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Postings from July 2001
On Tue, Jun 12, 2001 at 01:14:15PM +0100, Mike Guy wrote:
>
> --- ./pod/perlop.pod.orig Sun May 6 15:24:51 2001
> +++ ./pod/perlop.pod Tue Jun 12 13:10:01 2001
> @@ -658,13 +658,15 @@
> Customary Generic Meaning Interpolates
> '' q{} Literal no
> "" qq{} Literal yes
> - `` qx{} Command yes (unless '' is delimiter)
> + `` qx{} Command yes*
> qw{} Word list no
> - // m{} Pattern match yes (unless '' is delimiter)
> - qr{} Pattern yes (unless '' is delimiter)
> - s{}{} Substitution yes (unless '' is delimiter)
> + // m{} Pattern match yes*
> + qr{} Pattern yes*
> + s{}{} Substitution yes*
> tr{}{} Transliteration no (but see below)
>
> + * unless the delimiter is ''.
> +
> Non-bracketing delimiters use the same character fore and aft, but the four
> sorts of brackets (round, angle, square, curly) will all nest, which means
> that
> @@ -733,6 +735,15 @@
> and although they often accept just C<"\012">, they seldom tolerate just
> C<"\015">. If you get in the habit of using C<"\n"> for networking,
> you may be burned some day.
> +
> +Subscripted variables such as C<$a[3]> or C<$href->{key}[0]> are also
> +interpolated, as are array and hash slices. But method calls
> +such as C<$obj->meth> are not interpolated.
> +
> +Interpolating an array or slice interpolates the elements in order,
> +separated by the value of C<$">, so is equivalent to interpolating
> +C<join $", @array>. "Punctuation" arrays such C<@+> are not
> +interpolated.
Perhaps it should be added that "@_" *does* get interpolated. It's
debatable whether @_ is an punctuation array or not - but if it isn't
you should be able to my() it, and you cannot.
Furthermore, it is not the entire story, @? and @{'?'} are two ways
of addressing the same array, and "@{'?'}" does get interpolated.
Abigail
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