Re: Hex to array conversion

I came across a warning I hadn't seen before when initialising an array of RGBs when looking at this.

my @rgbVals = qw{ #ff00ff #2e7fee };
[download]

warned with

Possible attempt to put comments in qw() list ...
[download]

The category I found to switch the warning off was "syntax" which potentially covers a lot of ground; "comment" or "comments" was not recognised. Here's the code

use strict;
use warnings;

my @rgbVals = do
   {
       no warnings q{syntax};
       qw{ #ff00ff #2e7fee };
   };

print
   map {
           qq{@{
                 [
                     join q{,}, map { hex } m{^.(..)(..)(..)}
                 ]
             }\n}
       }
   @rgbVals;
[download]

I'd be interested in knowing if there was some finer-grained warnings category covering this.

Cheers,

JohnGG

Update: Thanks to toolic, TGI and FunkyMonk for the responses. I did try to find out in warnings but no luck there. I found "syntax" in a table in the Camel book (3rd Edn. pp 863) but didn't see "qw".

Comment on Re: Hex to array conversion Select or Download Code

Replies are listed 'Best First'.
Re^2: Hex to array conversion by TGI (Parson) on Oct 08, 2007 at 18:48 UTC
The category is `qw`. `use warnings; @foo = qw( #foo bar,baz ); # Throw a warning; { no warnings 'qw'; @foo = qw( #foo bar,baz ); # Don't throw a warning; }` [download] TGI says moo	[reply] [d/l]
Re^2: Hex to array conversion by FunkyMonk (Bishop) on Oct 08, 2007 at 20:54 UTC
diagnostics will tell you which category a warning belongs to: `Possible attempt to put comments in qw() list at /temp/pm line 21 (#1) (W qw) qw() lists contain items separated by whitespace; as with l +iteral ...` [download] The last line quoted above starts `(W qw)` telling you that this warning belongs to the qw category.	[reply] [d/l] [select]
Re^2: Hex to array conversion by toolic (Bishop) on Oct 08, 2007 at 15:32 UTC
That is a great question, and I wish I knew the answer. You could always do it the hard way: `my @rgbVals = ('#ff00ff', '#2e7fee');` [download] The disadvantage of this is that you lose the capability of the `qw` operator. The advantage is that you do not have to turn off warnings and worry about what you might be missing.	[reply] [d/l] [select]