in reply to Re^8: Order of evaluation/interpolation of references
in thread Order of evaluation/interpolation of references

And for me it's still not clear which order of interpolation should be named correct in your opinion.

For me it's intuitively natural to think that "$x$y$z" should act like join("",$x,$y,$z) .

But print join ("",${X(1)},${Y(2)}); prints

X
Y
22

[download]

because it's well defined that all arguments are evaluated before they are passed to a function.

So the whole point of this ill idea of returning the same reference with different side effects could only work because interpolation was inconsistent from the beginning.

Cheers Rolf

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Re^10: Order of evaluation/interpolation of references
by BrowserUk (Patriarch) on Mar 08, 2012 at 03:30 UTC
    it's well defined that all arguments are evaluated before they are passed to a function.

    If this is right:

    C:\test>perl -E"$\"=''; {my@x; sub X{ push@x,'x';;\@x}}; say qq[@{X()}
+@{X()}]"
xxx

    [download]

    Then this is wrong:

    C:\test>perl -E"{my$x; sub X{ $x.='x';\$x}}; say qq[${X()}${X()}]"
xxxx

    [download]

    And vice versa.

    From your other post:

    it's a clear violation ...

    Of what? Your sensibilities? Do you think the same about print "The price is: $obj->tostring()\n";?

    Saying you don't like it, is not the same as it being illegal. And it has always been legal, so it should be consistent.

    From my understanding, interpolating code references into strings is not just legal in Perl6, but further enhanced.

    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

    The start of some sanity?
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[select]
      > "The price is: $obj->tostring()\n";?

      Isn't evaled for me, could you please give me a complete and working snippet?

      Cheers Rolf

[reply]
        > "The price is: $obj->tostring()\n";? Isn't evaled for me,

        I know. But wouldn't it be convenient if it was interpolated(*)?

        See http://szabgab.com/perl-6--scalar-array-and-hash-interpolation.html

        Just expressions: say "Take 1+4";

        will print: Take 1+4

        as expected but as I wrote you can put any expression in the curly braces, so you can also write: say "Take {1+4}";

        that will print: Take 5

        Isn't that nicer than print "Take " . ( 1 + 4 ) . "\n";?

        And remember, interpolation is not like string eval, more like block eval. It can be compiled at compile time, and just run on demand.

        With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.

        The start of some sanity?
[reply]
[d/l]

In Section Seekers of Perl Wisdom