hi,

My version of rakudo​:
This is perl6 version 2012.09.1-7-gfb11f13 built on parrot 4.8.0 revision RELEASE_4_8_0

I was trying to use an environment variable to assign a boolean
to a constant​:

BEGIN { %*ENV<FOO> //= "bar" }
constant FOO_IS_BAR = %*ENV<FOO> ~~ "bar" | "Bar";

I got the following error​:
===SORRY!===
Cannot assign to a non-container

shell returned 1

The error can be reproduced quicker this way (but it has less meaning)​:

constant x = "foo" ~~ /bar/;

The same line does not produce any error with niecza.

Regards

From @usev6

Hi,

this works now (probably for a while, already). I added a test to S04-declarations/constant.t with the following commit​: Raku/roast@6cc8c38a1c

Please note​: If you smart match agains a regex you don't get a boolean value but either a Match object or Nil​:

("foo" ~~ /foo/).WHAT.say
(Match)
("foo" ~~ /bar/).WHAT.say
Nil

As per S03 you can use "so" to force a Bool value​:

("foo" ~~ /foo/).so
True
("foo" ~~ /bar/).so
False

But that's only a minor point, the assignment to a constant works for all versions.

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

@usev6 - Status changed from 'open' to 'resolved'