[Issue 3572] declaring pure function with void return type should be compile time error

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3572



--- Comment #4 from David Simcha <dsimcha at yahoo.com> 2010-02-17 18:38:36 PST ---
(In reply to comment #3)
> Why doesn't it make sense? Aren't you thinking of inout parameters? A pure
> function  void foo(out A a); ought to be exactly the same as A foo(); together
> with an assignment. I'm not seeing anything impure in that.
> BTW, it works fine in CTFE. (CTFE isn't quite the same concept as pure, but
> it's close).

You're right, I did get confused between out and ref.  Allowing out parameters
in pure functions makes sense.  I tend to forget how out parameters work
because I almost never use them.  I almost always just return a tuple or a
struct.

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