[Issue 8121] "scope ref" is perfectly OK

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8121


Matthias Walter <xammy at xammy.info> changed:

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                 CC|                            |xammy at xammy.info


--- Comment #2 from Matthias Walter <xammy at xammy.info> 2012-07-19 23:58:04 PDT ---
Does this bug report also cover the case of *returning* scope ref in order to
make the following possible:

scope ref T opIndex(...);

For example in std.container.Array this is helpful in order to write

array[0].method()

because for by-value opIndex the method() is called on a *copy* of the first
element!

On the other hand returning by (the usual) ref prevents the container from
being a 'sealed container' and hence the restriction would say:

"opIndex returns by reference but this reference may not be escaped but only be
used to call a method (including operators) on the returned object."

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