[boost] Deprecation indication

Subject: [boost] Deprecation indication
From: Raffi Enficiaud (raffi.enficiaud_at_[hidden])
Date: 2017-06-06 13:14:09

Hi,

Is there anything in eg. boost.config or other that expands to a 
compiler indication that something is "deprecated", possibly with a 
message that appears only once?

It may expand to `[[deprecated]]` or `[[deprecated("reason")]]` if 
available and supported, or `__declspec(deprecated)` / 
`__declspec(deprecated("reason"))`, `__attribute__ ((deprecated))` ...

I could not find anything in boost.config. Has anyone an example of this 
in boost? Is there any indication/policy in boost about deprecation?

Thanks in advance,
Raffi