[geos-devel] pragma once

[Howard Butler]

On 12/19/18 11:26 AM, Greg Troxel wrote:
> Paul Ramsey <pramsey at cleverelephant.ca> writes:
>
>> "non standard but widely supported"
>>
>> https://en.wikipedia.org/wiki/Pragma_once
>>
>> Includes MSVC! :)
> As much as I hate to depart from standards, that does look near
> universal.


Go for #pragma once. We haven't regretted it in PDAL for the nearly
eight years we've existed. It cleans up tons of #ifdef churn and culls a
set of difficult-to-debug situations (same ifdef being used from
copypasta code). 


You have probably clipped off every compiler that doesn't support
#pragma once with the C++11 requirement anyway...


Howard


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