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The asio::buffer function has (void*, size_t) and (PodType(&)[N]) overloads.
I didn't want to write ugly C-style (&x, sizeof(x)) code, so I wrote this:

SomePacket packet[1]; // SomePacket is POD
read(socket, asio::buffer(packet));
foo = packet->foo;

But that packet-> looks kinda weird - the packet is an array after all.
(And packet[0]. doesn't look better.)

Now, I think if it was a good idea to write such code. Maybe I should stick to unsafe C-style code with void* and sizeof?

Upd: here is another example, for writing a packet:

SomePacket packet[1]; // SomePacket is POD
packet->id = SomePacket::ID;
packet->foo = foo;
write(socket, asio::buffer(packet));
share|improve this question
"Now, I think if it was a good idea to write such code" Come again? – Mooing Duck Sep 26 '12 at 19:35
I had to read this like 5 times to figure out what you were doing. Go with the C-style, because I would have only have had to read this once. – Mooing Duck Sep 26 '12 at 19:36
Actually, is an interesting idea as well, and is clearer WRT the buffer and object. – Mooing Duck Sep 26 '12 at 19:50
I'm a bit hazy on P.SE's policies, but wouldn't this be a better fit for SO? ICBWT. – sbi Sep 26 '12 at 19:51
What's ugly about sizeof()? – James Sep 27 '12 at 12:58
up vote 3 down vote accepted

If I were you, I'd create a function:

template< typename PodType >
whatever buffer(PodType& obj) { return buffer(&obj, sizeof(obj)) }

But this is so obvious an omission in the set of overloads provided, that I wonder if I'm missing something.

share|improve this answer
How do you SFINAE on PodType being, well, a POD type? I believe that any type traits that could do that need some sort of compiler assistance. – Lars Viklund Sep 28 '12 at 3:24
@Lars: Isn't there a std::is_pod<> in C++11? (I am not sure, since I haven't played with C++11 yet.) – sbi Sep 29 '12 at 10:36
Yes, you have is_pod in C++11. Boost.Asio hasn't abandoned all the people with C++03 compilers yet. Just because a new language standard appears doesn't mean that everyone magically are on conformant compilers, particularly not for existing products. – Lars Viklund Sep 29 '12 at 16:56

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