Charm++ parallel programming system

[Jonah Miller <jonah.maxwell.miller AT gmail.com>]

Hi Sam,

Thanks for your reply. This helps a lot. Since enum types can't have 
methods, I will need to overload the pipe operator, but a naive 
implementation results in compile time errors. Can you instruct me in 
the best way to overload the pipe operator for PUP? Here is my current 
attempt:

#ifndef INCLUDED_SIDES_HPP
#define INCLUDED_SIDES_HPP

#include <pup.h>

enum class Side{LEFT, RIGHT};

PUP::er& operator|(PUP::er& p, Side& s) {
  pup_bytes(&p, (void*)&s, sizeof(Side));
}

#endif // INCLUDED_SIDES_HPP

and this raises an error at linking time that says I've over-defined the 
| operator:

~/programming/charm-functional-wavetoy/Sides.hpp:14: multiple definition 
of `operator|(PUP::er&, Side&)'
wavetoy_unit_tests.o:/home/jmiller/programming/charm-functional-wavetoy/Sides.hpp:14: 
first defined here
unittests.o: In function `operator|(PUP::er&, Side&)':
~/programming/charm-functional-wavetoy/Sides.hpp:14: multiple definition 
of `operator|(PUP::er&, Side&)'
wavetoy_unit_tests.o:~/programming/charm-functional-wavetoy/Sides.hpp:14: first 
defined here
collect2: error: ld returned 1 exit status

This is strange, because the compiler is pointing to the same file in 
both cases, which is protected by include guards. Thanks for your help!

Best,
Jonah


On 15-07-08 11:59 AM, White, Samuel T wrote:
> Hi Jonah,
>
> The most portable way to PUP an enumerated type is to use the pup_bytes() 
> interface, as in:
>
> void pup(PUP::er &p) {
>      pup_bytes(&p, (void *)&enum_var, sizeof(enum_type));
> }
>
> -Sam
> ________________________________________
> From: 
> charm-bounces AT cs.uiuc.edu
>  
> [charm-bounces AT cs.uiuc.edu]
>  on behalf of Jonah Miller 
> [jonah.maxwell.miller AT gmail.com]
> Sent: Saturday, July 04, 2015 4:58 PM
> To: 
> charm AT cs.uiuc.edu
> Subject: [charm] PUP and enum types
>
> Hi Everyone,
>
> I have a quick question about the PUP framework. What is the proper way
> to pack or unpack enumerations? Under the hood, enumerations are
> integers, so it seems like they should be pup-able. But I wondered if
> there was a straightforward or "correct" way to do it.
>
> Thanks in advance for your help.
>
> Best,
> Jonah Miller
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